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|
- /*! 2.13.2 */
- var JSHINT;
- if (typeof window === 'undefined') window = {};
- (function () {
- var require;
- require=(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
- var identifierStartTable = [];
- for (var i = 0; i < 128; i++) {
- identifierStartTable[i] =
- i === 36 || // $
- i >= 65 && i <= 90 || // A-Z
- i === 95 || // _
- i >= 97 && i <= 122; // a-z
- }
- var identifierPartTable = [];
- for (var i = 0; i < 128; i++) {
- identifierPartTable[i] =
- identifierStartTable[i] || // $, _, A-Z, a-z
- i >= 48 && i <= 57; // 0-9
- }
- module.exports = {
- asciiIdentifierStartTable: identifierStartTable,
- asciiIdentifierPartTable: identifierPartTable
- };
- },{}],2:[function(require,module,exports){
- module.exports = 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- },{}],3:[function(require,module,exports){
- var str = 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- var arr = str.split(',').map(function(code) {
- return parseInt(code, 10);
- });
- module.exports = arr;
- },{}],4:[function(require,module,exports){
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- var arr = str.split(',').map(function(code) {
- return parseInt(code, 10);
- });
- module.exports = arr;
- },{}],5:[function(require,module,exports){
- // http://wiki.commonjs.org/wiki/Unit_Testing/1.0
- //
- // THIS IS NOT TESTED NOR LIKELY TO WORK OUTSIDE V8!
- //
- // Originally from narwhal.js (http://narwhaljs.org)
- // Copyright (c) 2009 Thomas Robinson <280north.com>
- //
- // Permission is hereby granted, free of charge, to any person obtaining a copy
- // of this software and associated documentation files (the 'Software'), to
- // deal in the Software without restriction, including without limitation the
- // rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
- // sell copies of the Software, and to permit persons to whom the Software is
- // furnished to do so, subject to the following conditions:
- //
- // The above copyright notice and this permission notice shall be included in
- // all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- // AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
- // ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
- // WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
- // when used in node, this will actually load the util module we depend on
- // versus loading the builtin util module as happens otherwise
- // this is a bug in node module loading as far as I am concerned
- var util = require('util/');
- var pSlice = Array.prototype.slice;
- var hasOwn = Object.prototype.hasOwnProperty;
- // 1. The assert module provides functions that throw
- // AssertionError's when particular conditions are not met. The
- // assert module must conform to the following interface.
- var assert = module.exports = ok;
- // 2. The AssertionError is defined in assert.
- // new assert.AssertionError({ message: message,
- // actual: actual,
- // expected: expected })
- assert.AssertionError = function AssertionError(options) {
- this.name = 'AssertionError';
- this.actual = options.actual;
- this.expected = options.expected;
- this.operator = options.operator;
- if (options.message) {
- this.message = options.message;
- this.generatedMessage = false;
- } else {
- this.message = getMessage(this);
- this.generatedMessage = true;
- }
- var stackStartFunction = options.stackStartFunction || fail;
- if (Error.captureStackTrace) {
- Error.captureStackTrace(this, stackStartFunction);
- }
- else {
- // non v8 browsers so we can have a stacktrace
- var err = new Error();
- if (err.stack) {
- var out = err.stack;
- // try to strip useless frames
- var fn_name = stackStartFunction.name;
- var idx = out.indexOf('\n' + fn_name);
- if (idx >= 0) {
- // once we have located the function frame
- // we need to strip out everything before it (and its line)
- var next_line = out.indexOf('\n', idx + 1);
- out = out.substring(next_line + 1);
- }
- this.stack = out;
- }
- }
- };
- // assert.AssertionError instanceof Error
- util.inherits(assert.AssertionError, Error);
- function replacer(key, value) {
- if (util.isUndefined(value)) {
- return '' + value;
- }
- if (util.isNumber(value) && !isFinite(value)) {
- return value.toString();
- }
- if (util.isFunction(value) || util.isRegExp(value)) {
- return value.toString();
- }
- return value;
- }
- function truncate(s, n) {
- if (util.isString(s)) {
- return s.length < n ? s : s.slice(0, n);
- } else {
- return s;
- }
- }
- function getMessage(self) {
- return truncate(JSON.stringify(self.actual, replacer), 128) + ' ' +
- self.operator + ' ' +
- truncate(JSON.stringify(self.expected, replacer), 128);
- }
- // At present only the three keys mentioned above are used and
- // understood by the spec. Implementations or sub modules can pass
- // other keys to the AssertionError's constructor - they will be
- // ignored.
- // 3. All of the following functions must throw an AssertionError
- // when a corresponding condition is not met, with a message that
- // may be undefined if not provided. All assertion methods provide
- // both the actual and expected values to the assertion error for
- // display purposes.
- function fail(actual, expected, message, operator, stackStartFunction) {
- throw new assert.AssertionError({
- message: message,
- actual: actual,
- expected: expected,
- operator: operator,
- stackStartFunction: stackStartFunction
- });
- }
- // EXTENSION! allows for well behaved errors defined elsewhere.
- assert.fail = fail;
- // 4. Pure assertion tests whether a value is truthy, as determined
- // by !!guard.
- // assert.ok(guard, message_opt);
- // This statement is equivalent to assert.equal(true, !!guard,
- // message_opt);. To test strictly for the value true, use
- // assert.strictEqual(true, guard, message_opt);.
- function ok(value, message) {
- if (!value) fail(value, true, message, '==', assert.ok);
- }
- assert.ok = ok;
- // 5. The equality assertion tests shallow, coercive equality with
- // ==.
- // assert.equal(actual, expected, message_opt);
- assert.equal = function equal(actual, expected, message) {
- if (actual != expected) fail(actual, expected, message, '==', assert.equal);
- };
- // 6. The non-equality assertion tests for whether two objects are not equal
- // with != assert.notEqual(actual, expected, message_opt);
- assert.notEqual = function notEqual(actual, expected, message) {
- if (actual == expected) {
- fail(actual, expected, message, '!=', assert.notEqual);
- }
- };
- // 7. The equivalence assertion tests a deep equality relation.
- // assert.deepEqual(actual, expected, message_opt);
- assert.deepEqual = function deepEqual(actual, expected, message) {
- if (!_deepEqual(actual, expected)) {
- fail(actual, expected, message, 'deepEqual', assert.deepEqual);
- }
- };
- function _deepEqual(actual, expected) {
- // 7.1. All identical values are equivalent, as determined by ===.
- if (actual === expected) {
- return true;
- } else if (util.isBuffer(actual) && util.isBuffer(expected)) {
- if (actual.length != expected.length) return false;
- for (var i = 0; i < actual.length; i++) {
- if (actual[i] !== expected[i]) return false;
- }
- return true;
- // 7.2. If the expected value is a Date object, the actual value is
- // equivalent if it is also a Date object that refers to the same time.
- } else if (util.isDate(actual) && util.isDate(expected)) {
- return actual.getTime() === expected.getTime();
- // 7.3 If the expected value is a RegExp object, the actual value is
- // equivalent if it is also a RegExp object with the same source and
- // properties (`global`, `multiline`, `lastIndex`, `ignoreCase`).
- } else if (util.isRegExp(actual) && util.isRegExp(expected)) {
- return actual.source === expected.source &&
- actual.global === expected.global &&
- actual.multiline === expected.multiline &&
- actual.lastIndex === expected.lastIndex &&
- actual.ignoreCase === expected.ignoreCase;
- // 7.4. Other pairs that do not both pass typeof value == 'object',
- // equivalence is determined by ==.
- } else if (!util.isObject(actual) && !util.isObject(expected)) {
- return actual == expected;
- // 7.5 For all other Object pairs, including Array objects, equivalence is
- // determined by having the same number of owned properties (as verified
- // with Object.prototype.hasOwnProperty.call), the same set of keys
- // (although not necessarily the same order), equivalent values for every
- // corresponding key, and an identical 'prototype' property. Note: this
- // accounts for both named and indexed properties on Arrays.
- } else {
- return objEquiv(actual, expected);
- }
- }
- function isArguments(object) {
- return Object.prototype.toString.call(object) == '[object Arguments]';
- }
- function objEquiv(a, b) {
- if (util.isNullOrUndefined(a) || util.isNullOrUndefined(b))
- return false;
- // an identical 'prototype' property.
- if (a.prototype !== b.prototype) return false;
- // if one is a primitive, the other must be same
- if (util.isPrimitive(a) || util.isPrimitive(b)) {
- return a === b;
- }
- var aIsArgs = isArguments(a),
- bIsArgs = isArguments(b);
- if ((aIsArgs && !bIsArgs) || (!aIsArgs && bIsArgs))
- return false;
- if (aIsArgs) {
- a = pSlice.call(a);
- b = pSlice.call(b);
- return _deepEqual(a, b);
- }
- var ka = objectKeys(a),
- kb = objectKeys(b),
- key, i;
- // having the same number of owned properties (keys incorporates
- // hasOwnProperty)
- if (ka.length != kb.length)
- return false;
- //the same set of keys (although not necessarily the same order),
- ka.sort();
- kb.sort();
- //~~~cheap key test
- for (i = ka.length - 1; i >= 0; i--) {
- if (ka[i] != kb[i])
- return false;
- }
- //equivalent values for every corresponding key, and
- //~~~possibly expensive deep test
- for (i = ka.length - 1; i >= 0; i--) {
- key = ka[i];
- if (!_deepEqual(a[key], b[key])) return false;
- }
- return true;
- }
- // 8. The non-equivalence assertion tests for any deep inequality.
- // assert.notDeepEqual(actual, expected, message_opt);
- assert.notDeepEqual = function notDeepEqual(actual, expected, message) {
- if (_deepEqual(actual, expected)) {
- fail(actual, expected, message, 'notDeepEqual', assert.notDeepEqual);
- }
- };
- // 9. The strict equality assertion tests strict equality, as determined by ===.
- // assert.strictEqual(actual, expected, message_opt);
- assert.strictEqual = function strictEqual(actual, expected, message) {
- if (actual !== expected) {
- fail(actual, expected, message, '===', assert.strictEqual);
- }
- };
- // 10. The strict non-equality assertion tests for strict inequality, as
- // determined by !==. assert.notStrictEqual(actual, expected, message_opt);
- assert.notStrictEqual = function notStrictEqual(actual, expected, message) {
- if (actual === expected) {
- fail(actual, expected, message, '!==', assert.notStrictEqual);
- }
- };
- function expectedException(actual, expected) {
- if (!actual || !expected) {
- return false;
- }
- if (Object.prototype.toString.call(expected) == '[object RegExp]') {
- return expected.test(actual);
- } else if (actual instanceof expected) {
- return true;
- } else if (expected.call({}, actual) === true) {
- return true;
- }
- return false;
- }
- function _throws(shouldThrow, block, expected, message) {
- var actual;
- if (util.isString(expected)) {
- message = expected;
- expected = null;
- }
- try {
- block();
- } catch (e) {
- actual = e;
- }
- message = (expected && expected.name ? ' (' + expected.name + ').' : '.') +
- (message ? ' ' + message : '.');
- if (shouldThrow && !actual) {
- fail(actual, expected, 'Missing expected exception' + message);
- }
- if (!shouldThrow && expectedException(actual, expected)) {
- fail(actual, expected, 'Got unwanted exception' + message);
- }
- if ((shouldThrow && actual && expected &&
- !expectedException(actual, expected)) || (!shouldThrow && actual)) {
- throw actual;
- }
- }
- // 11. Expected to throw an error:
- // assert.throws(block, Error_opt, message_opt);
- assert.throws = function(block, /*optional*/error, /*optional*/message) {
- _throws.apply(this, [true].concat(pSlice.call(arguments)));
- };
- // EXTENSION! This is annoying to write outside this module.
- assert.doesNotThrow = function(block, /*optional*/message) {
- _throws.apply(this, [false].concat(pSlice.call(arguments)));
- };
- assert.ifError = function(err) { if (err) {throw err;}};
- var objectKeys = Object.keys || function (obj) {
- var keys = [];
- for (var key in obj) {
- if (hasOwn.call(obj, key)) keys.push(key);
- }
- return keys;
- };
- },{"util/":8}],6:[function(require,module,exports){
- if (typeof Object.create === 'function') {
- // implementation from standard node.js 'util' module
- module.exports = function inherits(ctor, superCtor) {
- ctor.super_ = superCtor
- ctor.prototype = Object.create(superCtor.prototype, {
- constructor: {
- value: ctor,
- enumerable: false,
- writable: true,
- configurable: true
- }
- });
- };
- } else {
- // old school shim for old browsers
- module.exports = function inherits(ctor, superCtor) {
- ctor.super_ = superCtor
- var TempCtor = function () {}
- TempCtor.prototype = superCtor.prototype
- ctor.prototype = new TempCtor()
- ctor.prototype.constructor = ctor
- }
- }
- },{}],7:[function(require,module,exports){
- module.exports = function isBuffer(arg) {
- return arg && typeof arg === 'object'
- && typeof arg.copy === 'function'
- && typeof arg.fill === 'function'
- && typeof arg.readUInt8 === 'function';
- }
- },{}],8:[function(require,module,exports){
- (function (process,global){
- // Copyright Joyent, Inc. and other Node contributors.
- //
- // Permission is hereby granted, free of charge, to any person obtaining a
- // copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to permit
- // persons to whom the Software is furnished to do so, subject to the
- // following conditions:
- //
- // The above copyright notice and this permission notice shall be included
- // in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
- // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- var formatRegExp = /%[sdj%]/g;
- exports.format = function(f) {
- if (!isString(f)) {
- var objects = [];
- for (var i = 0; i < arguments.length; i++) {
- objects.push(inspect(arguments[i]));
- }
- return objects.join(' ');
- }
- var i = 1;
- var args = arguments;
- var len = args.length;
- var str = String(f).replace(formatRegExp, function(x) {
- if (x === '%%') return '%';
- if (i >= len) return x;
- switch (x) {
- case '%s': return String(args[i++]);
- case '%d': return Number(args[i++]);
- case '%j':
- try {
- return JSON.stringify(args[i++]);
- } catch (_) {
- return '[Circular]';
- }
- default:
- return x;
- }
- });
- for (var x = args[i]; i < len; x = args[++i]) {
- if (isNull(x) || !isObject(x)) {
- str += ' ' + x;
- } else {
- str += ' ' + inspect(x);
- }
- }
- return str;
- };
- // Mark that a method should not be used.
- // Returns a modified function which warns once by default.
- // If --no-deprecation is set, then it is a no-op.
- exports.deprecate = function(fn, msg) {
- // Allow for deprecating things in the process of starting up.
- if (isUndefined(global.process)) {
- return function() {
- return exports.deprecate(fn, msg).apply(this, arguments);
- };
- }
- if (process.noDeprecation === true) {
- return fn;
- }
- var warned = false;
- function deprecated() {
- if (!warned) {
- if (process.throwDeprecation) {
- throw new Error(msg);
- } else if (process.traceDeprecation) {
- console.trace(msg);
- } else {
- console.error(msg);
- }
- warned = true;
- }
- return fn.apply(this, arguments);
- }
- return deprecated;
- };
- var debugs = {};
- var debugEnviron;
- exports.debuglog = function(set) {
- if (isUndefined(debugEnviron))
- debugEnviron = process.env.NODE_DEBUG || '';
- set = set.toUpperCase();
- if (!debugs[set]) {
- if (new RegExp('\\b' + set + '\\b', 'i').test(debugEnviron)) {
- var pid = process.pid;
- debugs[set] = function() {
- var msg = exports.format.apply(exports, arguments);
- console.error('%s %d: %s', set, pid, msg);
- };
- } else {
- debugs[set] = function() {};
- }
- }
- return debugs[set];
- };
- /**
- * Echos the value of a value. Trys to print the value out
- * in the best way possible given the different types.
- *
- * @param {Object} obj The object to print out.
- * @param {Object} opts Optional options object that alters the output.
- */
- /* legacy: obj, showHidden, depth, colors*/
- function inspect(obj, opts) {
- // default options
- var ctx = {
- seen: [],
- stylize: stylizeNoColor
- };
- // legacy...
- if (arguments.length >= 3) ctx.depth = arguments[2];
- if (arguments.length >= 4) ctx.colors = arguments[3];
- if (isBoolean(opts)) {
- // legacy...
- ctx.showHidden = opts;
- } else if (opts) {
- // got an "options" object
- exports._extend(ctx, opts);
- }
- // set default options
- if (isUndefined(ctx.showHidden)) ctx.showHidden = false;
- if (isUndefined(ctx.depth)) ctx.depth = 2;
- if (isUndefined(ctx.colors)) ctx.colors = false;
- if (isUndefined(ctx.customInspect)) ctx.customInspect = true;
- if (ctx.colors) ctx.stylize = stylizeWithColor;
- return formatValue(ctx, obj, ctx.depth);
- }
- exports.inspect = inspect;
- // http://en.wikipedia.org/wiki/ANSI_escape_code#graphics
- inspect.colors = {
- 'bold' : [1, 22],
- 'italic' : [3, 23],
- 'underline' : [4, 24],
- 'inverse' : [7, 27],
- 'white' : [37, 39],
- 'grey' : [90, 39],
- 'black' : [30, 39],
- 'blue' : [34, 39],
- 'cyan' : [36, 39],
- 'green' : [32, 39],
- 'magenta' : [35, 39],
- 'red' : [31, 39],
- 'yellow' : [33, 39]
- };
- // Don't use 'blue' not visible on cmd.exe
- inspect.styles = {
- 'special': 'cyan',
- 'number': 'yellow',
- 'boolean': 'yellow',
- 'undefined': 'grey',
- 'null': 'bold',
- 'string': 'green',
- 'date': 'magenta',
- // "name": intentionally not styling
- 'regexp': 'red'
- };
- function stylizeWithColor(str, styleType) {
- var style = inspect.styles[styleType];
- if (style) {
- return '\u001b[' + inspect.colors[style][0] + 'm' + str +
- '\u001b[' + inspect.colors[style][1] + 'm';
- } else {
- return str;
- }
- }
- function stylizeNoColor(str, styleType) {
- return str;
- }
- function arrayToHash(array) {
- var hash = {};
- array.forEach(function(val, idx) {
- hash[val] = true;
- });
- return hash;
- }
- function formatValue(ctx, value, recurseTimes) {
- // Provide a hook for user-specified inspect functions.
- // Check that value is an object with an inspect function on it
- if (ctx.customInspect &&
- value &&
- isFunction(value.inspect) &&
- // Filter out the util module, it's inspect function is special
- value.inspect !== exports.inspect &&
- // Also filter out any prototype objects using the circular check.
- !(value.constructor && value.constructor.prototype === value)) {
- var ret = value.inspect(recurseTimes, ctx);
- if (!isString(ret)) {
- ret = formatValue(ctx, ret, recurseTimes);
- }
- return ret;
- }
- // Primitive types cannot have properties
- var primitive = formatPrimitive(ctx, value);
- if (primitive) {
- return primitive;
- }
- // Look up the keys of the object.
- var keys = Object.keys(value);
- var visibleKeys = arrayToHash(keys);
- if (ctx.showHidden) {
- keys = Object.getOwnPropertyNames(value);
- }
- // IE doesn't make error fields non-enumerable
- // http://msdn.microsoft.com/en-us/library/ie/dww52sbt(v=vs.94).aspx
- if (isError(value)
- && (keys.indexOf('message') >= 0 || keys.indexOf('description') >= 0)) {
- return formatError(value);
- }
- // Some type of object without properties can be shortcutted.
- if (keys.length === 0) {
- if (isFunction(value)) {
- var name = value.name ? ': ' + value.name : '';
- return ctx.stylize('[Function' + name + ']', 'special');
- }
- if (isRegExp(value)) {
- return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
- }
- if (isDate(value)) {
- return ctx.stylize(Date.prototype.toString.call(value), 'date');
- }
- if (isError(value)) {
- return formatError(value);
- }
- }
- var base = '', array = false, braces = ['{', '}'];
- // Make Array say that they are Array
- if (isArray(value)) {
- array = true;
- braces = ['[', ']'];
- }
- // Make functions say that they are functions
- if (isFunction(value)) {
- var n = value.name ? ': ' + value.name : '';
- base = ' [Function' + n + ']';
- }
- // Make RegExps say that they are RegExps
- if (isRegExp(value)) {
- base = ' ' + RegExp.prototype.toString.call(value);
- }
- // Make dates with properties first say the date
- if (isDate(value)) {
- base = ' ' + Date.prototype.toUTCString.call(value);
- }
- // Make error with message first say the error
- if (isError(value)) {
- base = ' ' + formatError(value);
- }
- if (keys.length === 0 && (!array || value.length == 0)) {
- return braces[0] + base + braces[1];
- }
- if (recurseTimes < 0) {
- if (isRegExp(value)) {
- return ctx.stylize(RegExp.prototype.toString.call(value), 'regexp');
- } else {
- return ctx.stylize('[Object]', 'special');
- }
- }
- ctx.seen.push(value);
- var output;
- if (array) {
- output = formatArray(ctx, value, recurseTimes, visibleKeys, keys);
- } else {
- output = keys.map(function(key) {
- return formatProperty(ctx, value, recurseTimes, visibleKeys, key, array);
- });
- }
- ctx.seen.pop();
- return reduceToSingleString(output, base, braces);
- }
- function formatPrimitive(ctx, value) {
- if (isUndefined(value))
- return ctx.stylize('undefined', 'undefined');
- if (isString(value)) {
- var simple = '\'' + JSON.stringify(value).replace(/^"|"$/g, '')
- .replace(/'/g, "\\'")
- .replace(/\\"/g, '"') + '\'';
- return ctx.stylize(simple, 'string');
- }
- if (isNumber(value))
- return ctx.stylize('' + value, 'number');
- if (isBoolean(value))
- return ctx.stylize('' + value, 'boolean');
- // For some reason typeof null is "object", so special case here.
- if (isNull(value))
- return ctx.stylize('null', 'null');
- }
- function formatError(value) {
- return '[' + Error.prototype.toString.call(value) + ']';
- }
- function formatArray(ctx, value, recurseTimes, visibleKeys, keys) {
- var output = [];
- for (var i = 0, l = value.length; i < l; ++i) {
- if (hasOwnProperty(value, String(i))) {
- output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
- String(i), true));
- } else {
- output.push('');
- }
- }
- keys.forEach(function(key) {
- if (!key.match(/^\d+$/)) {
- output.push(formatProperty(ctx, value, recurseTimes, visibleKeys,
- key, true));
- }
- });
- return output;
- }
- function formatProperty(ctx, value, recurseTimes, visibleKeys, key, array) {
- var name, str, desc;
- desc = Object.getOwnPropertyDescriptor(value, key) || { value: value[key] };
- if (desc.get) {
- if (desc.set) {
- str = ctx.stylize('[Getter/Setter]', 'special');
- } else {
- str = ctx.stylize('[Getter]', 'special');
- }
- } else {
- if (desc.set) {
- str = ctx.stylize('[Setter]', 'special');
- }
- }
- if (!hasOwnProperty(visibleKeys, key)) {
- name = '[' + key + ']';
- }
- if (!str) {
- if (ctx.seen.indexOf(desc.value) < 0) {
- if (isNull(recurseTimes)) {
- str = formatValue(ctx, desc.value, null);
- } else {
- str = formatValue(ctx, desc.value, recurseTimes - 1);
- }
- if (str.indexOf('\n') > -1) {
- if (array) {
- str = str.split('\n').map(function(line) {
- return ' ' + line;
- }).join('\n').substr(2);
- } else {
- str = '\n' + str.split('\n').map(function(line) {
- return ' ' + line;
- }).join('\n');
- }
- }
- } else {
- str = ctx.stylize('[Circular]', 'special');
- }
- }
- if (isUndefined(name)) {
- if (array && key.match(/^\d+$/)) {
- return str;
- }
- name = JSON.stringify('' + key);
- if (name.match(/^"([a-zA-Z_][a-zA-Z_0-9]*)"$/)) {
- name = name.substr(1, name.length - 2);
- name = ctx.stylize(name, 'name');
- } else {
- name = name.replace(/'/g, "\\'")
- .replace(/\\"/g, '"')
- .replace(/(^"|"$)/g, "'");
- name = ctx.stylize(name, 'string');
- }
- }
- return name + ': ' + str;
- }
- function reduceToSingleString(output, base, braces) {
- var numLinesEst = 0;
- var length = output.reduce(function(prev, cur) {
- numLinesEst++;
- if (cur.indexOf('\n') >= 0) numLinesEst++;
- return prev + cur.replace(/\u001b\[\d\d?m/g, '').length + 1;
- }, 0);
- if (length > 60) {
- return braces[0] +
- (base === '' ? '' : base + '\n ') +
- ' ' +
- output.join(',\n ') +
- ' ' +
- braces[1];
- }
- return braces[0] + base + ' ' + output.join(', ') + ' ' + braces[1];
- }
- // NOTE: These type checking functions intentionally don't use `instanceof`
- // because it is fragile and can be easily faked with `Object.create()`.
- function isArray(ar) {
- return Array.isArray(ar);
- }
- exports.isArray = isArray;
- function isBoolean(arg) {
- return typeof arg === 'boolean';
- }
- exports.isBoolean = isBoolean;
- function isNull(arg) {
- return arg === null;
- }
- exports.isNull = isNull;
- function isNullOrUndefined(arg) {
- return arg == null;
- }
- exports.isNullOrUndefined = isNullOrUndefined;
- function isNumber(arg) {
- return typeof arg === 'number';
- }
- exports.isNumber = isNumber;
- function isString(arg) {
- return typeof arg === 'string';
- }
- exports.isString = isString;
- function isSymbol(arg) {
- return typeof arg === 'symbol';
- }
- exports.isSymbol = isSymbol;
- function isUndefined(arg) {
- return arg === void 0;
- }
- exports.isUndefined = isUndefined;
- function isRegExp(re) {
- return isObject(re) && objectToString(re) === '[object RegExp]';
- }
- exports.isRegExp = isRegExp;
- function isObject(arg) {
- return typeof arg === 'object' && arg !== null;
- }
- exports.isObject = isObject;
- function isDate(d) {
- return isObject(d) && objectToString(d) === '[object Date]';
- }
- exports.isDate = isDate;
- function isError(e) {
- return isObject(e) &&
- (objectToString(e) === '[object Error]' || e instanceof Error);
- }
- exports.isError = isError;
- function isFunction(arg) {
- return typeof arg === 'function';
- }
- exports.isFunction = isFunction;
- function isPrimitive(arg) {
- return arg === null ||
- typeof arg === 'boolean' ||
- typeof arg === 'number' ||
- typeof arg === 'string' ||
- typeof arg === 'symbol' || // ES6 symbol
- typeof arg === 'undefined';
- }
- exports.isPrimitive = isPrimitive;
- exports.isBuffer = require('./support/isBuffer');
- function objectToString(o) {
- return Object.prototype.toString.call(o);
- }
- function pad(n) {
- return n < 10 ? '0' + n.toString(10) : n.toString(10);
- }
- var months = ['Jan', 'Feb', 'Mar', 'Apr', 'May', 'Jun', 'Jul', 'Aug', 'Sep',
- 'Oct', 'Nov', 'Dec'];
- // 26 Feb 16:19:34
- function timestamp() {
- var d = new Date();
- var time = [pad(d.getHours()),
- pad(d.getMinutes()),
- pad(d.getSeconds())].join(':');
- return [d.getDate(), months[d.getMonth()], time].join(' ');
- }
- // log is just a thin wrapper to console.log that prepends a timestamp
- exports.log = function() {
- console.log('%s - %s', timestamp(), exports.format.apply(exports, arguments));
- };
- /**
- * Inherit the prototype methods from one constructor into another.
- *
- * The Function.prototype.inherits from lang.js rewritten as a standalone
- * function (not on Function.prototype). NOTE: If this file is to be loaded
- * during bootstrapping this function needs to be rewritten using some native
- * functions as prototype setup using normal JavaScript does not work as
- * expected during bootstrapping (see mirror.js in r114903).
- *
- * @param {function} ctor Constructor function which needs to inherit the
- * prototype.
- * @param {function} superCtor Constructor function to inherit prototype from.
- */
- exports.inherits = require('inherits');
- exports._extend = function(origin, add) {
- // Don't do anything if add isn't an object
- if (!add || !isObject(add)) return origin;
- var keys = Object.keys(add);
- var i = keys.length;
- while (i--) {
- origin[keys[i]] = add[keys[i]];
- }
- return origin;
- };
- function hasOwnProperty(obj, prop) {
- return Object.prototype.hasOwnProperty.call(obj, prop);
- }
- }).call(this,require('_process'),typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"./support/isBuffer":7,"_process":13,"inherits":6}],9:[function(require,module,exports){
- (function (global){
- /*global window, global*/
- var util = require("util")
- var assert = require("assert")
- var now = require("date-now")
- var slice = Array.prototype.slice
- var console
- var times = {}
- if (typeof global !== "undefined" && global.console) {
- console = global.console
- } else if (typeof window !== "undefined" && window.console) {
- console = window.console
- } else {
- console = {}
- }
- var functions = [
- [log, "log"],
- [info, "info"],
- [warn, "warn"],
- [error, "error"],
- [time, "time"],
- [timeEnd, "timeEnd"],
- [trace, "trace"],
- [dir, "dir"],
- [consoleAssert, "assert"]
- ]
- for (var i = 0; i < functions.length; i++) {
- var tuple = functions[i]
- var f = tuple[0]
- var name = tuple[1]
- if (!console[name]) {
- console[name] = f
- }
- }
- module.exports = console
- function log() {}
- function info() {
- console.log.apply(console, arguments)
- }
- function warn() {
- console.log.apply(console, arguments)
- }
- function error() {
- console.warn.apply(console, arguments)
- }
- function time(label) {
- times[label] = now()
- }
- function timeEnd(label) {
- var time = times[label]
- if (!time) {
- throw new Error("No such label: " + label)
- }
- var duration = now() - time
- console.log(label + ": " + duration + "ms")
- }
- function trace() {
- var err = new Error()
- err.name = "Trace"
- err.message = util.format.apply(null, arguments)
- console.error(err.stack)
- }
- function dir(object) {
- console.log(util.inspect(object) + "\n")
- }
- function consoleAssert(expression) {
- if (!expression) {
- var arr = slice.call(arguments, 1)
- assert.ok(false, util.format.apply(null, arr))
- }
- }
- }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{"assert":5,"date-now":10,"util":16}],10:[function(require,module,exports){
- module.exports = now
- function now() {
- return new Date().getTime()
- }
- },{}],11:[function(require,module,exports){
- // Copyright Joyent, Inc. and other Node contributors.
- //
- // Permission is hereby granted, free of charge, to any person obtaining a
- // copy of this software and associated documentation files (the
- // "Software"), to deal in the Software without restriction, including
- // without limitation the rights to use, copy, modify, merge, publish,
- // distribute, sublicense, and/or sell copies of the Software, and to permit
- // persons to whom the Software is furnished to do so, subject to the
- // following conditions:
- //
- // The above copyright notice and this permission notice shall be included
- // in all copies or substantial portions of the Software.
- //
- // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- // MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
- // NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
- // DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
- // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
- // USE OR OTHER DEALINGS IN THE SOFTWARE.
- function EventEmitter() {
- this._events = this._events || {};
- this._maxListeners = this._maxListeners || undefined;
- }
- module.exports = EventEmitter;
- // Backwards-compat with node 0.10.x
- EventEmitter.EventEmitter = EventEmitter;
- EventEmitter.prototype._events = undefined;
- EventEmitter.prototype._maxListeners = undefined;
- // By default EventEmitters will print a warning if more than 10 listeners are
- // added to it. This is a useful default which helps finding memory leaks.
- EventEmitter.defaultMaxListeners = 10;
- // Obviously not all Emitters should be limited to 10. This function allows
- // that to be increased. Set to zero for unlimited.
- EventEmitter.prototype.setMaxListeners = function(n) {
- if (!isNumber(n) || n < 0 || isNaN(n))
- throw TypeError('n must be a positive number');
- this._maxListeners = n;
- return this;
- };
- EventEmitter.prototype.emit = function(type) {
- var er, handler, len, args, i, listeners;
- if (!this._events)
- this._events = {};
- // If there is no 'error' event listener then throw.
- if (type === 'error') {
- if (!this._events.error ||
- (isObject(this._events.error) && !this._events.error.length)) {
- er = arguments[1];
- if (er instanceof Error) {
- throw er; // Unhandled 'error' event
- }
- throw TypeError('Uncaught, unspecified "error" event.');
- }
- }
- handler = this._events[type];
- if (isUndefined(handler))
- return false;
- if (isFunction(handler)) {
- switch (arguments.length) {
- // fast cases
- case 1:
- handler.call(this);
- break;
- case 2:
- handler.call(this, arguments[1]);
- break;
- case 3:
- handler.call(this, arguments[1], arguments[2]);
- break;
- // slower
- default:
- len = arguments.length;
- args = new Array(len - 1);
- for (i = 1; i < len; i++)
- args[i - 1] = arguments[i];
- handler.apply(this, args);
- }
- } else if (isObject(handler)) {
- len = arguments.length;
- args = new Array(len - 1);
- for (i = 1; i < len; i++)
- args[i - 1] = arguments[i];
- listeners = handler.slice();
- len = listeners.length;
- for (i = 0; i < len; i++)
- listeners[i].apply(this, args);
- }
- return true;
- };
- EventEmitter.prototype.addListener = function(type, listener) {
- var m;
- if (!isFunction(listener))
- throw TypeError('listener must be a function');
- if (!this._events)
- this._events = {};
- // To avoid recursion in the case that type === "newListener"! Before
- // adding it to the listeners, first emit "newListener".
- if (this._events.newListener)
- this.emit('newListener', type,
- isFunction(listener.listener) ?
- listener.listener : listener);
- if (!this._events[type])
- // Optimize the case of one listener. Don't need the extra array object.
- this._events[type] = listener;
- else if (isObject(this._events[type]))
- // If we've already got an array, just append.
- this._events[type].push(listener);
- else
- // Adding the second element, need to change to array.
- this._events[type] = [this._events[type], listener];
- // Check for listener leak
- if (isObject(this._events[type]) && !this._events[type].warned) {
- var m;
- if (!isUndefined(this._maxListeners)) {
- m = this._maxListeners;
- } else {
- m = EventEmitter.defaultMaxListeners;
- }
- if (m && m > 0 && this._events[type].length > m) {
- this._events[type].warned = true;
- console.error('(node) warning: possible EventEmitter memory ' +
- 'leak detected. %d listeners added. ' +
- 'Use emitter.setMaxListeners() to increase limit.',
- this._events[type].length);
- if (typeof console.trace === 'function') {
- // not supported in IE 10
- console.trace();
- }
- }
- }
- return this;
- };
- EventEmitter.prototype.on = EventEmitter.prototype.addListener;
- EventEmitter.prototype.once = function(type, listener) {
- if (!isFunction(listener))
- throw TypeError('listener must be a function');
- var fired = false;
- function g() {
- this.removeListener(type, g);
- if (!fired) {
- fired = true;
- listener.apply(this, arguments);
- }
- }
- g.listener = listener;
- this.on(type, g);
- return this;
- };
- // emits a 'removeListener' event iff the listener was removed
- EventEmitter.prototype.removeListener = function(type, listener) {
- var list, position, length, i;
- if (!isFunction(listener))
- throw TypeError('listener must be a function');
- if (!this._events || !this._events[type])
- return this;
- list = this._events[type];
- length = list.length;
- position = -1;
- if (list === listener ||
- (isFunction(list.listener) && list.listener === listener)) {
- delete this._events[type];
- if (this._events.removeListener)
- this.emit('removeListener', type, listener);
- } else if (isObject(list)) {
- for (i = length; i-- > 0;) {
- if (list[i] === listener ||
- (list[i].listener && list[i].listener === listener)) {
- position = i;
- break;
- }
- }
- if (position < 0)
- return this;
- if (list.length === 1) {
- list.length = 0;
- delete this._events[type];
- } else {
- list.splice(position, 1);
- }
- if (this._events.removeListener)
- this.emit('removeListener', type, listener);
- }
- return this;
- };
- EventEmitter.prototype.removeAllListeners = function(type) {
- var key, listeners;
- if (!this._events)
- return this;
- // not listening for removeListener, no need to emit
- if (!this._events.removeListener) {
- if (arguments.length === 0)
- this._events = {};
- else if (this._events[type])
- delete this._events[type];
- return this;
- }
- // emit removeListener for all listeners on all events
- if (arguments.length === 0) {
- for (key in this._events) {
- if (key === 'removeListener') continue;
- this.removeAllListeners(key);
- }
- this.removeAllListeners('removeListener');
- this._events = {};
- return this;
- }
- listeners = this._events[type];
- if (isFunction(listeners)) {
- this.removeListener(type, listeners);
- } else {
- // LIFO order
- while (listeners.length)
- this.removeListener(type, listeners[listeners.length - 1]);
- }
- delete this._events[type];
- return this;
- };
- EventEmitter.prototype.listeners = function(type) {
- var ret;
- if (!this._events || !this._events[type])
- ret = [];
- else if (isFunction(this._events[type]))
- ret = [this._events[type]];
- else
- ret = this._events[type].slice();
- return ret;
- };
- EventEmitter.listenerCount = function(emitter, type) {
- var ret;
- if (!emitter._events || !emitter._events[type])
- ret = 0;
- else if (isFunction(emitter._events[type]))
- ret = 1;
- else
- ret = emitter._events[type].length;
- return ret;
- };
- function isFunction(arg) {
- return typeof arg === 'function';
- }
- function isNumber(arg) {
- return typeof arg === 'number';
- }
- function isObject(arg) {
- return typeof arg === 'object' && arg !== null;
- }
- function isUndefined(arg) {
- return arg === void 0;
- }
- },{}],12:[function(require,module,exports){
- (function (global){
- /**
- * @license
- * Lodash <https://lodash.com/>
- * Copyright OpenJS Foundation and other contributors <https://openjsf.org/>
- * Released under MIT license <https://lodash.com/license>
- * Based on Underscore.js 1.8.3 <http://underscorejs.org/LICENSE>
- * Copyright Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
- */
- ;(function() {
- /** Used as a safe reference for `undefined` in pre-ES5 environments. */
- var undefined;
- /** Used as the semantic version number. */
- var VERSION = '4.17.20';
- /** Used as the size to enable large array optimizations. */
- var LARGE_ARRAY_SIZE = 200;
- /** Error message constants. */
- var CORE_ERROR_TEXT = 'Unsupported core-js use. Try https://npms.io/search?q=ponyfill.',
- FUNC_ERROR_TEXT = 'Expected a function';
- /** Used to stand-in for `undefined` hash values. */
- var HASH_UNDEFINED = '__lodash_hash_undefined__';
- /** Used as the maximum memoize cache size. */
- var MAX_MEMOIZE_SIZE = 500;
- /** Used as the internal argument placeholder. */
- var PLACEHOLDER = '__lodash_placeholder__';
- /** Used to compose bitmasks for cloning. */
- var CLONE_DEEP_FLAG = 1,
- CLONE_FLAT_FLAG = 2,
- CLONE_SYMBOLS_FLAG = 4;
- /** Used to compose bitmasks for value comparisons. */
- var COMPARE_PARTIAL_FLAG = 1,
- COMPARE_UNORDERED_FLAG = 2;
- /** Used to compose bitmasks for function metadata. */
- var WRAP_BIND_FLAG = 1,
- WRAP_BIND_KEY_FLAG = 2,
- WRAP_CURRY_BOUND_FLAG = 4,
- WRAP_CURRY_FLAG = 8,
- WRAP_CURRY_RIGHT_FLAG = 16,
- WRAP_PARTIAL_FLAG = 32,
- WRAP_PARTIAL_RIGHT_FLAG = 64,
- WRAP_ARY_FLAG = 128,
- WRAP_REARG_FLAG = 256,
- WRAP_FLIP_FLAG = 512;
- /** Used as default options for `_.truncate`. */
- var DEFAULT_TRUNC_LENGTH = 30,
- DEFAULT_TRUNC_OMISSION = '...';
- /** Used to detect hot functions by number of calls within a span of milliseconds. */
- var HOT_COUNT = 800,
- HOT_SPAN = 16;
- /** Used to indicate the type of lazy iteratees. */
- var LAZY_FILTER_FLAG = 1,
- LAZY_MAP_FLAG = 2,
- LAZY_WHILE_FLAG = 3;
- /** Used as references for various `Number` constants. */
- var INFINITY = 1 / 0,
- MAX_SAFE_INTEGER = 9007199254740991,
- MAX_INTEGER = 1.7976931348623157e+308,
- NAN = 0 / 0;
- /** Used as references for the maximum length and index of an array. */
- var MAX_ARRAY_LENGTH = 4294967295,
- MAX_ARRAY_INDEX = MAX_ARRAY_LENGTH - 1,
- HALF_MAX_ARRAY_LENGTH = MAX_ARRAY_LENGTH >>> 1;
- /** Used to associate wrap methods with their bit flags. */
- var wrapFlags = [
- ['ary', WRAP_ARY_FLAG],
- ['bind', WRAP_BIND_FLAG],
- ['bindKey', WRAP_BIND_KEY_FLAG],
- ['curry', WRAP_CURRY_FLAG],
- ['curryRight', WRAP_CURRY_RIGHT_FLAG],
- ['flip', WRAP_FLIP_FLAG],
- ['partial', WRAP_PARTIAL_FLAG],
- ['partialRight', WRAP_PARTIAL_RIGHT_FLAG],
- ['rearg', WRAP_REARG_FLAG]
- ];
- /** `Object#toString` result references. */
- var argsTag = '[object Arguments]',
- arrayTag = '[object Array]',
- asyncTag = '[object AsyncFunction]',
- boolTag = '[object Boolean]',
- dateTag = '[object Date]',
- domExcTag = '[object DOMException]',
- errorTag = '[object Error]',
- funcTag = '[object Function]',
- genTag = '[object GeneratorFunction]',
- mapTag = '[object Map]',
- numberTag = '[object Number]',
- nullTag = '[object Null]',
- objectTag = '[object Object]',
- promiseTag = '[object Promise]',
- proxyTag = '[object Proxy]',
- regexpTag = '[object RegExp]',
- setTag = '[object Set]',
- stringTag = '[object String]',
- symbolTag = '[object Symbol]',
- undefinedTag = '[object Undefined]',
- weakMapTag = '[object WeakMap]',
- weakSetTag = '[object WeakSet]';
- var arrayBufferTag = '[object ArrayBuffer]',
- dataViewTag = '[object DataView]',
- float32Tag = '[object Float32Array]',
- float64Tag = '[object Float64Array]',
- int8Tag = '[object Int8Array]',
- int16Tag = '[object Int16Array]',
- int32Tag = '[object Int32Array]',
- uint8Tag = '[object Uint8Array]',
- uint8ClampedTag = '[object Uint8ClampedArray]',
- uint16Tag = '[object Uint16Array]',
- uint32Tag = '[object Uint32Array]';
- /** Used to match empty string literals in compiled template source. */
- var reEmptyStringLeading = /\b__p \+= '';/g,
- reEmptyStringMiddle = /\b(__p \+=) '' \+/g,
- reEmptyStringTrailing = /(__e\(.*?\)|\b__t\)) \+\n'';/g;
- /** Used to match HTML entities and HTML characters. */
- var reEscapedHtml = /&(?:amp|lt|gt|quot|#39);/g,
- reUnescapedHtml = /[&<>"']/g,
- reHasEscapedHtml = RegExp(reEscapedHtml.source),
- reHasUnescapedHtml = RegExp(reUnescapedHtml.source);
- /** Used to match template delimiters. */
- var reEscape = /<%-([\s\S]+?)%>/g,
- reEvaluate = /<%([\s\S]+?)%>/g,
- reInterpolate = /<%=([\s\S]+?)%>/g;
- /** Used to match property names within property paths. */
- var reIsDeepProp = /\.|\[(?:[^[\]]*|(["'])(?:(?!\1)[^\\]|\\.)*?\1)\]/,
- reIsPlainProp = /^\w*$/,
- rePropName = /[^.[\]]+|\[(?:(-?\d+(?:\.\d+)?)|(["'])((?:(?!\2)[^\\]|\\.)*?)\2)\]|(?=(?:\.|\[\])(?:\.|\[\]|$))/g;
- /**
- * Used to match `RegExp`
- * [syntax characters](http://ecma-international.org/ecma-262/7.0/#sec-patterns).
- */
- var reRegExpChar = /[\\^$.*+?()[\]{}|]/g,
- reHasRegExpChar = RegExp(reRegExpChar.source);
- /** Used to match leading and trailing whitespace. */
- var reTrim = /^\s+|\s+$/g,
- reTrimStart = /^\s+/,
- reTrimEnd = /\s+$/;
- /** Used to match wrap detail comments. */
- var reWrapComment = /\{(?:\n\/\* \[wrapped with .+\] \*\/)?\n?/,
- reWrapDetails = /\{\n\/\* \[wrapped with (.+)\] \*/,
- reSplitDetails = /,? & /;
- /** Used to match words composed of alphanumeric characters. */
- var reAsciiWord = /[^\x00-\x2f\x3a-\x40\x5b-\x60\x7b-\x7f]+/g;
- /** Used to match backslashes in property paths. */
- var reEscapeChar = /\\(\\)?/g;
- /**
- * Used to match
- * [ES template delimiters](http://ecma-international.org/ecma-262/7.0/#sec-template-literal-lexical-components).
- */
- var reEsTemplate = /\$\{([^\\}]*(?:\\.[^\\}]*)*)\}/g;
- /** Used to match `RegExp` flags from their coerced string values. */
- var reFlags = /\w*$/;
- /** Used to detect bad signed hexadecimal string values. */
- var reIsBadHex = /^[-+]0x[0-9a-f]+$/i;
- /** Used to detect binary string values. */
- var reIsBinary = /^0b[01]+$/i;
- /** Used to detect host constructors (Safari). */
- var reIsHostCtor = /^\[object .+?Constructor\]$/;
- /** Used to detect octal string values. */
- var reIsOctal = /^0o[0-7]+$/i;
- /** Used to detect unsigned integer values. */
- var reIsUint = /^(?:0|[1-9]\d*)$/;
- /** Used to match Latin Unicode letters (excluding mathematical operators). */
- var reLatin = /[\xc0-\xd6\xd8-\xf6\xf8-\xff\u0100-\u017f]/g;
- /** Used to ensure capturing order of template delimiters. */
- var reNoMatch = /($^)/;
- /** Used to match unescaped characters in compiled string literals. */
- var reUnescapedString = /['\n\r\u2028\u2029\\]/g;
- /** Used to compose unicode character classes. */
- var rsAstralRange = '\\ud800-\\udfff',
- rsComboMarksRange = '\\u0300-\\u036f',
- reComboHalfMarksRange = '\\ufe20-\\ufe2f',
- rsComboSymbolsRange = '\\u20d0-\\u20ff',
- rsComboRange = rsComboMarksRange + reComboHalfMarksRange + rsComboSymbolsRange,
- rsDingbatRange = '\\u2700-\\u27bf',
- rsLowerRange = 'a-z\\xdf-\\xf6\\xf8-\\xff',
- rsMathOpRange = '\\xac\\xb1\\xd7\\xf7',
- rsNonCharRange = '\\x00-\\x2f\\x3a-\\x40\\x5b-\\x60\\x7b-\\xbf',
- rsPunctuationRange = '\\u2000-\\u206f',
- rsSpaceRange = ' \\t\\x0b\\f\\xa0\\ufeff\\n\\r\\u2028\\u2029\\u1680\\u180e\\u2000\\u2001\\u2002\\u2003\\u2004\\u2005\\u2006\\u2007\\u2008\\u2009\\u200a\\u202f\\u205f\\u3000',
- rsUpperRange = 'A-Z\\xc0-\\xd6\\xd8-\\xde',
- rsVarRange = '\\ufe0e\\ufe0f',
- rsBreakRange = rsMathOpRange + rsNonCharRange + rsPunctuationRange + rsSpaceRange;
- /** Used to compose unicode capture groups. */
- var rsApos = "['\u2019]",
- rsAstral = '[' + rsAstralRange + ']',
- rsBreak = '[' + rsBreakRange + ']',
- rsCombo = '[' + rsComboRange + ']',
- rsDigits = '\\d+',
- rsDingbat = '[' + rsDingbatRange + ']',
- rsLower = '[' + rsLowerRange + ']',
- rsMisc = '[^' + rsAstralRange + rsBreakRange + rsDigits + rsDingbatRange + rsLowerRange + rsUpperRange + ']',
- rsFitz = '\\ud83c[\\udffb-\\udfff]',
- rsModifier = '(?:' + rsCombo + '|' + rsFitz + ')',
- rsNonAstral = '[^' + rsAstralRange + ']',
- rsRegional = '(?:\\ud83c[\\udde6-\\uddff]){2}',
- rsSurrPair = '[\\ud800-\\udbff][\\udc00-\\udfff]',
- rsUpper = '[' + rsUpperRange + ']',
- rsZWJ = '\\u200d';
- /** Used to compose unicode regexes. */
- var rsMiscLower = '(?:' + rsLower + '|' + rsMisc + ')',
- rsMiscUpper = '(?:' + rsUpper + '|' + rsMisc + ')',
- rsOptContrLower = '(?:' + rsApos + '(?:d|ll|m|re|s|t|ve))?',
- rsOptContrUpper = '(?:' + rsApos + '(?:D|LL|M|RE|S|T|VE))?',
- reOptMod = rsModifier + '?',
- rsOptVar = '[' + rsVarRange + ']?',
- rsOptJoin = '(?:' + rsZWJ + '(?:' + [rsNonAstral, rsRegional, rsSurrPair].join('|') + ')' + rsOptVar + reOptMod + ')*',
- rsOrdLower = '\\d*(?:1st|2nd|3rd|(?![123])\\dth)(?=\\b|[A-Z_])',
- rsOrdUpper = '\\d*(?:1ST|2ND|3RD|(?![123])\\dTH)(?=\\b|[a-z_])',
- rsSeq = rsOptVar + reOptMod + rsOptJoin,
- rsEmoji = '(?:' + [rsDingbat, rsRegional, rsSurrPair].join('|') + ')' + rsSeq,
- rsSymbol = '(?:' + [rsNonAstral + rsCombo + '?', rsCombo, rsRegional, rsSurrPair, rsAstral].join('|') + ')';
- /** Used to match apostrophes. */
- var reApos = RegExp(rsApos, 'g');
- /**
- * Used to match [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks) and
- * [combining diacritical marks for symbols](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks_for_Symbols).
- */
- var reComboMark = RegExp(rsCombo, 'g');
- /** Used to match [string symbols](https://mathiasbynens.be/notes/javascript-unicode). */
- var reUnicode = RegExp(rsFitz + '(?=' + rsFitz + ')|' + rsSymbol + rsSeq, 'g');
- /** Used to match complex or compound words. */
- var reUnicodeWord = RegExp([
- rsUpper + '?' + rsLower + '+' + rsOptContrLower + '(?=' + [rsBreak, rsUpper, '$'].join('|') + ')',
- rsMiscUpper + '+' + rsOptContrUpper + '(?=' + [rsBreak, rsUpper + rsMiscLower, '$'].join('|') + ')',
- rsUpper + '?' + rsMiscLower + '+' + rsOptContrLower,
- rsUpper + '+' + rsOptContrUpper,
- rsOrdUpper,
- rsOrdLower,
- rsDigits,
- rsEmoji
- ].join('|'), 'g');
- /** Used to detect strings with [zero-width joiners or code points from the astral planes](http://eev.ee/blog/2015/09/12/dark-corners-of-unicode/). */
- var reHasUnicode = RegExp('[' + rsZWJ + rsAstralRange + rsComboRange + rsVarRange + ']');
- /** Used to detect strings that need a more robust regexp to match words. */
- var reHasUnicodeWord = /[a-z][A-Z]|[A-Z]{2}[a-z]|[0-9][a-zA-Z]|[a-zA-Z][0-9]|[^a-zA-Z0-9 ]/;
- /** Used to assign default `context` object properties. */
- var contextProps = [
- 'Array', 'Buffer', 'DataView', 'Date', 'Error', 'Float32Array', 'Float64Array',
- 'Function', 'Int8Array', 'Int16Array', 'Int32Array', 'Map', 'Math', 'Object',
- 'Promise', 'RegExp', 'Set', 'String', 'Symbol', 'TypeError', 'Uint8Array',
- 'Uint8ClampedArray', 'Uint16Array', 'Uint32Array', 'WeakMap',
- '_', 'clearTimeout', 'isFinite', 'parseInt', 'setTimeout'
- ];
- /** Used to make template sourceURLs easier to identify. */
- var templateCounter = -1;
- /** Used to identify `toStringTag` values of typed arrays. */
- var typedArrayTags = {};
- typedArrayTags[float32Tag] = typedArrayTags[float64Tag] =
- typedArrayTags[int8Tag] = typedArrayTags[int16Tag] =
- typedArrayTags[int32Tag] = typedArrayTags[uint8Tag] =
- typedArrayTags[uint8ClampedTag] = typedArrayTags[uint16Tag] =
- typedArrayTags[uint32Tag] = true;
- typedArrayTags[argsTag] = typedArrayTags[arrayTag] =
- typedArrayTags[arrayBufferTag] = typedArrayTags[boolTag] =
- typedArrayTags[dataViewTag] = typedArrayTags[dateTag] =
- typedArrayTags[errorTag] = typedArrayTags[funcTag] =
- typedArrayTags[mapTag] = typedArrayTags[numberTag] =
- typedArrayTags[objectTag] = typedArrayTags[regexpTag] =
- typedArrayTags[setTag] = typedArrayTags[stringTag] =
- typedArrayTags[weakMapTag] = false;
- /** Used to identify `toStringTag` values supported by `_.clone`. */
- var cloneableTags = {};
- cloneableTags[argsTag] = cloneableTags[arrayTag] =
- cloneableTags[arrayBufferTag] = cloneableTags[dataViewTag] =
- cloneableTags[boolTag] = cloneableTags[dateTag] =
- cloneableTags[float32Tag] = cloneableTags[float64Tag] =
- cloneableTags[int8Tag] = cloneableTags[int16Tag] =
- cloneableTags[int32Tag] = cloneableTags[mapTag] =
- cloneableTags[numberTag] = cloneableTags[objectTag] =
- cloneableTags[regexpTag] = cloneableTags[setTag] =
- cloneableTags[stringTag] = cloneableTags[symbolTag] =
- cloneableTags[uint8Tag] = cloneableTags[uint8ClampedTag] =
- cloneableTags[uint16Tag] = cloneableTags[uint32Tag] = true;
- cloneableTags[errorTag] = cloneableTags[funcTag] =
- cloneableTags[weakMapTag] = false;
- /** Used to map Latin Unicode letters to basic Latin letters. */
- var deburredLetters = {
- // Latin-1 Supplement block.
- '\xc0': 'A', '\xc1': 'A', '\xc2': 'A', '\xc3': 'A', '\xc4': 'A', '\xc5': 'A',
- '\xe0': 'a', '\xe1': 'a', '\xe2': 'a', '\xe3': 'a', '\xe4': 'a', '\xe5': 'a',
- '\xc7': 'C', '\xe7': 'c',
- '\xd0': 'D', '\xf0': 'd',
- '\xc8': 'E', '\xc9': 'E', '\xca': 'E', '\xcb': 'E',
- '\xe8': 'e', '\xe9': 'e', '\xea': 'e', '\xeb': 'e',
- '\xcc': 'I', '\xcd': 'I', '\xce': 'I', '\xcf': 'I',
- '\xec': 'i', '\xed': 'i', '\xee': 'i', '\xef': 'i',
- '\xd1': 'N', '\xf1': 'n',
- '\xd2': 'O', '\xd3': 'O', '\xd4': 'O', '\xd5': 'O', '\xd6': 'O', '\xd8': 'O',
- '\xf2': 'o', '\xf3': 'o', '\xf4': 'o', '\xf5': 'o', '\xf6': 'o', '\xf8': 'o',
- '\xd9': 'U', '\xda': 'U', '\xdb': 'U', '\xdc': 'U',
- '\xf9': 'u', '\xfa': 'u', '\xfb': 'u', '\xfc': 'u',
- '\xdd': 'Y', '\xfd': 'y', '\xff': 'y',
- '\xc6': 'Ae', '\xe6': 'ae',
- '\xde': 'Th', '\xfe': 'th',
- '\xdf': 'ss',
- // Latin Extended-A block.
- '\u0100': 'A', '\u0102': 'A', '\u0104': 'A',
- '\u0101': 'a', '\u0103': 'a', '\u0105': 'a',
- '\u0106': 'C', '\u0108': 'C', '\u010a': 'C', '\u010c': 'C',
- '\u0107': 'c', '\u0109': 'c', '\u010b': 'c', '\u010d': 'c',
- '\u010e': 'D', '\u0110': 'D', '\u010f': 'd', '\u0111': 'd',
- '\u0112': 'E', '\u0114': 'E', '\u0116': 'E', '\u0118': 'E', '\u011a': 'E',
- '\u0113': 'e', '\u0115': 'e', '\u0117': 'e', '\u0119': 'e', '\u011b': 'e',
- '\u011c': 'G', '\u011e': 'G', '\u0120': 'G', '\u0122': 'G',
- '\u011d': 'g', '\u011f': 'g', '\u0121': 'g', '\u0123': 'g',
- '\u0124': 'H', '\u0126': 'H', '\u0125': 'h', '\u0127': 'h',
- '\u0128': 'I', '\u012a': 'I', '\u012c': 'I', '\u012e': 'I', '\u0130': 'I',
- '\u0129': 'i', '\u012b': 'i', '\u012d': 'i', '\u012f': 'i', '\u0131': 'i',
- '\u0134': 'J', '\u0135': 'j',
- '\u0136': 'K', '\u0137': 'k', '\u0138': 'k',
- '\u0139': 'L', '\u013b': 'L', '\u013d': 'L', '\u013f': 'L', '\u0141': 'L',
- '\u013a': 'l', '\u013c': 'l', '\u013e': 'l', '\u0140': 'l', '\u0142': 'l',
- '\u0143': 'N', '\u0145': 'N', '\u0147': 'N', '\u014a': 'N',
- '\u0144': 'n', '\u0146': 'n', '\u0148': 'n', '\u014b': 'n',
- '\u014c': 'O', '\u014e': 'O', '\u0150': 'O',
- '\u014d': 'o', '\u014f': 'o', '\u0151': 'o',
- '\u0154': 'R', '\u0156': 'R', '\u0158': 'R',
- '\u0155': 'r', '\u0157': 'r', '\u0159': 'r',
- '\u015a': 'S', '\u015c': 'S', '\u015e': 'S', '\u0160': 'S',
- '\u015b': 's', '\u015d': 's', '\u015f': 's', '\u0161': 's',
- '\u0162': 'T', '\u0164': 'T', '\u0166': 'T',
- '\u0163': 't', '\u0165': 't', '\u0167': 't',
- '\u0168': 'U', '\u016a': 'U', '\u016c': 'U', '\u016e': 'U', '\u0170': 'U', '\u0172': 'U',
- '\u0169': 'u', '\u016b': 'u', '\u016d': 'u', '\u016f': 'u', '\u0171': 'u', '\u0173': 'u',
- '\u0174': 'W', '\u0175': 'w',
- '\u0176': 'Y', '\u0177': 'y', '\u0178': 'Y',
- '\u0179': 'Z', '\u017b': 'Z', '\u017d': 'Z',
- '\u017a': 'z', '\u017c': 'z', '\u017e': 'z',
- '\u0132': 'IJ', '\u0133': 'ij',
- '\u0152': 'Oe', '\u0153': 'oe',
- '\u0149': "'n", '\u017f': 's'
- };
- /** Used to map characters to HTML entities. */
- var htmlEscapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- "'": '''
- };
- /** Used to map HTML entities to characters. */
- var htmlUnescapes = {
- '&': '&',
- '<': '<',
- '>': '>',
- '"': '"',
- ''': "'"
- };
- /** Used to escape characters for inclusion in compiled string literals. */
- var stringEscapes = {
- '\\': '\\',
- "'": "'",
- '\n': 'n',
- '\r': 'r',
- '\u2028': 'u2028',
- '\u2029': 'u2029'
- };
- /** Built-in method references without a dependency on `root`. */
- var freeParseFloat = parseFloat,
- freeParseInt = parseInt;
- /** Detect free variable `global` from Node.js. */
- var freeGlobal = typeof global == 'object' && global && global.Object === Object && global;
- /** Detect free variable `self`. */
- var freeSelf = typeof self == 'object' && self && self.Object === Object && self;
- /** Used as a reference to the global object. */
- var root = freeGlobal || freeSelf || Function('return this')();
- /** Detect free variable `exports`. */
- var freeExports = typeof exports == 'object' && exports && !exports.nodeType && exports;
- /** Detect free variable `module`. */
- var freeModule = freeExports && typeof module == 'object' && module && !module.nodeType && module;
- /** Detect the popular CommonJS extension `module.exports`. */
- var moduleExports = freeModule && freeModule.exports === freeExports;
- /** Detect free variable `process` from Node.js. */
- var freeProcess = moduleExports && freeGlobal.process;
- /** Used to access faster Node.js helpers. */
- var nodeUtil = (function() {
- try {
- // Use `util.types` for Node.js 10+.
- var types = freeModule && freeModule.require && freeModule.require('util').types;
- if (types) {
- return types;
- }
- // Legacy `process.binding('util')` for Node.js < 10.
- return freeProcess && freeProcess.binding && freeProcess.binding('util');
- } catch (e) {}
- }());
- /* Node.js helper references. */
- var nodeIsArrayBuffer = nodeUtil && nodeUtil.isArrayBuffer,
- nodeIsDate = nodeUtil && nodeUtil.isDate,
- nodeIsMap = nodeUtil && nodeUtil.isMap,
- nodeIsRegExp = nodeUtil && nodeUtil.isRegExp,
- nodeIsSet = nodeUtil && nodeUtil.isSet,
- nodeIsTypedArray = nodeUtil && nodeUtil.isTypedArray;
- /*--------------------------------------------------------------------------*/
- /**
- * A faster alternative to `Function#apply`, this function invokes `func`
- * with the `this` binding of `thisArg` and the arguments of `args`.
- *
- * @private
- * @param {Function} func The function to invoke.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} args The arguments to invoke `func` with.
- * @returns {*} Returns the result of `func`.
- */
- function apply(func, thisArg, args) {
- switch (args.length) {
- case 0: return func.call(thisArg);
- case 1: return func.call(thisArg, args[0]);
- case 2: return func.call(thisArg, args[0], args[1]);
- case 3: return func.call(thisArg, args[0], args[1], args[2]);
- }
- return func.apply(thisArg, args);
- }
- /**
- * A specialized version of `baseAggregator` for arrays.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
- */
- function arrayAggregator(array, setter, iteratee, accumulator) {
- var index = -1,
- length = array == null ? 0 : array.length;
- while (++index < length) {
- var value = array[index];
- setter(accumulator, value, iteratee(value), array);
- }
- return accumulator;
- }
- /**
- * A specialized version of `_.forEach` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
- function arrayEach(array, iteratee) {
- var index = -1,
- length = array == null ? 0 : array.length;
- while (++index < length) {
- if (iteratee(array[index], index, array) === false) {
- break;
- }
- }
- return array;
- }
- /**
- * A specialized version of `_.forEachRight` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns `array`.
- */
- function arrayEachRight(array, iteratee) {
- var length = array == null ? 0 : array.length;
- while (length--) {
- if (iteratee(array[length], length, array) === false) {
- break;
- }
- }
- return array;
- }
- /**
- * A specialized version of `_.every` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`.
- */
- function arrayEvery(array, predicate) {
- var index = -1,
- length = array == null ? 0 : array.length;
- while (++index < length) {
- if (!predicate(array[index], index, array)) {
- return false;
- }
- }
- return true;
- }
- /**
- * A specialized version of `_.filter` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
- function arrayFilter(array, predicate) {
- var index = -1,
- length = array == null ? 0 : array.length,
- resIndex = 0,
- result = [];
- while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result[resIndex++] = value;
- }
- }
- return result;
- }
- /**
- * A specialized version of `_.includes` for arrays without support for
- * specifying an index to search from.
- *
- * @private
- * @param {Array} [array] The array to inspect.
- * @param {*} target The value to search for.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
- */
- function arrayIncludes(array, value) {
- var length = array == null ? 0 : array.length;
- return !!length && baseIndexOf(array, value, 0) > -1;
- }
- /**
- * This function is like `arrayIncludes` except that it accepts a comparator.
- *
- * @private
- * @param {Array} [array] The array to inspect.
- * @param {*} target The value to search for.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {boolean} Returns `true` if `target` is found, else `false`.
- */
- function arrayIncludesWith(array, value, comparator) {
- var index = -1,
- length = array == null ? 0 : array.length;
- while (++index < length) {
- if (comparator(value, array[index])) {
- return true;
- }
- }
- return false;
- }
- /**
- * A specialized version of `_.map` for arrays without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
- function arrayMap(array, iteratee) {
- var index = -1,
- length = array == null ? 0 : array.length,
- result = Array(length);
- while (++index < length) {
- result[index] = iteratee(array[index], index, array);
- }
- return result;
- }
- /**
- * Appends the elements of `values` to `array`.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to append.
- * @returns {Array} Returns `array`.
- */
- function arrayPush(array, values) {
- var index = -1,
- length = values.length,
- offset = array.length;
- while (++index < length) {
- array[offset + index] = values[index];
- }
- return array;
- }
- /**
- * A specialized version of `_.reduce` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the first element of `array` as
- * the initial value.
- * @returns {*} Returns the accumulated value.
- */
- function arrayReduce(array, iteratee, accumulator, initAccum) {
- var index = -1,
- length = array == null ? 0 : array.length;
- if (initAccum && length) {
- accumulator = array[++index];
- }
- while (++index < length) {
- accumulator = iteratee(accumulator, array[index], index, array);
- }
- return accumulator;
- }
- /**
- * A specialized version of `_.reduceRight` for arrays without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @param {boolean} [initAccum] Specify using the last element of `array` as
- * the initial value.
- * @returns {*} Returns the accumulated value.
- */
- function arrayReduceRight(array, iteratee, accumulator, initAccum) {
- var length = array == null ? 0 : array.length;
- if (initAccum && length) {
- accumulator = array[--length];
- }
- while (length--) {
- accumulator = iteratee(accumulator, array[length], length, array);
- }
- return accumulator;
- }
- /**
- * A specialized version of `_.some` for arrays without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} [array] The array to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- */
- function arraySome(array, predicate) {
- var index = -1,
- length = array == null ? 0 : array.length;
- while (++index < length) {
- if (predicate(array[index], index, array)) {
- return true;
- }
- }
- return false;
- }
- /**
- * Gets the size of an ASCII `string`.
- *
- * @private
- * @param {string} string The string inspect.
- * @returns {number} Returns the string size.
- */
- var asciiSize = baseProperty('length');
- /**
- * Converts an ASCII `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function asciiToArray(string) {
- return string.split('');
- }
- /**
- * Splits an ASCII `string` into an array of its words.
- *
- * @private
- * @param {string} The string to inspect.
- * @returns {Array} Returns the words of `string`.
- */
- function asciiWords(string) {
- return string.match(reAsciiWord) || [];
- }
- /**
- * The base implementation of methods like `_.findKey` and `_.findLastKey`,
- * without support for iteratee shorthands, which iterates over `collection`
- * using `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} predicate The function invoked per iteration.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @returns {*} Returns the found element or its key, else `undefined`.
- */
- function baseFindKey(collection, predicate, eachFunc) {
- var result;
- eachFunc(collection, function(value, key, collection) {
- if (predicate(value, key, collection)) {
- result = key;
- return false;
- }
- });
- return result;
- }
- /**
- * The base implementation of `_.findIndex` and `_.findLastIndex` without
- * support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} predicate The function invoked per iteration.
- * @param {number} fromIndex The index to search from.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseFindIndex(array, predicate, fromIndex, fromRight) {
- var length = array.length,
- index = fromIndex + (fromRight ? 1 : -1);
- while ((fromRight ? index-- : ++index < length)) {
- if (predicate(array[index], index, array)) {
- return index;
- }
- }
- return -1;
- }
- /**
- * The base implementation of `_.indexOf` without `fromIndex` bounds checks.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOf(array, value, fromIndex) {
- return value === value
- ? strictIndexOf(array, value, fromIndex)
- : baseFindIndex(array, baseIsNaN, fromIndex);
- }
- /**
- * This function is like `baseIndexOf` except that it accepts a comparator.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @param {Function} comparator The comparator invoked per element.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function baseIndexOfWith(array, value, fromIndex, comparator) {
- var index = fromIndex - 1,
- length = array.length;
- while (++index < length) {
- if (comparator(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
- /**
- * The base implementation of `_.isNaN` without support for number objects.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
- */
- function baseIsNaN(value) {
- return value !== value;
- }
- /**
- * The base implementation of `_.mean` and `_.meanBy` without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {number} Returns the mean.
- */
- function baseMean(array, iteratee) {
- var length = array == null ? 0 : array.length;
- return length ? (baseSum(array, iteratee) / length) : NAN;
- }
- /**
- * The base implementation of `_.property` without support for deep paths.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
- function baseProperty(key) {
- return function(object) {
- return object == null ? undefined : object[key];
- };
- }
- /**
- * The base implementation of `_.propertyOf` without support for deep paths.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Function} Returns the new accessor function.
- */
- function basePropertyOf(object) {
- return function(key) {
- return object == null ? undefined : object[key];
- };
- }
- /**
- * The base implementation of `_.reduce` and `_.reduceRight`, without support
- * for iteratee shorthands, which iterates over `collection` using `eachFunc`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {*} accumulator The initial value.
- * @param {boolean} initAccum Specify using the first or last element of
- * `collection` as the initial value.
- * @param {Function} eachFunc The function to iterate over `collection`.
- * @returns {*} Returns the accumulated value.
- */
- function baseReduce(collection, iteratee, accumulator, initAccum, eachFunc) {
- eachFunc(collection, function(value, index, collection) {
- accumulator = initAccum
- ? (initAccum = false, value)
- : iteratee(accumulator, value, index, collection);
- });
- return accumulator;
- }
- /**
- * The base implementation of `_.sortBy` which uses `comparer` to define the
- * sort order of `array` and replaces criteria objects with their corresponding
- * values.
- *
- * @private
- * @param {Array} array The array to sort.
- * @param {Function} comparer The function to define sort order.
- * @returns {Array} Returns `array`.
- */
- function baseSortBy(array, comparer) {
- var length = array.length;
- array.sort(comparer);
- while (length--) {
- array[length] = array[length].value;
- }
- return array;
- }
- /**
- * The base implementation of `_.sum` and `_.sumBy` without support for
- * iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {number} Returns the sum.
- */
- function baseSum(array, iteratee) {
- var result,
- index = -1,
- length = array.length;
- while (++index < length) {
- var current = iteratee(array[index]);
- if (current !== undefined) {
- result = result === undefined ? current : (result + current);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.times` without support for iteratee shorthands
- * or max array length checks.
- *
- * @private
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the array of results.
- */
- function baseTimes(n, iteratee) {
- var index = -1,
- result = Array(n);
- while (++index < n) {
- result[index] = iteratee(index);
- }
- return result;
- }
- /**
- * The base implementation of `_.toPairs` and `_.toPairsIn` which creates an array
- * of key-value pairs for `object` corresponding to the property names of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the key-value pairs.
- */
- function baseToPairs(object, props) {
- return arrayMap(props, function(key) {
- return [key, object[key]];
- });
- }
- /**
- * The base implementation of `_.unary` without support for storing metadata.
- *
- * @private
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new capped function.
- */
- function baseUnary(func) {
- return function(value) {
- return func(value);
- };
- }
- /**
- * The base implementation of `_.values` and `_.valuesIn` which creates an
- * array of `object` property values corresponding to the property names
- * of `props`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} props The property names to get values for.
- * @returns {Object} Returns the array of property values.
- */
- function baseValues(object, props) {
- return arrayMap(props, function(key) {
- return object[key];
- });
- }
- /**
- * Checks if a `cache` value for `key` exists.
- *
- * @private
- * @param {Object} cache The cache to query.
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function cacheHas(cache, key) {
- return cache.has(key);
- }
- /**
- * Used by `_.trim` and `_.trimStart` to get the index of the first string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the first unmatched string symbol.
- */
- function charsStartIndex(strSymbols, chrSymbols) {
- var index = -1,
- length = strSymbols.length;
- while (++index < length && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
- /**
- * Used by `_.trim` and `_.trimEnd` to get the index of the last string symbol
- * that is not found in the character symbols.
- *
- * @private
- * @param {Array} strSymbols The string symbols to inspect.
- * @param {Array} chrSymbols The character symbols to find.
- * @returns {number} Returns the index of the last unmatched string symbol.
- */
- function charsEndIndex(strSymbols, chrSymbols) {
- var index = strSymbols.length;
- while (index-- && baseIndexOf(chrSymbols, strSymbols[index], 0) > -1) {}
- return index;
- }
- /**
- * Gets the number of `placeholder` occurrences in `array`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} placeholder The placeholder to search for.
- * @returns {number} Returns the placeholder count.
- */
- function countHolders(array, placeholder) {
- var length = array.length,
- result = 0;
- while (length--) {
- if (array[length] === placeholder) {
- ++result;
- }
- }
- return result;
- }
- /**
- * Used by `_.deburr` to convert Latin-1 Supplement and Latin Extended-A
- * letters to basic Latin letters.
- *
- * @private
- * @param {string} letter The matched letter to deburr.
- * @returns {string} Returns the deburred letter.
- */
- var deburrLetter = basePropertyOf(deburredLetters);
- /**
- * Used by `_.escape` to convert characters to HTML entities.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- var escapeHtmlChar = basePropertyOf(htmlEscapes);
- /**
- * Used by `_.template` to escape characters for inclusion in compiled string literals.
- *
- * @private
- * @param {string} chr The matched character to escape.
- * @returns {string} Returns the escaped character.
- */
- function escapeStringChar(chr) {
- return '\\' + stringEscapes[chr];
- }
- /**
- * Gets the value at `key` of `object`.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {string} key The key of the property to get.
- * @returns {*} Returns the property value.
- */
- function getValue(object, key) {
- return object == null ? undefined : object[key];
- }
- /**
- * Checks if `string` contains Unicode symbols.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {boolean} Returns `true` if a symbol is found, else `false`.
- */
- function hasUnicode(string) {
- return reHasUnicode.test(string);
- }
- /**
- * Checks if `string` contains a word composed of Unicode symbols.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {boolean} Returns `true` if a word is found, else `false`.
- */
- function hasUnicodeWord(string) {
- return reHasUnicodeWord.test(string);
- }
- /**
- * Converts `iterator` to an array.
- *
- * @private
- * @param {Object} iterator The iterator to convert.
- * @returns {Array} Returns the converted array.
- */
- function iteratorToArray(iterator) {
- var data,
- result = [];
- while (!(data = iterator.next()).done) {
- result.push(data.value);
- }
- return result;
- }
- /**
- * Converts `map` to its key-value pairs.
- *
- * @private
- * @param {Object} map The map to convert.
- * @returns {Array} Returns the key-value pairs.
- */
- function mapToArray(map) {
- var index = -1,
- result = Array(map.size);
- map.forEach(function(value, key) {
- result[++index] = [key, value];
- });
- return result;
- }
- /**
- * Creates a unary function that invokes `func` with its argument transformed.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {Function} transform The argument transform.
- * @returns {Function} Returns the new function.
- */
- function overArg(func, transform) {
- return function(arg) {
- return func(transform(arg));
- };
- }
- /**
- * Replaces all `placeholder` elements in `array` with an internal placeholder
- * and returns an array of their indexes.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {*} placeholder The placeholder to replace.
- * @returns {Array} Returns the new array of placeholder indexes.
- */
- function replaceHolders(array, placeholder) {
- var index = -1,
- length = array.length,
- resIndex = 0,
- result = [];
- while (++index < length) {
- var value = array[index];
- if (value === placeholder || value === PLACEHOLDER) {
- array[index] = PLACEHOLDER;
- result[resIndex++] = index;
- }
- }
- return result;
- }
- /**
- * Converts `set` to an array of its values.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the values.
- */
- function setToArray(set) {
- var index = -1,
- result = Array(set.size);
- set.forEach(function(value) {
- result[++index] = value;
- });
- return result;
- }
- /**
- * Converts `set` to its value-value pairs.
- *
- * @private
- * @param {Object} set The set to convert.
- * @returns {Array} Returns the value-value pairs.
- */
- function setToPairs(set) {
- var index = -1,
- result = Array(set.size);
- set.forEach(function(value) {
- result[++index] = [value, value];
- });
- return result;
- }
- /**
- * A specialized version of `_.indexOf` which performs strict equality
- * comparisons of values, i.e. `===`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function strictIndexOf(array, value, fromIndex) {
- var index = fromIndex - 1,
- length = array.length;
- while (++index < length) {
- if (array[index] === value) {
- return index;
- }
- }
- return -1;
- }
- /**
- * A specialized version of `_.lastIndexOf` which performs strict equality
- * comparisons of values, i.e. `===`.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} fromIndex The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function strictLastIndexOf(array, value, fromIndex) {
- var index = fromIndex + 1;
- while (index--) {
- if (array[index] === value) {
- return index;
- }
- }
- return index;
- }
- /**
- * Gets the number of symbols in `string`.
- *
- * @private
- * @param {string} string The string to inspect.
- * @returns {number} Returns the string size.
- */
- function stringSize(string) {
- return hasUnicode(string)
- ? unicodeSize(string)
- : asciiSize(string);
- }
- /**
- * Converts `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function stringToArray(string) {
- return hasUnicode(string)
- ? unicodeToArray(string)
- : asciiToArray(string);
- }
- /**
- * Used by `_.unescape` to convert HTML entities to characters.
- *
- * @private
- * @param {string} chr The matched character to unescape.
- * @returns {string} Returns the unescaped character.
- */
- var unescapeHtmlChar = basePropertyOf(htmlUnescapes);
- /**
- * Gets the size of a Unicode `string`.
- *
- * @private
- * @param {string} string The string inspect.
- * @returns {number} Returns the string size.
- */
- function unicodeSize(string) {
- var result = reUnicode.lastIndex = 0;
- while (reUnicode.test(string)) {
- ++result;
- }
- return result;
- }
- /**
- * Converts a Unicode `string` to an array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the converted array.
- */
- function unicodeToArray(string) {
- return string.match(reUnicode) || [];
- }
- /**
- * Splits a Unicode `string` into an array of its words.
- *
- * @private
- * @param {string} The string to inspect.
- * @returns {Array} Returns the words of `string`.
- */
- function unicodeWords(string) {
- return string.match(reUnicodeWord) || [];
- }
- /*--------------------------------------------------------------------------*/
- /**
- * Create a new pristine `lodash` function using the `context` object.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category Util
- * @param {Object} [context=root] The context object.
- * @returns {Function} Returns a new `lodash` function.
- * @example
- *
- * _.mixin({ 'foo': _.constant('foo') });
- *
- * var lodash = _.runInContext();
- * lodash.mixin({ 'bar': lodash.constant('bar') });
- *
- * _.isFunction(_.foo);
- * // => true
- * _.isFunction(_.bar);
- * // => false
- *
- * lodash.isFunction(lodash.foo);
- * // => false
- * lodash.isFunction(lodash.bar);
- * // => true
- *
- * // Create a suped-up `defer` in Node.js.
- * var defer = _.runInContext({ 'setTimeout': setImmediate }).defer;
- */
- var runInContext = (function runInContext(context) {
- context = context == null ? root : _.defaults(root.Object(), context, _.pick(root, contextProps));
- /** Built-in constructor references. */
- var Array = context.Array,
- Date = context.Date,
- Error = context.Error,
- Function = context.Function,
- Math = context.Math,
- Object = context.Object,
- RegExp = context.RegExp,
- String = context.String,
- TypeError = context.TypeError;
- /** Used for built-in method references. */
- var arrayProto = Array.prototype,
- funcProto = Function.prototype,
- objectProto = Object.prototype;
- /** Used to detect overreaching core-js shims. */
- var coreJsData = context['__core-js_shared__'];
- /** Used to resolve the decompiled source of functions. */
- var funcToString = funcProto.toString;
- /** Used to check objects for own properties. */
- var hasOwnProperty = objectProto.hasOwnProperty;
- /** Used to generate unique IDs. */
- var idCounter = 0;
- /** Used to detect methods masquerading as native. */
- var maskSrcKey = (function() {
- var uid = /[^.]+$/.exec(coreJsData && coreJsData.keys && coreJsData.keys.IE_PROTO || '');
- return uid ? ('Symbol(src)_1.' + uid) : '';
- }());
- /**
- * Used to resolve the
- * [`toStringTag`](http://ecma-international.org/ecma-262/7.0/#sec-object.prototype.tostring)
- * of values.
- */
- var nativeObjectToString = objectProto.toString;
- /** Used to infer the `Object` constructor. */
- var objectCtorString = funcToString.call(Object);
- /** Used to restore the original `_` reference in `_.noConflict`. */
- var oldDash = root._;
- /** Used to detect if a method is native. */
- var reIsNative = RegExp('^' +
- funcToString.call(hasOwnProperty).replace(reRegExpChar, '\\$&')
- .replace(/hasOwnProperty|(function).*?(?=\\\()| for .+?(?=\\\])/g, '$1.*?') + '$'
- );
- /** Built-in value references. */
- var Buffer = moduleExports ? context.Buffer : undefined,
- Symbol = context.Symbol,
- Uint8Array = context.Uint8Array,
- allocUnsafe = Buffer ? Buffer.allocUnsafe : undefined,
- getPrototype = overArg(Object.getPrototypeOf, Object),
- objectCreate = Object.create,
- propertyIsEnumerable = objectProto.propertyIsEnumerable,
- splice = arrayProto.splice,
- spreadableSymbol = Symbol ? Symbol.isConcatSpreadable : undefined,
- symIterator = Symbol ? Symbol.iterator : undefined,
- symToStringTag = Symbol ? Symbol.toStringTag : undefined;
- var defineProperty = (function() {
- try {
- var func = getNative(Object, 'defineProperty');
- func({}, '', {});
- return func;
- } catch (e) {}
- }());
- /** Mocked built-ins. */
- var ctxClearTimeout = context.clearTimeout !== root.clearTimeout && context.clearTimeout,
- ctxNow = Date && Date.now !== root.Date.now && Date.now,
- ctxSetTimeout = context.setTimeout !== root.setTimeout && context.setTimeout;
- /* Built-in method references for those with the same name as other `lodash` methods. */
- var nativeCeil = Math.ceil,
- nativeFloor = Math.floor,
- nativeGetSymbols = Object.getOwnPropertySymbols,
- nativeIsBuffer = Buffer ? Buffer.isBuffer : undefined,
- nativeIsFinite = context.isFinite,
- nativeJoin = arrayProto.join,
- nativeKeys = overArg(Object.keys, Object),
- nativeMax = Math.max,
- nativeMin = Math.min,
- nativeNow = Date.now,
- nativeParseInt = context.parseInt,
- nativeRandom = Math.random,
- nativeReverse = arrayProto.reverse;
- /* Built-in method references that are verified to be native. */
- var DataView = getNative(context, 'DataView'),
- Map = getNative(context, 'Map'),
- Promise = getNative(context, 'Promise'),
- Set = getNative(context, 'Set'),
- WeakMap = getNative(context, 'WeakMap'),
- nativeCreate = getNative(Object, 'create');
- /** Used to store function metadata. */
- var metaMap = WeakMap && new WeakMap;
- /** Used to lookup unminified function names. */
- var realNames = {};
- /** Used to detect maps, sets, and weakmaps. */
- var dataViewCtorString = toSource(DataView),
- mapCtorString = toSource(Map),
- promiseCtorString = toSource(Promise),
- setCtorString = toSource(Set),
- weakMapCtorString = toSource(WeakMap);
- /** Used to convert symbols to primitives and strings. */
- var symbolProto = Symbol ? Symbol.prototype : undefined,
- symbolValueOf = symbolProto ? symbolProto.valueOf : undefined,
- symbolToString = symbolProto ? symbolProto.toString : undefined;
- /*------------------------------------------------------------------------*/
- /**
- * Creates a `lodash` object which wraps `value` to enable implicit method
- * chain sequences. Methods that operate on and return arrays, collections,
- * and functions can be chained together. Methods that retrieve a single value
- * or may return a primitive value will automatically end the chain sequence
- * and return the unwrapped value. Otherwise, the value must be unwrapped
- * with `_#value`.
- *
- * Explicit chain sequences, which must be unwrapped with `_#value`, may be
- * enabled using `_.chain`.
- *
- * The execution of chained methods is lazy, that is, it's deferred until
- * `_#value` is implicitly or explicitly called.
- *
- * Lazy evaluation allows several methods to support shortcut fusion.
- * Shortcut fusion is an optimization to merge iteratee calls; this avoids
- * the creation of intermediate arrays and can greatly reduce the number of
- * iteratee executions. Sections of a chain sequence qualify for shortcut
- * fusion if the section is applied to an array and iteratees accept only
- * one argument. The heuristic for whether a section qualifies for shortcut
- * fusion is subject to change.
- *
- * Chaining is supported in custom builds as long as the `_#value` method is
- * directly or indirectly included in the build.
- *
- * In addition to lodash methods, wrappers have `Array` and `String` methods.
- *
- * The wrapper `Array` methods are:
- * `concat`, `join`, `pop`, `push`, `shift`, `sort`, `splice`, and `unshift`
- *
- * The wrapper `String` methods are:
- * `replace` and `split`
- *
- * The wrapper methods that support shortcut fusion are:
- * `at`, `compact`, `drop`, `dropRight`, `dropWhile`, `filter`, `find`,
- * `findLast`, `head`, `initial`, `last`, `map`, `reject`, `reverse`, `slice`,
- * `tail`, `take`, `takeRight`, `takeRightWhile`, `takeWhile`, and `toArray`
- *
- * The chainable wrapper methods are:
- * `after`, `ary`, `assign`, `assignIn`, `assignInWith`, `assignWith`, `at`,
- * `before`, `bind`, `bindAll`, `bindKey`, `castArray`, `chain`, `chunk`,
- * `commit`, `compact`, `concat`, `conforms`, `constant`, `countBy`, `create`,
- * `curry`, `debounce`, `defaults`, `defaultsDeep`, `defer`, `delay`,
- * `difference`, `differenceBy`, `differenceWith`, `drop`, `dropRight`,
- * `dropRightWhile`, `dropWhile`, `extend`, `extendWith`, `fill`, `filter`,
- * `flatMap`, `flatMapDeep`, `flatMapDepth`, `flatten`, `flattenDeep`,
- * `flattenDepth`, `flip`, `flow`, `flowRight`, `fromPairs`, `functions`,
- * `functionsIn`, `groupBy`, `initial`, `intersection`, `intersectionBy`,
- * `intersectionWith`, `invert`, `invertBy`, `invokeMap`, `iteratee`, `keyBy`,
- * `keys`, `keysIn`, `map`, `mapKeys`, `mapValues`, `matches`, `matchesProperty`,
- * `memoize`, `merge`, `mergeWith`, `method`, `methodOf`, `mixin`, `negate`,
- * `nthArg`, `omit`, `omitBy`, `once`, `orderBy`, `over`, `overArgs`,
- * `overEvery`, `overSome`, `partial`, `partialRight`, `partition`, `pick`,
- * `pickBy`, `plant`, `property`, `propertyOf`, `pull`, `pullAll`, `pullAllBy`,
- * `pullAllWith`, `pullAt`, `push`, `range`, `rangeRight`, `rearg`, `reject`,
- * `remove`, `rest`, `reverse`, `sampleSize`, `set`, `setWith`, `shuffle`,
- * `slice`, `sort`, `sortBy`, `splice`, `spread`, `tail`, `take`, `takeRight`,
- * `takeRightWhile`, `takeWhile`, `tap`, `throttle`, `thru`, `toArray`,
- * `toPairs`, `toPairsIn`, `toPath`, `toPlainObject`, `transform`, `unary`,
- * `union`, `unionBy`, `unionWith`, `uniq`, `uniqBy`, `uniqWith`, `unset`,
- * `unshift`, `unzip`, `unzipWith`, `update`, `updateWith`, `values`,
- * `valuesIn`, `without`, `wrap`, `xor`, `xorBy`, `xorWith`, `zip`,
- * `zipObject`, `zipObjectDeep`, and `zipWith`
- *
- * The wrapper methods that are **not** chainable by default are:
- * `add`, `attempt`, `camelCase`, `capitalize`, `ceil`, `clamp`, `clone`,
- * `cloneDeep`, `cloneDeepWith`, `cloneWith`, `conformsTo`, `deburr`,
- * `defaultTo`, `divide`, `each`, `eachRight`, `endsWith`, `eq`, `escape`,
- * `escapeRegExp`, `every`, `find`, `findIndex`, `findKey`, `findLast`,
- * `findLastIndex`, `findLastKey`, `first`, `floor`, `forEach`, `forEachRight`,
- * `forIn`, `forInRight`, `forOwn`, `forOwnRight`, `get`, `gt`, `gte`, `has`,
- * `hasIn`, `head`, `identity`, `includes`, `indexOf`, `inRange`, `invoke`,
- * `isArguments`, `isArray`, `isArrayBuffer`, `isArrayLike`, `isArrayLikeObject`,
- * `isBoolean`, `isBuffer`, `isDate`, `isElement`, `isEmpty`, `isEqual`,
- * `isEqualWith`, `isError`, `isFinite`, `isFunction`, `isInteger`, `isLength`,
- * `isMap`, `isMatch`, `isMatchWith`, `isNaN`, `isNative`, `isNil`, `isNull`,
- * `isNumber`, `isObject`, `isObjectLike`, `isPlainObject`, `isRegExp`,
- * `isSafeInteger`, `isSet`, `isString`, `isUndefined`, `isTypedArray`,
- * `isWeakMap`, `isWeakSet`, `join`, `kebabCase`, `last`, `lastIndexOf`,
- * `lowerCase`, `lowerFirst`, `lt`, `lte`, `max`, `maxBy`, `mean`, `meanBy`,
- * `min`, `minBy`, `multiply`, `noConflict`, `noop`, `now`, `nth`, `pad`,
- * `padEnd`, `padStart`, `parseInt`, `pop`, `random`, `reduce`, `reduceRight`,
- * `repeat`, `result`, `round`, `runInContext`, `sample`, `shift`, `size`,
- * `snakeCase`, `some`, `sortedIndex`, `sortedIndexBy`, `sortedLastIndex`,
- * `sortedLastIndexBy`, `startCase`, `startsWith`, `stubArray`, `stubFalse`,
- * `stubObject`, `stubString`, `stubTrue`, `subtract`, `sum`, `sumBy`,
- * `template`, `times`, `toFinite`, `toInteger`, `toJSON`, `toLength`,
- * `toLower`, `toNumber`, `toSafeInteger`, `toString`, `toUpper`, `trim`,
- * `trimEnd`, `trimStart`, `truncate`, `unescape`, `uniqueId`, `upperCase`,
- * `upperFirst`, `value`, and `words`
- *
- * @name _
- * @constructor
- * @category Seq
- * @param {*} value The value to wrap in a `lodash` instance.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2, 3]);
- *
- * // Returns an unwrapped value.
- * wrapped.reduce(_.add);
- * // => 6
- *
- * // Returns a wrapped value.
- * var squares = wrapped.map(square);
- *
- * _.isArray(squares);
- * // => false
- *
- * _.isArray(squares.value());
- * // => true
- */
- function lodash(value) {
- if (isObjectLike(value) && !isArray(value) && !(value instanceof LazyWrapper)) {
- if (value instanceof LodashWrapper) {
- return value;
- }
- if (hasOwnProperty.call(value, '__wrapped__')) {
- return wrapperClone(value);
- }
- }
- return new LodashWrapper(value);
- }
- /**
- * The base implementation of `_.create` without support for assigning
- * properties to the created object.
- *
- * @private
- * @param {Object} proto The object to inherit from.
- * @returns {Object} Returns the new object.
- */
- var baseCreate = (function() {
- function object() {}
- return function(proto) {
- if (!isObject(proto)) {
- return {};
- }
- if (objectCreate) {
- return objectCreate(proto);
- }
- object.prototype = proto;
- var result = new object;
- object.prototype = undefined;
- return result;
- };
- }());
- /**
- * The function whose prototype chain sequence wrappers inherit from.
- *
- * @private
- */
- function baseLodash() {
- // No operation performed.
- }
- /**
- * The base constructor for creating `lodash` wrapper objects.
- *
- * @private
- * @param {*} value The value to wrap.
- * @param {boolean} [chainAll] Enable explicit method chain sequences.
- */
- function LodashWrapper(value, chainAll) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__chain__ = !!chainAll;
- this.__index__ = 0;
- this.__values__ = undefined;
- }
- /**
- * By default, the template delimiters used by lodash are like those in
- * embedded Ruby (ERB) as well as ES2015 template strings. Change the
- * following template settings to use alternative delimiters.
- *
- * @static
- * @memberOf _
- * @type {Object}
- */
- lodash.templateSettings = {
- /**
- * Used to detect `data` property values to be HTML-escaped.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'escape': reEscape,
- /**
- * Used to detect code to be evaluated.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'evaluate': reEvaluate,
- /**
- * Used to detect `data` property values to inject.
- *
- * @memberOf _.templateSettings
- * @type {RegExp}
- */
- 'interpolate': reInterpolate,
- /**
- * Used to reference the data object in the template text.
- *
- * @memberOf _.templateSettings
- * @type {string}
- */
- 'variable': '',
- /**
- * Used to import variables into the compiled template.
- *
- * @memberOf _.templateSettings
- * @type {Object}
- */
- 'imports': {
- /**
- * A reference to the `lodash` function.
- *
- * @memberOf _.templateSettings.imports
- * @type {Function}
- */
- '_': lodash
- }
- };
- // Ensure wrappers are instances of `baseLodash`.
- lodash.prototype = baseLodash.prototype;
- lodash.prototype.constructor = lodash;
- LodashWrapper.prototype = baseCreate(baseLodash.prototype);
- LodashWrapper.prototype.constructor = LodashWrapper;
- /*------------------------------------------------------------------------*/
- /**
- * Creates a lazy wrapper object which wraps `value` to enable lazy evaluation.
- *
- * @private
- * @constructor
- * @param {*} value The value to wrap.
- */
- function LazyWrapper(value) {
- this.__wrapped__ = value;
- this.__actions__ = [];
- this.__dir__ = 1;
- this.__filtered__ = false;
- this.__iteratees__ = [];
- this.__takeCount__ = MAX_ARRAY_LENGTH;
- this.__views__ = [];
- }
- /**
- * Creates a clone of the lazy wrapper object.
- *
- * @private
- * @name clone
- * @memberOf LazyWrapper
- * @returns {Object} Returns the cloned `LazyWrapper` object.
- */
- function lazyClone() {
- var result = new LazyWrapper(this.__wrapped__);
- result.__actions__ = copyArray(this.__actions__);
- result.__dir__ = this.__dir__;
- result.__filtered__ = this.__filtered__;
- result.__iteratees__ = copyArray(this.__iteratees__);
- result.__takeCount__ = this.__takeCount__;
- result.__views__ = copyArray(this.__views__);
- return result;
- }
- /**
- * Reverses the direction of lazy iteration.
- *
- * @private
- * @name reverse
- * @memberOf LazyWrapper
- * @returns {Object} Returns the new reversed `LazyWrapper` object.
- */
- function lazyReverse() {
- if (this.__filtered__) {
- var result = new LazyWrapper(this);
- result.__dir__ = -1;
- result.__filtered__ = true;
- } else {
- result = this.clone();
- result.__dir__ *= -1;
- }
- return result;
- }
- /**
- * Extracts the unwrapped value from its lazy wrapper.
- *
- * @private
- * @name value
- * @memberOf LazyWrapper
- * @returns {*} Returns the unwrapped value.
- */
- function lazyValue() {
- var array = this.__wrapped__.value(),
- dir = this.__dir__,
- isArr = isArray(array),
- isRight = dir < 0,
- arrLength = isArr ? array.length : 0,
- view = getView(0, arrLength, this.__views__),
- start = view.start,
- end = view.end,
- length = end - start,
- index = isRight ? end : (start - 1),
- iteratees = this.__iteratees__,
- iterLength = iteratees.length,
- resIndex = 0,
- takeCount = nativeMin(length, this.__takeCount__);
- if (!isArr || (!isRight && arrLength == length && takeCount == length)) {
- return baseWrapperValue(array, this.__actions__);
- }
- var result = [];
- outer:
- while (length-- && resIndex < takeCount) {
- index += dir;
- var iterIndex = -1,
- value = array[index];
- while (++iterIndex < iterLength) {
- var data = iteratees[iterIndex],
- iteratee = data.iteratee,
- type = data.type,
- computed = iteratee(value);
- if (type == LAZY_MAP_FLAG) {
- value = computed;
- } else if (!computed) {
- if (type == LAZY_FILTER_FLAG) {
- continue outer;
- } else {
- break outer;
- }
- }
- }
- result[resIndex++] = value;
- }
- return result;
- }
- // Ensure `LazyWrapper` is an instance of `baseLodash`.
- LazyWrapper.prototype = baseCreate(baseLodash.prototype);
- LazyWrapper.prototype.constructor = LazyWrapper;
- /*------------------------------------------------------------------------*/
- /**
- * Creates a hash object.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function Hash(entries) {
- var index = -1,
- length = entries == null ? 0 : entries.length;
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
- /**
- * Removes all key-value entries from the hash.
- *
- * @private
- * @name clear
- * @memberOf Hash
- */
- function hashClear() {
- this.__data__ = nativeCreate ? nativeCreate(null) : {};
- this.size = 0;
- }
- /**
- * Removes `key` and its value from the hash.
- *
- * @private
- * @name delete
- * @memberOf Hash
- * @param {Object} hash The hash to modify.
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function hashDelete(key) {
- var result = this.has(key) && delete this.__data__[key];
- this.size -= result ? 1 : 0;
- return result;
- }
- /**
- * Gets the hash value for `key`.
- *
- * @private
- * @name get
- * @memberOf Hash
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function hashGet(key) {
- var data = this.__data__;
- if (nativeCreate) {
- var result = data[key];
- return result === HASH_UNDEFINED ? undefined : result;
- }
- return hasOwnProperty.call(data, key) ? data[key] : undefined;
- }
- /**
- * Checks if a hash value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Hash
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function hashHas(key) {
- var data = this.__data__;
- return nativeCreate ? (data[key] !== undefined) : hasOwnProperty.call(data, key);
- }
- /**
- * Sets the hash `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Hash
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the hash instance.
- */
- function hashSet(key, value) {
- var data = this.__data__;
- this.size += this.has(key) ? 0 : 1;
- data[key] = (nativeCreate && value === undefined) ? HASH_UNDEFINED : value;
- return this;
- }
- // Add methods to `Hash`.
- Hash.prototype.clear = hashClear;
- Hash.prototype['delete'] = hashDelete;
- Hash.prototype.get = hashGet;
- Hash.prototype.has = hashHas;
- Hash.prototype.set = hashSet;
- /*------------------------------------------------------------------------*/
- /**
- * Creates an list cache object.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function ListCache(entries) {
- var index = -1,
- length = entries == null ? 0 : entries.length;
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
- /**
- * Removes all key-value entries from the list cache.
- *
- * @private
- * @name clear
- * @memberOf ListCache
- */
- function listCacheClear() {
- this.__data__ = [];
- this.size = 0;
- }
- /**
- * Removes `key` and its value from the list cache.
- *
- * @private
- * @name delete
- * @memberOf ListCache
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function listCacheDelete(key) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
- if (index < 0) {
- return false;
- }
- var lastIndex = data.length - 1;
- if (index == lastIndex) {
- data.pop();
- } else {
- splice.call(data, index, 1);
- }
- --this.size;
- return true;
- }
- /**
- * Gets the list cache value for `key`.
- *
- * @private
- * @name get
- * @memberOf ListCache
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function listCacheGet(key) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
- return index < 0 ? undefined : data[index][1];
- }
- /**
- * Checks if a list cache value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf ListCache
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function listCacheHas(key) {
- return assocIndexOf(this.__data__, key) > -1;
- }
- /**
- * Sets the list cache `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf ListCache
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the list cache instance.
- */
- function listCacheSet(key, value) {
- var data = this.__data__,
- index = assocIndexOf(data, key);
- if (index < 0) {
- ++this.size;
- data.push([key, value]);
- } else {
- data[index][1] = value;
- }
- return this;
- }
- // Add methods to `ListCache`.
- ListCache.prototype.clear = listCacheClear;
- ListCache.prototype['delete'] = listCacheDelete;
- ListCache.prototype.get = listCacheGet;
- ListCache.prototype.has = listCacheHas;
- ListCache.prototype.set = listCacheSet;
- /*------------------------------------------------------------------------*/
- /**
- * Creates a map cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function MapCache(entries) {
- var index = -1,
- length = entries == null ? 0 : entries.length;
- this.clear();
- while (++index < length) {
- var entry = entries[index];
- this.set(entry[0], entry[1]);
- }
- }
- /**
- * Removes all key-value entries from the map.
- *
- * @private
- * @name clear
- * @memberOf MapCache
- */
- function mapCacheClear() {
- this.size = 0;
- this.__data__ = {
- 'hash': new Hash,
- 'map': new (Map || ListCache),
- 'string': new Hash
- };
- }
- /**
- * Removes `key` and its value from the map.
- *
- * @private
- * @name delete
- * @memberOf MapCache
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function mapCacheDelete(key) {
- var result = getMapData(this, key)['delete'](key);
- this.size -= result ? 1 : 0;
- return result;
- }
- /**
- * Gets the map value for `key`.
- *
- * @private
- * @name get
- * @memberOf MapCache
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function mapCacheGet(key) {
- return getMapData(this, key).get(key);
- }
- /**
- * Checks if a map value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf MapCache
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function mapCacheHas(key) {
- return getMapData(this, key).has(key);
- }
- /**
- * Sets the map `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf MapCache
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the map cache instance.
- */
- function mapCacheSet(key, value) {
- var data = getMapData(this, key),
- size = data.size;
- data.set(key, value);
- this.size += data.size == size ? 0 : 1;
- return this;
- }
- // Add methods to `MapCache`.
- MapCache.prototype.clear = mapCacheClear;
- MapCache.prototype['delete'] = mapCacheDelete;
- MapCache.prototype.get = mapCacheGet;
- MapCache.prototype.has = mapCacheHas;
- MapCache.prototype.set = mapCacheSet;
- /*------------------------------------------------------------------------*/
- /**
- *
- * Creates an array cache object to store unique values.
- *
- * @private
- * @constructor
- * @param {Array} [values] The values to cache.
- */
- function SetCache(values) {
- var index = -1,
- length = values == null ? 0 : values.length;
- this.__data__ = new MapCache;
- while (++index < length) {
- this.add(values[index]);
- }
- }
- /**
- * Adds `value` to the array cache.
- *
- * @private
- * @name add
- * @memberOf SetCache
- * @alias push
- * @param {*} value The value to cache.
- * @returns {Object} Returns the cache instance.
- */
- function setCacheAdd(value) {
- this.__data__.set(value, HASH_UNDEFINED);
- return this;
- }
- /**
- * Checks if `value` is in the array cache.
- *
- * @private
- * @name has
- * @memberOf SetCache
- * @param {*} value The value to search for.
- * @returns {number} Returns `true` if `value` is found, else `false`.
- */
- function setCacheHas(value) {
- return this.__data__.has(value);
- }
- // Add methods to `SetCache`.
- SetCache.prototype.add = SetCache.prototype.push = setCacheAdd;
- SetCache.prototype.has = setCacheHas;
- /*------------------------------------------------------------------------*/
- /**
- * Creates a stack cache object to store key-value pairs.
- *
- * @private
- * @constructor
- * @param {Array} [entries] The key-value pairs to cache.
- */
- function Stack(entries) {
- var data = this.__data__ = new ListCache(entries);
- this.size = data.size;
- }
- /**
- * Removes all key-value entries from the stack.
- *
- * @private
- * @name clear
- * @memberOf Stack
- */
- function stackClear() {
- this.__data__ = new ListCache;
- this.size = 0;
- }
- /**
- * Removes `key` and its value from the stack.
- *
- * @private
- * @name delete
- * @memberOf Stack
- * @param {string} key The key of the value to remove.
- * @returns {boolean} Returns `true` if the entry was removed, else `false`.
- */
- function stackDelete(key) {
- var data = this.__data__,
- result = data['delete'](key);
- this.size = data.size;
- return result;
- }
- /**
- * Gets the stack value for `key`.
- *
- * @private
- * @name get
- * @memberOf Stack
- * @param {string} key The key of the value to get.
- * @returns {*} Returns the entry value.
- */
- function stackGet(key) {
- return this.__data__.get(key);
- }
- /**
- * Checks if a stack value for `key` exists.
- *
- * @private
- * @name has
- * @memberOf Stack
- * @param {string} key The key of the entry to check.
- * @returns {boolean} Returns `true` if an entry for `key` exists, else `false`.
- */
- function stackHas(key) {
- return this.__data__.has(key);
- }
- /**
- * Sets the stack `key` to `value`.
- *
- * @private
- * @name set
- * @memberOf Stack
- * @param {string} key The key of the value to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns the stack cache instance.
- */
- function stackSet(key, value) {
- var data = this.__data__;
- if (data instanceof ListCache) {
- var pairs = data.__data__;
- if (!Map || (pairs.length < LARGE_ARRAY_SIZE - 1)) {
- pairs.push([key, value]);
- this.size = ++data.size;
- return this;
- }
- data = this.__data__ = new MapCache(pairs);
- }
- data.set(key, value);
- this.size = data.size;
- return this;
- }
- // Add methods to `Stack`.
- Stack.prototype.clear = stackClear;
- Stack.prototype['delete'] = stackDelete;
- Stack.prototype.get = stackGet;
- Stack.prototype.has = stackHas;
- Stack.prototype.set = stackSet;
- /*------------------------------------------------------------------------*/
- /**
- * Creates an array of the enumerable property names of the array-like `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @param {boolean} inherited Specify returning inherited property names.
- * @returns {Array} Returns the array of property names.
- */
- function arrayLikeKeys(value, inherited) {
- var isArr = isArray(value),
- isArg = !isArr && isArguments(value),
- isBuff = !isArr && !isArg && isBuffer(value),
- isType = !isArr && !isArg && !isBuff && isTypedArray(value),
- skipIndexes = isArr || isArg || isBuff || isType,
- result = skipIndexes ? baseTimes(value.length, String) : [],
- length = result.length;
- for (var key in value) {
- if ((inherited || hasOwnProperty.call(value, key)) &&
- !(skipIndexes && (
- // Safari 9 has enumerable `arguments.length` in strict mode.
- key == 'length' ||
- // Node.js 0.10 has enumerable non-index properties on buffers.
- (isBuff && (key == 'offset' || key == 'parent')) ||
- // PhantomJS 2 has enumerable non-index properties on typed arrays.
- (isType && (key == 'buffer' || key == 'byteLength' || key == 'byteOffset')) ||
- // Skip index properties.
- isIndex(key, length)
- ))) {
- result.push(key);
- }
- }
- return result;
- }
- /**
- * A specialized version of `_.sample` for arrays.
- *
- * @private
- * @param {Array} array The array to sample.
- * @returns {*} Returns the random element.
- */
- function arraySample(array) {
- var length = array.length;
- return length ? array[baseRandom(0, length - 1)] : undefined;
- }
- /**
- * A specialized version of `_.sampleSize` for arrays.
- *
- * @private
- * @param {Array} array The array to sample.
- * @param {number} n The number of elements to sample.
- * @returns {Array} Returns the random elements.
- */
- function arraySampleSize(array, n) {
- return shuffleSelf(copyArray(array), baseClamp(n, 0, array.length));
- }
- /**
- * A specialized version of `_.shuffle` for arrays.
- *
- * @private
- * @param {Array} array The array to shuffle.
- * @returns {Array} Returns the new shuffled array.
- */
- function arrayShuffle(array) {
- return shuffleSelf(copyArray(array));
- }
- /**
- * This function is like `assignValue` except that it doesn't assign
- * `undefined` values.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignMergeValue(object, key, value) {
- if ((value !== undefined && !eq(object[key], value)) ||
- (value === undefined && !(key in object))) {
- baseAssignValue(object, key, value);
- }
- }
- /**
- * Assigns `value` to `key` of `object` if the existing value is not equivalent
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function assignValue(object, key, value) {
- var objValue = object[key];
- if (!(hasOwnProperty.call(object, key) && eq(objValue, value)) ||
- (value === undefined && !(key in object))) {
- baseAssignValue(object, key, value);
- }
- }
- /**
- * Gets the index at which the `key` is found in `array` of key-value pairs.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {*} key The key to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- */
- function assocIndexOf(array, key) {
- var length = array.length;
- while (length--) {
- if (eq(array[length][0], key)) {
- return length;
- }
- }
- return -1;
- }
- /**
- * Aggregates elements of `collection` on `accumulator` with keys transformed
- * by `iteratee` and values set by `setter`.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform keys.
- * @param {Object} accumulator The initial aggregated object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseAggregator(collection, setter, iteratee, accumulator) {
- baseEach(collection, function(value, key, collection) {
- setter(accumulator, value, iteratee(value), collection);
- });
- return accumulator;
- }
- /**
- * The base implementation of `_.assign` without support for multiple sources
- * or `customizer` functions.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @returns {Object} Returns `object`.
- */
- function baseAssign(object, source) {
- return object && copyObject(source, keys(source), object);
- }
- /**
- * The base implementation of `_.assignIn` without support for multiple sources
- * or `customizer` functions.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @returns {Object} Returns `object`.
- */
- function baseAssignIn(object, source) {
- return object && copyObject(source, keysIn(source), object);
- }
- /**
- * The base implementation of `assignValue` and `assignMergeValue` without
- * value checks.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {string} key The key of the property to assign.
- * @param {*} value The value to assign.
- */
- function baseAssignValue(object, key, value) {
- if (key == '__proto__' && defineProperty) {
- defineProperty(object, key, {
- 'configurable': true,
- 'enumerable': true,
- 'value': value,
- 'writable': true
- });
- } else {
- object[key] = value;
- }
- }
- /**
- * The base implementation of `_.at` without support for individual paths.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {string[]} paths The property paths to pick.
- * @returns {Array} Returns the picked elements.
- */
- function baseAt(object, paths) {
- var index = -1,
- length = paths.length,
- result = Array(length),
- skip = object == null;
- while (++index < length) {
- result[index] = skip ? undefined : get(object, paths[index]);
- }
- return result;
- }
- /**
- * The base implementation of `_.clamp` which doesn't coerce arguments.
- *
- * @private
- * @param {number} number The number to clamp.
- * @param {number} [lower] The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the clamped number.
- */
- function baseClamp(number, lower, upper) {
- if (number === number) {
- if (upper !== undefined) {
- number = number <= upper ? number : upper;
- }
- if (lower !== undefined) {
- number = number >= lower ? number : lower;
- }
- }
- return number;
- }
- /**
- * The base implementation of `_.clone` and `_.cloneDeep` which tracks
- * traversed objects.
- *
- * @private
- * @param {*} value The value to clone.
- * @param {boolean} bitmask The bitmask flags.
- * 1 - Deep clone
- * 2 - Flatten inherited properties
- * 4 - Clone symbols
- * @param {Function} [customizer] The function to customize cloning.
- * @param {string} [key] The key of `value`.
- * @param {Object} [object] The parent object of `value`.
- * @param {Object} [stack] Tracks traversed objects and their clone counterparts.
- * @returns {*} Returns the cloned value.
- */
- function baseClone(value, bitmask, customizer, key, object, stack) {
- var result,
- isDeep = bitmask & CLONE_DEEP_FLAG,
- isFlat = bitmask & CLONE_FLAT_FLAG,
- isFull = bitmask & CLONE_SYMBOLS_FLAG;
- if (customizer) {
- result = object ? customizer(value, key, object, stack) : customizer(value);
- }
- if (result !== undefined) {
- return result;
- }
- if (!isObject(value)) {
- return value;
- }
- var isArr = isArray(value);
- if (isArr) {
- result = initCloneArray(value);
- if (!isDeep) {
- return copyArray(value, result);
- }
- } else {
- var tag = getTag(value),
- isFunc = tag == funcTag || tag == genTag;
- if (isBuffer(value)) {
- return cloneBuffer(value, isDeep);
- }
- if (tag == objectTag || tag == argsTag || (isFunc && !object)) {
- result = (isFlat || isFunc) ? {} : initCloneObject(value);
- if (!isDeep) {
- return isFlat
- ? copySymbolsIn(value, baseAssignIn(result, value))
- : copySymbols(value, baseAssign(result, value));
- }
- } else {
- if (!cloneableTags[tag]) {
- return object ? value : {};
- }
- result = initCloneByTag(value, tag, isDeep);
- }
- }
- // Check for circular references and return its corresponding clone.
- stack || (stack = new Stack);
- var stacked = stack.get(value);
- if (stacked) {
- return stacked;
- }
- stack.set(value, result);
- if (isSet(value)) {
- value.forEach(function(subValue) {
- result.add(baseClone(subValue, bitmask, customizer, subValue, value, stack));
- });
- } else if (isMap(value)) {
- value.forEach(function(subValue, key) {
- result.set(key, baseClone(subValue, bitmask, customizer, key, value, stack));
- });
- }
- var keysFunc = isFull
- ? (isFlat ? getAllKeysIn : getAllKeys)
- : (isFlat ? keysIn : keys);
- var props = isArr ? undefined : keysFunc(value);
- arrayEach(props || value, function(subValue, key) {
- if (props) {
- key = subValue;
- subValue = value[key];
- }
- // Recursively populate clone (susceptible to call stack limits).
- assignValue(result, key, baseClone(subValue, bitmask, customizer, key, value, stack));
- });
- return result;
- }
- /**
- * The base implementation of `_.conforms` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property predicates to conform to.
- * @returns {Function} Returns the new spec function.
- */
- function baseConforms(source) {
- var props = keys(source);
- return function(object) {
- return baseConformsTo(object, source, props);
- };
- }
- /**
- * The base implementation of `_.conformsTo` which accepts `props` to check.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property predicates to conform to.
- * @returns {boolean} Returns `true` if `object` conforms, else `false`.
- */
- function baseConformsTo(object, source, props) {
- var length = props.length;
- if (object == null) {
- return !length;
- }
- object = Object(object);
- while (length--) {
- var key = props[length],
- predicate = source[key],
- value = object[key];
- if ((value === undefined && !(key in object)) || !predicate(value)) {
- return false;
- }
- }
- return true;
- }
- /**
- * The base implementation of `_.delay` and `_.defer` which accepts `args`
- * to provide to `func`.
- *
- * @private
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {Array} args The arguments to provide to `func`.
- * @returns {number|Object} Returns the timer id or timeout object.
- */
- function baseDelay(func, wait, args) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return setTimeout(function() { func.apply(undefined, args); }, wait);
- }
- /**
- * The base implementation of methods like `_.difference` without support
- * for excluding multiple arrays or iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Array} values The values to exclude.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- */
- function baseDifference(array, values, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- isCommon = true,
- length = array.length,
- result = [],
- valuesLength = values.length;
- if (!length) {
- return result;
- }
- if (iteratee) {
- values = arrayMap(values, baseUnary(iteratee));
- }
- if (comparator) {
- includes = arrayIncludesWith;
- isCommon = false;
- }
- else if (values.length >= LARGE_ARRAY_SIZE) {
- includes = cacheHas;
- isCommon = false;
- values = new SetCache(values);
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee == null ? value : iteratee(value);
- value = (comparator || value !== 0) ? value : 0;
- if (isCommon && computed === computed) {
- var valuesIndex = valuesLength;
- while (valuesIndex--) {
- if (values[valuesIndex] === computed) {
- continue outer;
- }
- }
- result.push(value);
- }
- else if (!includes(values, computed, comparator)) {
- result.push(value);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.forEach` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEach = createBaseEach(baseForOwn);
- /**
- * The base implementation of `_.forEachRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- */
- var baseEachRight = createBaseEach(baseForOwnRight, true);
- /**
- * The base implementation of `_.every` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`
- */
- function baseEvery(collection, predicate) {
- var result = true;
- baseEach(collection, function(value, index, collection) {
- result = !!predicate(value, index, collection);
- return result;
- });
- return result;
- }
- /**
- * The base implementation of methods like `_.max` and `_.min` which accepts a
- * `comparator` to determine the extremum value.
- *
- * @private
- * @param {Array} array The array to iterate over.
- * @param {Function} iteratee The iteratee invoked per iteration.
- * @param {Function} comparator The comparator used to compare values.
- * @returns {*} Returns the extremum value.
- */
- function baseExtremum(array, iteratee, comparator) {
- var index = -1,
- length = array.length;
- while (++index < length) {
- var value = array[index],
- current = iteratee(value);
- if (current != null && (computed === undefined
- ? (current === current && !isSymbol(current))
- : comparator(current, computed)
- )) {
- var computed = current,
- result = value;
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.fill` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- */
- function baseFill(array, value, start, end) {
- var length = array.length;
- start = toInteger(start);
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = (end === undefined || end > length) ? length : toInteger(end);
- if (end < 0) {
- end += length;
- }
- end = start > end ? 0 : toLength(end);
- while (start < end) {
- array[start++] = value;
- }
- return array;
- }
- /**
- * The base implementation of `_.filter` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- */
- function baseFilter(collection, predicate) {
- var result = [];
- baseEach(collection, function(value, index, collection) {
- if (predicate(value, index, collection)) {
- result.push(value);
- }
- });
- return result;
- }
- /**
- * The base implementation of `_.flatten` with support for restricting flattening.
- *
- * @private
- * @param {Array} array The array to flatten.
- * @param {number} depth The maximum recursion depth.
- * @param {boolean} [predicate=isFlattenable] The function invoked per iteration.
- * @param {boolean} [isStrict] Restrict to values that pass `predicate` checks.
- * @param {Array} [result=[]] The initial result value.
- * @returns {Array} Returns the new flattened array.
- */
- function baseFlatten(array, depth, predicate, isStrict, result) {
- var index = -1,
- length = array.length;
- predicate || (predicate = isFlattenable);
- result || (result = []);
- while (++index < length) {
- var value = array[index];
- if (depth > 0 && predicate(value)) {
- if (depth > 1) {
- // Recursively flatten arrays (susceptible to call stack limits).
- baseFlatten(value, depth - 1, predicate, isStrict, result);
- } else {
- arrayPush(result, value);
- }
- } else if (!isStrict) {
- result[result.length] = value;
- }
- }
- return result;
- }
- /**
- * The base implementation of `baseForOwn` which iterates over `object`
- * properties returned by `keysFunc` and invokes `iteratee` for each property.
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseFor = createBaseFor();
- /**
- * This function is like `baseFor` except that it iterates over properties
- * in the opposite order.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @returns {Object} Returns `object`.
- */
- var baseForRight = createBaseFor(true);
- /**
- * The base implementation of `_.forOwn` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwn(object, iteratee) {
- return object && baseFor(object, iteratee, keys);
- }
- /**
- * The base implementation of `_.forOwnRight` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Object} Returns `object`.
- */
- function baseForOwnRight(object, iteratee) {
- return object && baseForRight(object, iteratee, keys);
- }
- /**
- * The base implementation of `_.functions` which creates an array of
- * `object` function property names filtered from `props`.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Array} props The property names to filter.
- * @returns {Array} Returns the function names.
- */
- function baseFunctions(object, props) {
- return arrayFilter(props, function(key) {
- return isFunction(object[key]);
- });
- }
- /**
- * The base implementation of `_.get` without support for default values.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to get.
- * @returns {*} Returns the resolved value.
- */
- function baseGet(object, path) {
- path = castPath(path, object);
- var index = 0,
- length = path.length;
- while (object != null && index < length) {
- object = object[toKey(path[index++])];
- }
- return (index && index == length) ? object : undefined;
- }
- /**
- * The base implementation of `getAllKeys` and `getAllKeysIn` which uses
- * `keysFunc` and `symbolsFunc` to get the enumerable property names and
- * symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Function} keysFunc The function to get the keys of `object`.
- * @param {Function} symbolsFunc The function to get the symbols of `object`.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function baseGetAllKeys(object, keysFunc, symbolsFunc) {
- var result = keysFunc(object);
- return isArray(object) ? result : arrayPush(result, symbolsFunc(object));
- }
- /**
- * The base implementation of `getTag` without fallbacks for buggy environments.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
- function baseGetTag(value) {
- if (value == null) {
- return value === undefined ? undefinedTag : nullTag;
- }
- return (symToStringTag && symToStringTag in Object(value))
- ? getRawTag(value)
- : objectToString(value);
- }
- /**
- * The base implementation of `_.gt` which doesn't coerce arguments.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than `other`,
- * else `false`.
- */
- function baseGt(value, other) {
- return value > other;
- }
- /**
- * The base implementation of `_.has` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHas(object, key) {
- return object != null && hasOwnProperty.call(object, key);
- }
- /**
- * The base implementation of `_.hasIn` without support for deep paths.
- *
- * @private
- * @param {Object} [object] The object to query.
- * @param {Array|string} key The key to check.
- * @returns {boolean} Returns `true` if `key` exists, else `false`.
- */
- function baseHasIn(object, key) {
- return object != null && key in Object(object);
- }
- /**
- * The base implementation of `_.inRange` which doesn't coerce arguments.
- *
- * @private
- * @param {number} number The number to check.
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
- */
- function baseInRange(number, start, end) {
- return number >= nativeMin(start, end) && number < nativeMax(start, end);
- }
- /**
- * The base implementation of methods like `_.intersection`, without support
- * for iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of shared values.
- */
- function baseIntersection(arrays, iteratee, comparator) {
- var includes = comparator ? arrayIncludesWith : arrayIncludes,
- length = arrays[0].length,
- othLength = arrays.length,
- othIndex = othLength,
- caches = Array(othLength),
- maxLength = Infinity,
- result = [];
- while (othIndex--) {
- var array = arrays[othIndex];
- if (othIndex && iteratee) {
- array = arrayMap(array, baseUnary(iteratee));
- }
- maxLength = nativeMin(array.length, maxLength);
- caches[othIndex] = !comparator && (iteratee || (length >= 120 && array.length >= 120))
- ? new SetCache(othIndex && array)
- : undefined;
- }
- array = arrays[0];
- var index = -1,
- seen = caches[0];
- outer:
- while (++index < length && result.length < maxLength) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
- value = (comparator || value !== 0) ? value : 0;
- if (!(seen
- ? cacheHas(seen, computed)
- : includes(result, computed, comparator)
- )) {
- othIndex = othLength;
- while (--othIndex) {
- var cache = caches[othIndex];
- if (!(cache
- ? cacheHas(cache, computed)
- : includes(arrays[othIndex], computed, comparator))
- ) {
- continue outer;
- }
- }
- if (seen) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.invert` and `_.invertBy` which inverts
- * `object` with values transformed by `iteratee` and set by `setter`.
- *
- * @private
- * @param {Object} object The object to iterate over.
- * @param {Function} setter The function to set `accumulator` values.
- * @param {Function} iteratee The iteratee to transform values.
- * @param {Object} accumulator The initial inverted object.
- * @returns {Function} Returns `accumulator`.
- */
- function baseInverter(object, setter, iteratee, accumulator) {
- baseForOwn(object, function(value, key, object) {
- setter(accumulator, iteratee(value), key, object);
- });
- return accumulator;
- }
- /**
- * The base implementation of `_.invoke` without support for individual
- * method arguments.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the method to invoke.
- * @param {Array} args The arguments to invoke the method with.
- * @returns {*} Returns the result of the invoked method.
- */
- function baseInvoke(object, path, args) {
- path = castPath(path, object);
- object = parent(object, path);
- var func = object == null ? object : object[toKey(last(path))];
- return func == null ? undefined : apply(func, object, args);
- }
- /**
- * The base implementation of `_.isArguments`.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an `arguments` object,
- */
- function baseIsArguments(value) {
- return isObjectLike(value) && baseGetTag(value) == argsTag;
- }
- /**
- * The base implementation of `_.isArrayBuffer` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
- */
- function baseIsArrayBuffer(value) {
- return isObjectLike(value) && baseGetTag(value) == arrayBufferTag;
- }
- /**
- * The base implementation of `_.isDate` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
- */
- function baseIsDate(value) {
- return isObjectLike(value) && baseGetTag(value) == dateTag;
- }
- /**
- * The base implementation of `_.isEqual` which supports partial comparisons
- * and tracks traversed objects.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @param {boolean} bitmask The bitmask flags.
- * 1 - Unordered comparison
- * 2 - Partial comparison
- * @param {Function} [customizer] The function to customize comparisons.
- * @param {Object} [stack] Tracks traversed `value` and `other` objects.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- */
- function baseIsEqual(value, other, bitmask, customizer, stack) {
- if (value === other) {
- return true;
- }
- if (value == null || other == null || (!isObjectLike(value) && !isObjectLike(other))) {
- return value !== value && other !== other;
- }
- return baseIsEqualDeep(value, other, bitmask, customizer, baseIsEqual, stack);
- }
- /**
- * A specialized version of `baseIsEqual` for arrays and objects which performs
- * deep comparisons and tracks traversed objects enabling objects with circular
- * references to be compared.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
- * @param {Function} customizer The function to customize comparisons.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Object} [stack] Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function baseIsEqualDeep(object, other, bitmask, customizer, equalFunc, stack) {
- var objIsArr = isArray(object),
- othIsArr = isArray(other),
- objTag = objIsArr ? arrayTag : getTag(object),
- othTag = othIsArr ? arrayTag : getTag(other);
- objTag = objTag == argsTag ? objectTag : objTag;
- othTag = othTag == argsTag ? objectTag : othTag;
- var objIsObj = objTag == objectTag,
- othIsObj = othTag == objectTag,
- isSameTag = objTag == othTag;
- if (isSameTag && isBuffer(object)) {
- if (!isBuffer(other)) {
- return false;
- }
- objIsArr = true;
- objIsObj = false;
- }
- if (isSameTag && !objIsObj) {
- stack || (stack = new Stack);
- return (objIsArr || isTypedArray(object))
- ? equalArrays(object, other, bitmask, customizer, equalFunc, stack)
- : equalByTag(object, other, objTag, bitmask, customizer, equalFunc, stack);
- }
- if (!(bitmask & COMPARE_PARTIAL_FLAG)) {
- var objIsWrapped = objIsObj && hasOwnProperty.call(object, '__wrapped__'),
- othIsWrapped = othIsObj && hasOwnProperty.call(other, '__wrapped__');
- if (objIsWrapped || othIsWrapped) {
- var objUnwrapped = objIsWrapped ? object.value() : object,
- othUnwrapped = othIsWrapped ? other.value() : other;
- stack || (stack = new Stack);
- return equalFunc(objUnwrapped, othUnwrapped, bitmask, customizer, stack);
- }
- }
- if (!isSameTag) {
- return false;
- }
- stack || (stack = new Stack);
- return equalObjects(object, other, bitmask, customizer, equalFunc, stack);
- }
- /**
- * The base implementation of `_.isMap` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a map, else `false`.
- */
- function baseIsMap(value) {
- return isObjectLike(value) && getTag(value) == mapTag;
- }
- /**
- * The base implementation of `_.isMatch` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @param {Array} matchData The property names, values, and compare flags to match.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
- */
- function baseIsMatch(object, source, matchData, customizer) {
- var index = matchData.length,
- length = index,
- noCustomizer = !customizer;
- if (object == null) {
- return !length;
- }
- object = Object(object);
- while (index--) {
- var data = matchData[index];
- if ((noCustomizer && data[2])
- ? data[1] !== object[data[0]]
- : !(data[0] in object)
- ) {
- return false;
- }
- }
- while (++index < length) {
- data = matchData[index];
- var key = data[0],
- objValue = object[key],
- srcValue = data[1];
- if (noCustomizer && data[2]) {
- if (objValue === undefined && !(key in object)) {
- return false;
- }
- } else {
- var stack = new Stack;
- if (customizer) {
- var result = customizer(objValue, srcValue, key, object, source, stack);
- }
- if (!(result === undefined
- ? baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG, customizer, stack)
- : result
- )) {
- return false;
- }
- }
- }
- return true;
- }
- /**
- * The base implementation of `_.isNative` without bad shim checks.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
- * else `false`.
- */
- function baseIsNative(value) {
- if (!isObject(value) || isMasked(value)) {
- return false;
- }
- var pattern = isFunction(value) ? reIsNative : reIsHostCtor;
- return pattern.test(toSource(value));
- }
- /**
- * The base implementation of `_.isRegExp` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
- */
- function baseIsRegExp(value) {
- return isObjectLike(value) && baseGetTag(value) == regexpTag;
- }
- /**
- * The base implementation of `_.isSet` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a set, else `false`.
- */
- function baseIsSet(value) {
- return isObjectLike(value) && getTag(value) == setTag;
- }
- /**
- * The base implementation of `_.isTypedArray` without Node.js optimizations.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
- */
- function baseIsTypedArray(value) {
- return isObjectLike(value) &&
- isLength(value.length) && !!typedArrayTags[baseGetTag(value)];
- }
- /**
- * The base implementation of `_.iteratee`.
- *
- * @private
- * @param {*} [value=_.identity] The value to convert to an iteratee.
- * @returns {Function} Returns the iteratee.
- */
- function baseIteratee(value) {
- // Don't store the `typeof` result in a variable to avoid a JIT bug in Safari 9.
- // See https://bugs.webkit.org/show_bug.cgi?id=156034 for more details.
- if (typeof value == 'function') {
- return value;
- }
- if (value == null) {
- return identity;
- }
- if (typeof value == 'object') {
- return isArray(value)
- ? baseMatchesProperty(value[0], value[1])
- : baseMatches(value);
- }
- return property(value);
- }
- /**
- * The base implementation of `_.keys` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeys(object) {
- if (!isPrototype(object)) {
- return nativeKeys(object);
- }
- var result = [];
- for (var key in Object(object)) {
- if (hasOwnProperty.call(object, key) && key != 'constructor') {
- result.push(key);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.keysIn` which doesn't treat sparse arrays as dense.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function baseKeysIn(object) {
- if (!isObject(object)) {
- return nativeKeysIn(object);
- }
- var isProto = isPrototype(object),
- result = [];
- for (var key in object) {
- if (!(key == 'constructor' && (isProto || !hasOwnProperty.call(object, key)))) {
- result.push(key);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.lt` which doesn't coerce arguments.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than `other`,
- * else `false`.
- */
- function baseLt(value, other) {
- return value < other;
- }
- /**
- * The base implementation of `_.map` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} iteratee The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- */
- function baseMap(collection, iteratee) {
- var index = -1,
- result = isArrayLike(collection) ? Array(collection.length) : [];
- baseEach(collection, function(value, key, collection) {
- result[++index] = iteratee(value, key, collection);
- });
- return result;
- }
- /**
- * The base implementation of `_.matches` which doesn't clone `source`.
- *
- * @private
- * @param {Object} source The object of property values to match.
- * @returns {Function} Returns the new spec function.
- */
- function baseMatches(source) {
- var matchData = getMatchData(source);
- if (matchData.length == 1 && matchData[0][2]) {
- return matchesStrictComparable(matchData[0][0], matchData[0][1]);
- }
- return function(object) {
- return object === source || baseIsMatch(object, source, matchData);
- };
- }
- /**
- * The base implementation of `_.matchesProperty` which doesn't clone `srcValue`.
- *
- * @private
- * @param {string} path The path of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new spec function.
- */
- function baseMatchesProperty(path, srcValue) {
- if (isKey(path) && isStrictComparable(srcValue)) {
- return matchesStrictComparable(toKey(path), srcValue);
- }
- return function(object) {
- var objValue = get(object, path);
- return (objValue === undefined && objValue === srcValue)
- ? hasIn(object, path)
- : baseIsEqual(srcValue, objValue, COMPARE_PARTIAL_FLAG | COMPARE_UNORDERED_FLAG);
- };
- }
- /**
- * The base implementation of `_.merge` without support for multiple sources.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} [customizer] The function to customize merged values.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- */
- function baseMerge(object, source, srcIndex, customizer, stack) {
- if (object === source) {
- return;
- }
- baseFor(source, function(srcValue, key) {
- stack || (stack = new Stack);
- if (isObject(srcValue)) {
- baseMergeDeep(object, source, key, srcIndex, baseMerge, customizer, stack);
- }
- else {
- var newValue = customizer
- ? customizer(safeGet(object, key), srcValue, (key + ''), object, source, stack)
- : undefined;
- if (newValue === undefined) {
- newValue = srcValue;
- }
- assignMergeValue(object, key, newValue);
- }
- }, keysIn);
- }
- /**
- * A specialized version of `baseMerge` for arrays and objects which performs
- * deep merges and tracks traversed objects enabling objects with circular
- * references to be merged.
- *
- * @private
- * @param {Object} object The destination object.
- * @param {Object} source The source object.
- * @param {string} key The key of the value to merge.
- * @param {number} srcIndex The index of `source`.
- * @param {Function} mergeFunc The function to merge values.
- * @param {Function} [customizer] The function to customize assigned values.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- */
- function baseMergeDeep(object, source, key, srcIndex, mergeFunc, customizer, stack) {
- var objValue = safeGet(object, key),
- srcValue = safeGet(source, key),
- stacked = stack.get(srcValue);
- if (stacked) {
- assignMergeValue(object, key, stacked);
- return;
- }
- var newValue = customizer
- ? customizer(objValue, srcValue, (key + ''), object, source, stack)
- : undefined;
- var isCommon = newValue === undefined;
- if (isCommon) {
- var isArr = isArray(srcValue),
- isBuff = !isArr && isBuffer(srcValue),
- isTyped = !isArr && !isBuff && isTypedArray(srcValue);
- newValue = srcValue;
- if (isArr || isBuff || isTyped) {
- if (isArray(objValue)) {
- newValue = objValue;
- }
- else if (isArrayLikeObject(objValue)) {
- newValue = copyArray(objValue);
- }
- else if (isBuff) {
- isCommon = false;
- newValue = cloneBuffer(srcValue, true);
- }
- else if (isTyped) {
- isCommon = false;
- newValue = cloneTypedArray(srcValue, true);
- }
- else {
- newValue = [];
- }
- }
- else if (isPlainObject(srcValue) || isArguments(srcValue)) {
- newValue = objValue;
- if (isArguments(objValue)) {
- newValue = toPlainObject(objValue);
- }
- else if (!isObject(objValue) || isFunction(objValue)) {
- newValue = initCloneObject(srcValue);
- }
- }
- else {
- isCommon = false;
- }
- }
- if (isCommon) {
- // Recursively merge objects and arrays (susceptible to call stack limits).
- stack.set(srcValue, newValue);
- mergeFunc(newValue, srcValue, srcIndex, customizer, stack);
- stack['delete'](srcValue);
- }
- assignMergeValue(object, key, newValue);
- }
- /**
- * The base implementation of `_.nth` which doesn't coerce arguments.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {number} n The index of the element to return.
- * @returns {*} Returns the nth element of `array`.
- */
- function baseNth(array, n) {
- var length = array.length;
- if (!length) {
- return;
- }
- n += n < 0 ? length : 0;
- return isIndex(n, length) ? array[n] : undefined;
- }
- /**
- * The base implementation of `_.orderBy` without param guards.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function[]|Object[]|string[]} iteratees The iteratees to sort by.
- * @param {string[]} orders The sort orders of `iteratees`.
- * @returns {Array} Returns the new sorted array.
- */
- function baseOrderBy(collection, iteratees, orders) {
- if (iteratees.length) {
- iteratees = arrayMap(iteratees, function(iteratee) {
- if (isArray(iteratee)) {
- return function(value) {
- return baseGet(value, iteratee.length === 1 ? iteratee[0] : iteratee);
- }
- }
- return iteratee;
- });
- } else {
- iteratees = [identity];
- }
- var index = -1;
- iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
- var result = baseMap(collection, function(value, key, collection) {
- var criteria = arrayMap(iteratees, function(iteratee) {
- return iteratee(value);
- });
- return { 'criteria': criteria, 'index': ++index, 'value': value };
- });
- return baseSortBy(result, function(object, other) {
- return compareMultiple(object, other, orders);
- });
- }
- /**
- * The base implementation of `_.pick` without support for individual
- * property identifiers.
- *
- * @private
- * @param {Object} object The source object.
- * @param {string[]} paths The property paths to pick.
- * @returns {Object} Returns the new object.
- */
- function basePick(object, paths) {
- return basePickBy(object, paths, function(value, path) {
- return hasIn(object, path);
- });
- }
- /**
- * The base implementation of `_.pickBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Object} object The source object.
- * @param {string[]} paths The property paths to pick.
- * @param {Function} predicate The function invoked per property.
- * @returns {Object} Returns the new object.
- */
- function basePickBy(object, paths, predicate) {
- var index = -1,
- length = paths.length,
- result = {};
- while (++index < length) {
- var path = paths[index],
- value = baseGet(object, path);
- if (predicate(value, path)) {
- baseSet(result, castPath(path, object), value);
- }
- }
- return result;
- }
- /**
- * A specialized version of `baseProperty` which supports deep paths.
- *
- * @private
- * @param {Array|string} path The path of the property to get.
- * @returns {Function} Returns the new accessor function.
- */
- function basePropertyDeep(path) {
- return function(object) {
- return baseGet(object, path);
- };
- }
- /**
- * The base implementation of `_.pullAllBy` without support for iteratee
- * shorthands.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- */
- function basePullAll(array, values, iteratee, comparator) {
- var indexOf = comparator ? baseIndexOfWith : baseIndexOf,
- index = -1,
- length = values.length,
- seen = array;
- if (array === values) {
- values = copyArray(values);
- }
- if (iteratee) {
- seen = arrayMap(array, baseUnary(iteratee));
- }
- while (++index < length) {
- var fromIndex = 0,
- value = values[index],
- computed = iteratee ? iteratee(value) : value;
- while ((fromIndex = indexOf(seen, computed, fromIndex, comparator)) > -1) {
- if (seen !== array) {
- splice.call(seen, fromIndex, 1);
- }
- splice.call(array, fromIndex, 1);
- }
- }
- return array;
- }
- /**
- * The base implementation of `_.pullAt` without support for individual
- * indexes or capturing the removed elements.
- *
- * @private
- * @param {Array} array The array to modify.
- * @param {number[]} indexes The indexes of elements to remove.
- * @returns {Array} Returns `array`.
- */
- function basePullAt(array, indexes) {
- var length = array ? indexes.length : 0,
- lastIndex = length - 1;
- while (length--) {
- var index = indexes[length];
- if (length == lastIndex || index !== previous) {
- var previous = index;
- if (isIndex(index)) {
- splice.call(array, index, 1);
- } else {
- baseUnset(array, index);
- }
- }
- }
- return array;
- }
- /**
- * The base implementation of `_.random` without support for returning
- * floating-point numbers.
- *
- * @private
- * @param {number} lower The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the random number.
- */
- function baseRandom(lower, upper) {
- return lower + nativeFloor(nativeRandom() * (upper - lower + 1));
- }
- /**
- * The base implementation of `_.range` and `_.rangeRight` which doesn't
- * coerce arguments.
- *
- * @private
- * @param {number} start The start of the range.
- * @param {number} end The end of the range.
- * @param {number} step The value to increment or decrement by.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the range of numbers.
- */
- function baseRange(start, end, step, fromRight) {
- var index = -1,
- length = nativeMax(nativeCeil((end - start) / (step || 1)), 0),
- result = Array(length);
- while (length--) {
- result[fromRight ? length : ++index] = start;
- start += step;
- }
- return result;
- }
- /**
- * The base implementation of `_.repeat` which doesn't coerce arguments.
- *
- * @private
- * @param {string} string The string to repeat.
- * @param {number} n The number of times to repeat the string.
- * @returns {string} Returns the repeated string.
- */
- function baseRepeat(string, n) {
- var result = '';
- if (!string || n < 1 || n > MAX_SAFE_INTEGER) {
- return result;
- }
- // Leverage the exponentiation by squaring algorithm for a faster repeat.
- // See https://en.wikipedia.org/wiki/Exponentiation_by_squaring for more details.
- do {
- if (n % 2) {
- result += string;
- }
- n = nativeFloor(n / 2);
- if (n) {
- string += string;
- }
- } while (n);
- return result;
- }
- /**
- * The base implementation of `_.rest` which doesn't validate or coerce arguments.
- *
- * @private
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @returns {Function} Returns the new function.
- */
- function baseRest(func, start) {
- return setToString(overRest(func, start, identity), func + '');
- }
- /**
- * The base implementation of `_.sample`.
- *
- * @private
- * @param {Array|Object} collection The collection to sample.
- * @returns {*} Returns the random element.
- */
- function baseSample(collection) {
- return arraySample(values(collection));
- }
- /**
- * The base implementation of `_.sampleSize` without param guards.
- *
- * @private
- * @param {Array|Object} collection The collection to sample.
- * @param {number} n The number of elements to sample.
- * @returns {Array} Returns the random elements.
- */
- function baseSampleSize(collection, n) {
- var array = values(collection);
- return shuffleSelf(array, baseClamp(n, 0, array.length));
- }
- /**
- * The base implementation of `_.set`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseSet(object, path, value, customizer) {
- if (!isObject(object)) {
- return object;
- }
- path = castPath(path, object);
- var index = -1,
- length = path.length,
- lastIndex = length - 1,
- nested = object;
- while (nested != null && ++index < length) {
- var key = toKey(path[index]),
- newValue = value;
- if (key === '__proto__' || key === 'constructor' || key === 'prototype') {
- return object;
- }
- if (index != lastIndex) {
- var objValue = nested[key];
- newValue = customizer ? customizer(objValue, key, nested) : undefined;
- if (newValue === undefined) {
- newValue = isObject(objValue)
- ? objValue
- : (isIndex(path[index + 1]) ? [] : {});
- }
- }
- assignValue(nested, key, newValue);
- nested = nested[key];
- }
- return object;
- }
- /**
- * The base implementation of `setData` without support for hot loop shorting.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var baseSetData = !metaMap ? identity : function(func, data) {
- metaMap.set(func, data);
- return func;
- };
- /**
- * The base implementation of `setToString` without support for hot loop shorting.
- *
- * @private
- * @param {Function} func The function to modify.
- * @param {Function} string The `toString` result.
- * @returns {Function} Returns `func`.
- */
- var baseSetToString = !defineProperty ? identity : function(func, string) {
- return defineProperty(func, 'toString', {
- 'configurable': true,
- 'enumerable': false,
- 'value': constant(string),
- 'writable': true
- });
- };
- /**
- * The base implementation of `_.shuffle`.
- *
- * @private
- * @param {Array|Object} collection The collection to shuffle.
- * @returns {Array} Returns the new shuffled array.
- */
- function baseShuffle(collection) {
- return shuffleSelf(values(collection));
- }
- /**
- * The base implementation of `_.slice` without an iteratee call guard.
- *
- * @private
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseSlice(array, start, end) {
- var index = -1,
- length = array.length;
- if (start < 0) {
- start = -start > length ? 0 : (length + start);
- }
- end = end > length ? length : end;
- if (end < 0) {
- end += length;
- }
- length = start > end ? 0 : ((end - start) >>> 0);
- start >>>= 0;
- var result = Array(length);
- while (++index < length) {
- result[index] = array[index + start];
- }
- return result;
- }
- /**
- * The base implementation of `_.some` without support for iteratee shorthands.
- *
- * @private
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} predicate The function invoked per iteration.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- */
- function baseSome(collection, predicate) {
- var result;
- baseEach(collection, function(value, index, collection) {
- result = predicate(value, index, collection);
- return !result;
- });
- return !!result;
- }
- /**
- * The base implementation of `_.sortedIndex` and `_.sortedLastIndex` which
- * performs a binary search of `array` to determine the index at which `value`
- * should be inserted into `array` in order to maintain its sort order.
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- */
- function baseSortedIndex(array, value, retHighest) {
- var low = 0,
- high = array == null ? low : array.length;
- if (typeof value == 'number' && value === value && high <= HALF_MAX_ARRAY_LENGTH) {
- while (low < high) {
- var mid = (low + high) >>> 1,
- computed = array[mid];
- if (computed !== null && !isSymbol(computed) &&
- (retHighest ? (computed <= value) : (computed < value))) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return high;
- }
- return baseSortedIndexBy(array, value, identity, retHighest);
- }
- /**
- * The base implementation of `_.sortedIndexBy` and `_.sortedLastIndexBy`
- * which invokes `iteratee` for `value` and each element of `array` to compute
- * their sort ranking. The iteratee is invoked with one argument; (value).
- *
- * @private
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} iteratee The iteratee invoked per element.
- * @param {boolean} [retHighest] Specify returning the highest qualified index.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- */
- function baseSortedIndexBy(array, value, iteratee, retHighest) {
- var low = 0,
- high = array == null ? 0 : array.length;
- if (high === 0) {
- return 0;
- }
- value = iteratee(value);
- var valIsNaN = value !== value,
- valIsNull = value === null,
- valIsSymbol = isSymbol(value),
- valIsUndefined = value === undefined;
- while (low < high) {
- var mid = nativeFloor((low + high) / 2),
- computed = iteratee(array[mid]),
- othIsDefined = computed !== undefined,
- othIsNull = computed === null,
- othIsReflexive = computed === computed,
- othIsSymbol = isSymbol(computed);
- if (valIsNaN) {
- var setLow = retHighest || othIsReflexive;
- } else if (valIsUndefined) {
- setLow = othIsReflexive && (retHighest || othIsDefined);
- } else if (valIsNull) {
- setLow = othIsReflexive && othIsDefined && (retHighest || !othIsNull);
- } else if (valIsSymbol) {
- setLow = othIsReflexive && othIsDefined && !othIsNull && (retHighest || !othIsSymbol);
- } else if (othIsNull || othIsSymbol) {
- setLow = false;
- } else {
- setLow = retHighest ? (computed <= value) : (computed < value);
- }
- if (setLow) {
- low = mid + 1;
- } else {
- high = mid;
- }
- }
- return nativeMin(high, MAX_ARRAY_INDEX);
- }
- /**
- * The base implementation of `_.sortedUniq` and `_.sortedUniqBy` without
- * support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseSortedUniq(array, iteratee) {
- var index = -1,
- length = array.length,
- resIndex = 0,
- result = [];
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
- if (!index || !eq(computed, seen)) {
- var seen = computed;
- result[resIndex++] = value === 0 ? 0 : value;
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.toNumber` which doesn't ensure correct
- * conversions of binary, hexadecimal, or octal string values.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {number} Returns the number.
- */
- function baseToNumber(value) {
- if (typeof value == 'number') {
- return value;
- }
- if (isSymbol(value)) {
- return NAN;
- }
- return +value;
- }
- /**
- * The base implementation of `_.toString` which doesn't convert nullish
- * values to empty strings.
- *
- * @private
- * @param {*} value The value to process.
- * @returns {string} Returns the string.
- */
- function baseToString(value) {
- // Exit early for strings to avoid a performance hit in some environments.
- if (typeof value == 'string') {
- return value;
- }
- if (isArray(value)) {
- // Recursively convert values (susceptible to call stack limits).
- return arrayMap(value, baseToString) + '';
- }
- if (isSymbol(value)) {
- return symbolToString ? symbolToString.call(value) : '';
- }
- var result = (value + '');
- return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
- }
- /**
- * The base implementation of `_.uniqBy` without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- */
- function baseUniq(array, iteratee, comparator) {
- var index = -1,
- includes = arrayIncludes,
- length = array.length,
- isCommon = true,
- result = [],
- seen = result;
- if (comparator) {
- isCommon = false;
- includes = arrayIncludesWith;
- }
- else if (length >= LARGE_ARRAY_SIZE) {
- var set = iteratee ? null : createSet(array);
- if (set) {
- return setToArray(set);
- }
- isCommon = false;
- includes = cacheHas;
- seen = new SetCache;
- }
- else {
- seen = iteratee ? [] : result;
- }
- outer:
- while (++index < length) {
- var value = array[index],
- computed = iteratee ? iteratee(value) : value;
- value = (comparator || value !== 0) ? value : 0;
- if (isCommon && computed === computed) {
- var seenIndex = seen.length;
- while (seenIndex--) {
- if (seen[seenIndex] === computed) {
- continue outer;
- }
- }
- if (iteratee) {
- seen.push(computed);
- }
- result.push(value);
- }
- else if (!includes(seen, computed, comparator)) {
- if (seen !== result) {
- seen.push(computed);
- }
- result.push(value);
- }
- }
- return result;
- }
- /**
- * The base implementation of `_.unset`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The property path to unset.
- * @returns {boolean} Returns `true` if the property is deleted, else `false`.
- */
- function baseUnset(object, path) {
- path = castPath(path, object);
- object = parent(object, path);
- return object == null || delete object[toKey(last(path))];
- }
- /**
- * The base implementation of `_.update`.
- *
- * @private
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to update.
- * @param {Function} updater The function to produce the updated value.
- * @param {Function} [customizer] The function to customize path creation.
- * @returns {Object} Returns `object`.
- */
- function baseUpdate(object, path, updater, customizer) {
- return baseSet(object, path, updater(baseGet(object, path)), customizer);
- }
- /**
- * The base implementation of methods like `_.dropWhile` and `_.takeWhile`
- * without support for iteratee shorthands.
- *
- * @private
- * @param {Array} array The array to query.
- * @param {Function} predicate The function invoked per iteration.
- * @param {boolean} [isDrop] Specify dropping elements instead of taking them.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Array} Returns the slice of `array`.
- */
- function baseWhile(array, predicate, isDrop, fromRight) {
- var length = array.length,
- index = fromRight ? length : -1;
- while ((fromRight ? index-- : ++index < length) &&
- predicate(array[index], index, array)) {}
- return isDrop
- ? baseSlice(array, (fromRight ? 0 : index), (fromRight ? index + 1 : length))
- : baseSlice(array, (fromRight ? index + 1 : 0), (fromRight ? length : index));
- }
- /**
- * The base implementation of `wrapperValue` which returns the result of
- * performing a sequence of actions on the unwrapped `value`, where each
- * successive action is supplied the return value of the previous.
- *
- * @private
- * @param {*} value The unwrapped value.
- * @param {Array} actions Actions to perform to resolve the unwrapped value.
- * @returns {*} Returns the resolved value.
- */
- function baseWrapperValue(value, actions) {
- var result = value;
- if (result instanceof LazyWrapper) {
- result = result.value();
- }
- return arrayReduce(actions, function(result, action) {
- return action.func.apply(action.thisArg, arrayPush([result], action.args));
- }, result);
- }
- /**
- * The base implementation of methods like `_.xor`, without support for
- * iteratee shorthands, that accepts an array of arrays to inspect.
- *
- * @private
- * @param {Array} arrays The arrays to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of values.
- */
- function baseXor(arrays, iteratee, comparator) {
- var length = arrays.length;
- if (length < 2) {
- return length ? baseUniq(arrays[0]) : [];
- }
- var index = -1,
- result = Array(length);
- while (++index < length) {
- var array = arrays[index],
- othIndex = -1;
- while (++othIndex < length) {
- if (othIndex != index) {
- result[index] = baseDifference(result[index] || array, arrays[othIndex], iteratee, comparator);
- }
- }
- }
- return baseUniq(baseFlatten(result, 1), iteratee, comparator);
- }
- /**
- * This base implementation of `_.zipObject` which assigns values using `assignFunc`.
- *
- * @private
- * @param {Array} props The property identifiers.
- * @param {Array} values The property values.
- * @param {Function} assignFunc The function to assign values.
- * @returns {Object} Returns the new object.
- */
- function baseZipObject(props, values, assignFunc) {
- var index = -1,
- length = props.length,
- valsLength = values.length,
- result = {};
- while (++index < length) {
- var value = index < valsLength ? values[index] : undefined;
- assignFunc(result, props[index], value);
- }
- return result;
- }
- /**
- * Casts `value` to an empty array if it's not an array like object.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Array|Object} Returns the cast array-like object.
- */
- function castArrayLikeObject(value) {
- return isArrayLikeObject(value) ? value : [];
- }
- /**
- * Casts `value` to `identity` if it's not a function.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {Function} Returns cast function.
- */
- function castFunction(value) {
- return typeof value == 'function' ? value : identity;
- }
- /**
- * Casts `value` to a path array if it's not one.
- *
- * @private
- * @param {*} value The value to inspect.
- * @param {Object} [object] The object to query keys on.
- * @returns {Array} Returns the cast property path array.
- */
- function castPath(value, object) {
- if (isArray(value)) {
- return value;
- }
- return isKey(value, object) ? [value] : stringToPath(toString(value));
- }
- /**
- * A `baseRest` alias which can be replaced with `identity` by module
- * replacement plugins.
- *
- * @private
- * @type {Function}
- * @param {Function} func The function to apply a rest parameter to.
- * @returns {Function} Returns the new function.
- */
- var castRest = baseRest;
- /**
- * Casts `array` to a slice if it's needed.
- *
- * @private
- * @param {Array} array The array to inspect.
- * @param {number} start The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the cast slice.
- */
- function castSlice(array, start, end) {
- var length = array.length;
- end = end === undefined ? length : end;
- return (!start && end >= length) ? array : baseSlice(array, start, end);
- }
- /**
- * A simple wrapper around the global [`clearTimeout`](https://mdn.io/clearTimeout).
- *
- * @private
- * @param {number|Object} id The timer id or timeout object of the timer to clear.
- */
- var clearTimeout = ctxClearTimeout || function(id) {
- return root.clearTimeout(id);
- };
- /**
- * Creates a clone of `buffer`.
- *
- * @private
- * @param {Buffer} buffer The buffer to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Buffer} Returns the cloned buffer.
- */
- function cloneBuffer(buffer, isDeep) {
- if (isDeep) {
- return buffer.slice();
- }
- var length = buffer.length,
- result = allocUnsafe ? allocUnsafe(length) : new buffer.constructor(length);
- buffer.copy(result);
- return result;
- }
- /**
- * Creates a clone of `arrayBuffer`.
- *
- * @private
- * @param {ArrayBuffer} arrayBuffer The array buffer to clone.
- * @returns {ArrayBuffer} Returns the cloned array buffer.
- */
- function cloneArrayBuffer(arrayBuffer) {
- var result = new arrayBuffer.constructor(arrayBuffer.byteLength);
- new Uint8Array(result).set(new Uint8Array(arrayBuffer));
- return result;
- }
- /**
- * Creates a clone of `dataView`.
- *
- * @private
- * @param {Object} dataView The data view to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned data view.
- */
- function cloneDataView(dataView, isDeep) {
- var buffer = isDeep ? cloneArrayBuffer(dataView.buffer) : dataView.buffer;
- return new dataView.constructor(buffer, dataView.byteOffset, dataView.byteLength);
- }
- /**
- * Creates a clone of `regexp`.
- *
- * @private
- * @param {Object} regexp The regexp to clone.
- * @returns {Object} Returns the cloned regexp.
- */
- function cloneRegExp(regexp) {
- var result = new regexp.constructor(regexp.source, reFlags.exec(regexp));
- result.lastIndex = regexp.lastIndex;
- return result;
- }
- /**
- * Creates a clone of the `symbol` object.
- *
- * @private
- * @param {Object} symbol The symbol object to clone.
- * @returns {Object} Returns the cloned symbol object.
- */
- function cloneSymbol(symbol) {
- return symbolValueOf ? Object(symbolValueOf.call(symbol)) : {};
- }
- /**
- * Creates a clone of `typedArray`.
- *
- * @private
- * @param {Object} typedArray The typed array to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the cloned typed array.
- */
- function cloneTypedArray(typedArray, isDeep) {
- var buffer = isDeep ? cloneArrayBuffer(typedArray.buffer) : typedArray.buffer;
- return new typedArray.constructor(buffer, typedArray.byteOffset, typedArray.length);
- }
- /**
- * Compares values to sort them in ascending order.
- *
- * @private
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {number} Returns the sort order indicator for `value`.
- */
- function compareAscending(value, other) {
- if (value !== other) {
- var valIsDefined = value !== undefined,
- valIsNull = value === null,
- valIsReflexive = value === value,
- valIsSymbol = isSymbol(value);
- var othIsDefined = other !== undefined,
- othIsNull = other === null,
- othIsReflexive = other === other,
- othIsSymbol = isSymbol(other);
- if ((!othIsNull && !othIsSymbol && !valIsSymbol && value > other) ||
- (valIsSymbol && othIsDefined && othIsReflexive && !othIsNull && !othIsSymbol) ||
- (valIsNull && othIsDefined && othIsReflexive) ||
- (!valIsDefined && othIsReflexive) ||
- !valIsReflexive) {
- return 1;
- }
- if ((!valIsNull && !valIsSymbol && !othIsSymbol && value < other) ||
- (othIsSymbol && valIsDefined && valIsReflexive && !valIsNull && !valIsSymbol) ||
- (othIsNull && valIsDefined && valIsReflexive) ||
- (!othIsDefined && valIsReflexive) ||
- !othIsReflexive) {
- return -1;
- }
- }
- return 0;
- }
- /**
- * Used by `_.orderBy` to compare multiple properties of a value to another
- * and stable sort them.
- *
- * If `orders` is unspecified, all values are sorted in ascending order. Otherwise,
- * specify an order of "desc" for descending or "asc" for ascending sort order
- * of corresponding values.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {boolean[]|string[]} orders The order to sort by for each property.
- * @returns {number} Returns the sort order indicator for `object`.
- */
- function compareMultiple(object, other, orders) {
- var index = -1,
- objCriteria = object.criteria,
- othCriteria = other.criteria,
- length = objCriteria.length,
- ordersLength = orders.length;
- while (++index < length) {
- var result = compareAscending(objCriteria[index], othCriteria[index]);
- if (result) {
- if (index >= ordersLength) {
- return result;
- }
- var order = orders[index];
- return result * (order == 'desc' ? -1 : 1);
- }
- }
- // Fixes an `Array#sort` bug in the JS engine embedded in Adobe applications
- // that causes it, under certain circumstances, to provide the same value for
- // `object` and `other`. See https://github.com/jashkenas/underscore/pull/1247
- // for more details.
- //
- // This also ensures a stable sort in V8 and other engines.
- // See https://bugs.chromium.org/p/v8/issues/detail?id=90 for more details.
- return object.index - other.index;
- }
- /**
- * Creates an array that is the composition of partially applied arguments,
- * placeholders, and provided arguments into a single array of arguments.
- *
- * @private
- * @param {Array} args The provided arguments.
- * @param {Array} partials The arguments to prepend to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgs(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersLength = holders.length,
- leftIndex = -1,
- leftLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(leftLength + rangeLength),
- isUncurried = !isCurried;
- while (++leftIndex < leftLength) {
- result[leftIndex] = partials[leftIndex];
- }
- while (++argsIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[holders[argsIndex]] = args[argsIndex];
- }
- }
- while (rangeLength--) {
- result[leftIndex++] = args[argsIndex++];
- }
- return result;
- }
- /**
- * This function is like `composeArgs` except that the arguments composition
- * is tailored for `_.partialRight`.
- *
- * @private
- * @param {Array} args The provided arguments.
- * @param {Array} partials The arguments to append to those provided.
- * @param {Array} holders The `partials` placeholder indexes.
- * @params {boolean} [isCurried] Specify composing for a curried function.
- * @returns {Array} Returns the new array of composed arguments.
- */
- function composeArgsRight(args, partials, holders, isCurried) {
- var argsIndex = -1,
- argsLength = args.length,
- holdersIndex = -1,
- holdersLength = holders.length,
- rightIndex = -1,
- rightLength = partials.length,
- rangeLength = nativeMax(argsLength - holdersLength, 0),
- result = Array(rangeLength + rightLength),
- isUncurried = !isCurried;
- while (++argsIndex < rangeLength) {
- result[argsIndex] = args[argsIndex];
- }
- var offset = argsIndex;
- while (++rightIndex < rightLength) {
- result[offset + rightIndex] = partials[rightIndex];
- }
- while (++holdersIndex < holdersLength) {
- if (isUncurried || argsIndex < argsLength) {
- result[offset + holders[holdersIndex]] = args[argsIndex++];
- }
- }
- return result;
- }
- /**
- * Copies the values of `source` to `array`.
- *
- * @private
- * @param {Array} source The array to copy values from.
- * @param {Array} [array=[]] The array to copy values to.
- * @returns {Array} Returns `array`.
- */
- function copyArray(source, array) {
- var index = -1,
- length = source.length;
- array || (array = Array(length));
- while (++index < length) {
- array[index] = source[index];
- }
- return array;
- }
- /**
- * Copies properties of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy properties from.
- * @param {Array} props The property identifiers to copy.
- * @param {Object} [object={}] The object to copy properties to.
- * @param {Function} [customizer] The function to customize copied values.
- * @returns {Object} Returns `object`.
- */
- function copyObject(source, props, object, customizer) {
- var isNew = !object;
- object || (object = {});
- var index = -1,
- length = props.length;
- while (++index < length) {
- var key = props[index];
- var newValue = customizer
- ? customizer(object[key], source[key], key, object, source)
- : undefined;
- if (newValue === undefined) {
- newValue = source[key];
- }
- if (isNew) {
- baseAssignValue(object, key, newValue);
- } else {
- assignValue(object, key, newValue);
- }
- }
- return object;
- }
- /**
- * Copies own symbols of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy symbols from.
- * @param {Object} [object={}] The object to copy symbols to.
- * @returns {Object} Returns `object`.
- */
- function copySymbols(source, object) {
- return copyObject(source, getSymbols(source), object);
- }
- /**
- * Copies own and inherited symbols of `source` to `object`.
- *
- * @private
- * @param {Object} source The object to copy symbols from.
- * @param {Object} [object={}] The object to copy symbols to.
- * @returns {Object} Returns `object`.
- */
- function copySymbolsIn(source, object) {
- return copyObject(source, getSymbolsIn(source), object);
- }
- /**
- * Creates a function like `_.groupBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} [initializer] The accumulator object initializer.
- * @returns {Function} Returns the new aggregator function.
- */
- function createAggregator(setter, initializer) {
- return function(collection, iteratee) {
- var func = isArray(collection) ? arrayAggregator : baseAggregator,
- accumulator = initializer ? initializer() : {};
- return func(collection, setter, getIteratee(iteratee, 2), accumulator);
- };
- }
- /**
- * Creates a function like `_.assign`.
- *
- * @private
- * @param {Function} assigner The function to assign values.
- * @returns {Function} Returns the new assigner function.
- */
- function createAssigner(assigner) {
- return baseRest(function(object, sources) {
- var index = -1,
- length = sources.length,
- customizer = length > 1 ? sources[length - 1] : undefined,
- guard = length > 2 ? sources[2] : undefined;
- customizer = (assigner.length > 3 && typeof customizer == 'function')
- ? (length--, customizer)
- : undefined;
- if (guard && isIterateeCall(sources[0], sources[1], guard)) {
- customizer = length < 3 ? undefined : customizer;
- length = 1;
- }
- object = Object(object);
- while (++index < length) {
- var source = sources[index];
- if (source) {
- assigner(object, source, index, customizer);
- }
- }
- return object;
- });
- }
- /**
- * Creates a `baseEach` or `baseEachRight` function.
- *
- * @private
- * @param {Function} eachFunc The function to iterate over a collection.
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseEach(eachFunc, fromRight) {
- return function(collection, iteratee) {
- if (collection == null) {
- return collection;
- }
- if (!isArrayLike(collection)) {
- return eachFunc(collection, iteratee);
- }
- var length = collection.length,
- index = fromRight ? length : -1,
- iterable = Object(collection);
- while ((fromRight ? index-- : ++index < length)) {
- if (iteratee(iterable[index], index, iterable) === false) {
- break;
- }
- }
- return collection;
- };
- }
- /**
- * Creates a base function for methods like `_.forIn` and `_.forOwn`.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new base function.
- */
- function createBaseFor(fromRight) {
- return function(object, iteratee, keysFunc) {
- var index = -1,
- iterable = Object(object),
- props = keysFunc(object),
- length = props.length;
- while (length--) {
- var key = props[fromRight ? length : ++index];
- if (iteratee(iterable[key], key, iterable) === false) {
- break;
- }
- }
- return object;
- };
- }
- /**
- * Creates a function that wraps `func` to invoke it with the optional `this`
- * binding of `thisArg`.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createBind(func, bitmask, thisArg) {
- var isBind = bitmask & WRAP_BIND_FLAG,
- Ctor = createCtor(func);
- function wrapper() {
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return fn.apply(isBind ? thisArg : this, arguments);
- }
- return wrapper;
- }
- /**
- * Creates a function like `_.lowerFirst`.
- *
- * @private
- * @param {string} methodName The name of the `String` case method to use.
- * @returns {Function} Returns the new case function.
- */
- function createCaseFirst(methodName) {
- return function(string) {
- string = toString(string);
- var strSymbols = hasUnicode(string)
- ? stringToArray(string)
- : undefined;
- var chr = strSymbols
- ? strSymbols[0]
- : string.charAt(0);
- var trailing = strSymbols
- ? castSlice(strSymbols, 1).join('')
- : string.slice(1);
- return chr[methodName]() + trailing;
- };
- }
- /**
- * Creates a function like `_.camelCase`.
- *
- * @private
- * @param {Function} callback The function to combine each word.
- * @returns {Function} Returns the new compounder function.
- */
- function createCompounder(callback) {
- return function(string) {
- return arrayReduce(words(deburr(string).replace(reApos, '')), callback, '');
- };
- }
- /**
- * Creates a function that produces an instance of `Ctor` regardless of
- * whether it was invoked as part of a `new` expression or by `call` or `apply`.
- *
- * @private
- * @param {Function} Ctor The constructor to wrap.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCtor(Ctor) {
- return function() {
- // Use a `switch` statement to work with class constructors. See
- // http://ecma-international.org/ecma-262/7.0/#sec-ecmascript-function-objects-call-thisargument-argumentslist
- // for more details.
- var args = arguments;
- switch (args.length) {
- case 0: return new Ctor;
- case 1: return new Ctor(args[0]);
- case 2: return new Ctor(args[0], args[1]);
- case 3: return new Ctor(args[0], args[1], args[2]);
- case 4: return new Ctor(args[0], args[1], args[2], args[3]);
- case 5: return new Ctor(args[0], args[1], args[2], args[3], args[4]);
- case 6: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5]);
- case 7: return new Ctor(args[0], args[1], args[2], args[3], args[4], args[5], args[6]);
- }
- var thisBinding = baseCreate(Ctor.prototype),
- result = Ctor.apply(thisBinding, args);
- // Mimic the constructor's `return` behavior.
- // See https://es5.github.io/#x13.2.2 for more details.
- return isObject(result) ? result : thisBinding;
- };
- }
- /**
- * Creates a function that wraps `func` to enable currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {number} arity The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createCurry(func, bitmask, arity) {
- var Ctor = createCtor(func);
- function wrapper() {
- var length = arguments.length,
- args = Array(length),
- index = length,
- placeholder = getHolder(wrapper);
- while (index--) {
- args[index] = arguments[index];
- }
- var holders = (length < 3 && args[0] !== placeholder && args[length - 1] !== placeholder)
- ? []
- : replaceHolders(args, placeholder);
- length -= holders.length;
- if (length < arity) {
- return createRecurry(
- func, bitmask, createHybrid, wrapper.placeholder, undefined,
- args, holders, undefined, undefined, arity - length);
- }
- var fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- return apply(fn, this, args);
- }
- return wrapper;
- }
- /**
- * Creates a `_.find` or `_.findLast` function.
- *
- * @private
- * @param {Function} findIndexFunc The function to find the collection index.
- * @returns {Function} Returns the new find function.
- */
- function createFind(findIndexFunc) {
- return function(collection, predicate, fromIndex) {
- var iterable = Object(collection);
- if (!isArrayLike(collection)) {
- var iteratee = getIteratee(predicate, 3);
- collection = keys(collection);
- predicate = function(key) { return iteratee(iterable[key], key, iterable); };
- }
- var index = findIndexFunc(collection, predicate, fromIndex);
- return index > -1 ? iterable[iteratee ? collection[index] : index] : undefined;
- };
- }
- /**
- * Creates a `_.flow` or `_.flowRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new flow function.
- */
- function createFlow(fromRight) {
- return flatRest(function(funcs) {
- var length = funcs.length,
- index = length,
- prereq = LodashWrapper.prototype.thru;
- if (fromRight) {
- funcs.reverse();
- }
- while (index--) {
- var func = funcs[index];
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (prereq && !wrapper && getFuncName(func) == 'wrapper') {
- var wrapper = new LodashWrapper([], true);
- }
- }
- index = wrapper ? index : length;
- while (++index < length) {
- func = funcs[index];
- var funcName = getFuncName(func),
- data = funcName == 'wrapper' ? getData(func) : undefined;
- if (data && isLaziable(data[0]) &&
- data[1] == (WRAP_ARY_FLAG | WRAP_CURRY_FLAG | WRAP_PARTIAL_FLAG | WRAP_REARG_FLAG) &&
- !data[4].length && data[9] == 1
- ) {
- wrapper = wrapper[getFuncName(data[0])].apply(wrapper, data[3]);
- } else {
- wrapper = (func.length == 1 && isLaziable(func))
- ? wrapper[funcName]()
- : wrapper.thru(func);
- }
- }
- return function() {
- var args = arguments,
- value = args[0];
- if (wrapper && args.length == 1 && isArray(value)) {
- return wrapper.plant(value).value();
- }
- var index = 0,
- result = length ? funcs[index].apply(this, args) : value;
- while (++index < length) {
- result = funcs[index].call(this, result);
- }
- return result;
- };
- });
- }
- /**
- * Creates a function that wraps `func` to invoke it with optional `this`
- * binding of `thisArg`, partial application, and currying.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to
- * the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [partialsRight] The arguments to append to those provided
- * to the new function.
- * @param {Array} [holdersRight] The `partialsRight` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createHybrid(func, bitmask, thisArg, partials, holders, partialsRight, holdersRight, argPos, ary, arity) {
- var isAry = bitmask & WRAP_ARY_FLAG,
- isBind = bitmask & WRAP_BIND_FLAG,
- isBindKey = bitmask & WRAP_BIND_KEY_FLAG,
- isCurried = bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG),
- isFlip = bitmask & WRAP_FLIP_FLAG,
- Ctor = isBindKey ? undefined : createCtor(func);
- function wrapper() {
- var length = arguments.length,
- args = Array(length),
- index = length;
- while (index--) {
- args[index] = arguments[index];
- }
- if (isCurried) {
- var placeholder = getHolder(wrapper),
- holdersCount = countHolders(args, placeholder);
- }
- if (partials) {
- args = composeArgs(args, partials, holders, isCurried);
- }
- if (partialsRight) {
- args = composeArgsRight(args, partialsRight, holdersRight, isCurried);
- }
- length -= holdersCount;
- if (isCurried && length < arity) {
- var newHolders = replaceHolders(args, placeholder);
- return createRecurry(
- func, bitmask, createHybrid, wrapper.placeholder, thisArg,
- args, newHolders, argPos, ary, arity - length
- );
- }
- var thisBinding = isBind ? thisArg : this,
- fn = isBindKey ? thisBinding[func] : func;
- length = args.length;
- if (argPos) {
- args = reorder(args, argPos);
- } else if (isFlip && length > 1) {
- args.reverse();
- }
- if (isAry && ary < length) {
- args.length = ary;
- }
- if (this && this !== root && this instanceof wrapper) {
- fn = Ctor || createCtor(fn);
- }
- return fn.apply(thisBinding, args);
- }
- return wrapper;
- }
- /**
- * Creates a function like `_.invertBy`.
- *
- * @private
- * @param {Function} setter The function to set accumulator values.
- * @param {Function} toIteratee The function to resolve iteratees.
- * @returns {Function} Returns the new inverter function.
- */
- function createInverter(setter, toIteratee) {
- return function(object, iteratee) {
- return baseInverter(object, setter, toIteratee(iteratee), {});
- };
- }
- /**
- * Creates a function that performs a mathematical operation on two values.
- *
- * @private
- * @param {Function} operator The function to perform the operation.
- * @param {number} [defaultValue] The value used for `undefined` arguments.
- * @returns {Function} Returns the new mathematical operation function.
- */
- function createMathOperation(operator, defaultValue) {
- return function(value, other) {
- var result;
- if (value === undefined && other === undefined) {
- return defaultValue;
- }
- if (value !== undefined) {
- result = value;
- }
- if (other !== undefined) {
- if (result === undefined) {
- return other;
- }
- if (typeof value == 'string' || typeof other == 'string') {
- value = baseToString(value);
- other = baseToString(other);
- } else {
- value = baseToNumber(value);
- other = baseToNumber(other);
- }
- result = operator(value, other);
- }
- return result;
- };
- }
- /**
- * Creates a function like `_.over`.
- *
- * @private
- * @param {Function} arrayFunc The function to iterate over iteratees.
- * @returns {Function} Returns the new over function.
- */
- function createOver(arrayFunc) {
- return flatRest(function(iteratees) {
- iteratees = arrayMap(iteratees, baseUnary(getIteratee()));
- return baseRest(function(args) {
- var thisArg = this;
- return arrayFunc(iteratees, function(iteratee) {
- return apply(iteratee, thisArg, args);
- });
- });
- });
- }
- /**
- * Creates the padding for `string` based on `length`. The `chars` string
- * is truncated if the number of characters exceeds `length`.
- *
- * @private
- * @param {number} length The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padding for `string`.
- */
- function createPadding(length, chars) {
- chars = chars === undefined ? ' ' : baseToString(chars);
- var charsLength = chars.length;
- if (charsLength < 2) {
- return charsLength ? baseRepeat(chars, length) : chars;
- }
- var result = baseRepeat(chars, nativeCeil(length / stringSize(chars)));
- return hasUnicode(chars)
- ? castSlice(stringToArray(result), 0, length).join('')
- : result.slice(0, length);
- }
- /**
- * Creates a function that wraps `func` to invoke it with the `this` binding
- * of `thisArg` and `partials` prepended to the arguments it receives.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {Array} partials The arguments to prepend to those provided to
- * the new function.
- * @returns {Function} Returns the new wrapped function.
- */
- function createPartial(func, bitmask, thisArg, partials) {
- var isBind = bitmask & WRAP_BIND_FLAG,
- Ctor = createCtor(func);
- function wrapper() {
- var argsIndex = -1,
- argsLength = arguments.length,
- leftIndex = -1,
- leftLength = partials.length,
- args = Array(leftLength + argsLength),
- fn = (this && this !== root && this instanceof wrapper) ? Ctor : func;
- while (++leftIndex < leftLength) {
- args[leftIndex] = partials[leftIndex];
- }
- while (argsLength--) {
- args[leftIndex++] = arguments[++argsIndex];
- }
- return apply(fn, isBind ? thisArg : this, args);
- }
- return wrapper;
- }
- /**
- * Creates a `_.range` or `_.rangeRight` function.
- *
- * @private
- * @param {boolean} [fromRight] Specify iterating from right to left.
- * @returns {Function} Returns the new range function.
- */
- function createRange(fromRight) {
- return function(start, end, step) {
- if (step && typeof step != 'number' && isIterateeCall(start, end, step)) {
- end = step = undefined;
- }
- // Ensure the sign of `-0` is preserved.
- start = toFinite(start);
- if (end === undefined) {
- end = start;
- start = 0;
- } else {
- end = toFinite(end);
- }
- step = step === undefined ? (start < end ? 1 : -1) : toFinite(step);
- return baseRange(start, end, step, fromRight);
- };
- }
- /**
- * Creates a function that performs a relational operation on two values.
- *
- * @private
- * @param {Function} operator The function to perform the operation.
- * @returns {Function} Returns the new relational operation function.
- */
- function createRelationalOperation(operator) {
- return function(value, other) {
- if (!(typeof value == 'string' && typeof other == 'string')) {
- value = toNumber(value);
- other = toNumber(other);
- }
- return operator(value, other);
- };
- }
- /**
- * Creates a function that wraps `func` to continue currying.
- *
- * @private
- * @param {Function} func The function to wrap.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @param {Function} wrapFunc The function to create the `func` wrapper.
- * @param {*} placeholder The placeholder value.
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to prepend to those provided to
- * the new function.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createRecurry(func, bitmask, wrapFunc, placeholder, thisArg, partials, holders, argPos, ary, arity) {
- var isCurry = bitmask & WRAP_CURRY_FLAG,
- newHolders = isCurry ? holders : undefined,
- newHoldersRight = isCurry ? undefined : holders,
- newPartials = isCurry ? partials : undefined,
- newPartialsRight = isCurry ? undefined : partials;
- bitmask |= (isCurry ? WRAP_PARTIAL_FLAG : WRAP_PARTIAL_RIGHT_FLAG);
- bitmask &= ~(isCurry ? WRAP_PARTIAL_RIGHT_FLAG : WRAP_PARTIAL_FLAG);
- if (!(bitmask & WRAP_CURRY_BOUND_FLAG)) {
- bitmask &= ~(WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG);
- }
- var newData = [
- func, bitmask, thisArg, newPartials, newHolders, newPartialsRight,
- newHoldersRight, argPos, ary, arity
- ];
- var result = wrapFunc.apply(undefined, newData);
- if (isLaziable(func)) {
- setData(result, newData);
- }
- result.placeholder = placeholder;
- return setWrapToString(result, func, bitmask);
- }
- /**
- * Creates a function like `_.round`.
- *
- * @private
- * @param {string} methodName The name of the `Math` method to use when rounding.
- * @returns {Function} Returns the new round function.
- */
- function createRound(methodName) {
- var func = Math[methodName];
- return function(number, precision) {
- number = toNumber(number);
- precision = precision == null ? 0 : nativeMin(toInteger(precision), 292);
- if (precision && nativeIsFinite(number)) {
- // Shift with exponential notation to avoid floating-point issues.
- // See [MDN](https://mdn.io/round#Examples) for more details.
- var pair = (toString(number) + 'e').split('e'),
- value = func(pair[0] + 'e' + (+pair[1] + precision));
- pair = (toString(value) + 'e').split('e');
- return +(pair[0] + 'e' + (+pair[1] - precision));
- }
- return func(number);
- };
- }
- /**
- * Creates a set object of `values`.
- *
- * @private
- * @param {Array} values The values to add to the set.
- * @returns {Object} Returns the new set.
- */
- var createSet = !(Set && (1 / setToArray(new Set([,-0]))[1]) == INFINITY) ? noop : function(values) {
- return new Set(values);
- };
- /**
- * Creates a `_.toPairs` or `_.toPairsIn` function.
- *
- * @private
- * @param {Function} keysFunc The function to get the keys of a given object.
- * @returns {Function} Returns the new pairs function.
- */
- function createToPairs(keysFunc) {
- return function(object) {
- var tag = getTag(object);
- if (tag == mapTag) {
- return mapToArray(object);
- }
- if (tag == setTag) {
- return setToPairs(object);
- }
- return baseToPairs(object, keysFunc(object));
- };
- }
- /**
- * Creates a function that either curries or invokes `func` with optional
- * `this` binding and partially applied arguments.
- *
- * @private
- * @param {Function|string} func The function or method name to wrap.
- * @param {number} bitmask The bitmask flags.
- * 1 - `_.bind`
- * 2 - `_.bindKey`
- * 4 - `_.curry` or `_.curryRight` of a bound function
- * 8 - `_.curry`
- * 16 - `_.curryRight`
- * 32 - `_.partial`
- * 64 - `_.partialRight`
- * 128 - `_.rearg`
- * 256 - `_.ary`
- * 512 - `_.flip`
- * @param {*} [thisArg] The `this` binding of `func`.
- * @param {Array} [partials] The arguments to be partially applied.
- * @param {Array} [holders] The `partials` placeholder indexes.
- * @param {Array} [argPos] The argument positions of the new function.
- * @param {number} [ary] The arity cap of `func`.
- * @param {number} [arity] The arity of `func`.
- * @returns {Function} Returns the new wrapped function.
- */
- function createWrap(func, bitmask, thisArg, partials, holders, argPos, ary, arity) {
- var isBindKey = bitmask & WRAP_BIND_KEY_FLAG;
- if (!isBindKey && typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var length = partials ? partials.length : 0;
- if (!length) {
- bitmask &= ~(WRAP_PARTIAL_FLAG | WRAP_PARTIAL_RIGHT_FLAG);
- partials = holders = undefined;
- }
- ary = ary === undefined ? ary : nativeMax(toInteger(ary), 0);
- arity = arity === undefined ? arity : toInteger(arity);
- length -= holders ? holders.length : 0;
- if (bitmask & WRAP_PARTIAL_RIGHT_FLAG) {
- var partialsRight = partials,
- holdersRight = holders;
- partials = holders = undefined;
- }
- var data = isBindKey ? undefined : getData(func);
- var newData = [
- func, bitmask, thisArg, partials, holders, partialsRight, holdersRight,
- argPos, ary, arity
- ];
- if (data) {
- mergeData(newData, data);
- }
- func = newData[0];
- bitmask = newData[1];
- thisArg = newData[2];
- partials = newData[3];
- holders = newData[4];
- arity = newData[9] = newData[9] === undefined
- ? (isBindKey ? 0 : func.length)
- : nativeMax(newData[9] - length, 0);
- if (!arity && bitmask & (WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG)) {
- bitmask &= ~(WRAP_CURRY_FLAG | WRAP_CURRY_RIGHT_FLAG);
- }
- if (!bitmask || bitmask == WRAP_BIND_FLAG) {
- var result = createBind(func, bitmask, thisArg);
- } else if (bitmask == WRAP_CURRY_FLAG || bitmask == WRAP_CURRY_RIGHT_FLAG) {
- result = createCurry(func, bitmask, arity);
- } else if ((bitmask == WRAP_PARTIAL_FLAG || bitmask == (WRAP_BIND_FLAG | WRAP_PARTIAL_FLAG)) && !holders.length) {
- result = createPartial(func, bitmask, thisArg, partials);
- } else {
- result = createHybrid.apply(undefined, newData);
- }
- var setter = data ? baseSetData : setData;
- return setWrapToString(setter(result, newData), func, bitmask);
- }
- /**
- * Used by `_.defaults` to customize its `_.assignIn` use to assign properties
- * of source objects to the destination object for all destination properties
- * that resolve to `undefined`.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to assign.
- * @param {Object} object The parent object of `objValue`.
- * @returns {*} Returns the value to assign.
- */
- function customDefaultsAssignIn(objValue, srcValue, key, object) {
- if (objValue === undefined ||
- (eq(objValue, objectProto[key]) && !hasOwnProperty.call(object, key))) {
- return srcValue;
- }
- return objValue;
- }
- /**
- * Used by `_.defaultsDeep` to customize its `_.merge` use to merge source
- * objects into destination objects that are passed thru.
- *
- * @private
- * @param {*} objValue The destination value.
- * @param {*} srcValue The source value.
- * @param {string} key The key of the property to merge.
- * @param {Object} object The parent object of `objValue`.
- * @param {Object} source The parent object of `srcValue`.
- * @param {Object} [stack] Tracks traversed source values and their merged
- * counterparts.
- * @returns {*} Returns the value to assign.
- */
- function customDefaultsMerge(objValue, srcValue, key, object, source, stack) {
- if (isObject(objValue) && isObject(srcValue)) {
- // Recursively merge objects and arrays (susceptible to call stack limits).
- stack.set(srcValue, objValue);
- baseMerge(objValue, srcValue, undefined, customDefaultsMerge, stack);
- stack['delete'](srcValue);
- }
- return objValue;
- }
- /**
- * Used by `_.omit` to customize its `_.cloneDeep` use to only clone plain
- * objects.
- *
- * @private
- * @param {*} value The value to inspect.
- * @param {string} key The key of the property to inspect.
- * @returns {*} Returns the uncloned value or `undefined` to defer cloning to `_.cloneDeep`.
- */
- function customOmitClone(value) {
- return isPlainObject(value) ? undefined : value;
- }
- /**
- * A specialized version of `baseIsEqualDeep` for arrays with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Array} array The array to compare.
- * @param {Array} other The other array to compare.
- * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
- * @param {Function} customizer The function to customize comparisons.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Object} stack Tracks traversed `array` and `other` objects.
- * @returns {boolean} Returns `true` if the arrays are equivalent, else `false`.
- */
- function equalArrays(array, other, bitmask, customizer, equalFunc, stack) {
- var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
- arrLength = array.length,
- othLength = other.length;
- if (arrLength != othLength && !(isPartial && othLength > arrLength)) {
- return false;
- }
- // Check that cyclic values are equal.
- var arrStacked = stack.get(array);
- var othStacked = stack.get(other);
- if (arrStacked && othStacked) {
- return arrStacked == other && othStacked == array;
- }
- var index = -1,
- result = true,
- seen = (bitmask & COMPARE_UNORDERED_FLAG) ? new SetCache : undefined;
- stack.set(array, other);
- stack.set(other, array);
- // Ignore non-index properties.
- while (++index < arrLength) {
- var arrValue = array[index],
- othValue = other[index];
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, arrValue, index, other, array, stack)
- : customizer(arrValue, othValue, index, array, other, stack);
- }
- if (compared !== undefined) {
- if (compared) {
- continue;
- }
- result = false;
- break;
- }
- // Recursively compare arrays (susceptible to call stack limits).
- if (seen) {
- if (!arraySome(other, function(othValue, othIndex) {
- if (!cacheHas(seen, othIndex) &&
- (arrValue === othValue || equalFunc(arrValue, othValue, bitmask, customizer, stack))) {
- return seen.push(othIndex);
- }
- })) {
- result = false;
- break;
- }
- } else if (!(
- arrValue === othValue ||
- equalFunc(arrValue, othValue, bitmask, customizer, stack)
- )) {
- result = false;
- break;
- }
- }
- stack['delete'](array);
- stack['delete'](other);
- return result;
- }
- /**
- * A specialized version of `baseIsEqualDeep` for comparing objects of
- * the same `toStringTag`.
- *
- * **Note:** This function only supports comparing values with tags of
- * `Boolean`, `Date`, `Error`, `Number`, `RegExp`, or `String`.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {string} tag The `toStringTag` of the objects to compare.
- * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
- * @param {Function} customizer The function to customize comparisons.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalByTag(object, other, tag, bitmask, customizer, equalFunc, stack) {
- switch (tag) {
- case dataViewTag:
- if ((object.byteLength != other.byteLength) ||
- (object.byteOffset != other.byteOffset)) {
- return false;
- }
- object = object.buffer;
- other = other.buffer;
- case arrayBufferTag:
- if ((object.byteLength != other.byteLength) ||
- !equalFunc(new Uint8Array(object), new Uint8Array(other))) {
- return false;
- }
- return true;
- case boolTag:
- case dateTag:
- case numberTag:
- // Coerce booleans to `1` or `0` and dates to milliseconds.
- // Invalid dates are coerced to `NaN`.
- return eq(+object, +other);
- case errorTag:
- return object.name == other.name && object.message == other.message;
- case regexpTag:
- case stringTag:
- // Coerce regexes to strings and treat strings, primitives and objects,
- // as equal. See http://www.ecma-international.org/ecma-262/7.0/#sec-regexp.prototype.tostring
- // for more details.
- return object == (other + '');
- case mapTag:
- var convert = mapToArray;
- case setTag:
- var isPartial = bitmask & COMPARE_PARTIAL_FLAG;
- convert || (convert = setToArray);
- if (object.size != other.size && !isPartial) {
- return false;
- }
- // Assume cyclic values are equal.
- var stacked = stack.get(object);
- if (stacked) {
- return stacked == other;
- }
- bitmask |= COMPARE_UNORDERED_FLAG;
- // Recursively compare objects (susceptible to call stack limits).
- stack.set(object, other);
- var result = equalArrays(convert(object), convert(other), bitmask, customizer, equalFunc, stack);
- stack['delete'](object);
- return result;
- case symbolTag:
- if (symbolValueOf) {
- return symbolValueOf.call(object) == symbolValueOf.call(other);
- }
- }
- return false;
- }
- /**
- * A specialized version of `baseIsEqualDeep` for objects with support for
- * partial deep comparisons.
- *
- * @private
- * @param {Object} object The object to compare.
- * @param {Object} other The other object to compare.
- * @param {number} bitmask The bitmask flags. See `baseIsEqual` for more details.
- * @param {Function} customizer The function to customize comparisons.
- * @param {Function} equalFunc The function to determine equivalents of values.
- * @param {Object} stack Tracks traversed `object` and `other` objects.
- * @returns {boolean} Returns `true` if the objects are equivalent, else `false`.
- */
- function equalObjects(object, other, bitmask, customizer, equalFunc, stack) {
- var isPartial = bitmask & COMPARE_PARTIAL_FLAG,
- objProps = getAllKeys(object),
- objLength = objProps.length,
- othProps = getAllKeys(other),
- othLength = othProps.length;
- if (objLength != othLength && !isPartial) {
- return false;
- }
- var index = objLength;
- while (index--) {
- var key = objProps[index];
- if (!(isPartial ? key in other : hasOwnProperty.call(other, key))) {
- return false;
- }
- }
- // Check that cyclic values are equal.
- var objStacked = stack.get(object);
- var othStacked = stack.get(other);
- if (objStacked && othStacked) {
- return objStacked == other && othStacked == object;
- }
- var result = true;
- stack.set(object, other);
- stack.set(other, object);
- var skipCtor = isPartial;
- while (++index < objLength) {
- key = objProps[index];
- var objValue = object[key],
- othValue = other[key];
- if (customizer) {
- var compared = isPartial
- ? customizer(othValue, objValue, key, other, object, stack)
- : customizer(objValue, othValue, key, object, other, stack);
- }
- // Recursively compare objects (susceptible to call stack limits).
- if (!(compared === undefined
- ? (objValue === othValue || equalFunc(objValue, othValue, bitmask, customizer, stack))
- : compared
- )) {
- result = false;
- break;
- }
- skipCtor || (skipCtor = key == 'constructor');
- }
- if (result && !skipCtor) {
- var objCtor = object.constructor,
- othCtor = other.constructor;
- // Non `Object` object instances with different constructors are not equal.
- if (objCtor != othCtor &&
- ('constructor' in object && 'constructor' in other) &&
- !(typeof objCtor == 'function' && objCtor instanceof objCtor &&
- typeof othCtor == 'function' && othCtor instanceof othCtor)) {
- result = false;
- }
- }
- stack['delete'](object);
- stack['delete'](other);
- return result;
- }
- /**
- * A specialized version of `baseRest` which flattens the rest array.
- *
- * @private
- * @param {Function} func The function to apply a rest parameter to.
- * @returns {Function} Returns the new function.
- */
- function flatRest(func) {
- return setToString(overRest(func, undefined, flatten), func + '');
- }
- /**
- * Creates an array of own enumerable property names and symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function getAllKeys(object) {
- return baseGetAllKeys(object, keys, getSymbols);
- }
- /**
- * Creates an array of own and inherited enumerable property names and
- * symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names and symbols.
- */
- function getAllKeysIn(object) {
- return baseGetAllKeys(object, keysIn, getSymbolsIn);
- }
- /**
- * Gets metadata for `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {*} Returns the metadata for `func`.
- */
- var getData = !metaMap ? noop : function(func) {
- return metaMap.get(func);
- };
- /**
- * Gets the name of `func`.
- *
- * @private
- * @param {Function} func The function to query.
- * @returns {string} Returns the function name.
- */
- function getFuncName(func) {
- var result = (func.name + ''),
- array = realNames[result],
- length = hasOwnProperty.call(realNames, result) ? array.length : 0;
- while (length--) {
- var data = array[length],
- otherFunc = data.func;
- if (otherFunc == null || otherFunc == func) {
- return data.name;
- }
- }
- return result;
- }
- /**
- * Gets the argument placeholder value for `func`.
- *
- * @private
- * @param {Function} func The function to inspect.
- * @returns {*} Returns the placeholder value.
- */
- function getHolder(func) {
- var object = hasOwnProperty.call(lodash, 'placeholder') ? lodash : func;
- return object.placeholder;
- }
- /**
- * Gets the appropriate "iteratee" function. If `_.iteratee` is customized,
- * this function returns the custom method, otherwise it returns `baseIteratee`.
- * If arguments are provided, the chosen function is invoked with them and
- * its result is returned.
- *
- * @private
- * @param {*} [value] The value to convert to an iteratee.
- * @param {number} [arity] The arity of the created iteratee.
- * @returns {Function} Returns the chosen function or its result.
- */
- function getIteratee() {
- var result = lodash.iteratee || iteratee;
- result = result === iteratee ? baseIteratee : result;
- return arguments.length ? result(arguments[0], arguments[1]) : result;
- }
- /**
- * Gets the data for `map`.
- *
- * @private
- * @param {Object} map The map to query.
- * @param {string} key The reference key.
- * @returns {*} Returns the map data.
- */
- function getMapData(map, key) {
- var data = map.__data__;
- return isKeyable(key)
- ? data[typeof key == 'string' ? 'string' : 'hash']
- : data.map;
- }
- /**
- * Gets the property names, values, and compare flags of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the match data of `object`.
- */
- function getMatchData(object) {
- var result = keys(object),
- length = result.length;
- while (length--) {
- var key = result[length],
- value = object[key];
- result[length] = [key, value, isStrictComparable(value)];
- }
- return result;
- }
- /**
- * Gets the native function at `key` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the method to get.
- * @returns {*} Returns the function if it's native, else `undefined`.
- */
- function getNative(object, key) {
- var value = getValue(object, key);
- return baseIsNative(value) ? value : undefined;
- }
- /**
- * A specialized version of `baseGetTag` which ignores `Symbol.toStringTag` values.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the raw `toStringTag`.
- */
- function getRawTag(value) {
- var isOwn = hasOwnProperty.call(value, symToStringTag),
- tag = value[symToStringTag];
- try {
- value[symToStringTag] = undefined;
- var unmasked = true;
- } catch (e) {}
- var result = nativeObjectToString.call(value);
- if (unmasked) {
- if (isOwn) {
- value[symToStringTag] = tag;
- } else {
- delete value[symToStringTag];
- }
- }
- return result;
- }
- /**
- * Creates an array of the own enumerable symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
- var getSymbols = !nativeGetSymbols ? stubArray : function(object) {
- if (object == null) {
- return [];
- }
- object = Object(object);
- return arrayFilter(nativeGetSymbols(object), function(symbol) {
- return propertyIsEnumerable.call(object, symbol);
- });
- };
- /**
- * Creates an array of the own and inherited enumerable symbols of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of symbols.
- */
- var getSymbolsIn = !nativeGetSymbols ? stubArray : function(object) {
- var result = [];
- while (object) {
- arrayPush(result, getSymbols(object));
- object = getPrototype(object);
- }
- return result;
- };
- /**
- * Gets the `toStringTag` of `value`.
- *
- * @private
- * @param {*} value The value to query.
- * @returns {string} Returns the `toStringTag`.
- */
- var getTag = baseGetTag;
- // Fallback for data views, maps, sets, and weak maps in IE 11 and promises in Node.js < 6.
- if ((DataView && getTag(new DataView(new ArrayBuffer(1))) != dataViewTag) ||
- (Map && getTag(new Map) != mapTag) ||
- (Promise && getTag(Promise.resolve()) != promiseTag) ||
- (Set && getTag(new Set) != setTag) ||
- (WeakMap && getTag(new WeakMap) != weakMapTag)) {
- getTag = function(value) {
- var result = baseGetTag(value),
- Ctor = result == objectTag ? value.constructor : undefined,
- ctorString = Ctor ? toSource(Ctor) : '';
- if (ctorString) {
- switch (ctorString) {
- case dataViewCtorString: return dataViewTag;
- case mapCtorString: return mapTag;
- case promiseCtorString: return promiseTag;
- case setCtorString: return setTag;
- case weakMapCtorString: return weakMapTag;
- }
- }
- return result;
- };
- }
- /**
- * Gets the view, applying any `transforms` to the `start` and `end` positions.
- *
- * @private
- * @param {number} start The start of the view.
- * @param {number} end The end of the view.
- * @param {Array} transforms The transformations to apply to the view.
- * @returns {Object} Returns an object containing the `start` and `end`
- * positions of the view.
- */
- function getView(start, end, transforms) {
- var index = -1,
- length = transforms.length;
- while (++index < length) {
- var data = transforms[index],
- size = data.size;
- switch (data.type) {
- case 'drop': start += size; break;
- case 'dropRight': end -= size; break;
- case 'take': end = nativeMin(end, start + size); break;
- case 'takeRight': start = nativeMax(start, end - size); break;
- }
- }
- return { 'start': start, 'end': end };
- }
- /**
- * Extracts wrapper details from the `source` body comment.
- *
- * @private
- * @param {string} source The source to inspect.
- * @returns {Array} Returns the wrapper details.
- */
- function getWrapDetails(source) {
- var match = source.match(reWrapDetails);
- return match ? match[1].split(reSplitDetails) : [];
- }
- /**
- * Checks if `path` exists on `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @param {Function} hasFunc The function to check properties.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
- */
- function hasPath(object, path, hasFunc) {
- path = castPath(path, object);
- var index = -1,
- length = path.length,
- result = false;
- while (++index < length) {
- var key = toKey(path[index]);
- if (!(result = object != null && hasFunc(object, key))) {
- break;
- }
- object = object[key];
- }
- if (result || ++index != length) {
- return result;
- }
- length = object == null ? 0 : object.length;
- return !!length && isLength(length) && isIndex(key, length) &&
- (isArray(object) || isArguments(object));
- }
- /**
- * Initializes an array clone.
- *
- * @private
- * @param {Array} array The array to clone.
- * @returns {Array} Returns the initialized clone.
- */
- function initCloneArray(array) {
- var length = array.length,
- result = new array.constructor(length);
- // Add properties assigned by `RegExp#exec`.
- if (length && typeof array[0] == 'string' && hasOwnProperty.call(array, 'index')) {
- result.index = array.index;
- result.input = array.input;
- }
- return result;
- }
- /**
- * Initializes an object clone.
- *
- * @private
- * @param {Object} object The object to clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneObject(object) {
- return (typeof object.constructor == 'function' && !isPrototype(object))
- ? baseCreate(getPrototype(object))
- : {};
- }
- /**
- * Initializes an object clone based on its `toStringTag`.
- *
- * **Note:** This function only supports cloning values with tags of
- * `Boolean`, `Date`, `Error`, `Map`, `Number`, `RegExp`, `Set`, or `String`.
- *
- * @private
- * @param {Object} object The object to clone.
- * @param {string} tag The `toStringTag` of the object to clone.
- * @param {boolean} [isDeep] Specify a deep clone.
- * @returns {Object} Returns the initialized clone.
- */
- function initCloneByTag(object, tag, isDeep) {
- var Ctor = object.constructor;
- switch (tag) {
- case arrayBufferTag:
- return cloneArrayBuffer(object);
- case boolTag:
- case dateTag:
- return new Ctor(+object);
- case dataViewTag:
- return cloneDataView(object, isDeep);
- case float32Tag: case float64Tag:
- case int8Tag: case int16Tag: case int32Tag:
- case uint8Tag: case uint8ClampedTag: case uint16Tag: case uint32Tag:
- return cloneTypedArray(object, isDeep);
- case mapTag:
- return new Ctor;
- case numberTag:
- case stringTag:
- return new Ctor(object);
- case regexpTag:
- return cloneRegExp(object);
- case setTag:
- return new Ctor;
- case symbolTag:
- return cloneSymbol(object);
- }
- }
- /**
- * Inserts wrapper `details` in a comment at the top of the `source` body.
- *
- * @private
- * @param {string} source The source to modify.
- * @returns {Array} details The details to insert.
- * @returns {string} Returns the modified source.
- */
- function insertWrapDetails(source, details) {
- var length = details.length;
- if (!length) {
- return source;
- }
- var lastIndex = length - 1;
- details[lastIndex] = (length > 1 ? '& ' : '') + details[lastIndex];
- details = details.join(length > 2 ? ', ' : ' ');
- return source.replace(reWrapComment, '{\n/* [wrapped with ' + details + '] */\n');
- }
- /**
- * Checks if `value` is a flattenable `arguments` object or array.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is flattenable, else `false`.
- */
- function isFlattenable(value) {
- return isArray(value) || isArguments(value) ||
- !!(spreadableSymbol && value && value[spreadableSymbol]);
- }
- /**
- * Checks if `value` is a valid array-like index.
- *
- * @private
- * @param {*} value The value to check.
- * @param {number} [length=MAX_SAFE_INTEGER] The upper bounds of a valid index.
- * @returns {boolean} Returns `true` if `value` is a valid index, else `false`.
- */
- function isIndex(value, length) {
- var type = typeof value;
- length = length == null ? MAX_SAFE_INTEGER : length;
- return !!length &&
- (type == 'number' ||
- (type != 'symbol' && reIsUint.test(value))) &&
- (value > -1 && value % 1 == 0 && value < length);
- }
- /**
- * Checks if the given arguments are from an iteratee call.
- *
- * @private
- * @param {*} value The potential iteratee value argument.
- * @param {*} index The potential iteratee index or key argument.
- * @param {*} object The potential iteratee object argument.
- * @returns {boolean} Returns `true` if the arguments are from an iteratee call,
- * else `false`.
- */
- function isIterateeCall(value, index, object) {
- if (!isObject(object)) {
- return false;
- }
- var type = typeof index;
- if (type == 'number'
- ? (isArrayLike(object) && isIndex(index, object.length))
- : (type == 'string' && index in object)
- ) {
- return eq(object[index], value);
- }
- return false;
- }
- /**
- * Checks if `value` is a property name and not a property path.
- *
- * @private
- * @param {*} value The value to check.
- * @param {Object} [object] The object to query keys on.
- * @returns {boolean} Returns `true` if `value` is a property name, else `false`.
- */
- function isKey(value, object) {
- if (isArray(value)) {
- return false;
- }
- var type = typeof value;
- if (type == 'number' || type == 'symbol' || type == 'boolean' ||
- value == null || isSymbol(value)) {
- return true;
- }
- return reIsPlainProp.test(value) || !reIsDeepProp.test(value) ||
- (object != null && value in Object(object));
- }
- /**
- * Checks if `value` is suitable for use as unique object key.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is suitable, else `false`.
- */
- function isKeyable(value) {
- var type = typeof value;
- return (type == 'string' || type == 'number' || type == 'symbol' || type == 'boolean')
- ? (value !== '__proto__')
- : (value === null);
- }
- /**
- * Checks if `func` has a lazy counterpart.
- *
- * @private
- * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` has a lazy counterpart,
- * else `false`.
- */
- function isLaziable(func) {
- var funcName = getFuncName(func),
- other = lodash[funcName];
- if (typeof other != 'function' || !(funcName in LazyWrapper.prototype)) {
- return false;
- }
- if (func === other) {
- return true;
- }
- var data = getData(other);
- return !!data && func === data[0];
- }
- /**
- * Checks if `func` has its source masked.
- *
- * @private
- * @param {Function} func The function to check.
- * @returns {boolean} Returns `true` if `func` is masked, else `false`.
- */
- function isMasked(func) {
- return !!maskSrcKey && (maskSrcKey in func);
- }
- /**
- * Checks if `func` is capable of being masked.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `func` is maskable, else `false`.
- */
- var isMaskable = coreJsData ? isFunction : stubFalse;
- /**
- * Checks if `value` is likely a prototype object.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a prototype, else `false`.
- */
- function isPrototype(value) {
- var Ctor = value && value.constructor,
- proto = (typeof Ctor == 'function' && Ctor.prototype) || objectProto;
- return value === proto;
- }
- /**
- * Checks if `value` is suitable for strict equality comparisons, i.e. `===`.
- *
- * @private
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` if suitable for strict
- * equality comparisons, else `false`.
- */
- function isStrictComparable(value) {
- return value === value && !isObject(value);
- }
- /**
- * A specialized version of `matchesProperty` for source values suitable
- * for strict equality comparisons, i.e. `===`.
- *
- * @private
- * @param {string} key The key of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new spec function.
- */
- function matchesStrictComparable(key, srcValue) {
- return function(object) {
- if (object == null) {
- return false;
- }
- return object[key] === srcValue &&
- (srcValue !== undefined || (key in Object(object)));
- };
- }
- /**
- * A specialized version of `_.memoize` which clears the memoized function's
- * cache when it exceeds `MAX_MEMOIZE_SIZE`.
- *
- * @private
- * @param {Function} func The function to have its output memoized.
- * @returns {Function} Returns the new memoized function.
- */
- function memoizeCapped(func) {
- var result = memoize(func, function(key) {
- if (cache.size === MAX_MEMOIZE_SIZE) {
- cache.clear();
- }
- return key;
- });
- var cache = result.cache;
- return result;
- }
- /**
- * Merges the function metadata of `source` into `data`.
- *
- * Merging metadata reduces the number of wrappers used to invoke a function.
- * This is possible because methods like `_.bind`, `_.curry`, and `_.partial`
- * may be applied regardless of execution order. Methods like `_.ary` and
- * `_.rearg` modify function arguments, making the order in which they are
- * executed important, preventing the merging of metadata. However, we make
- * an exception for a safe combined case where curried functions have `_.ary`
- * and or `_.rearg` applied.
- *
- * @private
- * @param {Array} data The destination metadata.
- * @param {Array} source The source metadata.
- * @returns {Array} Returns `data`.
- */
- function mergeData(data, source) {
- var bitmask = data[1],
- srcBitmask = source[1],
- newBitmask = bitmask | srcBitmask,
- isCommon = newBitmask < (WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG | WRAP_ARY_FLAG);
- var isCombo =
- ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_CURRY_FLAG)) ||
- ((srcBitmask == WRAP_ARY_FLAG) && (bitmask == WRAP_REARG_FLAG) && (data[7].length <= source[8])) ||
- ((srcBitmask == (WRAP_ARY_FLAG | WRAP_REARG_FLAG)) && (source[7].length <= source[8]) && (bitmask == WRAP_CURRY_FLAG));
- // Exit early if metadata can't be merged.
- if (!(isCommon || isCombo)) {
- return data;
- }
- // Use source `thisArg` if available.
- if (srcBitmask & WRAP_BIND_FLAG) {
- data[2] = source[2];
- // Set when currying a bound function.
- newBitmask |= bitmask & WRAP_BIND_FLAG ? 0 : WRAP_CURRY_BOUND_FLAG;
- }
- // Compose partial arguments.
- var value = source[3];
- if (value) {
- var partials = data[3];
- data[3] = partials ? composeArgs(partials, value, source[4]) : value;
- data[4] = partials ? replaceHolders(data[3], PLACEHOLDER) : source[4];
- }
- // Compose partial right arguments.
- value = source[5];
- if (value) {
- partials = data[5];
- data[5] = partials ? composeArgsRight(partials, value, source[6]) : value;
- data[6] = partials ? replaceHolders(data[5], PLACEHOLDER) : source[6];
- }
- // Use source `argPos` if available.
- value = source[7];
- if (value) {
- data[7] = value;
- }
- // Use source `ary` if it's smaller.
- if (srcBitmask & WRAP_ARY_FLAG) {
- data[8] = data[8] == null ? source[8] : nativeMin(data[8], source[8]);
- }
- // Use source `arity` if one is not provided.
- if (data[9] == null) {
- data[9] = source[9];
- }
- // Use source `func` and merge bitmasks.
- data[0] = source[0];
- data[1] = newBitmask;
- return data;
- }
- /**
- * This function is like
- * [`Object.keys`](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
- * except that it includes inherited enumerable properties.
- *
- * @private
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- */
- function nativeKeysIn(object) {
- var result = [];
- if (object != null) {
- for (var key in Object(object)) {
- result.push(key);
- }
- }
- return result;
- }
- /**
- * Converts `value` to a string using `Object.prototype.toString`.
- *
- * @private
- * @param {*} value The value to convert.
- * @returns {string} Returns the converted string.
- */
- function objectToString(value) {
- return nativeObjectToString.call(value);
- }
- /**
- * A specialized version of `baseRest` which transforms the rest array.
- *
- * @private
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @param {Function} transform The rest array transform.
- * @returns {Function} Returns the new function.
- */
- function overRest(func, start, transform) {
- start = nativeMax(start === undefined ? (func.length - 1) : start, 0);
- return function() {
- var args = arguments,
- index = -1,
- length = nativeMax(args.length - start, 0),
- array = Array(length);
- while (++index < length) {
- array[index] = args[start + index];
- }
- index = -1;
- var otherArgs = Array(start + 1);
- while (++index < start) {
- otherArgs[index] = args[index];
- }
- otherArgs[start] = transform(array);
- return apply(func, this, otherArgs);
- };
- }
- /**
- * Gets the parent value at `path` of `object`.
- *
- * @private
- * @param {Object} object The object to query.
- * @param {Array} path The path to get the parent value of.
- * @returns {*} Returns the parent value.
- */
- function parent(object, path) {
- return path.length < 2 ? object : baseGet(object, baseSlice(path, 0, -1));
- }
- /**
- * Reorder `array` according to the specified indexes where the element at
- * the first index is assigned as the first element, the element at
- * the second index is assigned as the second element, and so on.
- *
- * @private
- * @param {Array} array The array to reorder.
- * @param {Array} indexes The arranged array indexes.
- * @returns {Array} Returns `array`.
- */
- function reorder(array, indexes) {
- var arrLength = array.length,
- length = nativeMin(indexes.length, arrLength),
- oldArray = copyArray(array);
- while (length--) {
- var index = indexes[length];
- array[length] = isIndex(index, arrLength) ? oldArray[index] : undefined;
- }
- return array;
- }
- /**
- * Gets the value at `key`, unless `key` is "__proto__" or "constructor".
- *
- * @private
- * @param {Object} object The object to query.
- * @param {string} key The key of the property to get.
- * @returns {*} Returns the property value.
- */
- function safeGet(object, key) {
- if (key === 'constructor' && typeof object[key] === 'function') {
- return;
- }
- if (key == '__proto__') {
- return;
- }
- return object[key];
- }
- /**
- * Sets metadata for `func`.
- *
- * **Note:** If this function becomes hot, i.e. is invoked a lot in a short
- * period of time, it will trip its breaker and transition to an identity
- * function to avoid garbage collection pauses in V8. See
- * [V8 issue 2070](https://bugs.chromium.org/p/v8/issues/detail?id=2070)
- * for more details.
- *
- * @private
- * @param {Function} func The function to associate metadata with.
- * @param {*} data The metadata.
- * @returns {Function} Returns `func`.
- */
- var setData = shortOut(baseSetData);
- /**
- * A simple wrapper around the global [`setTimeout`](https://mdn.io/setTimeout).
- *
- * @private
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @returns {number|Object} Returns the timer id or timeout object.
- */
- var setTimeout = ctxSetTimeout || function(func, wait) {
- return root.setTimeout(func, wait);
- };
- /**
- * Sets the `toString` method of `func` to return `string`.
- *
- * @private
- * @param {Function} func The function to modify.
- * @param {Function} string The `toString` result.
- * @returns {Function} Returns `func`.
- */
- var setToString = shortOut(baseSetToString);
- /**
- * Sets the `toString` method of `wrapper` to mimic the source of `reference`
- * with wrapper details in a comment at the top of the source body.
- *
- * @private
- * @param {Function} wrapper The function to modify.
- * @param {Function} reference The reference function.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @returns {Function} Returns `wrapper`.
- */
- function setWrapToString(wrapper, reference, bitmask) {
- var source = (reference + '');
- return setToString(wrapper, insertWrapDetails(source, updateWrapDetails(getWrapDetails(source), bitmask)));
- }
- /**
- * Creates a function that'll short out and invoke `identity` instead
- * of `func` when it's called `HOT_COUNT` or more times in `HOT_SPAN`
- * milliseconds.
- *
- * @private
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new shortable function.
- */
- function shortOut(func) {
- var count = 0,
- lastCalled = 0;
- return function() {
- var stamp = nativeNow(),
- remaining = HOT_SPAN - (stamp - lastCalled);
- lastCalled = stamp;
- if (remaining > 0) {
- if (++count >= HOT_COUNT) {
- return arguments[0];
- }
- } else {
- count = 0;
- }
- return func.apply(undefined, arguments);
- };
- }
- /**
- * A specialized version of `_.shuffle` which mutates and sets the size of `array`.
- *
- * @private
- * @param {Array} array The array to shuffle.
- * @param {number} [size=array.length] The size of `array`.
- * @returns {Array} Returns `array`.
- */
- function shuffleSelf(array, size) {
- var index = -1,
- length = array.length,
- lastIndex = length - 1;
- size = size === undefined ? length : size;
- while (++index < size) {
- var rand = baseRandom(index, lastIndex),
- value = array[rand];
- array[rand] = array[index];
- array[index] = value;
- }
- array.length = size;
- return array;
- }
- /**
- * Converts `string` to a property path array.
- *
- * @private
- * @param {string} string The string to convert.
- * @returns {Array} Returns the property path array.
- */
- var stringToPath = memoizeCapped(function(string) {
- var result = [];
- if (string.charCodeAt(0) === 46 /* . */) {
- result.push('');
- }
- string.replace(rePropName, function(match, number, quote, subString) {
- result.push(quote ? subString.replace(reEscapeChar, '$1') : (number || match));
- });
- return result;
- });
- /**
- * Converts `value` to a string key if it's not a string or symbol.
- *
- * @private
- * @param {*} value The value to inspect.
- * @returns {string|symbol} Returns the key.
- */
- function toKey(value) {
- if (typeof value == 'string' || isSymbol(value)) {
- return value;
- }
- var result = (value + '');
- return (result == '0' && (1 / value) == -INFINITY) ? '-0' : result;
- }
- /**
- * Converts `func` to its source code.
- *
- * @private
- * @param {Function} func The function to convert.
- * @returns {string} Returns the source code.
- */
- function toSource(func) {
- if (func != null) {
- try {
- return funcToString.call(func);
- } catch (e) {}
- try {
- return (func + '');
- } catch (e) {}
- }
- return '';
- }
- /**
- * Updates wrapper `details` based on `bitmask` flags.
- *
- * @private
- * @returns {Array} details The details to modify.
- * @param {number} bitmask The bitmask flags. See `createWrap` for more details.
- * @returns {Array} Returns `details`.
- */
- function updateWrapDetails(details, bitmask) {
- arrayEach(wrapFlags, function(pair) {
- var value = '_.' + pair[0];
- if ((bitmask & pair[1]) && !arrayIncludes(details, value)) {
- details.push(value);
- }
- });
- return details.sort();
- }
- /**
- * Creates a clone of `wrapper`.
- *
- * @private
- * @param {Object} wrapper The wrapper to clone.
- * @returns {Object} Returns the cloned wrapper.
- */
- function wrapperClone(wrapper) {
- if (wrapper instanceof LazyWrapper) {
- return wrapper.clone();
- }
- var result = new LodashWrapper(wrapper.__wrapped__, wrapper.__chain__);
- result.__actions__ = copyArray(wrapper.__actions__);
- result.__index__ = wrapper.__index__;
- result.__values__ = wrapper.__values__;
- return result;
- }
- /*------------------------------------------------------------------------*/
- /**
- * Creates an array of elements split into groups the length of `size`.
- * If `array` can't be split evenly, the final chunk will be the remaining
- * elements.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to process.
- * @param {number} [size=1] The length of each chunk
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the new array of chunks.
- * @example
- *
- * _.chunk(['a', 'b', 'c', 'd'], 2);
- * // => [['a', 'b'], ['c', 'd']]
- *
- * _.chunk(['a', 'b', 'c', 'd'], 3);
- * // => [['a', 'b', 'c'], ['d']]
- */
- function chunk(array, size, guard) {
- if ((guard ? isIterateeCall(array, size, guard) : size === undefined)) {
- size = 1;
- } else {
- size = nativeMax(toInteger(size), 0);
- }
- var length = array == null ? 0 : array.length;
- if (!length || size < 1) {
- return [];
- }
- var index = 0,
- resIndex = 0,
- result = Array(nativeCeil(length / size));
- while (index < length) {
- result[resIndex++] = baseSlice(array, index, (index += size));
- }
- return result;
- }
- /**
- * Creates an array with all falsey values removed. The values `false`, `null`,
- * `0`, `""`, `undefined`, and `NaN` are falsey.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to compact.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.compact([0, 1, false, 2, '', 3]);
- * // => [1, 2, 3]
- */
- function compact(array) {
- var index = -1,
- length = array == null ? 0 : array.length,
- resIndex = 0,
- result = [];
- while (++index < length) {
- var value = array[index];
- if (value) {
- result[resIndex++] = value;
- }
- }
- return result;
- }
- /**
- * Creates a new array concatenating `array` with any additional arrays
- * and/or values.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to concatenate.
- * @param {...*} [values] The values to concatenate.
- * @returns {Array} Returns the new concatenated array.
- * @example
- *
- * var array = [1];
- * var other = _.concat(array, 2, [3], [[4]]);
- *
- * console.log(other);
- * // => [1, 2, 3, [4]]
- *
- * console.log(array);
- * // => [1]
- */
- function concat() {
- var length = arguments.length;
- if (!length) {
- return [];
- }
- var args = Array(length - 1),
- array = arguments[0],
- index = length;
- while (index--) {
- args[index - 1] = arguments[index];
- }
- return arrayPush(isArray(array) ? copyArray(array) : [array], baseFlatten(args, 1));
- }
- /**
- * Creates an array of `array` values not included in the other given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. The order and references of result values are
- * determined by the first array.
- *
- * **Note:** Unlike `_.pullAll`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.without, _.xor
- * @example
- *
- * _.difference([2, 1], [2, 3]);
- * // => [1]
- */
- var difference = baseRest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true))
- : [];
- });
- /**
- * This method is like `_.difference` except that it accepts `iteratee` which
- * is invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. The order and references of result values are
- * determined by the first array. The iteratee is invoked with one argument:
- * (value).
- *
- * **Note:** Unlike `_.pullAllBy`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.differenceBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.differenceBy([{ 'x': 2 }, { 'x': 1 }], [{ 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var differenceBy = baseRest(function(array, values) {
- var iteratee = last(values);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), getIteratee(iteratee, 2))
- : [];
- });
- /**
- * This method is like `_.difference` except that it accepts `comparator`
- * which is invoked to compare elements of `array` to `values`. The order and
- * references of result values are determined by the first array. The comparator
- * is invoked with two arguments: (arrVal, othVal).
- *
- * **Note:** Unlike `_.pullAllWith`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...Array} [values] The values to exclude.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- *
- * _.differenceWith(objects, [{ 'x': 1, 'y': 2 }], _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }]
- */
- var differenceWith = baseRest(function(array, values) {
- var comparator = last(values);
- if (isArrayLikeObject(comparator)) {
- comparator = undefined;
- }
- return isArrayLikeObject(array)
- ? baseDifference(array, baseFlatten(values, 1, isArrayLikeObject, true), undefined, comparator)
- : [];
- });
- /**
- * Creates a slice of `array` with `n` elements dropped from the beginning.
- *
- * @static
- * @memberOf _
- * @since 0.5.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.drop([1, 2, 3]);
- * // => [2, 3]
- *
- * _.drop([1, 2, 3], 2);
- * // => [3]
- *
- * _.drop([1, 2, 3], 5);
- * // => []
- *
- * _.drop([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function drop(array, n, guard) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
- /**
- * Creates a slice of `array` with `n` elements dropped from the end.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to drop.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.dropRight([1, 2, 3]);
- * // => [1, 2]
- *
- * _.dropRight([1, 2, 3], 2);
- * // => [1]
- *
- * _.dropRight([1, 2, 3], 5);
- * // => []
- *
- * _.dropRight([1, 2, 3], 0);
- * // => [1, 2, 3]
- */
- function dropRight(array, n, guard) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
- /**
- * Creates a slice of `array` excluding elements dropped from the end.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.dropRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropRightWhile(users, ['active', false]);
- * // => objects for ['barney']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropRightWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true, true)
- : [];
- }
- /**
- * Creates a slice of `array` excluding elements dropped from the beginning.
- * Elements are dropped until `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.dropWhile(users, function(o) { return !o.active; });
- * // => objects for ['pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.dropWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.dropWhile(users, ['active', false]);
- * // => objects for ['pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.dropWhile(users, 'active');
- * // => objects for ['barney', 'fred', 'pebbles']
- */
- function dropWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), true)
- : [];
- }
- /**
- * Fills elements of `array` with `value` from `start` up to, but not
- * including, `end`.
- *
- * **Note:** This method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 3.2.0
- * @category Array
- * @param {Array} array The array to fill.
- * @param {*} value The value to fill `array` with.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.fill(array, 'a');
- * console.log(array);
- * // => ['a', 'a', 'a']
- *
- * _.fill(Array(3), 2);
- * // => [2, 2, 2]
- *
- * _.fill([4, 6, 8, 10], '*', 1, 3);
- * // => [4, '*', '*', 10]
- */
- function fill(array, value, start, end) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- if (start && typeof start != 'number' && isIterateeCall(array, value, start)) {
- start = 0;
- end = length;
- }
- return baseFill(array, value, start, end);
- }
- /**
- * This method is like `_.find` except that it returns the index of the first
- * element `predicate` returns truthy for instead of the element itself.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.findIndex(users, function(o) { return o.user == 'barney'; });
- * // => 0
- *
- * // The `_.matches` iteratee shorthand.
- * _.findIndex(users, { 'user': 'fred', 'active': false });
- * // => 1
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findIndex(users, ['active', false]);
- * // => 0
- *
- * // The `_.property` iteratee shorthand.
- * _.findIndex(users, 'active');
- * // => 2
- */
- function findIndex(array, predicate, fromIndex) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return -1;
- }
- var index = fromIndex == null ? 0 : toInteger(fromIndex);
- if (index < 0) {
- index = nativeMax(length + index, 0);
- }
- return baseFindIndex(array, getIteratee(predicate, 3), index);
- }
- /**
- * This method is like `_.findIndex` except that it iterates over elements
- * of `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param {number} [fromIndex=array.length-1] The index to search from.
- * @returns {number} Returns the index of the found element, else `-1`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.findLastIndex(users, function(o) { return o.user == 'pebbles'; });
- * // => 2
- *
- * // The `_.matches` iteratee shorthand.
- * _.findLastIndex(users, { 'user': 'barney', 'active': true });
- * // => 0
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findLastIndex(users, ['active', false]);
- * // => 2
- *
- * // The `_.property` iteratee shorthand.
- * _.findLastIndex(users, 'active');
- * // => 0
- */
- function findLastIndex(array, predicate, fromIndex) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return -1;
- }
- var index = length - 1;
- if (fromIndex !== undefined) {
- index = toInteger(fromIndex);
- index = fromIndex < 0
- ? nativeMax(length + index, 0)
- : nativeMin(index, length - 1);
- }
- return baseFindIndex(array, getIteratee(predicate, 3), index, true);
- }
- /**
- * Flattens `array` a single level deep.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flatten([1, [2, [3, [4]], 5]]);
- * // => [1, 2, [3, [4]], 5]
- */
- function flatten(array) {
- var length = array == null ? 0 : array.length;
- return length ? baseFlatten(array, 1) : [];
- }
- /**
- * Recursively flattens `array`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * _.flattenDeep([1, [2, [3, [4]], 5]]);
- * // => [1, 2, 3, 4, 5]
- */
- function flattenDeep(array) {
- var length = array == null ? 0 : array.length;
- return length ? baseFlatten(array, INFINITY) : [];
- }
- /**
- * Recursively flatten `array` up to `depth` times.
- *
- * @static
- * @memberOf _
- * @since 4.4.0
- * @category Array
- * @param {Array} array The array to flatten.
- * @param {number} [depth=1] The maximum recursion depth.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * var array = [1, [2, [3, [4]], 5]];
- *
- * _.flattenDepth(array, 1);
- * // => [1, 2, [3, [4]], 5]
- *
- * _.flattenDepth(array, 2);
- * // => [1, 2, 3, [4], 5]
- */
- function flattenDepth(array, depth) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- depth = depth === undefined ? 1 : toInteger(depth);
- return baseFlatten(array, depth);
- }
- /**
- * The inverse of `_.toPairs`; this method returns an object composed
- * from key-value `pairs`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} pairs The key-value pairs.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.fromPairs([['a', 1], ['b', 2]]);
- * // => { 'a': 1, 'b': 2 }
- */
- function fromPairs(pairs) {
- var index = -1,
- length = pairs == null ? 0 : pairs.length,
- result = {};
- while (++index < length) {
- var pair = pairs[index];
- result[pair[0]] = pair[1];
- }
- return result;
- }
- /**
- * Gets the first element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @alias first
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the first element of `array`.
- * @example
- *
- * _.head([1, 2, 3]);
- * // => 1
- *
- * _.head([]);
- * // => undefined
- */
- function head(array) {
- return (array && array.length) ? array[0] : undefined;
- }
- /**
- * Gets the index at which the first occurrence of `value` is found in `array`
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. If `fromIndex` is negative, it's used as the
- * offset from the end of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.indexOf([1, 2, 1, 2], 2);
- * // => 1
- *
- * // Search from the `fromIndex`.
- * _.indexOf([1, 2, 1, 2], 2, 2);
- * // => 3
- */
- function indexOf(array, value, fromIndex) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return -1;
- }
- var index = fromIndex == null ? 0 : toInteger(fromIndex);
- if (index < 0) {
- index = nativeMax(length + index, 0);
- }
- return baseIndexOf(array, value, index);
- }
- /**
- * Gets all but the last element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.initial([1, 2, 3]);
- * // => [1, 2]
- */
- function initial(array) {
- var length = array == null ? 0 : array.length;
- return length ? baseSlice(array, 0, -1) : [];
- }
- /**
- * Creates an array of unique values that are included in all given arrays
- * using [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons. The order and references of result values are
- * determined by the first array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersection([2, 1], [2, 3]);
- * // => [2]
- */
- var intersection = baseRest(function(arrays) {
- var mapped = arrayMap(arrays, castArrayLikeObject);
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped)
- : [];
- });
- /**
- * This method is like `_.intersection` except that it accepts `iteratee`
- * which is invoked for each element of each `arrays` to generate the criterion
- * by which they're compared. The order and references of result values are
- * determined by the first array. The iteratee is invoked with one argument:
- * (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * _.intersectionBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [2.1]
- *
- * // The `_.property` iteratee shorthand.
- * _.intersectionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }]
- */
- var intersectionBy = baseRest(function(arrays) {
- var iteratee = last(arrays),
- mapped = arrayMap(arrays, castArrayLikeObject);
- if (iteratee === last(mapped)) {
- iteratee = undefined;
- } else {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, getIteratee(iteratee, 2))
- : [];
- });
- /**
- * This method is like `_.intersection` except that it accepts `comparator`
- * which is invoked to compare elements of `arrays`. The order and references
- * of result values are determined by the first array. The comparator is
- * invoked with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of intersecting values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.intersectionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }]
- */
- var intersectionWith = baseRest(function(arrays) {
- var comparator = last(arrays),
- mapped = arrayMap(arrays, castArrayLikeObject);
- comparator = typeof comparator == 'function' ? comparator : undefined;
- if (comparator) {
- mapped.pop();
- }
- return (mapped.length && mapped[0] === arrays[0])
- ? baseIntersection(mapped, undefined, comparator)
- : [];
- });
- /**
- * Converts all elements in `array` into a string separated by `separator`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to convert.
- * @param {string} [separator=','] The element separator.
- * @returns {string} Returns the joined string.
- * @example
- *
- * _.join(['a', 'b', 'c'], '~');
- * // => 'a~b~c'
- */
- function join(array, separator) {
- return array == null ? '' : nativeJoin.call(array, separator);
- }
- /**
- * Gets the last element of `array`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {*} Returns the last element of `array`.
- * @example
- *
- * _.last([1, 2, 3]);
- * // => 3
- */
- function last(array) {
- var length = array == null ? 0 : array.length;
- return length ? array[length - 1] : undefined;
- }
- /**
- * This method is like `_.indexOf` except that it iterates over elements of
- * `array` from right to left.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=array.length-1] The index to search from.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.lastIndexOf([1, 2, 1, 2], 2);
- * // => 3
- *
- * // Search from the `fromIndex`.
- * _.lastIndexOf([1, 2, 1, 2], 2, 2);
- * // => 1
- */
- function lastIndexOf(array, value, fromIndex) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return -1;
- }
- var index = length;
- if (fromIndex !== undefined) {
- index = toInteger(fromIndex);
- index = index < 0 ? nativeMax(length + index, 0) : nativeMin(index, length - 1);
- }
- return value === value
- ? strictLastIndexOf(array, value, index)
- : baseFindIndex(array, baseIsNaN, index, true);
- }
- /**
- * Gets the element at index `n` of `array`. If `n` is negative, the nth
- * element from the end is returned.
- *
- * @static
- * @memberOf _
- * @since 4.11.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=0] The index of the element to return.
- * @returns {*} Returns the nth element of `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'd'];
- *
- * _.nth(array, 1);
- * // => 'b'
- *
- * _.nth(array, -2);
- * // => 'c';
- */
- function nth(array, n) {
- return (array && array.length) ? baseNth(array, toInteger(n)) : undefined;
- }
- /**
- * Removes all given values from `array` using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * **Note:** Unlike `_.without`, this method mutates `array`. Use `_.remove`
- * to remove elements from an array by predicate.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...*} [values] The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
- *
- * _.pull(array, 'a', 'c');
- * console.log(array);
- * // => ['b', 'b']
- */
- var pull = baseRest(pullAll);
- /**
- * This method is like `_.pull` except that it accepts an array of values to remove.
- *
- * **Note:** Unlike `_.difference`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = ['a', 'b', 'c', 'a', 'b', 'c'];
- *
- * _.pullAll(array, ['a', 'c']);
- * console.log(array);
- * // => ['b', 'b']
- */
- function pullAll(array, values) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values)
- : array;
- }
- /**
- * This method is like `_.pullAll` except that it accepts `iteratee` which is
- * invoked for each element of `array` and `values` to generate the criterion
- * by which they're compared. The iteratee is invoked with one argument: (value).
- *
- * **Note:** Unlike `_.differenceBy`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1 }, { 'x': 2 }, { 'x': 3 }, { 'x': 1 }];
- *
- * _.pullAllBy(array, [{ 'x': 1 }, { 'x': 3 }], 'x');
- * console.log(array);
- * // => [{ 'x': 2 }]
- */
- function pullAllBy(array, values, iteratee) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, getIteratee(iteratee, 2))
- : array;
- }
- /**
- * This method is like `_.pullAll` except that it accepts `comparator` which
- * is invoked to compare elements of `array` to `values`. The comparator is
- * invoked with two arguments: (arrVal, othVal).
- *
- * **Note:** Unlike `_.differenceWith`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 4.6.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Array} values The values to remove.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [{ 'x': 1, 'y': 2 }, { 'x': 3, 'y': 4 }, { 'x': 5, 'y': 6 }];
- *
- * _.pullAllWith(array, [{ 'x': 3, 'y': 4 }], _.isEqual);
- * console.log(array);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 5, 'y': 6 }]
- */
- function pullAllWith(array, values, comparator) {
- return (array && array.length && values && values.length)
- ? basePullAll(array, values, undefined, comparator)
- : array;
- }
- /**
- * Removes elements from `array` corresponding to `indexes` and returns an
- * array of removed elements.
- *
- * **Note:** Unlike `_.at`, this method mutates `array`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {...(number|number[])} [indexes] The indexes of elements to remove.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = ['a', 'b', 'c', 'd'];
- * var pulled = _.pullAt(array, [1, 3]);
- *
- * console.log(array);
- * // => ['a', 'c']
- *
- * console.log(pulled);
- * // => ['b', 'd']
- */
- var pullAt = flatRest(function(array, indexes) {
- var length = array == null ? 0 : array.length,
- result = baseAt(array, indexes);
- basePullAt(array, arrayMap(indexes, function(index) {
- return isIndex(index, length) ? +index : index;
- }).sort(compareAscending));
- return result;
- });
- /**
- * Removes all elements from `array` that `predicate` returns truthy for
- * and returns an array of the removed elements. The predicate is invoked
- * with three arguments: (value, index, array).
- *
- * **Note:** Unlike `_.filter`, this method mutates `array`. Use `_.pull`
- * to pull elements from an array by value.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new array of removed elements.
- * @example
- *
- * var array = [1, 2, 3, 4];
- * var evens = _.remove(array, function(n) {
- * return n % 2 == 0;
- * });
- *
- * console.log(array);
- * // => [1, 3]
- *
- * console.log(evens);
- * // => [2, 4]
- */
- function remove(array, predicate) {
- var result = [];
- if (!(array && array.length)) {
- return result;
- }
- var index = -1,
- indexes = [],
- length = array.length;
- predicate = getIteratee(predicate, 3);
- while (++index < length) {
- var value = array[index];
- if (predicate(value, index, array)) {
- result.push(value);
- indexes.push(index);
- }
- }
- basePullAt(array, indexes);
- return result;
- }
- /**
- * Reverses `array` so that the first element becomes the last, the second
- * element becomes the second to last, and so on.
- *
- * **Note:** This method mutates `array` and is based on
- * [`Array#reverse`](https://mdn.io/Array/reverse).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to modify.
- * @returns {Array} Returns `array`.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _.reverse(array);
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function reverse(array) {
- return array == null ? array : nativeReverse.call(array);
- }
- /**
- * Creates a slice of `array` from `start` up to, but not including, `end`.
- *
- * **Note:** This method is used instead of
- * [`Array#slice`](https://mdn.io/Array/slice) to ensure dense arrays are
- * returned.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to slice.
- * @param {number} [start=0] The start position.
- * @param {number} [end=array.length] The end position.
- * @returns {Array} Returns the slice of `array`.
- */
- function slice(array, start, end) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- if (end && typeof end != 'number' && isIterateeCall(array, start, end)) {
- start = 0;
- end = length;
- }
- else {
- start = start == null ? 0 : toInteger(start);
- end = end === undefined ? length : toInteger(end);
- }
- return baseSlice(array, start, end);
- }
- /**
- * Uses a binary search to determine the lowest index at which `value`
- * should be inserted into `array` in order to maintain its sort order.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * _.sortedIndex([30, 50], 40);
- * // => 1
- */
- function sortedIndex(array, value) {
- return baseSortedIndex(array, value);
- }
- /**
- * This method is like `_.sortedIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * var objects = [{ 'x': 4 }, { 'x': 5 }];
- *
- * _.sortedIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
- * // => 0
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedIndexBy(objects, { 'x': 4 }, 'x');
- * // => 0
- */
- function sortedIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee, 2));
- }
- /**
- * This method is like `_.indexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedIndexOf([4, 5, 5, 5, 6], 5);
- * // => 1
- */
- function sortedIndexOf(array, value) {
- var length = array == null ? 0 : array.length;
- if (length) {
- var index = baseSortedIndex(array, value);
- if (index < length && eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
- /**
- * This method is like `_.sortedIndex` except that it returns the highest
- * index at which `value` should be inserted into `array` in order to
- * maintain its sort order.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * _.sortedLastIndex([4, 5, 5, 5, 6], 5);
- * // => 4
- */
- function sortedLastIndex(array, value) {
- return baseSortedIndex(array, value, true);
- }
- /**
- * This method is like `_.sortedLastIndex` except that it accepts `iteratee`
- * which is invoked for `value` and each element of `array` to compute their
- * sort ranking. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The sorted array to inspect.
- * @param {*} value The value to evaluate.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the index at which `value` should be inserted
- * into `array`.
- * @example
- *
- * var objects = [{ 'x': 4 }, { 'x': 5 }];
- *
- * _.sortedLastIndexBy(objects, { 'x': 4 }, function(o) { return o.x; });
- * // => 1
- *
- * // The `_.property` iteratee shorthand.
- * _.sortedLastIndexBy(objects, { 'x': 4 }, 'x');
- * // => 1
- */
- function sortedLastIndexBy(array, value, iteratee) {
- return baseSortedIndexBy(array, value, getIteratee(iteratee, 2), true);
- }
- /**
- * This method is like `_.lastIndexOf` except that it performs a binary
- * search on a sorted `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {*} value The value to search for.
- * @returns {number} Returns the index of the matched value, else `-1`.
- * @example
- *
- * _.sortedLastIndexOf([4, 5, 5, 5, 6], 5);
- * // => 3
- */
- function sortedLastIndexOf(array, value) {
- var length = array == null ? 0 : array.length;
- if (length) {
- var index = baseSortedIndex(array, value, true) - 1;
- if (eq(array[index], value)) {
- return index;
- }
- }
- return -1;
- }
- /**
- * This method is like `_.uniq` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniq([1, 1, 2]);
- * // => [1, 2]
- */
- function sortedUniq(array) {
- return (array && array.length)
- ? baseSortedUniq(array)
- : [];
- }
- /**
- * This method is like `_.uniqBy` except that it's designed and optimized
- * for sorted arrays.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.sortedUniqBy([1.1, 1.2, 2.3, 2.4], Math.floor);
- * // => [1.1, 2.3]
- */
- function sortedUniqBy(array, iteratee) {
- return (array && array.length)
- ? baseSortedUniq(array, getIteratee(iteratee, 2))
- : [];
- }
- /**
- * Gets all but the first element of `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.tail([1, 2, 3]);
- * // => [2, 3]
- */
- function tail(array) {
- var length = array == null ? 0 : array.length;
- return length ? baseSlice(array, 1, length) : [];
- }
- /**
- * Creates a slice of `array` with `n` elements taken from the beginning.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.take([1, 2, 3]);
- * // => [1]
- *
- * _.take([1, 2, 3], 2);
- * // => [1, 2]
- *
- * _.take([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.take([1, 2, 3], 0);
- * // => []
- */
- function take(array, n, guard) {
- if (!(array && array.length)) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- return baseSlice(array, 0, n < 0 ? 0 : n);
- }
- /**
- * Creates a slice of `array` with `n` elements taken from the end.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {number} [n=1] The number of elements to take.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * _.takeRight([1, 2, 3]);
- * // => [3]
- *
- * _.takeRight([1, 2, 3], 2);
- * // => [2, 3]
- *
- * _.takeRight([1, 2, 3], 5);
- * // => [1, 2, 3]
- *
- * _.takeRight([1, 2, 3], 0);
- * // => []
- */
- function takeRight(array, n, guard) {
- var length = array == null ? 0 : array.length;
- if (!length) {
- return [];
- }
- n = (guard || n === undefined) ? 1 : toInteger(n);
- n = length - n;
- return baseSlice(array, n < 0 ? 0 : n, length);
- }
- /**
- * Creates a slice of `array` with elements taken from the end. Elements are
- * taken until `predicate` returns falsey. The predicate is invoked with
- * three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': false }
- * ];
- *
- * _.takeRightWhile(users, function(o) { return !o.active; });
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeRightWhile(users, { 'user': 'pebbles', 'active': false });
- * // => objects for ['pebbles']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeRightWhile(users, ['active', false]);
- * // => objects for ['fred', 'pebbles']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeRightWhile(users, 'active');
- * // => []
- */
- function takeRightWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3), false, true)
- : [];
- }
- /**
- * Creates a slice of `array` with elements taken from the beginning. Elements
- * are taken until `predicate` returns falsey. The predicate is invoked with
- * three arguments: (value, index, array).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Array
- * @param {Array} array The array to query.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the slice of `array`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'active': false },
- * { 'user': 'fred', 'active': false },
- * { 'user': 'pebbles', 'active': true }
- * ];
- *
- * _.takeWhile(users, function(o) { return !o.active; });
- * // => objects for ['barney', 'fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.takeWhile(users, { 'user': 'barney', 'active': false });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.takeWhile(users, ['active', false]);
- * // => objects for ['barney', 'fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.takeWhile(users, 'active');
- * // => []
- */
- function takeWhile(array, predicate) {
- return (array && array.length)
- ? baseWhile(array, getIteratee(predicate, 3))
- : [];
- }
- /**
- * Creates an array of unique values, in order, from all given arrays using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.union([2], [1, 2]);
- * // => [2, 1]
- */
- var union = baseRest(function(arrays) {
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true));
- });
- /**
- * This method is like `_.union` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by
- * which uniqueness is computed. Result values are chosen from the first
- * array in which the value occurs. The iteratee is invoked with one argument:
- * (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * _.unionBy([2.1], [1.2, 2.3], Math.floor);
- * // => [2.1, 1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.unionBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- var unionBy = baseRest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), getIteratee(iteratee, 2));
- });
- /**
- * This method is like `_.union` except that it accepts `comparator` which
- * is invoked to compare elements of `arrays`. Result values are chosen from
- * the first array in which the value occurs. The comparator is invoked
- * with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of combined values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.unionWith(objects, others, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var unionWith = baseRest(function(arrays) {
- var comparator = last(arrays);
- comparator = typeof comparator == 'function' ? comparator : undefined;
- return baseUniq(baseFlatten(arrays, 1, isArrayLikeObject, true), undefined, comparator);
- });
- /**
- * Creates a duplicate-free version of an array, using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons, in which only the first occurrence of each element
- * is kept. The order of result values is determined by the order they occur
- * in the array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniq([2, 1, 2]);
- * // => [2, 1]
- */
- function uniq(array) {
- return (array && array.length) ? baseUniq(array) : [];
- }
- /**
- * This method is like `_.uniq` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * uniqueness is computed. The order of result values is determined by the
- * order they occur in the array. The iteratee is invoked with one argument:
- * (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * _.uniqBy([2.1, 1.2, 2.3], Math.floor);
- * // => [2.1, 1.2]
- *
- * // The `_.property` iteratee shorthand.
- * _.uniqBy([{ 'x': 1 }, { 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 1 }, { 'x': 2 }]
- */
- function uniqBy(array, iteratee) {
- return (array && array.length) ? baseUniq(array, getIteratee(iteratee, 2)) : [];
- }
- /**
- * This method is like `_.uniq` except that it accepts `comparator` which
- * is invoked to compare elements of `array`. The order of result values is
- * determined by the order they occur in the array.The comparator is invoked
- * with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new duplicate free array.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.uniqWith(objects, _.isEqual);
- * // => [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }]
- */
- function uniqWith(array, comparator) {
- comparator = typeof comparator == 'function' ? comparator : undefined;
- return (array && array.length) ? baseUniq(array, undefined, comparator) : [];
- }
- /**
- * This method is like `_.zip` except that it accepts an array of grouped
- * elements and creates an array regrouping the elements to their pre-zip
- * configuration.
- *
- * @static
- * @memberOf _
- * @since 1.2.0
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip(['a', 'b'], [1, 2], [true, false]);
- * // => [['a', 1, true], ['b', 2, false]]
- *
- * _.unzip(zipped);
- * // => [['a', 'b'], [1, 2], [true, false]]
- */
- function unzip(array) {
- if (!(array && array.length)) {
- return [];
- }
- var length = 0;
- array = arrayFilter(array, function(group) {
- if (isArrayLikeObject(group)) {
- length = nativeMax(group.length, length);
- return true;
- }
- });
- return baseTimes(length, function(index) {
- return arrayMap(array, baseProperty(index));
- });
- }
- /**
- * This method is like `_.unzip` except that it accepts `iteratee` to specify
- * how regrouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @since 3.8.0
- * @category Array
- * @param {Array} array The array of grouped elements to process.
- * @param {Function} [iteratee=_.identity] The function to combine
- * regrouped values.
- * @returns {Array} Returns the new array of regrouped elements.
- * @example
- *
- * var zipped = _.zip([1, 2], [10, 20], [100, 200]);
- * // => [[1, 10, 100], [2, 20, 200]]
- *
- * _.unzipWith(zipped, _.add);
- * // => [3, 30, 300]
- */
- function unzipWith(array, iteratee) {
- if (!(array && array.length)) {
- return [];
- }
- var result = unzip(array);
- if (iteratee == null) {
- return result;
- }
- return arrayMap(result, function(group) {
- return apply(iteratee, undefined, group);
- });
- }
- /**
- * Creates an array excluding all given values using
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * for equality comparisons.
- *
- * **Note:** Unlike `_.pull`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {Array} array The array to inspect.
- * @param {...*} [values] The values to exclude.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.difference, _.xor
- * @example
- *
- * _.without([2, 1, 2, 3], 1, 2);
- * // => [3]
- */
- var without = baseRest(function(array, values) {
- return isArrayLikeObject(array)
- ? baseDifference(array, values)
- : [];
- });
- /**
- * Creates an array of unique values that is the
- * [symmetric difference](https://en.wikipedia.org/wiki/Symmetric_difference)
- * of the given arrays. The order of result values is determined by the order
- * they occur in the arrays.
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @returns {Array} Returns the new array of filtered values.
- * @see _.difference, _.without
- * @example
- *
- * _.xor([2, 1], [2, 3]);
- * // => [1, 3]
- */
- var xor = baseRest(function(arrays) {
- return baseXor(arrayFilter(arrays, isArrayLikeObject));
- });
- /**
- * This method is like `_.xor` except that it accepts `iteratee` which is
- * invoked for each element of each `arrays` to generate the criterion by
- * which by which they're compared. The order of result values is determined
- * by the order they occur in the arrays. The iteratee is invoked with one
- * argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * _.xorBy([2.1, 1.2], [2.3, 3.4], Math.floor);
- * // => [1.2, 3.4]
- *
- * // The `_.property` iteratee shorthand.
- * _.xorBy([{ 'x': 1 }], [{ 'x': 2 }, { 'x': 1 }], 'x');
- * // => [{ 'x': 2 }]
- */
- var xorBy = baseRest(function(arrays) {
- var iteratee = last(arrays);
- if (isArrayLikeObject(iteratee)) {
- iteratee = undefined;
- }
- return baseXor(arrayFilter(arrays, isArrayLikeObject), getIteratee(iteratee, 2));
- });
- /**
- * This method is like `_.xor` except that it accepts `comparator` which is
- * invoked to compare elements of `arrays`. The order of result values is
- * determined by the order they occur in the arrays. The comparator is invoked
- * with two arguments: (arrVal, othVal).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Array
- * @param {...Array} [arrays] The arrays to inspect.
- * @param {Function} [comparator] The comparator invoked per element.
- * @returns {Array} Returns the new array of filtered values.
- * @example
- *
- * var objects = [{ 'x': 1, 'y': 2 }, { 'x': 2, 'y': 1 }];
- * var others = [{ 'x': 1, 'y': 1 }, { 'x': 1, 'y': 2 }];
- *
- * _.xorWith(objects, others, _.isEqual);
- * // => [{ 'x': 2, 'y': 1 }, { 'x': 1, 'y': 1 }]
- */
- var xorWith = baseRest(function(arrays) {
- var comparator = last(arrays);
- comparator = typeof comparator == 'function' ? comparator : undefined;
- return baseXor(arrayFilter(arrays, isArrayLikeObject), undefined, comparator);
- });
- /**
- * Creates an array of grouped elements, the first of which contains the
- * first elements of the given arrays, the second of which contains the
- * second elements of the given arrays, and so on.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zip(['a', 'b'], [1, 2], [true, false]);
- * // => [['a', 1, true], ['b', 2, false]]
- */
- var zip = baseRest(unzip);
- /**
- * This method is like `_.fromPairs` except that it accepts two arrays,
- * one of property identifiers and one of corresponding values.
- *
- * @static
- * @memberOf _
- * @since 0.4.0
- * @category Array
- * @param {Array} [props=[]] The property identifiers.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObject(['a', 'b'], [1, 2]);
- * // => { 'a': 1, 'b': 2 }
- */
- function zipObject(props, values) {
- return baseZipObject(props || [], values || [], assignValue);
- }
- /**
- * This method is like `_.zipObject` except that it supports property paths.
- *
- * @static
- * @memberOf _
- * @since 4.1.0
- * @category Array
- * @param {Array} [props=[]] The property identifiers.
- * @param {Array} [values=[]] The property values.
- * @returns {Object} Returns the new object.
- * @example
- *
- * _.zipObjectDeep(['a.b[0].c', 'a.b[1].d'], [1, 2]);
- * // => { 'a': { 'b': [{ 'c': 1 }, { 'd': 2 }] } }
- */
- function zipObjectDeep(props, values) {
- return baseZipObject(props || [], values || [], baseSet);
- }
- /**
- * This method is like `_.zip` except that it accepts `iteratee` to specify
- * how grouped values should be combined. The iteratee is invoked with the
- * elements of each group: (...group).
- *
- * @static
- * @memberOf _
- * @since 3.8.0
- * @category Array
- * @param {...Array} [arrays] The arrays to process.
- * @param {Function} [iteratee=_.identity] The function to combine
- * grouped values.
- * @returns {Array} Returns the new array of grouped elements.
- * @example
- *
- * _.zipWith([1, 2], [10, 20], [100, 200], function(a, b, c) {
- * return a + b + c;
- * });
- * // => [111, 222]
- */
- var zipWith = baseRest(function(arrays) {
- var length = arrays.length,
- iteratee = length > 1 ? arrays[length - 1] : undefined;
- iteratee = typeof iteratee == 'function' ? (arrays.pop(), iteratee) : undefined;
- return unzipWith(arrays, iteratee);
- });
- /*------------------------------------------------------------------------*/
- /**
- * Creates a `lodash` wrapper instance that wraps `value` with explicit method
- * chain sequences enabled. The result of such sequences must be unwrapped
- * with `_#value`.
- *
- * @static
- * @memberOf _
- * @since 1.3.0
- * @category Seq
- * @param {*} value The value to wrap.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'pebbles', 'age': 1 }
- * ];
- *
- * var youngest = _
- * .chain(users)
- * .sortBy('age')
- * .map(function(o) {
- * return o.user + ' is ' + o.age;
- * })
- * .head()
- * .value();
- * // => 'pebbles is 1'
- */
- function chain(value) {
- var result = lodash(value);
- result.__chain__ = true;
- return result;
- }
- /**
- * This method invokes `interceptor` and returns `value`. The interceptor
- * is invoked with one argument; (value). The purpose of this method is to
- * "tap into" a method chain sequence in order to modify intermediate results.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns `value`.
- * @example
- *
- * _([1, 2, 3])
- * .tap(function(array) {
- * // Mutate input array.
- * array.pop();
- * })
- * .reverse()
- * .value();
- * // => [2, 1]
- */
- function tap(value, interceptor) {
- interceptor(value);
- return value;
- }
- /**
- * This method is like `_.tap` except that it returns the result of `interceptor`.
- * The purpose of this method is to "pass thru" values replacing intermediate
- * results in a method chain sequence.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Seq
- * @param {*} value The value to provide to `interceptor`.
- * @param {Function} interceptor The function to invoke.
- * @returns {*} Returns the result of `interceptor`.
- * @example
- *
- * _(' abc ')
- * .chain()
- * .trim()
- * .thru(function(value) {
- * return [value];
- * })
- * .value();
- * // => ['abc']
- */
- function thru(value, interceptor) {
- return interceptor(value);
- }
- /**
- * This method is the wrapper version of `_.at`.
- *
- * @name at
- * @memberOf _
- * @since 1.0.0
- * @category Seq
- * @param {...(string|string[])} [paths] The property paths to pick.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
- *
- * _(object).at(['a[0].b.c', 'a[1]']).value();
- * // => [3, 4]
- */
- var wrapperAt = flatRest(function(paths) {
- var length = paths.length,
- start = length ? paths[0] : 0,
- value = this.__wrapped__,
- interceptor = function(object) { return baseAt(object, paths); };
- if (length > 1 || this.__actions__.length ||
- !(value instanceof LazyWrapper) || !isIndex(start)) {
- return this.thru(interceptor);
- }
- value = value.slice(start, +start + (length ? 1 : 0));
- value.__actions__.push({
- 'func': thru,
- 'args': [interceptor],
- 'thisArg': undefined
- });
- return new LodashWrapper(value, this.__chain__).thru(function(array) {
- if (length && !array.length) {
- array.push(undefined);
- }
- return array;
- });
- });
- /**
- * Creates a `lodash` wrapper instance with explicit method chain sequences enabled.
- *
- * @name chain
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 40 }
- * ];
- *
- * // A sequence without explicit chaining.
- * _(users).head();
- * // => { 'user': 'barney', 'age': 36 }
- *
- * // A sequence with explicit chaining.
- * _(users)
- * .chain()
- * .head()
- * .pick('user')
- * .value();
- * // => { 'user': 'barney' }
- */
- function wrapperChain() {
- return chain(this);
- }
- /**
- * Executes the chain sequence and returns the wrapped result.
- *
- * @name commit
- * @memberOf _
- * @since 3.2.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2];
- * var wrapped = _(array).push(3);
- *
- * console.log(array);
- * // => [1, 2]
- *
- * wrapped = wrapped.commit();
- * console.log(array);
- * // => [1, 2, 3]
- *
- * wrapped.last();
- * // => 3
- *
- * console.log(array);
- * // => [1, 2, 3]
- */
- function wrapperCommit() {
- return new LodashWrapper(this.value(), this.__chain__);
- }
- /**
- * Gets the next value on a wrapped object following the
- * [iterator protocol](https://mdn.io/iteration_protocols#iterator).
- *
- * @name next
- * @memberOf _
- * @since 4.0.0
- * @category Seq
- * @returns {Object} Returns the next iterator value.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 1 }
- *
- * wrapped.next();
- * // => { 'done': false, 'value': 2 }
- *
- * wrapped.next();
- * // => { 'done': true, 'value': undefined }
- */
- function wrapperNext() {
- if (this.__values__ === undefined) {
- this.__values__ = toArray(this.value());
- }
- var done = this.__index__ >= this.__values__.length,
- value = done ? undefined : this.__values__[this.__index__++];
- return { 'done': done, 'value': value };
- }
- /**
- * Enables the wrapper to be iterable.
- *
- * @name Symbol.iterator
- * @memberOf _
- * @since 4.0.0
- * @category Seq
- * @returns {Object} Returns the wrapper object.
- * @example
- *
- * var wrapped = _([1, 2]);
- *
- * wrapped[Symbol.iterator]() === wrapped;
- * // => true
- *
- * Array.from(wrapped);
- * // => [1, 2]
- */
- function wrapperToIterator() {
- return this;
- }
- /**
- * Creates a clone of the chain sequence planting `value` as the wrapped value.
- *
- * @name plant
- * @memberOf _
- * @since 3.2.0
- * @category Seq
- * @param {*} value The value to plant.
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var wrapped = _([1, 2]).map(square);
- * var other = wrapped.plant([3, 4]);
- *
- * other.value();
- * // => [9, 16]
- *
- * wrapped.value();
- * // => [1, 4]
- */
- function wrapperPlant(value) {
- var result,
- parent = this;
- while (parent instanceof baseLodash) {
- var clone = wrapperClone(parent);
- clone.__index__ = 0;
- clone.__values__ = undefined;
- if (result) {
- previous.__wrapped__ = clone;
- } else {
- result = clone;
- }
- var previous = clone;
- parent = parent.__wrapped__;
- }
- previous.__wrapped__ = value;
- return result;
- }
- /**
- * This method is the wrapper version of `_.reverse`.
- *
- * **Note:** This method mutates the wrapped array.
- *
- * @name reverse
- * @memberOf _
- * @since 0.1.0
- * @category Seq
- * @returns {Object} Returns the new `lodash` wrapper instance.
- * @example
- *
- * var array = [1, 2, 3];
- *
- * _(array).reverse().value()
- * // => [3, 2, 1]
- *
- * console.log(array);
- * // => [3, 2, 1]
- */
- function wrapperReverse() {
- var value = this.__wrapped__;
- if (value instanceof LazyWrapper) {
- var wrapped = value;
- if (this.__actions__.length) {
- wrapped = new LazyWrapper(this);
- }
- wrapped = wrapped.reverse();
- wrapped.__actions__.push({
- 'func': thru,
- 'args': [reverse],
- 'thisArg': undefined
- });
- return new LodashWrapper(wrapped, this.__chain__);
- }
- return this.thru(reverse);
- }
- /**
- * Executes the chain sequence to resolve the unwrapped value.
- *
- * @name value
- * @memberOf _
- * @since 0.1.0
- * @alias toJSON, valueOf
- * @category Seq
- * @returns {*} Returns the resolved unwrapped value.
- * @example
- *
- * _([1, 2, 3]).value();
- * // => [1, 2, 3]
- */
- function wrapperValue() {
- return baseWrapperValue(this.__wrapped__, this.__actions__);
- }
- /*------------------------------------------------------------------------*/
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The corresponding value of
- * each key is the number of times the key was returned by `iteratee`. The
- * iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.5.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.countBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': 1, '6': 2 }
- *
- * // The `_.property` iteratee shorthand.
- * _.countBy(['one', 'two', 'three'], 'length');
- * // => { '3': 2, '5': 1 }
- */
- var countBy = createAggregator(function(result, value, key) {
- if (hasOwnProperty.call(result, key)) {
- ++result[key];
- } else {
- baseAssignValue(result, key, 1);
- }
- });
- /**
- * Checks if `predicate` returns truthy for **all** elements of `collection`.
- * Iteration is stopped once `predicate` returns falsey. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * **Note:** This method returns `true` for
- * [empty collections](https://en.wikipedia.org/wiki/Empty_set) because
- * [everything is true](https://en.wikipedia.org/wiki/Vacuous_truth) of
- * elements of empty collections.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {boolean} Returns `true` if all elements pass the predicate check,
- * else `false`.
- * @example
- *
- * _.every([true, 1, null, 'yes'], Boolean);
- * // => false
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.every(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.every(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.every(users, 'active');
- * // => false
- */
- function every(collection, predicate, guard) {
- var func = isArray(collection) ? arrayEvery : baseEvery;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
- /**
- * Iterates over elements of `collection`, returning an array of all elements
- * `predicate` returns truthy for. The predicate is invoked with three
- * arguments: (value, index|key, collection).
- *
- * **Note:** Unlike `_.remove`, this method returns a new array.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @see _.reject
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * _.filter(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.filter(users, { 'age': 36, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.filter(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.filter(users, 'active');
- * // => objects for ['barney']
- *
- * // Combining several predicates using `_.overEvery` or `_.overSome`.
- * _.filter(users, _.overSome([{ 'age': 36 }, ['age', 40]]));
- * // => objects for ['fred', 'barney']
- */
- function filter(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- return func(collection, getIteratee(predicate, 3));
- }
- /**
- * Iterates over elements of `collection`, returning the first element
- * `predicate` returns truthy for. The predicate is invoked with three
- * arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param {number} [fromIndex=0] The index to search from.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false },
- * { 'user': 'pebbles', 'age': 1, 'active': true }
- * ];
- *
- * _.find(users, function(o) { return o.age < 40; });
- * // => object for 'barney'
- *
- * // The `_.matches` iteratee shorthand.
- * _.find(users, { 'age': 1, 'active': true });
- * // => object for 'pebbles'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.find(users, ['active', false]);
- * // => object for 'fred'
- *
- * // The `_.property` iteratee shorthand.
- * _.find(users, 'active');
- * // => object for 'barney'
- */
- var find = createFind(findIndex);
- /**
- * This method is like `_.find` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param {number} [fromIndex=collection.length-1] The index to search from.
- * @returns {*} Returns the matched element, else `undefined`.
- * @example
- *
- * _.findLast([1, 2, 3, 4], function(n) {
- * return n % 2 == 1;
- * });
- * // => 3
- */
- var findLast = createFind(findLastIndex);
- /**
- * Creates a flattened array of values by running each element in `collection`
- * thru `iteratee` and flattening the mapped results. The iteratee is invoked
- * with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [n, n];
- * }
- *
- * _.flatMap([1, 2], duplicate);
- * // => [1, 1, 2, 2]
- */
- function flatMap(collection, iteratee) {
- return baseFlatten(map(collection, iteratee), 1);
- }
- /**
- * This method is like `_.flatMap` except that it recursively flattens the
- * mapped results.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [[[n, n]]];
- * }
- *
- * _.flatMapDeep([1, 2], duplicate);
- * // => [1, 1, 2, 2]
- */
- function flatMapDeep(collection, iteratee) {
- return baseFlatten(map(collection, iteratee), INFINITY);
- }
- /**
- * This method is like `_.flatMap` except that it recursively flattens the
- * mapped results up to `depth` times.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {number} [depth=1] The maximum recursion depth.
- * @returns {Array} Returns the new flattened array.
- * @example
- *
- * function duplicate(n) {
- * return [[[n, n]]];
- * }
- *
- * _.flatMapDepth([1, 2], duplicate, 2);
- * // => [[1, 1], [2, 2]]
- */
- function flatMapDepth(collection, iteratee, depth) {
- depth = depth === undefined ? 1 : toInteger(depth);
- return baseFlatten(map(collection, iteratee), depth);
- }
- /**
- * Iterates over elements of `collection` and invokes `iteratee` for each element.
- * The iteratee is invoked with three arguments: (value, index|key, collection).
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * **Note:** As with other "Collections" methods, objects with a "length"
- * property are iterated like arrays. To avoid this behavior use `_.forIn`
- * or `_.forOwn` for object iteration.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @alias each
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @see _.forEachRight
- * @example
- *
- * _.forEach([1, 2], function(value) {
- * console.log(value);
- * });
- * // => Logs `1` then `2`.
- *
- * _.forEach({ 'a': 1, 'b': 2 }, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'a' then 'b' (iteration order is not guaranteed).
- */
- function forEach(collection, iteratee) {
- var func = isArray(collection) ? arrayEach : baseEach;
- return func(collection, getIteratee(iteratee, 3));
- }
- /**
- * This method is like `_.forEach` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @alias eachRight
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array|Object} Returns `collection`.
- * @see _.forEach
- * @example
- *
- * _.forEachRight([1, 2], function(value) {
- * console.log(value);
- * });
- * // => Logs `2` then `1`.
- */
- function forEachRight(collection, iteratee) {
- var func = isArray(collection) ? arrayEachRight : baseEachRight;
- return func(collection, getIteratee(iteratee, 3));
- }
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The order of grouped values
- * is determined by the order they occur in `collection`. The corresponding
- * value of each key is an array of elements responsible for generating the
- * key. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * _.groupBy([6.1, 4.2, 6.3], Math.floor);
- * // => { '4': [4.2], '6': [6.1, 6.3] }
- *
- * // The `_.property` iteratee shorthand.
- * _.groupBy(['one', 'two', 'three'], 'length');
- * // => { '3': ['one', 'two'], '5': ['three'] }
- */
- var groupBy = createAggregator(function(result, value, key) {
- if (hasOwnProperty.call(result, key)) {
- result[key].push(value);
- } else {
- baseAssignValue(result, key, [value]);
- }
- });
- /**
- * Checks if `value` is in `collection`. If `collection` is a string, it's
- * checked for a substring of `value`, otherwise
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * is used for equality comparisons. If `fromIndex` is negative, it's used as
- * the offset from the end of `collection`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object|string} collection The collection to inspect.
- * @param {*} value The value to search for.
- * @param {number} [fromIndex=0] The index to search from.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
- * @returns {boolean} Returns `true` if `value` is found, else `false`.
- * @example
- *
- * _.includes([1, 2, 3], 1);
- * // => true
- *
- * _.includes([1, 2, 3], 1, 2);
- * // => false
- *
- * _.includes({ 'a': 1, 'b': 2 }, 1);
- * // => true
- *
- * _.includes('abcd', 'bc');
- * // => true
- */
- function includes(collection, value, fromIndex, guard) {
- collection = isArrayLike(collection) ? collection : values(collection);
- fromIndex = (fromIndex && !guard) ? toInteger(fromIndex) : 0;
- var length = collection.length;
- if (fromIndex < 0) {
- fromIndex = nativeMax(length + fromIndex, 0);
- }
- return isString(collection)
- ? (fromIndex <= length && collection.indexOf(value, fromIndex) > -1)
- : (!!length && baseIndexOf(collection, value, fromIndex) > -1);
- }
- /**
- * Invokes the method at `path` of each element in `collection`, returning
- * an array of the results of each invoked method. Any additional arguments
- * are provided to each invoked method. If `path` is a function, it's invoked
- * for, and `this` bound to, each element in `collection`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Array|Function|string} path The path of the method to invoke or
- * the function invoked per iteration.
- * @param {...*} [args] The arguments to invoke each method with.
- * @returns {Array} Returns the array of results.
- * @example
- *
- * _.invokeMap([[5, 1, 7], [3, 2, 1]], 'sort');
- * // => [[1, 5, 7], [1, 2, 3]]
- *
- * _.invokeMap([123, 456], String.prototype.split, '');
- * // => [['1', '2', '3'], ['4', '5', '6']]
- */
- var invokeMap = baseRest(function(collection, path, args) {
- var index = -1,
- isFunc = typeof path == 'function',
- result = isArrayLike(collection) ? Array(collection.length) : [];
- baseEach(collection, function(value) {
- result[++index] = isFunc ? apply(path, value, args) : baseInvoke(value, path, args);
- });
- return result;
- });
- /**
- * Creates an object composed of keys generated from the results of running
- * each element of `collection` thru `iteratee`. The corresponding value of
- * each key is the last element responsible for generating the key. The
- * iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee to transform keys.
- * @returns {Object} Returns the composed aggregate object.
- * @example
- *
- * var array = [
- * { 'dir': 'left', 'code': 97 },
- * { 'dir': 'right', 'code': 100 }
- * ];
- *
- * _.keyBy(array, function(o) {
- * return String.fromCharCode(o.code);
- * });
- * // => { 'a': { 'dir': 'left', 'code': 97 }, 'd': { 'dir': 'right', 'code': 100 } }
- *
- * _.keyBy(array, 'dir');
- * // => { 'left': { 'dir': 'left', 'code': 97 }, 'right': { 'dir': 'right', 'code': 100 } }
- */
- var keyBy = createAggregator(function(result, value, key) {
- baseAssignValue(result, key, value);
- });
- /**
- * Creates an array of values by running each element in `collection` thru
- * `iteratee`. The iteratee is invoked with three arguments:
- * (value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.every`, `_.filter`, `_.map`, `_.mapValues`, `_.reject`, and `_.some`.
- *
- * The guarded methods are:
- * `ary`, `chunk`, `curry`, `curryRight`, `drop`, `dropRight`, `every`,
- * `fill`, `invert`, `parseInt`, `random`, `range`, `rangeRight`, `repeat`,
- * `sampleSize`, `slice`, `some`, `sortBy`, `split`, `take`, `takeRight`,
- * `template`, `trim`, `trimEnd`, `trimStart`, and `words`
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new mapped array.
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * _.map([4, 8], square);
- * // => [16, 64]
- *
- * _.map({ 'a': 4, 'b': 8 }, square);
- * // => [16, 64] (iteration order is not guaranteed)
- *
- * var users = [
- * { 'user': 'barney' },
- * { 'user': 'fred' }
- * ];
- *
- * // The `_.property` iteratee shorthand.
- * _.map(users, 'user');
- * // => ['barney', 'fred']
- */
- function map(collection, iteratee) {
- var func = isArray(collection) ? arrayMap : baseMap;
- return func(collection, getIteratee(iteratee, 3));
- }
- /**
- * This method is like `_.sortBy` except that it allows specifying the sort
- * orders of the iteratees to sort by. If `orders` is unspecified, all values
- * are sorted in ascending order. Otherwise, specify an order of "desc" for
- * descending or "asc" for ascending sort order of corresponding values.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Array[]|Function[]|Object[]|string[]} [iteratees=[_.identity]]
- * The iteratees to sort by.
- * @param {string[]} [orders] The sort orders of `iteratees`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.reduce`.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 34 },
- * { 'user': 'fred', 'age': 40 },
- * { 'user': 'barney', 'age': 36 }
- * ];
- *
- * // Sort by `user` in ascending order and by `age` in descending order.
- * _.orderBy(users, ['user', 'age'], ['asc', 'desc']);
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 40]]
- */
- function orderBy(collection, iteratees, orders, guard) {
- if (collection == null) {
- return [];
- }
- if (!isArray(iteratees)) {
- iteratees = iteratees == null ? [] : [iteratees];
- }
- orders = guard ? undefined : orders;
- if (!isArray(orders)) {
- orders = orders == null ? [] : [orders];
- }
- return baseOrderBy(collection, iteratees, orders);
- }
- /**
- * Creates an array of elements split into two groups, the first of which
- * contains elements `predicate` returns truthy for, the second of which
- * contains elements `predicate` returns falsey for. The predicate is
- * invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the array of grouped elements.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true },
- * { 'user': 'pebbles', 'age': 1, 'active': false }
- * ];
- *
- * _.partition(users, function(o) { return o.active; });
- * // => objects for [['fred'], ['barney', 'pebbles']]
- *
- * // The `_.matches` iteratee shorthand.
- * _.partition(users, { 'age': 1, 'active': false });
- * // => objects for [['pebbles'], ['barney', 'fred']]
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.partition(users, ['active', false]);
- * // => objects for [['barney', 'pebbles'], ['fred']]
- *
- * // The `_.property` iteratee shorthand.
- * _.partition(users, 'active');
- * // => objects for [['fred'], ['barney', 'pebbles']]
- */
- var partition = createAggregator(function(result, value, key) {
- result[key ? 0 : 1].push(value);
- }, function() { return [[], []]; });
- /**
- * Reduces `collection` to a value which is the accumulated result of running
- * each element in `collection` thru `iteratee`, where each successive
- * invocation is supplied the return value of the previous. If `accumulator`
- * is not given, the first element of `collection` is used as the initial
- * value. The iteratee is invoked with four arguments:
- * (accumulator, value, index|key, collection).
- *
- * Many lodash methods are guarded to work as iteratees for methods like
- * `_.reduce`, `_.reduceRight`, and `_.transform`.
- *
- * The guarded methods are:
- * `assign`, `defaults`, `defaultsDeep`, `includes`, `merge`, `orderBy`,
- * and `sortBy`
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @see _.reduceRight
- * @example
- *
- * _.reduce([1, 2], function(sum, n) {
- * return sum + n;
- * }, 0);
- * // => 3
- *
- * _.reduce({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
- * (result[value] || (result[value] = [])).push(key);
- * return result;
- * }, {});
- * // => { '1': ['a', 'c'], '2': ['b'] } (iteration order is not guaranteed)
- */
- function reduce(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduce : baseReduce,
- initAccum = arguments.length < 3;
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEach);
- }
- /**
- * This method is like `_.reduce` except that it iterates over elements of
- * `collection` from right to left.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The initial value.
- * @returns {*} Returns the accumulated value.
- * @see _.reduce
- * @example
- *
- * var array = [[0, 1], [2, 3], [4, 5]];
- *
- * _.reduceRight(array, function(flattened, other) {
- * return flattened.concat(other);
- * }, []);
- * // => [4, 5, 2, 3, 0, 1]
- */
- function reduceRight(collection, iteratee, accumulator) {
- var func = isArray(collection) ? arrayReduceRight : baseReduce,
- initAccum = arguments.length < 3;
- return func(collection, getIteratee(iteratee, 4), accumulator, initAccum, baseEachRight);
- }
- /**
- * The opposite of `_.filter`; this method returns the elements of `collection`
- * that `predicate` does **not** return truthy for.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the new filtered array.
- * @see _.filter
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': false },
- * { 'user': 'fred', 'age': 40, 'active': true }
- * ];
- *
- * _.reject(users, function(o) { return !o.active; });
- * // => objects for ['fred']
- *
- * // The `_.matches` iteratee shorthand.
- * _.reject(users, { 'age': 40, 'active': true });
- * // => objects for ['barney']
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.reject(users, ['active', false]);
- * // => objects for ['fred']
- *
- * // The `_.property` iteratee shorthand.
- * _.reject(users, 'active');
- * // => objects for ['barney']
- */
- function reject(collection, predicate) {
- var func = isArray(collection) ? arrayFilter : baseFilter;
- return func(collection, negate(getIteratee(predicate, 3)));
- }
- /**
- * Gets a random element from `collection`.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @returns {*} Returns the random element.
- * @example
- *
- * _.sample([1, 2, 3, 4]);
- * // => 2
- */
- function sample(collection) {
- var func = isArray(collection) ? arraySample : baseSample;
- return func(collection);
- }
- /**
- * Gets `n` random elements at unique keys from `collection` up to the
- * size of `collection`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Collection
- * @param {Array|Object} collection The collection to sample.
- * @param {number} [n=1] The number of elements to sample.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the random elements.
- * @example
- *
- * _.sampleSize([1, 2, 3], 2);
- * // => [3, 1]
- *
- * _.sampleSize([1, 2, 3], 4);
- * // => [2, 3, 1]
- */
- function sampleSize(collection, n, guard) {
- if ((guard ? isIterateeCall(collection, n, guard) : n === undefined)) {
- n = 1;
- } else {
- n = toInteger(n);
- }
- var func = isArray(collection) ? arraySampleSize : baseSampleSize;
- return func(collection, n);
- }
- /**
- * Creates an array of shuffled values, using a version of the
- * [Fisher-Yates shuffle](https://en.wikipedia.org/wiki/Fisher-Yates_shuffle).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to shuffle.
- * @returns {Array} Returns the new shuffled array.
- * @example
- *
- * _.shuffle([1, 2, 3, 4]);
- * // => [4, 1, 3, 2]
- */
- function shuffle(collection) {
- var func = isArray(collection) ? arrayShuffle : baseShuffle;
- return func(collection);
- }
- /**
- * Gets the size of `collection` by returning its length for array-like
- * values or the number of own enumerable string keyed properties for objects.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object|string} collection The collection to inspect.
- * @returns {number} Returns the collection size.
- * @example
- *
- * _.size([1, 2, 3]);
- * // => 3
- *
- * _.size({ 'a': 1, 'b': 2 });
- * // => 2
- *
- * _.size('pebbles');
- * // => 7
- */
- function size(collection) {
- if (collection == null) {
- return 0;
- }
- if (isArrayLike(collection)) {
- return isString(collection) ? stringSize(collection) : collection.length;
- }
- var tag = getTag(collection);
- if (tag == mapTag || tag == setTag) {
- return collection.size;
- }
- return baseKeys(collection).length;
- }
- /**
- * Checks if `predicate` returns truthy for **any** element of `collection`.
- * Iteration is stopped once `predicate` returns truthy. The predicate is
- * invoked with three arguments: (value, index|key, collection).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {boolean} Returns `true` if any element passes the predicate check,
- * else `false`.
- * @example
- *
- * _.some([null, 0, 'yes', false], Boolean);
- * // => true
- *
- * var users = [
- * { 'user': 'barney', 'active': true },
- * { 'user': 'fred', 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.some(users, { 'user': 'barney', 'active': false });
- * // => false
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.some(users, ['active', false]);
- * // => true
- *
- * // The `_.property` iteratee shorthand.
- * _.some(users, 'active');
- * // => true
- */
- function some(collection, predicate, guard) {
- var func = isArray(collection) ? arraySome : baseSome;
- if (guard && isIterateeCall(collection, predicate, guard)) {
- predicate = undefined;
- }
- return func(collection, getIteratee(predicate, 3));
- }
- /**
- * Creates an array of elements, sorted in ascending order by the results of
- * running each element in a collection thru each iteratee. This method
- * performs a stable sort, that is, it preserves the original sort order of
- * equal elements. The iteratees are invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Collection
- * @param {Array|Object} collection The collection to iterate over.
- * @param {...(Function|Function[])} [iteratees=[_.identity]]
- * The iteratees to sort by.
- * @returns {Array} Returns the new sorted array.
- * @example
- *
- * var users = [
- * { 'user': 'fred', 'age': 48 },
- * { 'user': 'barney', 'age': 36 },
- * { 'user': 'fred', 'age': 30 },
- * { 'user': 'barney', 'age': 34 }
- * ];
- *
- * _.sortBy(users, [function(o) { return o.user; }]);
- * // => objects for [['barney', 36], ['barney', 34], ['fred', 48], ['fred', 30]]
- *
- * _.sortBy(users, ['user', 'age']);
- * // => objects for [['barney', 34], ['barney', 36], ['fred', 30], ['fred', 48]]
- */
- var sortBy = baseRest(function(collection, iteratees) {
- if (collection == null) {
- return [];
- }
- var length = iteratees.length;
- if (length > 1 && isIterateeCall(collection, iteratees[0], iteratees[1])) {
- iteratees = [];
- } else if (length > 2 && isIterateeCall(iteratees[0], iteratees[1], iteratees[2])) {
- iteratees = [iteratees[0]];
- }
- return baseOrderBy(collection, baseFlatten(iteratees, 1), []);
- });
- /*------------------------------------------------------------------------*/
- /**
- * Gets the timestamp of the number of milliseconds that have elapsed since
- * the Unix epoch (1 January 1970 00:00:00 UTC).
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Date
- * @returns {number} Returns the timestamp.
- * @example
- *
- * _.defer(function(stamp) {
- * console.log(_.now() - stamp);
- * }, _.now());
- * // => Logs the number of milliseconds it took for the deferred invocation.
- */
- var now = ctxNow || function() {
- return root.Date.now();
- };
- /*------------------------------------------------------------------------*/
- /**
- * The opposite of `_.before`; this method creates a function that invokes
- * `func` once it's called `n` or more times.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {number} n The number of calls before `func` is invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var saves = ['profile', 'settings'];
- *
- * var done = _.after(saves.length, function() {
- * console.log('done saving!');
- * });
- *
- * _.forEach(saves, function(type) {
- * asyncSave({ 'type': type, 'complete': done });
- * });
- * // => Logs 'done saving!' after the two async saves have completed.
- */
- function after(n, func) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n < 1) {
- return func.apply(this, arguments);
- }
- };
- }
- /**
- * Creates a function that invokes `func`, with up to `n` arguments,
- * ignoring any additional arguments.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @param {number} [n=func.length] The arity cap.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new capped function.
- * @example
- *
- * _.map(['6', '8', '10'], _.ary(parseInt, 1));
- * // => [6, 8, 10]
- */
- function ary(func, n, guard) {
- n = guard ? undefined : n;
- n = (func && n == null) ? func.length : n;
- return createWrap(func, WRAP_ARY_FLAG, undefined, undefined, undefined, undefined, n);
- }
- /**
- * Creates a function that invokes `func`, with the `this` binding and arguments
- * of the created function, while it's called less than `n` times. Subsequent
- * calls to the created function return the result of the last `func` invocation.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {number} n The number of calls at which `func` is no longer invoked.
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * jQuery(element).on('click', _.before(5, addContactToList));
- * // => Allows adding up to 4 contacts to the list.
- */
- function before(n, func) {
- var result;
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- n = toInteger(n);
- return function() {
- if (--n > 0) {
- result = func.apply(this, arguments);
- }
- if (n <= 1) {
- func = undefined;
- }
- return result;
- };
- }
- /**
- * Creates a function that invokes `func` with the `this` binding of `thisArg`
- * and `partials` prepended to the arguments it receives.
- *
- * The `_.bind.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for partially applied arguments.
- *
- * **Note:** Unlike native `Function#bind`, this method doesn't set the "length"
- * property of bound functions.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to bind.
- * @param {*} thisArg The `this` binding of `func`.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * function greet(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * }
- *
- * var object = { 'user': 'fred' };
- *
- * var bound = _.bind(greet, object, 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bind(greet, object, _, '!');
- * bound('hi');
- * // => 'hi fred!'
- */
- var bind = baseRest(function(func, thisArg, partials) {
- var bitmask = WRAP_BIND_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getHolder(bind));
- bitmask |= WRAP_PARTIAL_FLAG;
- }
- return createWrap(func, bitmask, thisArg, partials, holders);
- });
- /**
- * Creates a function that invokes the method at `object[key]` with `partials`
- * prepended to the arguments it receives.
- *
- * This method differs from `_.bind` by allowing bound functions to reference
- * methods that may be redefined or don't yet exist. See
- * [Peter Michaux's article](http://peter.michaux.ca/articles/lazy-function-definition-pattern)
- * for more details.
- *
- * The `_.bindKey.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * @static
- * @memberOf _
- * @since 0.10.0
- * @category Function
- * @param {Object} object The object to invoke the method on.
- * @param {string} key The key of the method.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new bound function.
- * @example
- *
- * var object = {
- * 'user': 'fred',
- * 'greet': function(greeting, punctuation) {
- * return greeting + ' ' + this.user + punctuation;
- * }
- * };
- *
- * var bound = _.bindKey(object, 'greet', 'hi');
- * bound('!');
- * // => 'hi fred!'
- *
- * object.greet = function(greeting, punctuation) {
- * return greeting + 'ya ' + this.user + punctuation;
- * };
- *
- * bound('!');
- * // => 'hiya fred!'
- *
- * // Bound with placeholders.
- * var bound = _.bindKey(object, 'greet', _, '!');
- * bound('hi');
- * // => 'hiya fred!'
- */
- var bindKey = baseRest(function(object, key, partials) {
- var bitmask = WRAP_BIND_FLAG | WRAP_BIND_KEY_FLAG;
- if (partials.length) {
- var holders = replaceHolders(partials, getHolder(bindKey));
- bitmask |= WRAP_PARTIAL_FLAG;
- }
- return createWrap(key, bitmask, object, partials, holders);
- });
- /**
- * Creates a function that accepts arguments of `func` and either invokes
- * `func` returning its result, if at least `arity` number of arguments have
- * been provided, or returns a function that accepts the remaining `func`
- * arguments, and so on. The arity of `func` may be specified if `func.length`
- * is not sufficient.
- *
- * The `_.curry.placeholder` value, which defaults to `_` in monolithic builds,
- * may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curry(abc);
- *
- * curried(1)(2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2)(3);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(1)(_, 3)(2);
- * // => [1, 2, 3]
- */
- function curry(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrap(func, WRAP_CURRY_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curry.placeholder;
- return result;
- }
- /**
- * This method is like `_.curry` except that arguments are applied to `func`
- * in the manner of `_.partialRight` instead of `_.partial`.
- *
- * The `_.curryRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for provided arguments.
- *
- * **Note:** This method doesn't set the "length" property of curried functions.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to curry.
- * @param {number} [arity=func.length] The arity of `func`.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the new curried function.
- * @example
- *
- * var abc = function(a, b, c) {
- * return [a, b, c];
- * };
- *
- * var curried = _.curryRight(abc);
- *
- * curried(3)(2)(1);
- * // => [1, 2, 3]
- *
- * curried(2, 3)(1);
- * // => [1, 2, 3]
- *
- * curried(1, 2, 3);
- * // => [1, 2, 3]
- *
- * // Curried with placeholders.
- * curried(3)(1, _)(2);
- * // => [1, 2, 3]
- */
- function curryRight(func, arity, guard) {
- arity = guard ? undefined : arity;
- var result = createWrap(func, WRAP_CURRY_RIGHT_FLAG, undefined, undefined, undefined, undefined, undefined, arity);
- result.placeholder = curryRight.placeholder;
- return result;
- }
- /**
- * Creates a debounced function that delays invoking `func` until after `wait`
- * milliseconds have elapsed since the last time the debounced function was
- * invoked. The debounced function comes with a `cancel` method to cancel
- * delayed `func` invocations and a `flush` method to immediately invoke them.
- * Provide `options` to indicate whether `func` should be invoked on the
- * leading and/or trailing edge of the `wait` timeout. The `func` is invoked
- * with the last arguments provided to the debounced function. Subsequent
- * calls to the debounced function return the result of the last `func`
- * invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is
- * invoked on the trailing edge of the timeout only if the debounced function
- * is invoked more than once during the `wait` timeout.
- *
- * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
- * until to the next tick, similar to `setTimeout` with a timeout of `0`.
- *
- * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
- * for details over the differences between `_.debounce` and `_.throttle`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to debounce.
- * @param {number} [wait=0] The number of milliseconds to delay.
- * @param {Object} [options={}] The options object.
- * @param {boolean} [options.leading=false]
- * Specify invoking on the leading edge of the timeout.
- * @param {number} [options.maxWait]
- * The maximum time `func` is allowed to be delayed before it's invoked.
- * @param {boolean} [options.trailing=true]
- * Specify invoking on the trailing edge of the timeout.
- * @returns {Function} Returns the new debounced function.
- * @example
- *
- * // Avoid costly calculations while the window size is in flux.
- * jQuery(window).on('resize', _.debounce(calculateLayout, 150));
- *
- * // Invoke `sendMail` when clicked, debouncing subsequent calls.
- * jQuery(element).on('click', _.debounce(sendMail, 300, {
- * 'leading': true,
- * 'trailing': false
- * }));
- *
- * // Ensure `batchLog` is invoked once after 1 second of debounced calls.
- * var debounced = _.debounce(batchLog, 250, { 'maxWait': 1000 });
- * var source = new EventSource('/stream');
- * jQuery(source).on('message', debounced);
- *
- * // Cancel the trailing debounced invocation.
- * jQuery(window).on('popstate', debounced.cancel);
- */
- function debounce(func, wait, options) {
- var lastArgs,
- lastThis,
- maxWait,
- result,
- timerId,
- lastCallTime,
- lastInvokeTime = 0,
- leading = false,
- maxing = false,
- trailing = true;
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- wait = toNumber(wait) || 0;
- if (isObject(options)) {
- leading = !!options.leading;
- maxing = 'maxWait' in options;
- maxWait = maxing ? nativeMax(toNumber(options.maxWait) || 0, wait) : maxWait;
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
- function invokeFunc(time) {
- var args = lastArgs,
- thisArg = lastThis;
- lastArgs = lastThis = undefined;
- lastInvokeTime = time;
- result = func.apply(thisArg, args);
- return result;
- }
- function leadingEdge(time) {
- // Reset any `maxWait` timer.
- lastInvokeTime = time;
- // Start the timer for the trailing edge.
- timerId = setTimeout(timerExpired, wait);
- // Invoke the leading edge.
- return leading ? invokeFunc(time) : result;
- }
- function remainingWait(time) {
- var timeSinceLastCall = time - lastCallTime,
- timeSinceLastInvoke = time - lastInvokeTime,
- timeWaiting = wait - timeSinceLastCall;
- return maxing
- ? nativeMin(timeWaiting, maxWait - timeSinceLastInvoke)
- : timeWaiting;
- }
- function shouldInvoke(time) {
- var timeSinceLastCall = time - lastCallTime,
- timeSinceLastInvoke = time - lastInvokeTime;
- // Either this is the first call, activity has stopped and we're at the
- // trailing edge, the system time has gone backwards and we're treating
- // it as the trailing edge, or we've hit the `maxWait` limit.
- return (lastCallTime === undefined || (timeSinceLastCall >= wait) ||
- (timeSinceLastCall < 0) || (maxing && timeSinceLastInvoke >= maxWait));
- }
- function timerExpired() {
- var time = now();
- if (shouldInvoke(time)) {
- return trailingEdge(time);
- }
- // Restart the timer.
- timerId = setTimeout(timerExpired, remainingWait(time));
- }
- function trailingEdge(time) {
- timerId = undefined;
- // Only invoke if we have `lastArgs` which means `func` has been
- // debounced at least once.
- if (trailing && lastArgs) {
- return invokeFunc(time);
- }
- lastArgs = lastThis = undefined;
- return result;
- }
- function cancel() {
- if (timerId !== undefined) {
- clearTimeout(timerId);
- }
- lastInvokeTime = 0;
- lastArgs = lastCallTime = lastThis = timerId = undefined;
- }
- function flush() {
- return timerId === undefined ? result : trailingEdge(now());
- }
- function debounced() {
- var time = now(),
- isInvoking = shouldInvoke(time);
- lastArgs = arguments;
- lastThis = this;
- lastCallTime = time;
- if (isInvoking) {
- if (timerId === undefined) {
- return leadingEdge(lastCallTime);
- }
- if (maxing) {
- // Handle invocations in a tight loop.
- clearTimeout(timerId);
- timerId = setTimeout(timerExpired, wait);
- return invokeFunc(lastCallTime);
- }
- }
- if (timerId === undefined) {
- timerId = setTimeout(timerExpired, wait);
- }
- return result;
- }
- debounced.cancel = cancel;
- debounced.flush = flush;
- return debounced;
- }
- /**
- * Defers invoking the `func` until the current call stack has cleared. Any
- * additional arguments are provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to defer.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.defer(function(text) {
- * console.log(text);
- * }, 'deferred');
- * // => Logs 'deferred' after one millisecond.
- */
- var defer = baseRest(function(func, args) {
- return baseDelay(func, 1, args);
- });
- /**
- * Invokes `func` after `wait` milliseconds. Any additional arguments are
- * provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to delay.
- * @param {number} wait The number of milliseconds to delay invocation.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {number} Returns the timer id.
- * @example
- *
- * _.delay(function(text) {
- * console.log(text);
- * }, 1000, 'later');
- * // => Logs 'later' after one second.
- */
- var delay = baseRest(function(func, wait, args) {
- return baseDelay(func, toNumber(wait) || 0, args);
- });
- /**
- * Creates a function that invokes `func` with arguments reversed.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to flip arguments for.
- * @returns {Function} Returns the new flipped function.
- * @example
- *
- * var flipped = _.flip(function() {
- * return _.toArray(arguments);
- * });
- *
- * flipped('a', 'b', 'c', 'd');
- * // => ['d', 'c', 'b', 'a']
- */
- function flip(func) {
- return createWrap(func, WRAP_FLIP_FLAG);
- }
- /**
- * Creates a function that memoizes the result of `func`. If `resolver` is
- * provided, it determines the cache key for storing the result based on the
- * arguments provided to the memoized function. By default, the first argument
- * provided to the memoized function is used as the map cache key. The `func`
- * is invoked with the `this` binding of the memoized function.
- *
- * **Note:** The cache is exposed as the `cache` property on the memoized
- * function. Its creation may be customized by replacing the `_.memoize.Cache`
- * constructor with one whose instances implement the
- * [`Map`](http://ecma-international.org/ecma-262/7.0/#sec-properties-of-the-map-prototype-object)
- * method interface of `clear`, `delete`, `get`, `has`, and `set`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to have its output memoized.
- * @param {Function} [resolver] The function to resolve the cache key.
- * @returns {Function} Returns the new memoized function.
- * @example
- *
- * var object = { 'a': 1, 'b': 2 };
- * var other = { 'c': 3, 'd': 4 };
- *
- * var values = _.memoize(_.values);
- * values(object);
- * // => [1, 2]
- *
- * values(other);
- * // => [3, 4]
- *
- * object.a = 2;
- * values(object);
- * // => [1, 2]
- *
- * // Modify the result cache.
- * values.cache.set(object, ['a', 'b']);
- * values(object);
- * // => ['a', 'b']
- *
- * // Replace `_.memoize.Cache`.
- * _.memoize.Cache = WeakMap;
- */
- function memoize(func, resolver) {
- if (typeof func != 'function' || (resolver != null && typeof resolver != 'function')) {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- var memoized = function() {
- var args = arguments,
- key = resolver ? resolver.apply(this, args) : args[0],
- cache = memoized.cache;
- if (cache.has(key)) {
- return cache.get(key);
- }
- var result = func.apply(this, args);
- memoized.cache = cache.set(key, result) || cache;
- return result;
- };
- memoized.cache = new (memoize.Cache || MapCache);
- return memoized;
- }
- // Expose `MapCache`.
- memoize.Cache = MapCache;
- /**
- * Creates a function that negates the result of the predicate `func`. The
- * `func` predicate is invoked with the `this` binding and arguments of the
- * created function.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} predicate The predicate to negate.
- * @returns {Function} Returns the new negated function.
- * @example
- *
- * function isEven(n) {
- * return n % 2 == 0;
- * }
- *
- * _.filter([1, 2, 3, 4, 5, 6], _.negate(isEven));
- * // => [1, 3, 5]
- */
- function negate(predicate) {
- if (typeof predicate != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return function() {
- var args = arguments;
- switch (args.length) {
- case 0: return !predicate.call(this);
- case 1: return !predicate.call(this, args[0]);
- case 2: return !predicate.call(this, args[0], args[1]);
- case 3: return !predicate.call(this, args[0], args[1], args[2]);
- }
- return !predicate.apply(this, args);
- };
- }
- /**
- * Creates a function that is restricted to invoking `func` once. Repeat calls
- * to the function return the value of the first invocation. The `func` is
- * invoked with the `this` binding and arguments of the created function.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to restrict.
- * @returns {Function} Returns the new restricted function.
- * @example
- *
- * var initialize = _.once(createApplication);
- * initialize();
- * initialize();
- * // => `createApplication` is invoked once
- */
- function once(func) {
- return before(2, func);
- }
- /**
- * Creates a function that invokes `func` with its arguments transformed.
- *
- * @static
- * @since 4.0.0
- * @memberOf _
- * @category Function
- * @param {Function} func The function to wrap.
- * @param {...(Function|Function[])} [transforms=[_.identity]]
- * The argument transforms.
- * @returns {Function} Returns the new function.
- * @example
- *
- * function doubled(n) {
- * return n * 2;
- * }
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var func = _.overArgs(function(x, y) {
- * return [x, y];
- * }, [square, doubled]);
- *
- * func(9, 3);
- * // => [81, 6]
- *
- * func(10, 5);
- * // => [100, 10]
- */
- var overArgs = castRest(function(func, transforms) {
- transforms = (transforms.length == 1 && isArray(transforms[0]))
- ? arrayMap(transforms[0], baseUnary(getIteratee()))
- : arrayMap(baseFlatten(transforms, 1), baseUnary(getIteratee()));
- var funcsLength = transforms.length;
- return baseRest(function(args) {
- var index = -1,
- length = nativeMin(args.length, funcsLength);
- while (++index < length) {
- args[index] = transforms[index].call(this, args[index]);
- }
- return apply(func, this, args);
- });
- });
- /**
- * Creates a function that invokes `func` with `partials` prepended to the
- * arguments it receives. This method is like `_.bind` except it does **not**
- * alter the `this` binding.
- *
- * The `_.partial.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
- *
- * @static
- * @memberOf _
- * @since 0.2.0
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * function greet(greeting, name) {
- * return greeting + ' ' + name;
- * }
- *
- * var sayHelloTo = _.partial(greet, 'hello');
- * sayHelloTo('fred');
- * // => 'hello fred'
- *
- * // Partially applied with placeholders.
- * var greetFred = _.partial(greet, _, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- */
- var partial = baseRest(function(func, partials) {
- var holders = replaceHolders(partials, getHolder(partial));
- return createWrap(func, WRAP_PARTIAL_FLAG, undefined, partials, holders);
- });
- /**
- * This method is like `_.partial` except that partially applied arguments
- * are appended to the arguments it receives.
- *
- * The `_.partialRight.placeholder` value, which defaults to `_` in monolithic
- * builds, may be used as a placeholder for partially applied arguments.
- *
- * **Note:** This method doesn't set the "length" property of partially
- * applied functions.
- *
- * @static
- * @memberOf _
- * @since 1.0.0
- * @category Function
- * @param {Function} func The function to partially apply arguments to.
- * @param {...*} [partials] The arguments to be partially applied.
- * @returns {Function} Returns the new partially applied function.
- * @example
- *
- * function greet(greeting, name) {
- * return greeting + ' ' + name;
- * }
- *
- * var greetFred = _.partialRight(greet, 'fred');
- * greetFred('hi');
- * // => 'hi fred'
- *
- * // Partially applied with placeholders.
- * var sayHelloTo = _.partialRight(greet, 'hello', _);
- * sayHelloTo('fred');
- * // => 'hello fred'
- */
- var partialRight = baseRest(function(func, partials) {
- var holders = replaceHolders(partials, getHolder(partialRight));
- return createWrap(func, WRAP_PARTIAL_RIGHT_FLAG, undefined, partials, holders);
- });
- /**
- * Creates a function that invokes `func` with arguments arranged according
- * to the specified `indexes` where the argument value at the first index is
- * provided as the first argument, the argument value at the second index is
- * provided as the second argument, and so on.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Function
- * @param {Function} func The function to rearrange arguments for.
- * @param {...(number|number[])} indexes The arranged argument indexes.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var rearged = _.rearg(function(a, b, c) {
- * return [a, b, c];
- * }, [2, 0, 1]);
- *
- * rearged('b', 'c', 'a')
- * // => ['a', 'b', 'c']
- */
- var rearg = flatRest(function(func, indexes) {
- return createWrap(func, WRAP_REARG_FLAG, undefined, undefined, undefined, indexes);
- });
- /**
- * Creates a function that invokes `func` with the `this` binding of the
- * created function and arguments from `start` and beyond provided as
- * an array.
- *
- * **Note:** This method is based on the
- * [rest parameter](https://mdn.io/rest_parameters).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to apply a rest parameter to.
- * @param {number} [start=func.length-1] The start position of the rest parameter.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.rest(function(what, names) {
- * return what + ' ' + _.initial(names).join(', ') +
- * (_.size(names) > 1 ? ', & ' : '') + _.last(names);
- * });
- *
- * say('hello', 'fred', 'barney', 'pebbles');
- * // => 'hello fred, barney, & pebbles'
- */
- function rest(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = start === undefined ? start : toInteger(start);
- return baseRest(func, start);
- }
- /**
- * Creates a function that invokes `func` with the `this` binding of the
- * create function and an array of arguments much like
- * [`Function#apply`](http://www.ecma-international.org/ecma-262/7.0/#sec-function.prototype.apply).
- *
- * **Note:** This method is based on the
- * [spread operator](https://mdn.io/spread_operator).
- *
- * @static
- * @memberOf _
- * @since 3.2.0
- * @category Function
- * @param {Function} func The function to spread arguments over.
- * @param {number} [start=0] The start position of the spread.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var say = _.spread(function(who, what) {
- * return who + ' says ' + what;
- * });
- *
- * say(['fred', 'hello']);
- * // => 'fred says hello'
- *
- * var numbers = Promise.all([
- * Promise.resolve(40),
- * Promise.resolve(36)
- * ]);
- *
- * numbers.then(_.spread(function(x, y) {
- * return x + y;
- * }));
- * // => a Promise of 76
- */
- function spread(func, start) {
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- start = start == null ? 0 : nativeMax(toInteger(start), 0);
- return baseRest(function(args) {
- var array = args[start],
- otherArgs = castSlice(args, 0, start);
- if (array) {
- arrayPush(otherArgs, array);
- }
- return apply(func, this, otherArgs);
- });
- }
- /**
- * Creates a throttled function that only invokes `func` at most once per
- * every `wait` milliseconds. The throttled function comes with a `cancel`
- * method to cancel delayed `func` invocations and a `flush` method to
- * immediately invoke them. Provide `options` to indicate whether `func`
- * should be invoked on the leading and/or trailing edge of the `wait`
- * timeout. The `func` is invoked with the last arguments provided to the
- * throttled function. Subsequent calls to the throttled function return the
- * result of the last `func` invocation.
- *
- * **Note:** If `leading` and `trailing` options are `true`, `func` is
- * invoked on the trailing edge of the timeout only if the throttled function
- * is invoked more than once during the `wait` timeout.
- *
- * If `wait` is `0` and `leading` is `false`, `func` invocation is deferred
- * until to the next tick, similar to `setTimeout` with a timeout of `0`.
- *
- * See [David Corbacho's article](https://css-tricks.com/debouncing-throttling-explained-examples/)
- * for details over the differences between `_.throttle` and `_.debounce`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {Function} func The function to throttle.
- * @param {number} [wait=0] The number of milliseconds to throttle invocations to.
- * @param {Object} [options={}] The options object.
- * @param {boolean} [options.leading=true]
- * Specify invoking on the leading edge of the timeout.
- * @param {boolean} [options.trailing=true]
- * Specify invoking on the trailing edge of the timeout.
- * @returns {Function} Returns the new throttled function.
- * @example
- *
- * // Avoid excessively updating the position while scrolling.
- * jQuery(window).on('scroll', _.throttle(updatePosition, 100));
- *
- * // Invoke `renewToken` when the click event is fired, but not more than once every 5 minutes.
- * var throttled = _.throttle(renewToken, 300000, { 'trailing': false });
- * jQuery(element).on('click', throttled);
- *
- * // Cancel the trailing throttled invocation.
- * jQuery(window).on('popstate', throttled.cancel);
- */
- function throttle(func, wait, options) {
- var leading = true,
- trailing = true;
- if (typeof func != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- if (isObject(options)) {
- leading = 'leading' in options ? !!options.leading : leading;
- trailing = 'trailing' in options ? !!options.trailing : trailing;
- }
- return debounce(func, wait, {
- 'leading': leading,
- 'maxWait': wait,
- 'trailing': trailing
- });
- }
- /**
- * Creates a function that accepts up to one argument, ignoring any
- * additional arguments.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Function
- * @param {Function} func The function to cap arguments for.
- * @returns {Function} Returns the new capped function.
- * @example
- *
- * _.map(['6', '8', '10'], _.unary(parseInt));
- * // => [6, 8, 10]
- */
- function unary(func) {
- return ary(func, 1);
- }
- /**
- * Creates a function that provides `value` to `wrapper` as its first
- * argument. Any additional arguments provided to the function are appended
- * to those provided to the `wrapper`. The wrapper is invoked with the `this`
- * binding of the created function.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Function
- * @param {*} value The value to wrap.
- * @param {Function} [wrapper=identity] The wrapper function.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var p = _.wrap(_.escape, function(func, text) {
- * return '<p>' + func(text) + '</p>';
- * });
- *
- * p('fred, barney, & pebbles');
- * // => '<p>fred, barney, & pebbles</p>'
- */
- function wrap(value, wrapper) {
- return partial(castFunction(wrapper), value);
- }
- /*------------------------------------------------------------------------*/
- /**
- * Casts `value` as an array if it's not one.
- *
- * @static
- * @memberOf _
- * @since 4.4.0
- * @category Lang
- * @param {*} value The value to inspect.
- * @returns {Array} Returns the cast array.
- * @example
- *
- * _.castArray(1);
- * // => [1]
- *
- * _.castArray({ 'a': 1 });
- * // => [{ 'a': 1 }]
- *
- * _.castArray('abc');
- * // => ['abc']
- *
- * _.castArray(null);
- * // => [null]
- *
- * _.castArray(undefined);
- * // => [undefined]
- *
- * _.castArray();
- * // => []
- *
- * var array = [1, 2, 3];
- * console.log(_.castArray(array) === array);
- * // => true
- */
- function castArray() {
- if (!arguments.length) {
- return [];
- }
- var value = arguments[0];
- return isArray(value) ? value : [value];
- }
- /**
- * Creates a shallow clone of `value`.
- *
- * **Note:** This method is loosely based on the
- * [structured clone algorithm](https://mdn.io/Structured_clone_algorithm)
- * and supports cloning arrays, array buffers, booleans, date objects, maps,
- * numbers, `Object` objects, regexes, sets, strings, symbols, and typed
- * arrays. The own enumerable properties of `arguments` objects are cloned
- * as plain objects. An empty object is returned for uncloneable values such
- * as error objects, functions, DOM nodes, and WeakMaps.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to clone.
- * @returns {*} Returns the cloned value.
- * @see _.cloneDeep
- * @example
- *
- * var objects = [{ 'a': 1 }, { 'b': 2 }];
- *
- * var shallow = _.clone(objects);
- * console.log(shallow[0] === objects[0]);
- * // => true
- */
- function clone(value) {
- return baseClone(value, CLONE_SYMBOLS_FLAG);
- }
- /**
- * This method is like `_.clone` except that it accepts `customizer` which
- * is invoked to produce the cloned value. If `customizer` returns `undefined`,
- * cloning is handled by the method instead. The `customizer` is invoked with
- * up to four arguments; (value [, index|key, object, stack]).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to clone.
- * @param {Function} [customizer] The function to customize cloning.
- * @returns {*} Returns the cloned value.
- * @see _.cloneDeepWith
- * @example
- *
- * function customizer(value) {
- * if (_.isElement(value)) {
- * return value.cloneNode(false);
- * }
- * }
- *
- * var el = _.cloneWith(document.body, customizer);
- *
- * console.log(el === document.body);
- * // => false
- * console.log(el.nodeName);
- * // => 'BODY'
- * console.log(el.childNodes.length);
- * // => 0
- */
- function cloneWith(value, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return baseClone(value, CLONE_SYMBOLS_FLAG, customizer);
- }
- /**
- * This method is like `_.clone` except that it recursively clones `value`.
- *
- * @static
- * @memberOf _
- * @since 1.0.0
- * @category Lang
- * @param {*} value The value to recursively clone.
- * @returns {*} Returns the deep cloned value.
- * @see _.clone
- * @example
- *
- * var objects = [{ 'a': 1 }, { 'b': 2 }];
- *
- * var deep = _.cloneDeep(objects);
- * console.log(deep[0] === objects[0]);
- * // => false
- */
- function cloneDeep(value) {
- return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG);
- }
- /**
- * This method is like `_.cloneWith` except that it recursively clones `value`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to recursively clone.
- * @param {Function} [customizer] The function to customize cloning.
- * @returns {*} Returns the deep cloned value.
- * @see _.cloneWith
- * @example
- *
- * function customizer(value) {
- * if (_.isElement(value)) {
- * return value.cloneNode(true);
- * }
- * }
- *
- * var el = _.cloneDeepWith(document.body, customizer);
- *
- * console.log(el === document.body);
- * // => false
- * console.log(el.nodeName);
- * // => 'BODY'
- * console.log(el.childNodes.length);
- * // => 20
- */
- function cloneDeepWith(value, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return baseClone(value, CLONE_DEEP_FLAG | CLONE_SYMBOLS_FLAG, customizer);
- }
- /**
- * Checks if `object` conforms to `source` by invoking the predicate
- * properties of `source` with the corresponding property values of `object`.
- *
- * **Note:** This method is equivalent to `_.conforms` when `source` is
- * partially applied.
- *
- * @static
- * @memberOf _
- * @since 4.14.0
- * @category Lang
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property predicates to conform to.
- * @returns {boolean} Returns `true` if `object` conforms, else `false`.
- * @example
- *
- * var object = { 'a': 1, 'b': 2 };
- *
- * _.conformsTo(object, { 'b': function(n) { return n > 1; } });
- * // => true
- *
- * _.conformsTo(object, { 'b': function(n) { return n > 2; } });
- * // => false
- */
- function conformsTo(object, source) {
- return source == null || baseConformsTo(object, source, keys(source));
- }
- /**
- * Performs a
- * [`SameValueZero`](http://ecma-international.org/ecma-262/7.0/#sec-samevaluezero)
- * comparison between two values to determine if they are equivalent.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * var object = { 'a': 1 };
- * var other = { 'a': 1 };
- *
- * _.eq(object, object);
- * // => true
- *
- * _.eq(object, other);
- * // => false
- *
- * _.eq('a', 'a');
- * // => true
- *
- * _.eq('a', Object('a'));
- * // => false
- *
- * _.eq(NaN, NaN);
- * // => true
- */
- function eq(value, other) {
- return value === other || (value !== value && other !== other);
- }
- /**
- * Checks if `value` is greater than `other`.
- *
- * @static
- * @memberOf _
- * @since 3.9.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than `other`,
- * else `false`.
- * @see _.lt
- * @example
- *
- * _.gt(3, 1);
- * // => true
- *
- * _.gt(3, 3);
- * // => false
- *
- * _.gt(1, 3);
- * // => false
- */
- var gt = createRelationalOperation(baseGt);
- /**
- * Checks if `value` is greater than or equal to `other`.
- *
- * @static
- * @memberOf _
- * @since 3.9.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is greater than or equal to
- * `other`, else `false`.
- * @see _.lte
- * @example
- *
- * _.gte(3, 1);
- * // => true
- *
- * _.gte(3, 3);
- * // => true
- *
- * _.gte(1, 3);
- * // => false
- */
- var gte = createRelationalOperation(function(value, other) {
- return value >= other;
- });
- /**
- * Checks if `value` is likely an `arguments` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an `arguments` object,
- * else `false`.
- * @example
- *
- * _.isArguments(function() { return arguments; }());
- * // => true
- *
- * _.isArguments([1, 2, 3]);
- * // => false
- */
- var isArguments = baseIsArguments(function() { return arguments; }()) ? baseIsArguments : function(value) {
- return isObjectLike(value) && hasOwnProperty.call(value, 'callee') &&
- !propertyIsEnumerable.call(value, 'callee');
- };
- /**
- * Checks if `value` is classified as an `Array` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array, else `false`.
- * @example
- *
- * _.isArray([1, 2, 3]);
- * // => true
- *
- * _.isArray(document.body.children);
- * // => false
- *
- * _.isArray('abc');
- * // => false
- *
- * _.isArray(_.noop);
- * // => false
- */
- var isArray = Array.isArray;
- /**
- * Checks if `value` is classified as an `ArrayBuffer` object.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array buffer, else `false`.
- * @example
- *
- * _.isArrayBuffer(new ArrayBuffer(2));
- * // => true
- *
- * _.isArrayBuffer(new Array(2));
- * // => false
- */
- var isArrayBuffer = nodeIsArrayBuffer ? baseUnary(nodeIsArrayBuffer) : baseIsArrayBuffer;
- /**
- * Checks if `value` is array-like. A value is considered array-like if it's
- * not a function and has a `value.length` that's an integer greater than or
- * equal to `0` and less than or equal to `Number.MAX_SAFE_INTEGER`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is array-like, else `false`.
- * @example
- *
- * _.isArrayLike([1, 2, 3]);
- * // => true
- *
- * _.isArrayLike(document.body.children);
- * // => true
- *
- * _.isArrayLike('abc');
- * // => true
- *
- * _.isArrayLike(_.noop);
- * // => false
- */
- function isArrayLike(value) {
- return value != null && isLength(value.length) && !isFunction(value);
- }
- /**
- * This method is like `_.isArrayLike` except that it also checks if `value`
- * is an object.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an array-like object,
- * else `false`.
- * @example
- *
- * _.isArrayLikeObject([1, 2, 3]);
- * // => true
- *
- * _.isArrayLikeObject(document.body.children);
- * // => true
- *
- * _.isArrayLikeObject('abc');
- * // => false
- *
- * _.isArrayLikeObject(_.noop);
- * // => false
- */
- function isArrayLikeObject(value) {
- return isObjectLike(value) && isArrayLike(value);
- }
- /**
- * Checks if `value` is classified as a boolean primitive or object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a boolean, else `false`.
- * @example
- *
- * _.isBoolean(false);
- * // => true
- *
- * _.isBoolean(null);
- * // => false
- */
- function isBoolean(value) {
- return value === true || value === false ||
- (isObjectLike(value) && baseGetTag(value) == boolTag);
- }
- /**
- * Checks if `value` is a buffer.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a buffer, else `false`.
- * @example
- *
- * _.isBuffer(new Buffer(2));
- * // => true
- *
- * _.isBuffer(new Uint8Array(2));
- * // => false
- */
- var isBuffer = nativeIsBuffer || stubFalse;
- /**
- * Checks if `value` is classified as a `Date` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a date object, else `false`.
- * @example
- *
- * _.isDate(new Date);
- * // => true
- *
- * _.isDate('Mon April 23 2012');
- * // => false
- */
- var isDate = nodeIsDate ? baseUnary(nodeIsDate) : baseIsDate;
- /**
- * Checks if `value` is likely a DOM element.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a DOM element, else `false`.
- * @example
- *
- * _.isElement(document.body);
- * // => true
- *
- * _.isElement('<body>');
- * // => false
- */
- function isElement(value) {
- return isObjectLike(value) && value.nodeType === 1 && !isPlainObject(value);
- }
- /**
- * Checks if `value` is an empty object, collection, map, or set.
- *
- * Objects are considered empty if they have no own enumerable string keyed
- * properties.
- *
- * Array-like values such as `arguments` objects, arrays, buffers, strings, or
- * jQuery-like collections are considered empty if they have a `length` of `0`.
- * Similarly, maps and sets are considered empty if they have a `size` of `0`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is empty, else `false`.
- * @example
- *
- * _.isEmpty(null);
- * // => true
- *
- * _.isEmpty(true);
- * // => true
- *
- * _.isEmpty(1);
- * // => true
- *
- * _.isEmpty([1, 2, 3]);
- * // => false
- *
- * _.isEmpty({ 'a': 1 });
- * // => false
- */
- function isEmpty(value) {
- if (value == null) {
- return true;
- }
- if (isArrayLike(value) &&
- (isArray(value) || typeof value == 'string' || typeof value.splice == 'function' ||
- isBuffer(value) || isTypedArray(value) || isArguments(value))) {
- return !value.length;
- }
- var tag = getTag(value);
- if (tag == mapTag || tag == setTag) {
- return !value.size;
- }
- if (isPrototype(value)) {
- return !baseKeys(value).length;
- }
- for (var key in value) {
- if (hasOwnProperty.call(value, key)) {
- return false;
- }
- }
- return true;
- }
- /**
- * Performs a deep comparison between two values to determine if they are
- * equivalent.
- *
- * **Note:** This method supports comparing arrays, array buffers, booleans,
- * date objects, error objects, maps, numbers, `Object` objects, regexes,
- * sets, strings, symbols, and typed arrays. `Object` objects are compared
- * by their own, not inherited, enumerable properties. Functions and DOM
- * nodes are compared by strict equality, i.e. `===`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * var object = { 'a': 1 };
- * var other = { 'a': 1 };
- *
- * _.isEqual(object, other);
- * // => true
- *
- * object === other;
- * // => false
- */
- function isEqual(value, other) {
- return baseIsEqual(value, other);
- }
- /**
- * This method is like `_.isEqual` except that it accepts `customizer` which
- * is invoked to compare values. If `customizer` returns `undefined`, comparisons
- * are handled by the method instead. The `customizer` is invoked with up to
- * six arguments: (objValue, othValue [, index|key, object, other, stack]).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if the values are equivalent, else `false`.
- * @example
- *
- * function isGreeting(value) {
- * return /^h(?:i|ello)$/.test(value);
- * }
- *
- * function customizer(objValue, othValue) {
- * if (isGreeting(objValue) && isGreeting(othValue)) {
- * return true;
- * }
- * }
- *
- * var array = ['hello', 'goodbye'];
- * var other = ['hi', 'goodbye'];
- *
- * _.isEqualWith(array, other, customizer);
- * // => true
- */
- function isEqualWith(value, other, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- var result = customizer ? customizer(value, other) : undefined;
- return result === undefined ? baseIsEqual(value, other, undefined, customizer) : !!result;
- }
- /**
- * Checks if `value` is an `Error`, `EvalError`, `RangeError`, `ReferenceError`,
- * `SyntaxError`, `TypeError`, or `URIError` object.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an error object, else `false`.
- * @example
- *
- * _.isError(new Error);
- * // => true
- *
- * _.isError(Error);
- * // => false
- */
- function isError(value) {
- if (!isObjectLike(value)) {
- return false;
- }
- var tag = baseGetTag(value);
- return tag == errorTag || tag == domExcTag ||
- (typeof value.message == 'string' && typeof value.name == 'string' && !isPlainObject(value));
- }
- /**
- * Checks if `value` is a finite primitive number.
- *
- * **Note:** This method is based on
- * [`Number.isFinite`](https://mdn.io/Number/isFinite).
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a finite number, else `false`.
- * @example
- *
- * _.isFinite(3);
- * // => true
- *
- * _.isFinite(Number.MIN_VALUE);
- * // => true
- *
- * _.isFinite(Infinity);
- * // => false
- *
- * _.isFinite('3');
- * // => false
- */
- function isFinite(value) {
- return typeof value == 'number' && nativeIsFinite(value);
- }
- /**
- * Checks if `value` is classified as a `Function` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a function, else `false`.
- * @example
- *
- * _.isFunction(_);
- * // => true
- *
- * _.isFunction(/abc/);
- * // => false
- */
- function isFunction(value) {
- if (!isObject(value)) {
- return false;
- }
- // The use of `Object#toString` avoids issues with the `typeof` operator
- // in Safari 9 which returns 'object' for typed arrays and other constructors.
- var tag = baseGetTag(value);
- return tag == funcTag || tag == genTag || tag == asyncTag || tag == proxyTag;
- }
- /**
- * Checks if `value` is an integer.
- *
- * **Note:** This method is based on
- * [`Number.isInteger`](https://mdn.io/Number/isInteger).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an integer, else `false`.
- * @example
- *
- * _.isInteger(3);
- * // => true
- *
- * _.isInteger(Number.MIN_VALUE);
- * // => false
- *
- * _.isInteger(Infinity);
- * // => false
- *
- * _.isInteger('3');
- * // => false
- */
- function isInteger(value) {
- return typeof value == 'number' && value == toInteger(value);
- }
- /**
- * Checks if `value` is a valid array-like length.
- *
- * **Note:** This method is loosely based on
- * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a valid length, else `false`.
- * @example
- *
- * _.isLength(3);
- * // => true
- *
- * _.isLength(Number.MIN_VALUE);
- * // => false
- *
- * _.isLength(Infinity);
- * // => false
- *
- * _.isLength('3');
- * // => false
- */
- function isLength(value) {
- return typeof value == 'number' &&
- value > -1 && value % 1 == 0 && value <= MAX_SAFE_INTEGER;
- }
- /**
- * Checks if `value` is the
- * [language type](http://www.ecma-international.org/ecma-262/7.0/#sec-ecmascript-language-types)
- * of `Object`. (e.g. arrays, functions, objects, regexes, `new Number(0)`, and `new String('')`)
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is an object, else `false`.
- * @example
- *
- * _.isObject({});
- * // => true
- *
- * _.isObject([1, 2, 3]);
- * // => true
- *
- * _.isObject(_.noop);
- * // => true
- *
- * _.isObject(null);
- * // => false
- */
- function isObject(value) {
- var type = typeof value;
- return value != null && (type == 'object' || type == 'function');
- }
- /**
- * Checks if `value` is object-like. A value is object-like if it's not `null`
- * and has a `typeof` result of "object".
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is object-like, else `false`.
- * @example
- *
- * _.isObjectLike({});
- * // => true
- *
- * _.isObjectLike([1, 2, 3]);
- * // => true
- *
- * _.isObjectLike(_.noop);
- * // => false
- *
- * _.isObjectLike(null);
- * // => false
- */
- function isObjectLike(value) {
- return value != null && typeof value == 'object';
- }
- /**
- * Checks if `value` is classified as a `Map` object.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a map, else `false`.
- * @example
- *
- * _.isMap(new Map);
- * // => true
- *
- * _.isMap(new WeakMap);
- * // => false
- */
- var isMap = nodeIsMap ? baseUnary(nodeIsMap) : baseIsMap;
- /**
- * Performs a partial deep comparison between `object` and `source` to
- * determine if `object` contains equivalent property values.
- *
- * **Note:** This method is equivalent to `_.matches` when `source` is
- * partially applied.
- *
- * Partial comparisons will match empty array and empty object `source`
- * values against any array or object value, respectively. See `_.isEqual`
- * for a list of supported value comparisons.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
- * @example
- *
- * var object = { 'a': 1, 'b': 2 };
- *
- * _.isMatch(object, { 'b': 2 });
- * // => true
- *
- * _.isMatch(object, { 'b': 1 });
- * // => false
- */
- function isMatch(object, source) {
- return object === source || baseIsMatch(object, source, getMatchData(source));
- }
- /**
- * This method is like `_.isMatch` except that it accepts `customizer` which
- * is invoked to compare values. If `customizer` returns `undefined`, comparisons
- * are handled by the method instead. The `customizer` is invoked with five
- * arguments: (objValue, srcValue, index|key, object, source).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {Object} object The object to inspect.
- * @param {Object} source The object of property values to match.
- * @param {Function} [customizer] The function to customize comparisons.
- * @returns {boolean} Returns `true` if `object` is a match, else `false`.
- * @example
- *
- * function isGreeting(value) {
- * return /^h(?:i|ello)$/.test(value);
- * }
- *
- * function customizer(objValue, srcValue) {
- * if (isGreeting(objValue) && isGreeting(srcValue)) {
- * return true;
- * }
- * }
- *
- * var object = { 'greeting': 'hello' };
- * var source = { 'greeting': 'hi' };
- *
- * _.isMatchWith(object, source, customizer);
- * // => true
- */
- function isMatchWith(object, source, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return baseIsMatch(object, source, getMatchData(source), customizer);
- }
- /**
- * Checks if `value` is `NaN`.
- *
- * **Note:** This method is based on
- * [`Number.isNaN`](https://mdn.io/Number/isNaN) and is not the same as
- * global [`isNaN`](https://mdn.io/isNaN) which returns `true` for
- * `undefined` and other non-number values.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `NaN`, else `false`.
- * @example
- *
- * _.isNaN(NaN);
- * // => true
- *
- * _.isNaN(new Number(NaN));
- * // => true
- *
- * isNaN(undefined);
- * // => true
- *
- * _.isNaN(undefined);
- * // => false
- */
- function isNaN(value) {
- // An `NaN` primitive is the only value that is not equal to itself.
- // Perform the `toStringTag` check first to avoid errors with some
- // ActiveX objects in IE.
- return isNumber(value) && value != +value;
- }
- /**
- * Checks if `value` is a pristine native function.
- *
- * **Note:** This method can't reliably detect native functions in the presence
- * of the core-js package because core-js circumvents this kind of detection.
- * Despite multiple requests, the core-js maintainer has made it clear: any
- * attempt to fix the detection will be obstructed. As a result, we're left
- * with little choice but to throw an error. Unfortunately, this also affects
- * packages, like [babel-polyfill](https://www.npmjs.com/package/babel-polyfill),
- * which rely on core-js.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a native function,
- * else `false`.
- * @example
- *
- * _.isNative(Array.prototype.push);
- * // => true
- *
- * _.isNative(_);
- * // => false
- */
- function isNative(value) {
- if (isMaskable(value)) {
- throw new Error(CORE_ERROR_TEXT);
- }
- return baseIsNative(value);
- }
- /**
- * Checks if `value` is `null`.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `null`, else `false`.
- * @example
- *
- * _.isNull(null);
- * // => true
- *
- * _.isNull(void 0);
- * // => false
- */
- function isNull(value) {
- return value === null;
- }
- /**
- * Checks if `value` is `null` or `undefined`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is nullish, else `false`.
- * @example
- *
- * _.isNil(null);
- * // => true
- *
- * _.isNil(void 0);
- * // => true
- *
- * _.isNil(NaN);
- * // => false
- */
- function isNil(value) {
- return value == null;
- }
- /**
- * Checks if `value` is classified as a `Number` primitive or object.
- *
- * **Note:** To exclude `Infinity`, `-Infinity`, and `NaN`, which are
- * classified as numbers, use the `_.isFinite` method.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a number, else `false`.
- * @example
- *
- * _.isNumber(3);
- * // => true
- *
- * _.isNumber(Number.MIN_VALUE);
- * // => true
- *
- * _.isNumber(Infinity);
- * // => true
- *
- * _.isNumber('3');
- * // => false
- */
- function isNumber(value) {
- return typeof value == 'number' ||
- (isObjectLike(value) && baseGetTag(value) == numberTag);
- }
- /**
- * Checks if `value` is a plain object, that is, an object created by the
- * `Object` constructor or one with a `[[Prototype]]` of `null`.
- *
- * @static
- * @memberOf _
- * @since 0.8.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a plain object, else `false`.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * }
- *
- * _.isPlainObject(new Foo);
- * // => false
- *
- * _.isPlainObject([1, 2, 3]);
- * // => false
- *
- * _.isPlainObject({ 'x': 0, 'y': 0 });
- * // => true
- *
- * _.isPlainObject(Object.create(null));
- * // => true
- */
- function isPlainObject(value) {
- if (!isObjectLike(value) || baseGetTag(value) != objectTag) {
- return false;
- }
- var proto = getPrototype(value);
- if (proto === null) {
- return true;
- }
- var Ctor = hasOwnProperty.call(proto, 'constructor') && proto.constructor;
- return typeof Ctor == 'function' && Ctor instanceof Ctor &&
- funcToString.call(Ctor) == objectCtorString;
- }
- /**
- * Checks if `value` is classified as a `RegExp` object.
- *
- * @static
- * @memberOf _
- * @since 0.1.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a regexp, else `false`.
- * @example
- *
- * _.isRegExp(/abc/);
- * // => true
- *
- * _.isRegExp('/abc/');
- * // => false
- */
- var isRegExp = nodeIsRegExp ? baseUnary(nodeIsRegExp) : baseIsRegExp;
- /**
- * Checks if `value` is a safe integer. An integer is safe if it's an IEEE-754
- * double precision number which isn't the result of a rounded unsafe integer.
- *
- * **Note:** This method is based on
- * [`Number.isSafeInteger`](https://mdn.io/Number/isSafeInteger).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a safe integer, else `false`.
- * @example
- *
- * _.isSafeInteger(3);
- * // => true
- *
- * _.isSafeInteger(Number.MIN_VALUE);
- * // => false
- *
- * _.isSafeInteger(Infinity);
- * // => false
- *
- * _.isSafeInteger('3');
- * // => false
- */
- function isSafeInteger(value) {
- return isInteger(value) && value >= -MAX_SAFE_INTEGER && value <= MAX_SAFE_INTEGER;
- }
- /**
- * Checks if `value` is classified as a `Set` object.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a set, else `false`.
- * @example
- *
- * _.isSet(new Set);
- * // => true
- *
- * _.isSet(new WeakSet);
- * // => false
- */
- var isSet = nodeIsSet ? baseUnary(nodeIsSet) : baseIsSet;
- /**
- * Checks if `value` is classified as a `String` primitive or object.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a string, else `false`.
- * @example
- *
- * _.isString('abc');
- * // => true
- *
- * _.isString(1);
- * // => false
- */
- function isString(value) {
- return typeof value == 'string' ||
- (!isArray(value) && isObjectLike(value) && baseGetTag(value) == stringTag);
- }
- /**
- * Checks if `value` is classified as a `Symbol` primitive or object.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a symbol, else `false`.
- * @example
- *
- * _.isSymbol(Symbol.iterator);
- * // => true
- *
- * _.isSymbol('abc');
- * // => false
- */
- function isSymbol(value) {
- return typeof value == 'symbol' ||
- (isObjectLike(value) && baseGetTag(value) == symbolTag);
- }
- /**
- * Checks if `value` is classified as a typed array.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a typed array, else `false`.
- * @example
- *
- * _.isTypedArray(new Uint8Array);
- * // => true
- *
- * _.isTypedArray([]);
- * // => false
- */
- var isTypedArray = nodeIsTypedArray ? baseUnary(nodeIsTypedArray) : baseIsTypedArray;
- /**
- * Checks if `value` is `undefined`.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is `undefined`, else `false`.
- * @example
- *
- * _.isUndefined(void 0);
- * // => true
- *
- * _.isUndefined(null);
- * // => false
- */
- function isUndefined(value) {
- return value === undefined;
- }
- /**
- * Checks if `value` is classified as a `WeakMap` object.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a weak map, else `false`.
- * @example
- *
- * _.isWeakMap(new WeakMap);
- * // => true
- *
- * _.isWeakMap(new Map);
- * // => false
- */
- function isWeakMap(value) {
- return isObjectLike(value) && getTag(value) == weakMapTag;
- }
- /**
- * Checks if `value` is classified as a `WeakSet` object.
- *
- * @static
- * @memberOf _
- * @since 4.3.0
- * @category Lang
- * @param {*} value The value to check.
- * @returns {boolean} Returns `true` if `value` is a weak set, else `false`.
- * @example
- *
- * _.isWeakSet(new WeakSet);
- * // => true
- *
- * _.isWeakSet(new Set);
- * // => false
- */
- function isWeakSet(value) {
- return isObjectLike(value) && baseGetTag(value) == weakSetTag;
- }
- /**
- * Checks if `value` is less than `other`.
- *
- * @static
- * @memberOf _
- * @since 3.9.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than `other`,
- * else `false`.
- * @see _.gt
- * @example
- *
- * _.lt(1, 3);
- * // => true
- *
- * _.lt(3, 3);
- * // => false
- *
- * _.lt(3, 1);
- * // => false
- */
- var lt = createRelationalOperation(baseLt);
- /**
- * Checks if `value` is less than or equal to `other`.
- *
- * @static
- * @memberOf _
- * @since 3.9.0
- * @category Lang
- * @param {*} value The value to compare.
- * @param {*} other The other value to compare.
- * @returns {boolean} Returns `true` if `value` is less than or equal to
- * `other`, else `false`.
- * @see _.gte
- * @example
- *
- * _.lte(1, 3);
- * // => true
- *
- * _.lte(3, 3);
- * // => true
- *
- * _.lte(3, 1);
- * // => false
- */
- var lte = createRelationalOperation(function(value, other) {
- return value <= other;
- });
- /**
- * Converts `value` to an array.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {Array} Returns the converted array.
- * @example
- *
- * _.toArray({ 'a': 1, 'b': 2 });
- * // => [1, 2]
- *
- * _.toArray('abc');
- * // => ['a', 'b', 'c']
- *
- * _.toArray(1);
- * // => []
- *
- * _.toArray(null);
- * // => []
- */
- function toArray(value) {
- if (!value) {
- return [];
- }
- if (isArrayLike(value)) {
- return isString(value) ? stringToArray(value) : copyArray(value);
- }
- if (symIterator && value[symIterator]) {
- return iteratorToArray(value[symIterator]());
- }
- var tag = getTag(value),
- func = tag == mapTag ? mapToArray : (tag == setTag ? setToArray : values);
- return func(value);
- }
- /**
- * Converts `value` to a finite number.
- *
- * @static
- * @memberOf _
- * @since 4.12.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted number.
- * @example
- *
- * _.toFinite(3.2);
- * // => 3.2
- *
- * _.toFinite(Number.MIN_VALUE);
- * // => 5e-324
- *
- * _.toFinite(Infinity);
- * // => 1.7976931348623157e+308
- *
- * _.toFinite('3.2');
- * // => 3.2
- */
- function toFinite(value) {
- if (!value) {
- return value === 0 ? value : 0;
- }
- value = toNumber(value);
- if (value === INFINITY || value === -INFINITY) {
- var sign = (value < 0 ? -1 : 1);
- return sign * MAX_INTEGER;
- }
- return value === value ? value : 0;
- }
- /**
- * Converts `value` to an integer.
- *
- * **Note:** This method is loosely based on
- * [`ToInteger`](http://www.ecma-international.org/ecma-262/7.0/#sec-tointeger).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
- * @example
- *
- * _.toInteger(3.2);
- * // => 3
- *
- * _.toInteger(Number.MIN_VALUE);
- * // => 0
- *
- * _.toInteger(Infinity);
- * // => 1.7976931348623157e+308
- *
- * _.toInteger('3.2');
- * // => 3
- */
- function toInteger(value) {
- var result = toFinite(value),
- remainder = result % 1;
- return result === result ? (remainder ? result - remainder : result) : 0;
- }
- /**
- * Converts `value` to an integer suitable for use as the length of an
- * array-like object.
- *
- * **Note:** This method is based on
- * [`ToLength`](http://ecma-international.org/ecma-262/7.0/#sec-tolength).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
- * @example
- *
- * _.toLength(3.2);
- * // => 3
- *
- * _.toLength(Number.MIN_VALUE);
- * // => 0
- *
- * _.toLength(Infinity);
- * // => 4294967295
- *
- * _.toLength('3.2');
- * // => 3
- */
- function toLength(value) {
- return value ? baseClamp(toInteger(value), 0, MAX_ARRAY_LENGTH) : 0;
- }
- /**
- * Converts `value` to a number.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to process.
- * @returns {number} Returns the number.
- * @example
- *
- * _.toNumber(3.2);
- * // => 3.2
- *
- * _.toNumber(Number.MIN_VALUE);
- * // => 5e-324
- *
- * _.toNumber(Infinity);
- * // => Infinity
- *
- * _.toNumber('3.2');
- * // => 3.2
- */
- function toNumber(value) {
- if (typeof value == 'number') {
- return value;
- }
- if (isSymbol(value)) {
- return NAN;
- }
- if (isObject(value)) {
- var other = typeof value.valueOf == 'function' ? value.valueOf() : value;
- value = isObject(other) ? (other + '') : other;
- }
- if (typeof value != 'string') {
- return value === 0 ? value : +value;
- }
- value = value.replace(reTrim, '');
- var isBinary = reIsBinary.test(value);
- return (isBinary || reIsOctal.test(value))
- ? freeParseInt(value.slice(2), isBinary ? 2 : 8)
- : (reIsBadHex.test(value) ? NAN : +value);
- }
- /**
- * Converts `value` to a plain object flattening inherited enumerable string
- * keyed properties of `value` to own properties of the plain object.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {Object} Returns the converted plain object.
- * @example
- *
- * function Foo() {
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.assign({ 'a': 1 }, new Foo);
- * // => { 'a': 1, 'b': 2 }
- *
- * _.assign({ 'a': 1 }, _.toPlainObject(new Foo));
- * // => { 'a': 1, 'b': 2, 'c': 3 }
- */
- function toPlainObject(value) {
- return copyObject(value, keysIn(value));
- }
- /**
- * Converts `value` to a safe integer. A safe integer can be compared and
- * represented correctly.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {number} Returns the converted integer.
- * @example
- *
- * _.toSafeInteger(3.2);
- * // => 3
- *
- * _.toSafeInteger(Number.MIN_VALUE);
- * // => 0
- *
- * _.toSafeInteger(Infinity);
- * // => 9007199254740991
- *
- * _.toSafeInteger('3.2');
- * // => 3
- */
- function toSafeInteger(value) {
- return value
- ? baseClamp(toInteger(value), -MAX_SAFE_INTEGER, MAX_SAFE_INTEGER)
- : (value === 0 ? value : 0);
- }
- /**
- * Converts `value` to a string. An empty string is returned for `null`
- * and `undefined` values. The sign of `-0` is preserved.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Lang
- * @param {*} value The value to convert.
- * @returns {string} Returns the converted string.
- * @example
- *
- * _.toString(null);
- * // => ''
- *
- * _.toString(-0);
- * // => '-0'
- *
- * _.toString([1, 2, 3]);
- * // => '1,2,3'
- */
- function toString(value) {
- return value == null ? '' : baseToString(value);
- }
- /*------------------------------------------------------------------------*/
- /**
- * Assigns own enumerable string keyed properties of source objects to the
- * destination object. Source objects are applied from left to right.
- * Subsequent sources overwrite property assignments of previous sources.
- *
- * **Note:** This method mutates `object` and is loosely based on
- * [`Object.assign`](https://mdn.io/Object/assign).
- *
- * @static
- * @memberOf _
- * @since 0.10.0
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @see _.assignIn
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * }
- *
- * function Bar() {
- * this.c = 3;
- * }
- *
- * Foo.prototype.b = 2;
- * Bar.prototype.d = 4;
- *
- * _.assign({ 'a': 0 }, new Foo, new Bar);
- * // => { 'a': 1, 'c': 3 }
- */
- var assign = createAssigner(function(object, source) {
- if (isPrototype(source) || isArrayLike(source)) {
- copyObject(source, keys(source), object);
- return;
- }
- for (var key in source) {
- if (hasOwnProperty.call(source, key)) {
- assignValue(object, key, source[key]);
- }
- }
- });
- /**
- * This method is like `_.assign` except that it iterates over own and
- * inherited source properties.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @alias extend
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @see _.assign
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * }
- *
- * function Bar() {
- * this.c = 3;
- * }
- *
- * Foo.prototype.b = 2;
- * Bar.prototype.d = 4;
- *
- * _.assignIn({ 'a': 0 }, new Foo, new Bar);
- * // => { 'a': 1, 'b': 2, 'c': 3, 'd': 4 }
- */
- var assignIn = createAssigner(function(object, source) {
- copyObject(source, keysIn(source), object);
- });
- /**
- * This method is like `_.assignIn` except that it accepts `customizer`
- * which is invoked to produce the assigned values. If `customizer` returns
- * `undefined`, assignment is handled by the method instead. The `customizer`
- * is invoked with five arguments: (objValue, srcValue, key, object, source).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @alias extendWith
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @see _.assignWith
- * @example
- *
- * function customizer(objValue, srcValue) {
- * return _.isUndefined(objValue) ? srcValue : objValue;
- * }
- *
- * var defaults = _.partialRight(_.assignInWith, customizer);
- *
- * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
- */
- var assignInWith = createAssigner(function(object, source, srcIndex, customizer) {
- copyObject(source, keysIn(source), object, customizer);
- });
- /**
- * This method is like `_.assign` except that it accepts `customizer`
- * which is invoked to produce the assigned values. If `customizer` returns
- * `undefined`, assignment is handled by the method instead. The `customizer`
- * is invoked with five arguments: (objValue, srcValue, key, object, source).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @see _.assignInWith
- * @example
- *
- * function customizer(objValue, srcValue) {
- * return _.isUndefined(objValue) ? srcValue : objValue;
- * }
- *
- * var defaults = _.partialRight(_.assignWith, customizer);
- *
- * defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
- */
- var assignWith = createAssigner(function(object, source, srcIndex, customizer) {
- copyObject(source, keys(source), object, customizer);
- });
- /**
- * Creates an array of values corresponding to `paths` of `object`.
- *
- * @static
- * @memberOf _
- * @since 1.0.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {...(string|string[])} [paths] The property paths to pick.
- * @returns {Array} Returns the picked values.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }, 4] };
- *
- * _.at(object, ['a[0].b.c', 'a[1]']);
- * // => [3, 4]
- */
- var at = flatRest(baseAt);
- /**
- * Creates an object that inherits from the `prototype` object. If a
- * `properties` object is given, its own enumerable string keyed properties
- * are assigned to the created object.
- *
- * @static
- * @memberOf _
- * @since 2.3.0
- * @category Object
- * @param {Object} prototype The object to inherit from.
- * @param {Object} [properties] The properties to assign to the object.
- * @returns {Object} Returns the new object.
- * @example
- *
- * function Shape() {
- * this.x = 0;
- * this.y = 0;
- * }
- *
- * function Circle() {
- * Shape.call(this);
- * }
- *
- * Circle.prototype = _.create(Shape.prototype, {
- * 'constructor': Circle
- * });
- *
- * var circle = new Circle;
- * circle instanceof Circle;
- * // => true
- *
- * circle instanceof Shape;
- * // => true
- */
- function create(prototype, properties) {
- var result = baseCreate(prototype);
- return properties == null ? result : baseAssign(result, properties);
- }
- /**
- * Assigns own and inherited enumerable string keyed properties of source
- * objects to the destination object for all destination properties that
- * resolve to `undefined`. Source objects are applied from left to right.
- * Once a property is set, additional values of the same property are ignored.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @see _.defaultsDeep
- * @example
- *
- * _.defaults({ 'a': 1 }, { 'b': 2 }, { 'a': 3 });
- * // => { 'a': 1, 'b': 2 }
- */
- var defaults = baseRest(function(object, sources) {
- object = Object(object);
- var index = -1;
- var length = sources.length;
- var guard = length > 2 ? sources[2] : undefined;
- if (guard && isIterateeCall(sources[0], sources[1], guard)) {
- length = 1;
- }
- while (++index < length) {
- var source = sources[index];
- var props = keysIn(source);
- var propsIndex = -1;
- var propsLength = props.length;
- while (++propsIndex < propsLength) {
- var key = props[propsIndex];
- var value = object[key];
- if (value === undefined ||
- (eq(value, objectProto[key]) && !hasOwnProperty.call(object, key))) {
- object[key] = source[key];
- }
- }
- }
- return object;
- });
- /**
- * This method is like `_.defaults` except that it recursively assigns
- * default properties.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 3.10.0
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @see _.defaults
- * @example
- *
- * _.defaultsDeep({ 'a': { 'b': 2 } }, { 'a': { 'b': 1, 'c': 3 } });
- * // => { 'a': { 'b': 2, 'c': 3 } }
- */
- var defaultsDeep = baseRest(function(args) {
- args.push(undefined, customDefaultsMerge);
- return apply(mergeWith, undefined, args);
- });
- /**
- * This method is like `_.find` except that it returns the key of the first
- * element `predicate` returns truthy for instead of the element itself.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category Object
- * @param {Object} object The object to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {string|undefined} Returns the key of the matched element,
- * else `undefined`.
- * @example
- *
- * var users = {
- * 'barney': { 'age': 36, 'active': true },
- * 'fred': { 'age': 40, 'active': false },
- * 'pebbles': { 'age': 1, 'active': true }
- * };
- *
- * _.findKey(users, function(o) { return o.age < 40; });
- * // => 'barney' (iteration order is not guaranteed)
- *
- * // The `_.matches` iteratee shorthand.
- * _.findKey(users, { 'age': 1, 'active': true });
- * // => 'pebbles'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findKey(users, ['active', false]);
- * // => 'fred'
- *
- * // The `_.property` iteratee shorthand.
- * _.findKey(users, 'active');
- * // => 'barney'
- */
- function findKey(object, predicate) {
- return baseFindKey(object, getIteratee(predicate, 3), baseForOwn);
- }
- /**
- * This method is like `_.findKey` except that it iterates over elements of
- * a collection in the opposite order.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Object
- * @param {Object} object The object to inspect.
- * @param {Function} [predicate=_.identity] The function invoked per iteration.
- * @returns {string|undefined} Returns the key of the matched element,
- * else `undefined`.
- * @example
- *
- * var users = {
- * 'barney': { 'age': 36, 'active': true },
- * 'fred': { 'age': 40, 'active': false },
- * 'pebbles': { 'age': 1, 'active': true }
- * };
- *
- * _.findLastKey(users, function(o) { return o.age < 40; });
- * // => returns 'pebbles' assuming `_.findKey` returns 'barney'
- *
- * // The `_.matches` iteratee shorthand.
- * _.findLastKey(users, { 'age': 36, 'active': true });
- * // => 'barney'
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.findLastKey(users, ['active', false]);
- * // => 'fred'
- *
- * // The `_.property` iteratee shorthand.
- * _.findLastKey(users, 'active');
- * // => 'pebbles'
- */
- function findLastKey(object, predicate) {
- return baseFindKey(object, getIteratee(predicate, 3), baseForOwnRight);
- }
- /**
- * Iterates over own and inherited enumerable string keyed properties of an
- * object and invokes `iteratee` for each property. The iteratee is invoked
- * with three arguments: (value, key, object). Iteratee functions may exit
- * iteration early by explicitly returning `false`.
- *
- * @static
- * @memberOf _
- * @since 0.3.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see _.forInRight
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.forIn(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'a', 'b', then 'c' (iteration order is not guaranteed).
- */
- function forIn(object, iteratee) {
- return object == null
- ? object
- : baseFor(object, getIteratee(iteratee, 3), keysIn);
- }
- /**
- * This method is like `_.forIn` except that it iterates over properties of
- * `object` in the opposite order.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see _.forIn
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.forInRight(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'c', 'b', then 'a' assuming `_.forIn` logs 'a', 'b', then 'c'.
- */
- function forInRight(object, iteratee) {
- return object == null
- ? object
- : baseForRight(object, getIteratee(iteratee, 3), keysIn);
- }
- /**
- * Iterates over own enumerable string keyed properties of an object and
- * invokes `iteratee` for each property. The iteratee is invoked with three
- * arguments: (value, key, object). Iteratee functions may exit iteration
- * early by explicitly returning `false`.
- *
- * @static
- * @memberOf _
- * @since 0.3.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see _.forOwnRight
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.forOwn(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'a' then 'b' (iteration order is not guaranteed).
- */
- function forOwn(object, iteratee) {
- return object && baseForOwn(object, getIteratee(iteratee, 3));
- }
- /**
- * This method is like `_.forOwn` except that it iterates over properties of
- * `object` in the opposite order.
- *
- * @static
- * @memberOf _
- * @since 2.0.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns `object`.
- * @see _.forOwn
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.forOwnRight(new Foo, function(value, key) {
- * console.log(key);
- * });
- * // => Logs 'b' then 'a' assuming `_.forOwn` logs 'a' then 'b'.
- */
- function forOwnRight(object, iteratee) {
- return object && baseForOwnRight(object, getIteratee(iteratee, 3));
- }
- /**
- * Creates an array of function property names from own enumerable properties
- * of `object`.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to inspect.
- * @returns {Array} Returns the function names.
- * @see _.functionsIn
- * @example
- *
- * function Foo() {
- * this.a = _.constant('a');
- * this.b = _.constant('b');
- * }
- *
- * Foo.prototype.c = _.constant('c');
- *
- * _.functions(new Foo);
- * // => ['a', 'b']
- */
- function functions(object) {
- return object == null ? [] : baseFunctions(object, keys(object));
- }
- /**
- * Creates an array of function property names from own and inherited
- * enumerable properties of `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to inspect.
- * @returns {Array} Returns the function names.
- * @see _.functions
- * @example
- *
- * function Foo() {
- * this.a = _.constant('a');
- * this.b = _.constant('b');
- * }
- *
- * Foo.prototype.c = _.constant('c');
- *
- * _.functionsIn(new Foo);
- * // => ['a', 'b', 'c']
- */
- function functionsIn(object) {
- return object == null ? [] : baseFunctions(object, keysIn(object));
- }
- /**
- * Gets the value at `path` of `object`. If the resolved value is
- * `undefined`, the `defaultValue` is returned in its place.
- *
- * @static
- * @memberOf _
- * @since 3.7.0
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to get.
- * @param {*} [defaultValue] The value returned for `undefined` resolved values.
- * @returns {*} Returns the resolved value.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
- *
- * _.get(object, 'a[0].b.c');
- * // => 3
- *
- * _.get(object, ['a', '0', 'b', 'c']);
- * // => 3
- *
- * _.get(object, 'a.b.c', 'default');
- * // => 'default'
- */
- function get(object, path, defaultValue) {
- var result = object == null ? undefined : baseGet(object, path);
- return result === undefined ? defaultValue : result;
- }
- /**
- * Checks if `path` is a direct property of `object`.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
- * @example
- *
- * var object = { 'a': { 'b': 2 } };
- * var other = _.create({ 'a': _.create({ 'b': 2 }) });
- *
- * _.has(object, 'a');
- * // => true
- *
- * _.has(object, 'a.b');
- * // => true
- *
- * _.has(object, ['a', 'b']);
- * // => true
- *
- * _.has(other, 'a');
- * // => false
- */
- function has(object, path) {
- return object != null && hasPath(object, path, baseHas);
- }
- /**
- * Checks if `path` is a direct or inherited property of `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path to check.
- * @returns {boolean} Returns `true` if `path` exists, else `false`.
- * @example
- *
- * var object = _.create({ 'a': _.create({ 'b': 2 }) });
- *
- * _.hasIn(object, 'a');
- * // => true
- *
- * _.hasIn(object, 'a.b');
- * // => true
- *
- * _.hasIn(object, ['a', 'b']);
- * // => true
- *
- * _.hasIn(object, 'b');
- * // => false
- */
- function hasIn(object, path) {
- return object != null && hasPath(object, path, baseHasIn);
- }
- /**
- * Creates an object composed of the inverted keys and values of `object`.
- * If `object` contains duplicate values, subsequent values overwrite
- * property assignments of previous values.
- *
- * @static
- * @memberOf _
- * @since 0.7.0
- * @category Object
- * @param {Object} object The object to invert.
- * @returns {Object} Returns the new inverted object.
- * @example
- *
- * var object = { 'a': 1, 'b': 2, 'c': 1 };
- *
- * _.invert(object);
- * // => { '1': 'c', '2': 'b' }
- */
- var invert = createInverter(function(result, value, key) {
- if (value != null &&
- typeof value.toString != 'function') {
- value = nativeObjectToString.call(value);
- }
- result[value] = key;
- }, constant(identity));
- /**
- * This method is like `_.invert` except that the inverted object is generated
- * from the results of running each element of `object` thru `iteratee`. The
- * corresponding inverted value of each inverted key is an array of keys
- * responsible for generating the inverted value. The iteratee is invoked
- * with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.1.0
- * @category Object
- * @param {Object} object The object to invert.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {Object} Returns the new inverted object.
- * @example
- *
- * var object = { 'a': 1, 'b': 2, 'c': 1 };
- *
- * _.invertBy(object);
- * // => { '1': ['a', 'c'], '2': ['b'] }
- *
- * _.invertBy(object, function(value) {
- * return 'group' + value;
- * });
- * // => { 'group1': ['a', 'c'], 'group2': ['b'] }
- */
- var invertBy = createInverter(function(result, value, key) {
- if (value != null &&
- typeof value.toString != 'function') {
- value = nativeObjectToString.call(value);
- }
- if (hasOwnProperty.call(result, value)) {
- result[value].push(key);
- } else {
- result[value] = [key];
- }
- }, getIteratee);
- /**
- * Invokes the method at `path` of `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the method to invoke.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {*} Returns the result of the invoked method.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': [1, 2, 3, 4] } }] };
- *
- * _.invoke(object, 'a[0].b.c.slice', 1, 3);
- * // => [2, 3]
- */
- var invoke = baseRest(baseInvoke);
- /**
- * Creates an array of the own enumerable property names of `object`.
- *
- * **Note:** Non-object values are coerced to objects. See the
- * [ES spec](http://ecma-international.org/ecma-262/7.0/#sec-object.keys)
- * for more details.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.keys(new Foo);
- * // => ['a', 'b'] (iteration order is not guaranteed)
- *
- * _.keys('hi');
- * // => ['0', '1']
- */
- function keys(object) {
- return isArrayLike(object) ? arrayLikeKeys(object) : baseKeys(object);
- }
- /**
- * Creates an array of the own and inherited enumerable property names of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property names.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.keysIn(new Foo);
- * // => ['a', 'b', 'c'] (iteration order is not guaranteed)
- */
- function keysIn(object) {
- return isArrayLike(object) ? arrayLikeKeys(object, true) : baseKeysIn(object);
- }
- /**
- * The opposite of `_.mapValues`; this method creates an object with the
- * same values as `object` and keys generated by running each own enumerable
- * string keyed property of `object` thru `iteratee`. The iteratee is invoked
- * with three arguments: (value, key, object).
- *
- * @static
- * @memberOf _
- * @since 3.8.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns the new mapped object.
- * @see _.mapValues
- * @example
- *
- * _.mapKeys({ 'a': 1, 'b': 2 }, function(value, key) {
- * return key + value;
- * });
- * // => { 'a1': 1, 'b2': 2 }
- */
- function mapKeys(object, iteratee) {
- var result = {};
- iteratee = getIteratee(iteratee, 3);
- baseForOwn(object, function(value, key, object) {
- baseAssignValue(result, iteratee(value, key, object), value);
- });
- return result;
- }
- /**
- * Creates an object with the same keys as `object` and values generated
- * by running each own enumerable string keyed property of `object` thru
- * `iteratee`. The iteratee is invoked with three arguments:
- * (value, key, object).
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Object} Returns the new mapped object.
- * @see _.mapKeys
- * @example
- *
- * var users = {
- * 'fred': { 'user': 'fred', 'age': 40 },
- * 'pebbles': { 'user': 'pebbles', 'age': 1 }
- * };
- *
- * _.mapValues(users, function(o) { return o.age; });
- * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
- *
- * // The `_.property` iteratee shorthand.
- * _.mapValues(users, 'age');
- * // => { 'fred': 40, 'pebbles': 1 } (iteration order is not guaranteed)
- */
- function mapValues(object, iteratee) {
- var result = {};
- iteratee = getIteratee(iteratee, 3);
- baseForOwn(object, function(value, key, object) {
- baseAssignValue(result, key, iteratee(value, key, object));
- });
- return result;
- }
- /**
- * This method is like `_.assign` except that it recursively merges own and
- * inherited enumerable string keyed properties of source objects into the
- * destination object. Source properties that resolve to `undefined` are
- * skipped if a destination value exists. Array and plain object properties
- * are merged recursively. Other objects and value types are overridden by
- * assignment. Source objects are applied from left to right. Subsequent
- * sources overwrite property assignments of previous sources.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 0.5.0
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} [sources] The source objects.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var object = {
- * 'a': [{ 'b': 2 }, { 'd': 4 }]
- * };
- *
- * var other = {
- * 'a': [{ 'c': 3 }, { 'e': 5 }]
- * };
- *
- * _.merge(object, other);
- * // => { 'a': [{ 'b': 2, 'c': 3 }, { 'd': 4, 'e': 5 }] }
- */
- var merge = createAssigner(function(object, source, srcIndex) {
- baseMerge(object, source, srcIndex);
- });
- /**
- * This method is like `_.merge` except that it accepts `customizer` which
- * is invoked to produce the merged values of the destination and source
- * properties. If `customizer` returns `undefined`, merging is handled by the
- * method instead. The `customizer` is invoked with six arguments:
- * (objValue, srcValue, key, object, source, stack).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The destination object.
- * @param {...Object} sources The source objects.
- * @param {Function} customizer The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @example
- *
- * function customizer(objValue, srcValue) {
- * if (_.isArray(objValue)) {
- * return objValue.concat(srcValue);
- * }
- * }
- *
- * var object = { 'a': [1], 'b': [2] };
- * var other = { 'a': [3], 'b': [4] };
- *
- * _.mergeWith(object, other, customizer);
- * // => { 'a': [1, 3], 'b': [2, 4] }
- */
- var mergeWith = createAssigner(function(object, source, srcIndex, customizer) {
- baseMerge(object, source, srcIndex, customizer);
- });
- /**
- * The opposite of `_.pick`; this method creates an object composed of the
- * own and inherited enumerable property paths of `object` that are not omitted.
- *
- * **Note:** This method is considerably slower than `_.pick`.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {...(string|string[])} [paths] The property paths to omit.
- * @returns {Object} Returns the new object.
- * @example
- *
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.omit(object, ['a', 'c']);
- * // => { 'b': '2' }
- */
- var omit = flatRest(function(object, paths) {
- var result = {};
- if (object == null) {
- return result;
- }
- var isDeep = false;
- paths = arrayMap(paths, function(path) {
- path = castPath(path, object);
- isDeep || (isDeep = path.length > 1);
- return path;
- });
- copyObject(object, getAllKeysIn(object), result);
- if (isDeep) {
- result = baseClone(result, CLONE_DEEP_FLAG | CLONE_FLAT_FLAG | CLONE_SYMBOLS_FLAG, customOmitClone);
- }
- var length = paths.length;
- while (length--) {
- baseUnset(result, paths[length]);
- }
- return result;
- });
- /**
- * The opposite of `_.pickBy`; this method creates an object composed of
- * the own and inherited enumerable string keyed properties of `object` that
- * `predicate` doesn't return truthy for. The predicate is invoked with two
- * arguments: (value, key).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The source object.
- * @param {Function} [predicate=_.identity] The function invoked per property.
- * @returns {Object} Returns the new object.
- * @example
- *
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.omitBy(object, _.isNumber);
- * // => { 'b': '2' }
- */
- function omitBy(object, predicate) {
- return pickBy(object, negate(getIteratee(predicate)));
- }
- /**
- * Creates an object composed of the picked `object` properties.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The source object.
- * @param {...(string|string[])} [paths] The property paths to pick.
- * @returns {Object} Returns the new object.
- * @example
- *
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.pick(object, ['a', 'c']);
- * // => { 'a': 1, 'c': 3 }
- */
- var pick = flatRest(function(object, paths) {
- return object == null ? {} : basePick(object, paths);
- });
- /**
- * Creates an object composed of the `object` properties `predicate` returns
- * truthy for. The predicate is invoked with two arguments: (value, key).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The source object.
- * @param {Function} [predicate=_.identity] The function invoked per property.
- * @returns {Object} Returns the new object.
- * @example
- *
- * var object = { 'a': 1, 'b': '2', 'c': 3 };
- *
- * _.pickBy(object, _.isNumber);
- * // => { 'a': 1, 'c': 3 }
- */
- function pickBy(object, predicate) {
- if (object == null) {
- return {};
- }
- var props = arrayMap(getAllKeysIn(object), function(prop) {
- return [prop];
- });
- predicate = getIteratee(predicate);
- return basePickBy(object, props, function(value, path) {
- return predicate(value, path[0]);
- });
- }
- /**
- * This method is like `_.get` except that if the resolved value is a
- * function it's invoked with the `this` binding of its parent object and
- * its result is returned.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @param {Array|string} path The path of the property to resolve.
- * @param {*} [defaultValue] The value returned for `undefined` resolved values.
- * @returns {*} Returns the resolved value.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c1': 3, 'c2': _.constant(4) } }] };
- *
- * _.result(object, 'a[0].b.c1');
- * // => 3
- *
- * _.result(object, 'a[0].b.c2');
- * // => 4
- *
- * _.result(object, 'a[0].b.c3', 'default');
- * // => 'default'
- *
- * _.result(object, 'a[0].b.c3', _.constant('default'));
- * // => 'default'
- */
- function result(object, path, defaultValue) {
- path = castPath(path, object);
- var index = -1,
- length = path.length;
- // Ensure the loop is entered when path is empty.
- if (!length) {
- length = 1;
- object = undefined;
- }
- while (++index < length) {
- var value = object == null ? undefined : object[toKey(path[index])];
- if (value === undefined) {
- index = length;
- value = defaultValue;
- }
- object = isFunction(value) ? value.call(object) : value;
- }
- return object;
- }
- /**
- * Sets the value at `path` of `object`. If a portion of `path` doesn't exist,
- * it's created. Arrays are created for missing index properties while objects
- * are created for all other missing properties. Use `_.setWith` to customize
- * `path` creation.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 3.7.0
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
- *
- * _.set(object, 'a[0].b.c', 4);
- * console.log(object.a[0].b.c);
- * // => 4
- *
- * _.set(object, ['x', '0', 'y', 'z'], 5);
- * console.log(object.x[0].y.z);
- * // => 5
- */
- function set(object, path, value) {
- return object == null ? object : baseSet(object, path, value);
- }
- /**
- * This method is like `_.set` except that it accepts `customizer` which is
- * invoked to produce the objects of `path`. If `customizer` returns `undefined`
- * path creation is handled by the method instead. The `customizer` is invoked
- * with three arguments: (nsValue, key, nsObject).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {*} value The value to set.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var object = {};
- *
- * _.setWith(object, '[0][1]', 'a', Object);
- * // => { '0': { '1': 'a' } }
- */
- function setWith(object, path, value, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return object == null ? object : baseSet(object, path, value, customizer);
- }
- /**
- * Creates an array of own enumerable string keyed-value pairs for `object`
- * which can be consumed by `_.fromPairs`. If `object` is a map or set, its
- * entries are returned.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @alias entries
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the key-value pairs.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.toPairs(new Foo);
- * // => [['a', 1], ['b', 2]] (iteration order is not guaranteed)
- */
- var toPairs = createToPairs(keys);
- /**
- * Creates an array of own and inherited enumerable string keyed-value pairs
- * for `object` which can be consumed by `_.fromPairs`. If `object` is a map
- * or set, its entries are returned.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @alias entriesIn
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the key-value pairs.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.toPairsIn(new Foo);
- * // => [['a', 1], ['b', 2], ['c', 3]] (iteration order is not guaranteed)
- */
- var toPairsIn = createToPairs(keysIn);
- /**
- * An alternative to `_.reduce`; this method transforms `object` to a new
- * `accumulator` object which is the result of running each of its own
- * enumerable string keyed properties thru `iteratee`, with each invocation
- * potentially mutating the `accumulator` object. If `accumulator` is not
- * provided, a new object with the same `[[Prototype]]` will be used. The
- * iteratee is invoked with four arguments: (accumulator, value, key, object).
- * Iteratee functions may exit iteration early by explicitly returning `false`.
- *
- * @static
- * @memberOf _
- * @since 1.3.0
- * @category Object
- * @param {Object} object The object to iterate over.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @param {*} [accumulator] The custom accumulator value.
- * @returns {*} Returns the accumulated value.
- * @example
- *
- * _.transform([2, 3, 4], function(result, n) {
- * result.push(n *= n);
- * return n % 2 == 0;
- * }, []);
- * // => [4, 9]
- *
- * _.transform({ 'a': 1, 'b': 2, 'c': 1 }, function(result, value, key) {
- * (result[value] || (result[value] = [])).push(key);
- * }, {});
- * // => { '1': ['a', 'c'], '2': ['b'] }
- */
- function transform(object, iteratee, accumulator) {
- var isArr = isArray(object),
- isArrLike = isArr || isBuffer(object) || isTypedArray(object);
- iteratee = getIteratee(iteratee, 4);
- if (accumulator == null) {
- var Ctor = object && object.constructor;
- if (isArrLike) {
- accumulator = isArr ? new Ctor : [];
- }
- else if (isObject(object)) {
- accumulator = isFunction(Ctor) ? baseCreate(getPrototype(object)) : {};
- }
- else {
- accumulator = {};
- }
- }
- (isArrLike ? arrayEach : baseForOwn)(object, function(value, index, object) {
- return iteratee(accumulator, value, index, object);
- });
- return accumulator;
- }
- /**
- * Removes the property at `path` of `object`.
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to unset.
- * @returns {boolean} Returns `true` if the property is deleted, else `false`.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 7 } }] };
- * _.unset(object, 'a[0].b.c');
- * // => true
- *
- * console.log(object);
- * // => { 'a': [{ 'b': {} }] };
- *
- * _.unset(object, ['a', '0', 'b', 'c']);
- * // => true
- *
- * console.log(object);
- * // => { 'a': [{ 'b': {} }] };
- */
- function unset(object, path) {
- return object == null ? true : baseUnset(object, path);
- }
- /**
- * This method is like `_.set` except that accepts `updater` to produce the
- * value to set. Use `_.updateWith` to customize `path` creation. The `updater`
- * is invoked with one argument: (value).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.6.0
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {Function} updater The function to produce the updated value.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var object = { 'a': [{ 'b': { 'c': 3 } }] };
- *
- * _.update(object, 'a[0].b.c', function(n) { return n * n; });
- * console.log(object.a[0].b.c);
- * // => 9
- *
- * _.update(object, 'x[0].y.z', function(n) { return n ? n + 1 : 0; });
- * console.log(object.x[0].y.z);
- * // => 0
- */
- function update(object, path, updater) {
- return object == null ? object : baseUpdate(object, path, castFunction(updater));
- }
- /**
- * This method is like `_.update` except that it accepts `customizer` which is
- * invoked to produce the objects of `path`. If `customizer` returns `undefined`
- * path creation is handled by the method instead. The `customizer` is invoked
- * with three arguments: (nsValue, key, nsObject).
- *
- * **Note:** This method mutates `object`.
- *
- * @static
- * @memberOf _
- * @since 4.6.0
- * @category Object
- * @param {Object} object The object to modify.
- * @param {Array|string} path The path of the property to set.
- * @param {Function} updater The function to produce the updated value.
- * @param {Function} [customizer] The function to customize assigned values.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var object = {};
- *
- * _.updateWith(object, '[0][1]', _.constant('a'), Object);
- * // => { '0': { '1': 'a' } }
- */
- function updateWith(object, path, updater, customizer) {
- customizer = typeof customizer == 'function' ? customizer : undefined;
- return object == null ? object : baseUpdate(object, path, castFunction(updater), customizer);
- }
- /**
- * Creates an array of the own enumerable string keyed property values of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property values.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.values(new Foo);
- * // => [1, 2] (iteration order is not guaranteed)
- *
- * _.values('hi');
- * // => ['h', 'i']
- */
- function values(object) {
- return object == null ? [] : baseValues(object, keys(object));
- }
- /**
- * Creates an array of the own and inherited enumerable string keyed property
- * values of `object`.
- *
- * **Note:** Non-object values are coerced to objects.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Object
- * @param {Object} object The object to query.
- * @returns {Array} Returns the array of property values.
- * @example
- *
- * function Foo() {
- * this.a = 1;
- * this.b = 2;
- * }
- *
- * Foo.prototype.c = 3;
- *
- * _.valuesIn(new Foo);
- * // => [1, 2, 3] (iteration order is not guaranteed)
- */
- function valuesIn(object) {
- return object == null ? [] : baseValues(object, keysIn(object));
- }
- /*------------------------------------------------------------------------*/
- /**
- * Clamps `number` within the inclusive `lower` and `upper` bounds.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Number
- * @param {number} number The number to clamp.
- * @param {number} [lower] The lower bound.
- * @param {number} upper The upper bound.
- * @returns {number} Returns the clamped number.
- * @example
- *
- * _.clamp(-10, -5, 5);
- * // => -5
- *
- * _.clamp(10, -5, 5);
- * // => 5
- */
- function clamp(number, lower, upper) {
- if (upper === undefined) {
- upper = lower;
- lower = undefined;
- }
- if (upper !== undefined) {
- upper = toNumber(upper);
- upper = upper === upper ? upper : 0;
- }
- if (lower !== undefined) {
- lower = toNumber(lower);
- lower = lower === lower ? lower : 0;
- }
- return baseClamp(toNumber(number), lower, upper);
- }
- /**
- * Checks if `n` is between `start` and up to, but not including, `end`. If
- * `end` is not specified, it's set to `start` with `start` then set to `0`.
- * If `start` is greater than `end` the params are swapped to support
- * negative ranges.
- *
- * @static
- * @memberOf _
- * @since 3.3.0
- * @category Number
- * @param {number} number The number to check.
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @returns {boolean} Returns `true` if `number` is in the range, else `false`.
- * @see _.range, _.rangeRight
- * @example
- *
- * _.inRange(3, 2, 4);
- * // => true
- *
- * _.inRange(4, 8);
- * // => true
- *
- * _.inRange(4, 2);
- * // => false
- *
- * _.inRange(2, 2);
- * // => false
- *
- * _.inRange(1.2, 2);
- * // => true
- *
- * _.inRange(5.2, 4);
- * // => false
- *
- * _.inRange(-3, -2, -6);
- * // => true
- */
- function inRange(number, start, end) {
- start = toFinite(start);
- if (end === undefined) {
- end = start;
- start = 0;
- } else {
- end = toFinite(end);
- }
- number = toNumber(number);
- return baseInRange(number, start, end);
- }
- /**
- * Produces a random number between the inclusive `lower` and `upper` bounds.
- * If only one argument is provided a number between `0` and the given number
- * is returned. If `floating` is `true`, or either `lower` or `upper` are
- * floats, a floating-point number is returned instead of an integer.
- *
- * **Note:** JavaScript follows the IEEE-754 standard for resolving
- * floating-point values which can produce unexpected results.
- *
- * @static
- * @memberOf _
- * @since 0.7.0
- * @category Number
- * @param {number} [lower=0] The lower bound.
- * @param {number} [upper=1] The upper bound.
- * @param {boolean} [floating] Specify returning a floating-point number.
- * @returns {number} Returns the random number.
- * @example
- *
- * _.random(0, 5);
- * // => an integer between 0 and 5
- *
- * _.random(5);
- * // => also an integer between 0 and 5
- *
- * _.random(5, true);
- * // => a floating-point number between 0 and 5
- *
- * _.random(1.2, 5.2);
- * // => a floating-point number between 1.2 and 5.2
- */
- function random(lower, upper, floating) {
- if (floating && typeof floating != 'boolean' && isIterateeCall(lower, upper, floating)) {
- upper = floating = undefined;
- }
- if (floating === undefined) {
- if (typeof upper == 'boolean') {
- floating = upper;
- upper = undefined;
- }
- else if (typeof lower == 'boolean') {
- floating = lower;
- lower = undefined;
- }
- }
- if (lower === undefined && upper === undefined) {
- lower = 0;
- upper = 1;
- }
- else {
- lower = toFinite(lower);
- if (upper === undefined) {
- upper = lower;
- lower = 0;
- } else {
- upper = toFinite(upper);
- }
- }
- if (lower > upper) {
- var temp = lower;
- lower = upper;
- upper = temp;
- }
- if (floating || lower % 1 || upper % 1) {
- var rand = nativeRandom();
- return nativeMin(lower + (rand * (upper - lower + freeParseFloat('1e-' + ((rand + '').length - 1)))), upper);
- }
- return baseRandom(lower, upper);
- }
- /*------------------------------------------------------------------------*/
- /**
- * Converts `string` to [camel case](https://en.wikipedia.org/wiki/CamelCase).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the camel cased string.
- * @example
- *
- * _.camelCase('Foo Bar');
- * // => 'fooBar'
- *
- * _.camelCase('--foo-bar--');
- * // => 'fooBar'
- *
- * _.camelCase('__FOO_BAR__');
- * // => 'fooBar'
- */
- var camelCase = createCompounder(function(result, word, index) {
- word = word.toLowerCase();
- return result + (index ? capitalize(word) : word);
- });
- /**
- * Converts the first character of `string` to upper case and the remaining
- * to lower case.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to capitalize.
- * @returns {string} Returns the capitalized string.
- * @example
- *
- * _.capitalize('FRED');
- * // => 'Fred'
- */
- function capitalize(string) {
- return upperFirst(toString(string).toLowerCase());
- }
- /**
- * Deburrs `string` by converting
- * [Latin-1 Supplement](https://en.wikipedia.org/wiki/Latin-1_Supplement_(Unicode_block)#Character_table)
- * and [Latin Extended-A](https://en.wikipedia.org/wiki/Latin_Extended-A)
- * letters to basic Latin letters and removing
- * [combining diacritical marks](https://en.wikipedia.org/wiki/Combining_Diacritical_Marks).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to deburr.
- * @returns {string} Returns the deburred string.
- * @example
- *
- * _.deburr('déjà vu');
- * // => 'deja vu'
- */
- function deburr(string) {
- string = toString(string);
- return string && string.replace(reLatin, deburrLetter).replace(reComboMark, '');
- }
- /**
- * Checks if `string` ends with the given target string.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to inspect.
- * @param {string} [target] The string to search for.
- * @param {number} [position=string.length] The position to search up to.
- * @returns {boolean} Returns `true` if `string` ends with `target`,
- * else `false`.
- * @example
- *
- * _.endsWith('abc', 'c');
- * // => true
- *
- * _.endsWith('abc', 'b');
- * // => false
- *
- * _.endsWith('abc', 'b', 2);
- * // => true
- */
- function endsWith(string, target, position) {
- string = toString(string);
- target = baseToString(target);
- var length = string.length;
- position = position === undefined
- ? length
- : baseClamp(toInteger(position), 0, length);
- var end = position;
- position -= target.length;
- return position >= 0 && string.slice(position, end) == target;
- }
- /**
- * Converts the characters "&", "<", ">", '"', and "'" in `string` to their
- * corresponding HTML entities.
- *
- * **Note:** No other characters are escaped. To escape additional
- * characters use a third-party library like [_he_](https://mths.be/he).
- *
- * Though the ">" character is escaped for symmetry, characters like
- * ">" and "/" don't need escaping in HTML and have no special meaning
- * unless they're part of a tag or unquoted attribute value. See
- * [Mathias Bynens's article](https://mathiasbynens.be/notes/ambiguous-ampersands)
- * (under "semi-related fun fact") for more details.
- *
- * When working with HTML you should always
- * [quote attribute values](http://wonko.com/post/html-escaping) to reduce
- * XSS vectors.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category String
- * @param {string} [string=''] The string to escape.
- * @returns {string} Returns the escaped string.
- * @example
- *
- * _.escape('fred, barney, & pebbles');
- * // => 'fred, barney, & pebbles'
- */
- function escape(string) {
- string = toString(string);
- return (string && reHasUnescapedHtml.test(string))
- ? string.replace(reUnescapedHtml, escapeHtmlChar)
- : string;
- }
- /**
- * Escapes the `RegExp` special characters "^", "$", "\", ".", "*", "+",
- * "?", "(", ")", "[", "]", "{", "}", and "|" in `string`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to escape.
- * @returns {string} Returns the escaped string.
- * @example
- *
- * _.escapeRegExp('[lodash](https://lodash.com/)');
- * // => '\[lodash\]\(https://lodash\.com/\)'
- */
- function escapeRegExp(string) {
- string = toString(string);
- return (string && reHasRegExpChar.test(string))
- ? string.replace(reRegExpChar, '\\$&')
- : string;
- }
- /**
- * Converts `string` to
- * [kebab case](https://en.wikipedia.org/wiki/Letter_case#Special_case_styles).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the kebab cased string.
- * @example
- *
- * _.kebabCase('Foo Bar');
- * // => 'foo-bar'
- *
- * _.kebabCase('fooBar');
- * // => 'foo-bar'
- *
- * _.kebabCase('__FOO_BAR__');
- * // => 'foo-bar'
- */
- var kebabCase = createCompounder(function(result, word, index) {
- return result + (index ? '-' : '') + word.toLowerCase();
- });
- /**
- * Converts `string`, as space separated words, to lower case.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the lower cased string.
- * @example
- *
- * _.lowerCase('--Foo-Bar--');
- * // => 'foo bar'
- *
- * _.lowerCase('fooBar');
- * // => 'foo bar'
- *
- * _.lowerCase('__FOO_BAR__');
- * // => 'foo bar'
- */
- var lowerCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + word.toLowerCase();
- });
- /**
- * Converts the first character of `string` to lower case.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the converted string.
- * @example
- *
- * _.lowerFirst('Fred');
- * // => 'fred'
- *
- * _.lowerFirst('FRED');
- * // => 'fRED'
- */
- var lowerFirst = createCaseFirst('toLowerCase');
- /**
- * Pads `string` on the left and right sides if it's shorter than `length`.
- * Padding characters are truncated if they can't be evenly divided by `length`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
- * @example
- *
- * _.pad('abc', 8);
- * // => ' abc '
- *
- * _.pad('abc', 8, '_-');
- * // => '_-abc_-_'
- *
- * _.pad('abc', 3);
- * // => 'abc'
- */
- function pad(string, length, chars) {
- string = toString(string);
- length = toInteger(length);
- var strLength = length ? stringSize(string) : 0;
- if (!length || strLength >= length) {
- return string;
- }
- var mid = (length - strLength) / 2;
- return (
- createPadding(nativeFloor(mid), chars) +
- string +
- createPadding(nativeCeil(mid), chars)
- );
- }
- /**
- * Pads `string` on the right side if it's shorter than `length`. Padding
- * characters are truncated if they exceed `length`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
- * @example
- *
- * _.padEnd('abc', 6);
- * // => 'abc '
- *
- * _.padEnd('abc', 6, '_-');
- * // => 'abc_-_'
- *
- * _.padEnd('abc', 3);
- * // => 'abc'
- */
- function padEnd(string, length, chars) {
- string = toString(string);
- length = toInteger(length);
- var strLength = length ? stringSize(string) : 0;
- return (length && strLength < length)
- ? (string + createPadding(length - strLength, chars))
- : string;
- }
- /**
- * Pads `string` on the left side if it's shorter than `length`. Padding
- * characters are truncated if they exceed `length`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to pad.
- * @param {number} [length=0] The padding length.
- * @param {string} [chars=' '] The string used as padding.
- * @returns {string} Returns the padded string.
- * @example
- *
- * _.padStart('abc', 6);
- * // => ' abc'
- *
- * _.padStart('abc', 6, '_-');
- * // => '_-_abc'
- *
- * _.padStart('abc', 3);
- * // => 'abc'
- */
- function padStart(string, length, chars) {
- string = toString(string);
- length = toInteger(length);
- var strLength = length ? stringSize(string) : 0;
- return (length && strLength < length)
- ? (createPadding(length - strLength, chars) + string)
- : string;
- }
- /**
- * Converts `string` to an integer of the specified radix. If `radix` is
- * `undefined` or `0`, a `radix` of `10` is used unless `value` is a
- * hexadecimal, in which case a `radix` of `16` is used.
- *
- * **Note:** This method aligns with the
- * [ES5 implementation](https://es5.github.io/#x15.1.2.2) of `parseInt`.
- *
- * @static
- * @memberOf _
- * @since 1.1.0
- * @category String
- * @param {string} string The string to convert.
- * @param {number} [radix=10] The radix to interpret `value` by.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {number} Returns the converted integer.
- * @example
- *
- * _.parseInt('08');
- * // => 8
- *
- * _.map(['6', '08', '10'], _.parseInt);
- * // => [6, 8, 10]
- */
- function parseInt(string, radix, guard) {
- if (guard || radix == null) {
- radix = 0;
- } else if (radix) {
- radix = +radix;
- }
- return nativeParseInt(toString(string).replace(reTrimStart, ''), radix || 0);
- }
- /**
- * Repeats the given string `n` times.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to repeat.
- * @param {number} [n=1] The number of times to repeat the string.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {string} Returns the repeated string.
- * @example
- *
- * _.repeat('*', 3);
- * // => '***'
- *
- * _.repeat('abc', 2);
- * // => 'abcabc'
- *
- * _.repeat('abc', 0);
- * // => ''
- */
- function repeat(string, n, guard) {
- if ((guard ? isIterateeCall(string, n, guard) : n === undefined)) {
- n = 1;
- } else {
- n = toInteger(n);
- }
- return baseRepeat(toString(string), n);
- }
- /**
- * Replaces matches for `pattern` in `string` with `replacement`.
- *
- * **Note:** This method is based on
- * [`String#replace`](https://mdn.io/String/replace).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to modify.
- * @param {RegExp|string} pattern The pattern to replace.
- * @param {Function|string} replacement The match replacement.
- * @returns {string} Returns the modified string.
- * @example
- *
- * _.replace('Hi Fred', 'Fred', 'Barney');
- * // => 'Hi Barney'
- */
- function replace() {
- var args = arguments,
- string = toString(args[0]);
- return args.length < 3 ? string : string.replace(args[1], args[2]);
- }
- /**
- * Converts `string` to
- * [snake case](https://en.wikipedia.org/wiki/Snake_case).
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the snake cased string.
- * @example
- *
- * _.snakeCase('Foo Bar');
- * // => 'foo_bar'
- *
- * _.snakeCase('fooBar');
- * // => 'foo_bar'
- *
- * _.snakeCase('--FOO-BAR--');
- * // => 'foo_bar'
- */
- var snakeCase = createCompounder(function(result, word, index) {
- return result + (index ? '_' : '') + word.toLowerCase();
- });
- /**
- * Splits `string` by `separator`.
- *
- * **Note:** This method is based on
- * [`String#split`](https://mdn.io/String/split).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to split.
- * @param {RegExp|string} separator The separator pattern to split by.
- * @param {number} [limit] The length to truncate results to.
- * @returns {Array} Returns the string segments.
- * @example
- *
- * _.split('a-b-c', '-', 2);
- * // => ['a', 'b']
- */
- function split(string, separator, limit) {
- if (limit && typeof limit != 'number' && isIterateeCall(string, separator, limit)) {
- separator = limit = undefined;
- }
- limit = limit === undefined ? MAX_ARRAY_LENGTH : limit >>> 0;
- if (!limit) {
- return [];
- }
- string = toString(string);
- if (string && (
- typeof separator == 'string' ||
- (separator != null && !isRegExp(separator))
- )) {
- separator = baseToString(separator);
- if (!separator && hasUnicode(string)) {
- return castSlice(stringToArray(string), 0, limit);
- }
- }
- return string.split(separator, limit);
- }
- /**
- * Converts `string` to
- * [start case](https://en.wikipedia.org/wiki/Letter_case#Stylistic_or_specialised_usage).
- *
- * @static
- * @memberOf _
- * @since 3.1.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the start cased string.
- * @example
- *
- * _.startCase('--foo-bar--');
- * // => 'Foo Bar'
- *
- * _.startCase('fooBar');
- * // => 'Foo Bar'
- *
- * _.startCase('__FOO_BAR__');
- * // => 'FOO BAR'
- */
- var startCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + upperFirst(word);
- });
- /**
- * Checks if `string` starts with the given target string.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to inspect.
- * @param {string} [target] The string to search for.
- * @param {number} [position=0] The position to search from.
- * @returns {boolean} Returns `true` if `string` starts with `target`,
- * else `false`.
- * @example
- *
- * _.startsWith('abc', 'a');
- * // => true
- *
- * _.startsWith('abc', 'b');
- * // => false
- *
- * _.startsWith('abc', 'b', 1);
- * // => true
- */
- function startsWith(string, target, position) {
- string = toString(string);
- position = position == null
- ? 0
- : baseClamp(toInteger(position), 0, string.length);
- target = baseToString(target);
- return string.slice(position, position + target.length) == target;
- }
- /**
- * Creates a compiled template function that can interpolate data properties
- * in "interpolate" delimiters, HTML-escape interpolated data properties in
- * "escape" delimiters, and execute JavaScript in "evaluate" delimiters. Data
- * properties may be accessed as free variables in the template. If a setting
- * object is given, it takes precedence over `_.templateSettings` values.
- *
- * **Note:** In the development build `_.template` utilizes
- * [sourceURLs](http://www.html5rocks.com/en/tutorials/developertools/sourcemaps/#toc-sourceurl)
- * for easier debugging.
- *
- * For more information on precompiling templates see
- * [lodash's custom builds documentation](https://lodash.com/custom-builds).
- *
- * For more information on Chrome extension sandboxes see
- * [Chrome's extensions documentation](https://developer.chrome.com/extensions/sandboxingEval).
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category String
- * @param {string} [string=''] The template string.
- * @param {Object} [options={}] The options object.
- * @param {RegExp} [options.escape=_.templateSettings.escape]
- * The HTML "escape" delimiter.
- * @param {RegExp} [options.evaluate=_.templateSettings.evaluate]
- * The "evaluate" delimiter.
- * @param {Object} [options.imports=_.templateSettings.imports]
- * An object to import into the template as free variables.
- * @param {RegExp} [options.interpolate=_.templateSettings.interpolate]
- * The "interpolate" delimiter.
- * @param {string} [options.sourceURL='lodash.templateSources[n]']
- * The sourceURL of the compiled template.
- * @param {string} [options.variable='obj']
- * The data object variable name.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Function} Returns the compiled template function.
- * @example
- *
- * // Use the "interpolate" delimiter to create a compiled template.
- * var compiled = _.template('hello <%= user %>!');
- * compiled({ 'user': 'fred' });
- * // => 'hello fred!'
- *
- * // Use the HTML "escape" delimiter to escape data property values.
- * var compiled = _.template('<b><%- value %></b>');
- * compiled({ 'value': '<script>' });
- * // => '<b><script></b>'
- *
- * // Use the "evaluate" delimiter to execute JavaScript and generate HTML.
- * var compiled = _.template('<% _.forEach(users, function(user) { %><li><%- user %></li><% }); %>');
- * compiled({ 'users': ['fred', 'barney'] });
- * // => '<li>fred</li><li>barney</li>'
- *
- * // Use the internal `print` function in "evaluate" delimiters.
- * var compiled = _.template('<% print("hello " + user); %>!');
- * compiled({ 'user': 'barney' });
- * // => 'hello barney!'
- *
- * // Use the ES template literal delimiter as an "interpolate" delimiter.
- * // Disable support by replacing the "interpolate" delimiter.
- * var compiled = _.template('hello ${ user }!');
- * compiled({ 'user': 'pebbles' });
- * // => 'hello pebbles!'
- *
- * // Use backslashes to treat delimiters as plain text.
- * var compiled = _.template('<%= "\\<%- value %\\>" %>');
- * compiled({ 'value': 'ignored' });
- * // => '<%- value %>'
- *
- * // Use the `imports` option to import `jQuery` as `jq`.
- * var text = '<% jq.each(users, function(user) { %><li><%- user %></li><% }); %>';
- * var compiled = _.template(text, { 'imports': { 'jq': jQuery } });
- * compiled({ 'users': ['fred', 'barney'] });
- * // => '<li>fred</li><li>barney</li>'
- *
- * // Use the `sourceURL` option to specify a custom sourceURL for the template.
- * var compiled = _.template('hello <%= user %>!', { 'sourceURL': '/basic/greeting.jst' });
- * compiled(data);
- * // => Find the source of "greeting.jst" under the Sources tab or Resources panel of the web inspector.
- *
- * // Use the `variable` option to ensure a with-statement isn't used in the compiled template.
- * var compiled = _.template('hi <%= data.user %>!', { 'variable': 'data' });
- * compiled.source;
- * // => function(data) {
- * // var __t, __p = '';
- * // __p += 'hi ' + ((__t = ( data.user )) == null ? '' : __t) + '!';
- * // return __p;
- * // }
- *
- * // Use custom template delimiters.
- * _.templateSettings.interpolate = /{{([\s\S]+?)}}/g;
- * var compiled = _.template('hello {{ user }}!');
- * compiled({ 'user': 'mustache' });
- * // => 'hello mustache!'
- *
- * // Use the `source` property to inline compiled templates for meaningful
- * // line numbers in error messages and stack traces.
- * fs.writeFileSync(path.join(process.cwd(), 'jst.js'), '\
- * var JST = {\
- * "main": ' + _.template(mainText).source + '\
- * };\
- * ');
- */
- function template(string, options, guard) {
- // Based on John Resig's `tmpl` implementation
- // (http://ejohn.org/blog/javascript-micro-templating/)
- // and Laura Doktorova's doT.js (https://github.com/olado/doT).
- var settings = lodash.templateSettings;
- if (guard && isIterateeCall(string, options, guard)) {
- options = undefined;
- }
- string = toString(string);
- options = assignInWith({}, options, settings, customDefaultsAssignIn);
- var imports = assignInWith({}, options.imports, settings.imports, customDefaultsAssignIn),
- importsKeys = keys(imports),
- importsValues = baseValues(imports, importsKeys);
- var isEscaping,
- isEvaluating,
- index = 0,
- interpolate = options.interpolate || reNoMatch,
- source = "__p += '";
- // Compile the regexp to match each delimiter.
- var reDelimiters = RegExp(
- (options.escape || reNoMatch).source + '|' +
- interpolate.source + '|' +
- (interpolate === reInterpolate ? reEsTemplate : reNoMatch).source + '|' +
- (options.evaluate || reNoMatch).source + '|$'
- , 'g');
- // Use a sourceURL for easier debugging.
- // The sourceURL gets injected into the source that's eval-ed, so be careful
- // to normalize all kinds of whitespace, so e.g. newlines (and unicode versions of it) can't sneak in
- // and escape the comment, thus injecting code that gets evaled.
- var sourceURL = '//# sourceURL=' +
- (hasOwnProperty.call(options, 'sourceURL')
- ? (options.sourceURL + '').replace(/\s/g, ' ')
- : ('lodash.templateSources[' + (++templateCounter) + ']')
- ) + '\n';
- string.replace(reDelimiters, function(match, escapeValue, interpolateValue, esTemplateValue, evaluateValue, offset) {
- interpolateValue || (interpolateValue = esTemplateValue);
- // Escape characters that can't be included in string literals.
- source += string.slice(index, offset).replace(reUnescapedString, escapeStringChar);
- // Replace delimiters with snippets.
- if (escapeValue) {
- isEscaping = true;
- source += "' +\n__e(" + escapeValue + ") +\n'";
- }
- if (evaluateValue) {
- isEvaluating = true;
- source += "';\n" + evaluateValue + ";\n__p += '";
- }
- if (interpolateValue) {
- source += "' +\n((__t = (" + interpolateValue + ")) == null ? '' : __t) +\n'";
- }
- index = offset + match.length;
- // The JS engine embedded in Adobe products needs `match` returned in
- // order to produce the correct `offset` value.
- return match;
- });
- source += "';\n";
- // If `variable` is not specified wrap a with-statement around the generated
- // code to add the data object to the top of the scope chain.
- var variable = hasOwnProperty.call(options, 'variable') && options.variable;
- if (!variable) {
- source = 'with (obj) {\n' + source + '\n}\n';
- }
- // Cleanup code by stripping empty strings.
- source = (isEvaluating ? source.replace(reEmptyStringLeading, '') : source)
- .replace(reEmptyStringMiddle, '$1')
- .replace(reEmptyStringTrailing, '$1;');
- // Frame code as the function body.
- source = 'function(' + (variable || 'obj') + ') {\n' +
- (variable
- ? ''
- : 'obj || (obj = {});\n'
- ) +
- "var __t, __p = ''" +
- (isEscaping
- ? ', __e = _.escape'
- : ''
- ) +
- (isEvaluating
- ? ', __j = Array.prototype.join;\n' +
- "function print() { __p += __j.call(arguments, '') }\n"
- : ';\n'
- ) +
- source +
- 'return __p\n}';
- var result = attempt(function() {
- return Function(importsKeys, sourceURL + 'return ' + source)
- .apply(undefined, importsValues);
- });
- // Provide the compiled function's source by its `toString` method or
- // the `source` property as a convenience for inlining compiled templates.
- result.source = source;
- if (isError(result)) {
- throw result;
- }
- return result;
- }
- /**
- * Converts `string`, as a whole, to lower case just like
- * [String#toLowerCase](https://mdn.io/toLowerCase).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the lower cased string.
- * @example
- *
- * _.toLower('--Foo-Bar--');
- * // => '--foo-bar--'
- *
- * _.toLower('fooBar');
- * // => 'foobar'
- *
- * _.toLower('__FOO_BAR__');
- * // => '__foo_bar__'
- */
- function toLower(value) {
- return toString(value).toLowerCase();
- }
- /**
- * Converts `string`, as a whole, to upper case just like
- * [String#toUpperCase](https://mdn.io/toUpperCase).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the upper cased string.
- * @example
- *
- * _.toUpper('--foo-bar--');
- * // => '--FOO-BAR--'
- *
- * _.toUpper('fooBar');
- * // => 'FOOBAR'
- *
- * _.toUpper('__foo_bar__');
- * // => '__FOO_BAR__'
- */
- function toUpper(value) {
- return toString(value).toUpperCase();
- }
- /**
- * Removes leading and trailing whitespace or specified characters from `string`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {string} Returns the trimmed string.
- * @example
- *
- * _.trim(' abc ');
- * // => 'abc'
- *
- * _.trim('-_-abc-_-', '_-');
- * // => 'abc'
- *
- * _.map([' foo ', ' bar '], _.trim);
- * // => ['foo', 'bar']
- */
- function trim(string, chars, guard) {
- string = toString(string);
- if (string && (guard || chars === undefined)) {
- return string.replace(reTrim, '');
- }
- if (!string || !(chars = baseToString(chars))) {
- return string;
- }
- var strSymbols = stringToArray(string),
- chrSymbols = stringToArray(chars),
- start = charsStartIndex(strSymbols, chrSymbols),
- end = charsEndIndex(strSymbols, chrSymbols) + 1;
- return castSlice(strSymbols, start, end).join('');
- }
- /**
- * Removes trailing whitespace or specified characters from `string`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {string} Returns the trimmed string.
- * @example
- *
- * _.trimEnd(' abc ');
- * // => ' abc'
- *
- * _.trimEnd('-_-abc-_-', '_-');
- * // => '-_-abc'
- */
- function trimEnd(string, chars, guard) {
- string = toString(string);
- if (string && (guard || chars === undefined)) {
- return string.replace(reTrimEnd, '');
- }
- if (!string || !(chars = baseToString(chars))) {
- return string;
- }
- var strSymbols = stringToArray(string),
- end = charsEndIndex(strSymbols, stringToArray(chars)) + 1;
- return castSlice(strSymbols, 0, end).join('');
- }
- /**
- * Removes leading whitespace or specified characters from `string`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to trim.
- * @param {string} [chars=whitespace] The characters to trim.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {string} Returns the trimmed string.
- * @example
- *
- * _.trimStart(' abc ');
- * // => 'abc '
- *
- * _.trimStart('-_-abc-_-', '_-');
- * // => 'abc-_-'
- */
- function trimStart(string, chars, guard) {
- string = toString(string);
- if (string && (guard || chars === undefined)) {
- return string.replace(reTrimStart, '');
- }
- if (!string || !(chars = baseToString(chars))) {
- return string;
- }
- var strSymbols = stringToArray(string),
- start = charsStartIndex(strSymbols, stringToArray(chars));
- return castSlice(strSymbols, start).join('');
- }
- /**
- * Truncates `string` if it's longer than the given maximum string length.
- * The last characters of the truncated string are replaced with the omission
- * string which defaults to "...".
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to truncate.
- * @param {Object} [options={}] The options object.
- * @param {number} [options.length=30] The maximum string length.
- * @param {string} [options.omission='...'] The string to indicate text is omitted.
- * @param {RegExp|string} [options.separator] The separator pattern to truncate to.
- * @returns {string} Returns the truncated string.
- * @example
- *
- * _.truncate('hi-diddly-ho there, neighborino');
- * // => 'hi-diddly-ho there, neighbo...'
- *
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'length': 24,
- * 'separator': ' '
- * });
- * // => 'hi-diddly-ho there,...'
- *
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'length': 24,
- * 'separator': /,? +/
- * });
- * // => 'hi-diddly-ho there...'
- *
- * _.truncate('hi-diddly-ho there, neighborino', {
- * 'omission': ' [...]'
- * });
- * // => 'hi-diddly-ho there, neig [...]'
- */
- function truncate(string, options) {
- var length = DEFAULT_TRUNC_LENGTH,
- omission = DEFAULT_TRUNC_OMISSION;
- if (isObject(options)) {
- var separator = 'separator' in options ? options.separator : separator;
- length = 'length' in options ? toInteger(options.length) : length;
- omission = 'omission' in options ? baseToString(options.omission) : omission;
- }
- string = toString(string);
- var strLength = string.length;
- if (hasUnicode(string)) {
- var strSymbols = stringToArray(string);
- strLength = strSymbols.length;
- }
- if (length >= strLength) {
- return string;
- }
- var end = length - stringSize(omission);
- if (end < 1) {
- return omission;
- }
- var result = strSymbols
- ? castSlice(strSymbols, 0, end).join('')
- : string.slice(0, end);
- if (separator === undefined) {
- return result + omission;
- }
- if (strSymbols) {
- end += (result.length - end);
- }
- if (isRegExp(separator)) {
- if (string.slice(end).search(separator)) {
- var match,
- substring = result;
- if (!separator.global) {
- separator = RegExp(separator.source, toString(reFlags.exec(separator)) + 'g');
- }
- separator.lastIndex = 0;
- while ((match = separator.exec(substring))) {
- var newEnd = match.index;
- }
- result = result.slice(0, newEnd === undefined ? end : newEnd);
- }
- } else if (string.indexOf(baseToString(separator), end) != end) {
- var index = result.lastIndexOf(separator);
- if (index > -1) {
- result = result.slice(0, index);
- }
- }
- return result + omission;
- }
- /**
- * The inverse of `_.escape`; this method converts the HTML entities
- * `&`, `<`, `>`, `"`, and `'` in `string` to
- * their corresponding characters.
- *
- * **Note:** No other HTML entities are unescaped. To unescape additional
- * HTML entities use a third-party library like [_he_](https://mths.be/he).
- *
- * @static
- * @memberOf _
- * @since 0.6.0
- * @category String
- * @param {string} [string=''] The string to unescape.
- * @returns {string} Returns the unescaped string.
- * @example
- *
- * _.unescape('fred, barney, & pebbles');
- * // => 'fred, barney, & pebbles'
- */
- function unescape(string) {
- string = toString(string);
- return (string && reHasEscapedHtml.test(string))
- ? string.replace(reEscapedHtml, unescapeHtmlChar)
- : string;
- }
- /**
- * Converts `string`, as space separated words, to upper case.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the upper cased string.
- * @example
- *
- * _.upperCase('--foo-bar');
- * // => 'FOO BAR'
- *
- * _.upperCase('fooBar');
- * // => 'FOO BAR'
- *
- * _.upperCase('__foo_bar__');
- * // => 'FOO BAR'
- */
- var upperCase = createCompounder(function(result, word, index) {
- return result + (index ? ' ' : '') + word.toUpperCase();
- });
- /**
- * Converts the first character of `string` to upper case.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category String
- * @param {string} [string=''] The string to convert.
- * @returns {string} Returns the converted string.
- * @example
- *
- * _.upperFirst('fred');
- * // => 'Fred'
- *
- * _.upperFirst('FRED');
- * // => 'FRED'
- */
- var upperFirst = createCaseFirst('toUpperCase');
- /**
- * Splits `string` into an array of its words.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category String
- * @param {string} [string=''] The string to inspect.
- * @param {RegExp|string} [pattern] The pattern to match words.
- * @param- {Object} [guard] Enables use as an iteratee for methods like `_.map`.
- * @returns {Array} Returns the words of `string`.
- * @example
- *
- * _.words('fred, barney, & pebbles');
- * // => ['fred', 'barney', 'pebbles']
- *
- * _.words('fred, barney, & pebbles', /[^, ]+/g);
- * // => ['fred', 'barney', '&', 'pebbles']
- */
- function words(string, pattern, guard) {
- string = toString(string);
- pattern = guard ? undefined : pattern;
- if (pattern === undefined) {
- return hasUnicodeWord(string) ? unicodeWords(string) : asciiWords(string);
- }
- return string.match(pattern) || [];
- }
- /*------------------------------------------------------------------------*/
- /**
- * Attempts to invoke `func`, returning either the result or the caught error
- * object. Any additional arguments are provided to `func` when it's invoked.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Util
- * @param {Function} func The function to attempt.
- * @param {...*} [args] The arguments to invoke `func` with.
- * @returns {*} Returns the `func` result or error object.
- * @example
- *
- * // Avoid throwing errors for invalid selectors.
- * var elements = _.attempt(function(selector) {
- * return document.querySelectorAll(selector);
- * }, '>_>');
- *
- * if (_.isError(elements)) {
- * elements = [];
- * }
- */
- var attempt = baseRest(function(func, args) {
- try {
- return apply(func, undefined, args);
- } catch (e) {
- return isError(e) ? e : new Error(e);
- }
- });
- /**
- * Binds methods of an object to the object itself, overwriting the existing
- * method.
- *
- * **Note:** This method doesn't set the "length" property of bound functions.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {Object} object The object to bind and assign the bound methods to.
- * @param {...(string|string[])} methodNames The object method names to bind.
- * @returns {Object} Returns `object`.
- * @example
- *
- * var view = {
- * 'label': 'docs',
- * 'click': function() {
- * console.log('clicked ' + this.label);
- * }
- * };
- *
- * _.bindAll(view, ['click']);
- * jQuery(element).on('click', view.click);
- * // => Logs 'clicked docs' when clicked.
- */
- var bindAll = flatRest(function(object, methodNames) {
- arrayEach(methodNames, function(key) {
- key = toKey(key);
- baseAssignValue(object, key, bind(object[key], object));
- });
- return object;
- });
- /**
- * Creates a function that iterates over `pairs` and invokes the corresponding
- * function of the first predicate to return truthy. The predicate-function
- * pairs are invoked with the `this` binding and arguments of the created
- * function.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {Array} pairs The predicate-function pairs.
- * @returns {Function} Returns the new composite function.
- * @example
- *
- * var func = _.cond([
- * [_.matches({ 'a': 1 }), _.constant('matches A')],
- * [_.conforms({ 'b': _.isNumber }), _.constant('matches B')],
- * [_.stubTrue, _.constant('no match')]
- * ]);
- *
- * func({ 'a': 1, 'b': 2 });
- * // => 'matches A'
- *
- * func({ 'a': 0, 'b': 1 });
- * // => 'matches B'
- *
- * func({ 'a': '1', 'b': '2' });
- * // => 'no match'
- */
- function cond(pairs) {
- var length = pairs == null ? 0 : pairs.length,
- toIteratee = getIteratee();
- pairs = !length ? [] : arrayMap(pairs, function(pair) {
- if (typeof pair[1] != 'function') {
- throw new TypeError(FUNC_ERROR_TEXT);
- }
- return [toIteratee(pair[0]), pair[1]];
- });
- return baseRest(function(args) {
- var index = -1;
- while (++index < length) {
- var pair = pairs[index];
- if (apply(pair[0], this, args)) {
- return apply(pair[1], this, args);
- }
- }
- });
- }
- /**
- * Creates a function that invokes the predicate properties of `source` with
- * the corresponding property values of a given object, returning `true` if
- * all predicates return truthy, else `false`.
- *
- * **Note:** The created function is equivalent to `_.conformsTo` with
- * `source` partially applied.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {Object} source The object of property predicates to conform to.
- * @returns {Function} Returns the new spec function.
- * @example
- *
- * var objects = [
- * { 'a': 2, 'b': 1 },
- * { 'a': 1, 'b': 2 }
- * ];
- *
- * _.filter(objects, _.conforms({ 'b': function(n) { return n > 1; } }));
- * // => [{ 'a': 1, 'b': 2 }]
- */
- function conforms(source) {
- return baseConforms(baseClone(source, CLONE_DEEP_FLAG));
- }
- /**
- * Creates a function that returns `value`.
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Util
- * @param {*} value The value to return from the new function.
- * @returns {Function} Returns the new constant function.
- * @example
- *
- * var objects = _.times(2, _.constant({ 'a': 1 }));
- *
- * console.log(objects);
- * // => [{ 'a': 1 }, { 'a': 1 }]
- *
- * console.log(objects[0] === objects[1]);
- * // => true
- */
- function constant(value) {
- return function() {
- return value;
- };
- }
- /**
- * Checks `value` to determine whether a default value should be returned in
- * its place. The `defaultValue` is returned if `value` is `NaN`, `null`,
- * or `undefined`.
- *
- * @static
- * @memberOf _
- * @since 4.14.0
- * @category Util
- * @param {*} value The value to check.
- * @param {*} defaultValue The default value.
- * @returns {*} Returns the resolved value.
- * @example
- *
- * _.defaultTo(1, 10);
- * // => 1
- *
- * _.defaultTo(undefined, 10);
- * // => 10
- */
- function defaultTo(value, defaultValue) {
- return (value == null || value !== value) ? defaultValue : value;
- }
- /**
- * Creates a function that returns the result of invoking the given functions
- * with the `this` binding of the created function, where each successive
- * invocation is supplied the return value of the previous.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Util
- * @param {...(Function|Function[])} [funcs] The functions to invoke.
- * @returns {Function} Returns the new composite function.
- * @see _.flowRight
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var addSquare = _.flow([_.add, square]);
- * addSquare(1, 2);
- * // => 9
- */
- var flow = createFlow();
- /**
- * This method is like `_.flow` except that it creates a function that
- * invokes the given functions from right to left.
- *
- * @static
- * @since 3.0.0
- * @memberOf _
- * @category Util
- * @param {...(Function|Function[])} [funcs] The functions to invoke.
- * @returns {Function} Returns the new composite function.
- * @see _.flow
- * @example
- *
- * function square(n) {
- * return n * n;
- * }
- *
- * var addSquare = _.flowRight([square, _.add]);
- * addSquare(1, 2);
- * // => 9
- */
- var flowRight = createFlow(true);
- /**
- * This method returns the first argument it receives.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {*} value Any value.
- * @returns {*} Returns `value`.
- * @example
- *
- * var object = { 'a': 1 };
- *
- * console.log(_.identity(object) === object);
- * // => true
- */
- function identity(value) {
- return value;
- }
- /**
- * Creates a function that invokes `func` with the arguments of the created
- * function. If `func` is a property name, the created function returns the
- * property value for a given element. If `func` is an array or object, the
- * created function returns `true` for elements that contain the equivalent
- * source properties, otherwise it returns `false`.
- *
- * @static
- * @since 4.0.0
- * @memberOf _
- * @category Util
- * @param {*} [func=_.identity] The value to convert to a callback.
- * @returns {Function} Returns the callback.
- * @example
- *
- * var users = [
- * { 'user': 'barney', 'age': 36, 'active': true },
- * { 'user': 'fred', 'age': 40, 'active': false }
- * ];
- *
- * // The `_.matches` iteratee shorthand.
- * _.filter(users, _.iteratee({ 'user': 'barney', 'active': true }));
- * // => [{ 'user': 'barney', 'age': 36, 'active': true }]
- *
- * // The `_.matchesProperty` iteratee shorthand.
- * _.filter(users, _.iteratee(['user', 'fred']));
- * // => [{ 'user': 'fred', 'age': 40 }]
- *
- * // The `_.property` iteratee shorthand.
- * _.map(users, _.iteratee('user'));
- * // => ['barney', 'fred']
- *
- * // Create custom iteratee shorthands.
- * _.iteratee = _.wrap(_.iteratee, function(iteratee, func) {
- * return !_.isRegExp(func) ? iteratee(func) : function(string) {
- * return func.test(string);
- * };
- * });
- *
- * _.filter(['abc', 'def'], /ef/);
- * // => ['def']
- */
- function iteratee(func) {
- return baseIteratee(typeof func == 'function' ? func : baseClone(func, CLONE_DEEP_FLAG));
- }
- /**
- * Creates a function that performs a partial deep comparison between a given
- * object and `source`, returning `true` if the given object has equivalent
- * property values, else `false`.
- *
- * **Note:** The created function is equivalent to `_.isMatch` with `source`
- * partially applied.
- *
- * Partial comparisons will match empty array and empty object `source`
- * values against any array or object value, respectively. See `_.isEqual`
- * for a list of supported value comparisons.
- *
- * **Note:** Multiple values can be checked by combining several matchers
- * using `_.overSome`
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Util
- * @param {Object} source The object of property values to match.
- * @returns {Function} Returns the new spec function.
- * @example
- *
- * var objects = [
- * { 'a': 1, 'b': 2, 'c': 3 },
- * { 'a': 4, 'b': 5, 'c': 6 }
- * ];
- *
- * _.filter(objects, _.matches({ 'a': 4, 'c': 6 }));
- * // => [{ 'a': 4, 'b': 5, 'c': 6 }]
- *
- * // Checking for several possible values
- * _.filter(objects, _.overSome([_.matches({ 'a': 1 }), _.matches({ 'a': 4 })]));
- * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
- */
- function matches(source) {
- return baseMatches(baseClone(source, CLONE_DEEP_FLAG));
- }
- /**
- * Creates a function that performs a partial deep comparison between the
- * value at `path` of a given object to `srcValue`, returning `true` if the
- * object value is equivalent, else `false`.
- *
- * **Note:** Partial comparisons will match empty array and empty object
- * `srcValue` values against any array or object value, respectively. See
- * `_.isEqual` for a list of supported value comparisons.
- *
- * **Note:** Multiple values can be checked by combining several matchers
- * using `_.overSome`
- *
- * @static
- * @memberOf _
- * @since 3.2.0
- * @category Util
- * @param {Array|string} path The path of the property to get.
- * @param {*} srcValue The value to match.
- * @returns {Function} Returns the new spec function.
- * @example
- *
- * var objects = [
- * { 'a': 1, 'b': 2, 'c': 3 },
- * { 'a': 4, 'b': 5, 'c': 6 }
- * ];
- *
- * _.find(objects, _.matchesProperty('a', 4));
- * // => { 'a': 4, 'b': 5, 'c': 6 }
- *
- * // Checking for several possible values
- * _.filter(objects, _.overSome([_.matchesProperty('a', 1), _.matchesProperty('a', 4)]));
- * // => [{ 'a': 1, 'b': 2, 'c': 3 }, { 'a': 4, 'b': 5, 'c': 6 }]
- */
- function matchesProperty(path, srcValue) {
- return baseMatchesProperty(path, baseClone(srcValue, CLONE_DEEP_FLAG));
- }
- /**
- * Creates a function that invokes the method at `path` of a given object.
- * Any additional arguments are provided to the invoked method.
- *
- * @static
- * @memberOf _
- * @since 3.7.0
- * @category Util
- * @param {Array|string} path The path of the method to invoke.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {Function} Returns the new invoker function.
- * @example
- *
- * var objects = [
- * { 'a': { 'b': _.constant(2) } },
- * { 'a': { 'b': _.constant(1) } }
- * ];
- *
- * _.map(objects, _.method('a.b'));
- * // => [2, 1]
- *
- * _.map(objects, _.method(['a', 'b']));
- * // => [2, 1]
- */
- var method = baseRest(function(path, args) {
- return function(object) {
- return baseInvoke(object, path, args);
- };
- });
- /**
- * The opposite of `_.method`; this method creates a function that invokes
- * the method at a given path of `object`. Any additional arguments are
- * provided to the invoked method.
- *
- * @static
- * @memberOf _
- * @since 3.7.0
- * @category Util
- * @param {Object} object The object to query.
- * @param {...*} [args] The arguments to invoke the method with.
- * @returns {Function} Returns the new invoker function.
- * @example
- *
- * var array = _.times(3, _.constant),
- * object = { 'a': array, 'b': array, 'c': array };
- *
- * _.map(['a[2]', 'c[0]'], _.methodOf(object));
- * // => [2, 0]
- *
- * _.map([['a', '2'], ['c', '0']], _.methodOf(object));
- * // => [2, 0]
- */
- var methodOf = baseRest(function(object, args) {
- return function(path) {
- return baseInvoke(object, path, args);
- };
- });
- /**
- * Adds all own enumerable string keyed function properties of a source
- * object to the destination object. If `object` is a function, then methods
- * are added to its prototype as well.
- *
- * **Note:** Use `_.runInContext` to create a pristine `lodash` function to
- * avoid conflicts caused by modifying the original.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {Function|Object} [object=lodash] The destination object.
- * @param {Object} source The object of functions to add.
- * @param {Object} [options={}] The options object.
- * @param {boolean} [options.chain=true] Specify whether mixins are chainable.
- * @returns {Function|Object} Returns `object`.
- * @example
- *
- * function vowels(string) {
- * return _.filter(string, function(v) {
- * return /[aeiou]/i.test(v);
- * });
- * }
- *
- * _.mixin({ 'vowels': vowels });
- * _.vowels('fred');
- * // => ['e']
- *
- * _('fred').vowels().value();
- * // => ['e']
- *
- * _.mixin({ 'vowels': vowels }, { 'chain': false });
- * _('fred').vowels();
- * // => ['e']
- */
- function mixin(object, source, options) {
- var props = keys(source),
- methodNames = baseFunctions(source, props);
- if (options == null &&
- !(isObject(source) && (methodNames.length || !props.length))) {
- options = source;
- source = object;
- object = this;
- methodNames = baseFunctions(source, keys(source));
- }
- var chain = !(isObject(options) && 'chain' in options) || !!options.chain,
- isFunc = isFunction(object);
- arrayEach(methodNames, function(methodName) {
- var func = source[methodName];
- object[methodName] = func;
- if (isFunc) {
- object.prototype[methodName] = function() {
- var chainAll = this.__chain__;
- if (chain || chainAll) {
- var result = object(this.__wrapped__),
- actions = result.__actions__ = copyArray(this.__actions__);
- actions.push({ 'func': func, 'args': arguments, 'thisArg': object });
- result.__chain__ = chainAll;
- return result;
- }
- return func.apply(object, arrayPush([this.value()], arguments));
- };
- }
- });
- return object;
- }
- /**
- * Reverts the `_` variable to its previous value and returns a reference to
- * the `lodash` function.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @returns {Function} Returns the `lodash` function.
- * @example
- *
- * var lodash = _.noConflict();
- */
- function noConflict() {
- if (root._ === this) {
- root._ = oldDash;
- }
- return this;
- }
- /**
- * This method returns `undefined`.
- *
- * @static
- * @memberOf _
- * @since 2.3.0
- * @category Util
- * @example
- *
- * _.times(2, _.noop);
- * // => [undefined, undefined]
- */
- function noop() {
- // No operation performed.
- }
- /**
- * Creates a function that gets the argument at index `n`. If `n` is negative,
- * the nth argument from the end is returned.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {number} [n=0] The index of the argument to return.
- * @returns {Function} Returns the new pass-thru function.
- * @example
- *
- * var func = _.nthArg(1);
- * func('a', 'b', 'c', 'd');
- * // => 'b'
- *
- * var func = _.nthArg(-2);
- * func('a', 'b', 'c', 'd');
- * // => 'c'
- */
- function nthArg(n) {
- n = toInteger(n);
- return baseRest(function(args) {
- return baseNth(args, n);
- });
- }
- /**
- * Creates a function that invokes `iteratees` with the arguments it receives
- * and returns their results.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {...(Function|Function[])} [iteratees=[_.identity]]
- * The iteratees to invoke.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var func = _.over([Math.max, Math.min]);
- *
- * func(1, 2, 3, 4);
- * // => [4, 1]
- */
- var over = createOver(arrayMap);
- /**
- * Creates a function that checks if **all** of the `predicates` return
- * truthy when invoked with the arguments it receives.
- *
- * Following shorthands are possible for providing predicates.
- * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
- * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {...(Function|Function[])} [predicates=[_.identity]]
- * The predicates to check.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var func = _.overEvery([Boolean, isFinite]);
- *
- * func('1');
- * // => true
- *
- * func(null);
- * // => false
- *
- * func(NaN);
- * // => false
- */
- var overEvery = createOver(arrayEvery);
- /**
- * Creates a function that checks if **any** of the `predicates` return
- * truthy when invoked with the arguments it receives.
- *
- * Following shorthands are possible for providing predicates.
- * Pass an `Object` and it will be used as an parameter for `_.matches` to create the predicate.
- * Pass an `Array` of parameters for `_.matchesProperty` and the predicate will be created using them.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {...(Function|Function[])} [predicates=[_.identity]]
- * The predicates to check.
- * @returns {Function} Returns the new function.
- * @example
- *
- * var func = _.overSome([Boolean, isFinite]);
- *
- * func('1');
- * // => true
- *
- * func(null);
- * // => true
- *
- * func(NaN);
- * // => false
- *
- * var matchesFunc = _.overSome([{ 'a': 1 }, { 'a': 2 }])
- * var matchesPropertyFunc = _.overSome([['a', 1], ['a', 2]])
- */
- var overSome = createOver(arraySome);
- /**
- * Creates a function that returns the value at `path` of a given object.
- *
- * @static
- * @memberOf _
- * @since 2.4.0
- * @category Util
- * @param {Array|string} path The path of the property to get.
- * @returns {Function} Returns the new accessor function.
- * @example
- *
- * var objects = [
- * { 'a': { 'b': 2 } },
- * { 'a': { 'b': 1 } }
- * ];
- *
- * _.map(objects, _.property('a.b'));
- * // => [2, 1]
- *
- * _.map(_.sortBy(objects, _.property(['a', 'b'])), 'a.b');
- * // => [1, 2]
- */
- function property(path) {
- return isKey(path) ? baseProperty(toKey(path)) : basePropertyDeep(path);
- }
- /**
- * The opposite of `_.property`; this method creates a function that returns
- * the value at a given path of `object`.
- *
- * @static
- * @memberOf _
- * @since 3.0.0
- * @category Util
- * @param {Object} object The object to query.
- * @returns {Function} Returns the new accessor function.
- * @example
- *
- * var array = [0, 1, 2],
- * object = { 'a': array, 'b': array, 'c': array };
- *
- * _.map(['a[2]', 'c[0]'], _.propertyOf(object));
- * // => [2, 0]
- *
- * _.map([['a', '2'], ['c', '0']], _.propertyOf(object));
- * // => [2, 0]
- */
- function propertyOf(object) {
- return function(path) {
- return object == null ? undefined : baseGet(object, path);
- };
- }
- /**
- * Creates an array of numbers (positive and/or negative) progressing from
- * `start` up to, but not including, `end`. A step of `-1` is used if a negative
- * `start` is specified without an `end` or `step`. If `end` is not specified,
- * it's set to `start` with `start` then set to `0`.
- *
- * **Note:** JavaScript follows the IEEE-754 standard for resolving
- * floating-point values which can produce unexpected results.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @param {number} [step=1] The value to increment or decrement by.
- * @returns {Array} Returns the range of numbers.
- * @see _.inRange, _.rangeRight
- * @example
- *
- * _.range(4);
- * // => [0, 1, 2, 3]
- *
- * _.range(-4);
- * // => [0, -1, -2, -3]
- *
- * _.range(1, 5);
- * // => [1, 2, 3, 4]
- *
- * _.range(0, 20, 5);
- * // => [0, 5, 10, 15]
- *
- * _.range(0, -4, -1);
- * // => [0, -1, -2, -3]
- *
- * _.range(1, 4, 0);
- * // => [1, 1, 1]
- *
- * _.range(0);
- * // => []
- */
- var range = createRange();
- /**
- * This method is like `_.range` except that it populates values in
- * descending order.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {number} [start=0] The start of the range.
- * @param {number} end The end of the range.
- * @param {number} [step=1] The value to increment or decrement by.
- * @returns {Array} Returns the range of numbers.
- * @see _.inRange, _.range
- * @example
- *
- * _.rangeRight(4);
- * // => [3, 2, 1, 0]
- *
- * _.rangeRight(-4);
- * // => [-3, -2, -1, 0]
- *
- * _.rangeRight(1, 5);
- * // => [4, 3, 2, 1]
- *
- * _.rangeRight(0, 20, 5);
- * // => [15, 10, 5, 0]
- *
- * _.rangeRight(0, -4, -1);
- * // => [-3, -2, -1, 0]
- *
- * _.rangeRight(1, 4, 0);
- * // => [1, 1, 1]
- *
- * _.rangeRight(0);
- * // => []
- */
- var rangeRight = createRange(true);
- /**
- * This method returns a new empty array.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {Array} Returns the new empty array.
- * @example
- *
- * var arrays = _.times(2, _.stubArray);
- *
- * console.log(arrays);
- * // => [[], []]
- *
- * console.log(arrays[0] === arrays[1]);
- * // => false
- */
- function stubArray() {
- return [];
- }
- /**
- * This method returns `false`.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {boolean} Returns `false`.
- * @example
- *
- * _.times(2, _.stubFalse);
- * // => [false, false]
- */
- function stubFalse() {
- return false;
- }
- /**
- * This method returns a new empty object.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {Object} Returns the new empty object.
- * @example
- *
- * var objects = _.times(2, _.stubObject);
- *
- * console.log(objects);
- * // => [{}, {}]
- *
- * console.log(objects[0] === objects[1]);
- * // => false
- */
- function stubObject() {
- return {};
- }
- /**
- * This method returns an empty string.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {string} Returns the empty string.
- * @example
- *
- * _.times(2, _.stubString);
- * // => ['', '']
- */
- function stubString() {
- return '';
- }
- /**
- * This method returns `true`.
- *
- * @static
- * @memberOf _
- * @since 4.13.0
- * @category Util
- * @returns {boolean} Returns `true`.
- * @example
- *
- * _.times(2, _.stubTrue);
- * // => [true, true]
- */
- function stubTrue() {
- return true;
- }
- /**
- * Invokes the iteratee `n` times, returning an array of the results of
- * each invocation. The iteratee is invoked with one argument; (index).
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {number} n The number of times to invoke `iteratee`.
- * @param {Function} [iteratee=_.identity] The function invoked per iteration.
- * @returns {Array} Returns the array of results.
- * @example
- *
- * _.times(3, String);
- * // => ['0', '1', '2']
- *
- * _.times(4, _.constant(0));
- * // => [0, 0, 0, 0]
- */
- function times(n, iteratee) {
- n = toInteger(n);
- if (n < 1 || n > MAX_SAFE_INTEGER) {
- return [];
- }
- var index = MAX_ARRAY_LENGTH,
- length = nativeMin(n, MAX_ARRAY_LENGTH);
- iteratee = getIteratee(iteratee);
- n -= MAX_ARRAY_LENGTH;
- var result = baseTimes(length, iteratee);
- while (++index < n) {
- iteratee(index);
- }
- return result;
- }
- /**
- * Converts `value` to a property path array.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Util
- * @param {*} value The value to convert.
- * @returns {Array} Returns the new property path array.
- * @example
- *
- * _.toPath('a.b.c');
- * // => ['a', 'b', 'c']
- *
- * _.toPath('a[0].b.c');
- * // => ['a', '0', 'b', 'c']
- */
- function toPath(value) {
- if (isArray(value)) {
- return arrayMap(value, toKey);
- }
- return isSymbol(value) ? [value] : copyArray(stringToPath(toString(value)));
- }
- /**
- * Generates a unique ID. If `prefix` is given, the ID is appended to it.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Util
- * @param {string} [prefix=''] The value to prefix the ID with.
- * @returns {string} Returns the unique ID.
- * @example
- *
- * _.uniqueId('contact_');
- * // => 'contact_104'
- *
- * _.uniqueId();
- * // => '105'
- */
- function uniqueId(prefix) {
- var id = ++idCounter;
- return toString(prefix) + id;
- }
- /*------------------------------------------------------------------------*/
- /**
- * Adds two numbers.
- *
- * @static
- * @memberOf _
- * @since 3.4.0
- * @category Math
- * @param {number} augend The first number in an addition.
- * @param {number} addend The second number in an addition.
- * @returns {number} Returns the total.
- * @example
- *
- * _.add(6, 4);
- * // => 10
- */
- var add = createMathOperation(function(augend, addend) {
- return augend + addend;
- }, 0);
- /**
- * Computes `number` rounded up to `precision`.
- *
- * @static
- * @memberOf _
- * @since 3.10.0
- * @category Math
- * @param {number} number The number to round up.
- * @param {number} [precision=0] The precision to round up to.
- * @returns {number} Returns the rounded up number.
- * @example
- *
- * _.ceil(4.006);
- * // => 5
- *
- * _.ceil(6.004, 2);
- * // => 6.01
- *
- * _.ceil(6040, -2);
- * // => 6100
- */
- var ceil = createRound('ceil');
- /**
- * Divide two numbers.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Math
- * @param {number} dividend The first number in a division.
- * @param {number} divisor The second number in a division.
- * @returns {number} Returns the quotient.
- * @example
- *
- * _.divide(6, 4);
- * // => 1.5
- */
- var divide = createMathOperation(function(dividend, divisor) {
- return dividend / divisor;
- }, 1);
- /**
- * Computes `number` rounded down to `precision`.
- *
- * @static
- * @memberOf _
- * @since 3.10.0
- * @category Math
- * @param {number} number The number to round down.
- * @param {number} [precision=0] The precision to round down to.
- * @returns {number} Returns the rounded down number.
- * @example
- *
- * _.floor(4.006);
- * // => 4
- *
- * _.floor(0.046, 2);
- * // => 0.04
- *
- * _.floor(4060, -2);
- * // => 4000
- */
- var floor = createRound('floor');
- /**
- * Computes the maximum value of `array`. If `array` is empty or falsey,
- * `undefined` is returned.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {*} Returns the maximum value.
- * @example
- *
- * _.max([4, 2, 8, 6]);
- * // => 8
- *
- * _.max([]);
- * // => undefined
- */
- function max(array) {
- return (array && array.length)
- ? baseExtremum(array, identity, baseGt)
- : undefined;
- }
- /**
- * This method is like `_.max` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * the value is ranked. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {*} Returns the maximum value.
- * @example
- *
- * var objects = [{ 'n': 1 }, { 'n': 2 }];
- *
- * _.maxBy(objects, function(o) { return o.n; });
- * // => { 'n': 2 }
- *
- * // The `_.property` iteratee shorthand.
- * _.maxBy(objects, 'n');
- * // => { 'n': 2 }
- */
- function maxBy(array, iteratee) {
- return (array && array.length)
- ? baseExtremum(array, getIteratee(iteratee, 2), baseGt)
- : undefined;
- }
- /**
- * Computes the mean of the values in `array`.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {number} Returns the mean.
- * @example
- *
- * _.mean([4, 2, 8, 6]);
- * // => 5
- */
- function mean(array) {
- return baseMean(array, identity);
- }
- /**
- * This method is like `_.mean` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the value to be averaged.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the mean.
- * @example
- *
- * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
- *
- * _.meanBy(objects, function(o) { return o.n; });
- * // => 5
- *
- * // The `_.property` iteratee shorthand.
- * _.meanBy(objects, 'n');
- * // => 5
- */
- function meanBy(array, iteratee) {
- return baseMean(array, getIteratee(iteratee, 2));
- }
- /**
- * Computes the minimum value of `array`. If `array` is empty or falsey,
- * `undefined` is returned.
- *
- * @static
- * @since 0.1.0
- * @memberOf _
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {*} Returns the minimum value.
- * @example
- *
- * _.min([4, 2, 8, 6]);
- * // => 2
- *
- * _.min([]);
- * // => undefined
- */
- function min(array) {
- return (array && array.length)
- ? baseExtremum(array, identity, baseLt)
- : undefined;
- }
- /**
- * This method is like `_.min` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the criterion by which
- * the value is ranked. The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {*} Returns the minimum value.
- * @example
- *
- * var objects = [{ 'n': 1 }, { 'n': 2 }];
- *
- * _.minBy(objects, function(o) { return o.n; });
- * // => { 'n': 1 }
- *
- * // The `_.property` iteratee shorthand.
- * _.minBy(objects, 'n');
- * // => { 'n': 1 }
- */
- function minBy(array, iteratee) {
- return (array && array.length)
- ? baseExtremum(array, getIteratee(iteratee, 2), baseLt)
- : undefined;
- }
- /**
- * Multiply two numbers.
- *
- * @static
- * @memberOf _
- * @since 4.7.0
- * @category Math
- * @param {number} multiplier The first number in a multiplication.
- * @param {number} multiplicand The second number in a multiplication.
- * @returns {number} Returns the product.
- * @example
- *
- * _.multiply(6, 4);
- * // => 24
- */
- var multiply = createMathOperation(function(multiplier, multiplicand) {
- return multiplier * multiplicand;
- }, 1);
- /**
- * Computes `number` rounded to `precision`.
- *
- * @static
- * @memberOf _
- * @since 3.10.0
- * @category Math
- * @param {number} number The number to round.
- * @param {number} [precision=0] The precision to round to.
- * @returns {number} Returns the rounded number.
- * @example
- *
- * _.round(4.006);
- * // => 4
- *
- * _.round(4.006, 2);
- * // => 4.01
- *
- * _.round(4060, -2);
- * // => 4100
- */
- var round = createRound('round');
- /**
- * Subtract two numbers.
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Math
- * @param {number} minuend The first number in a subtraction.
- * @param {number} subtrahend The second number in a subtraction.
- * @returns {number} Returns the difference.
- * @example
- *
- * _.subtract(6, 4);
- * // => 2
- */
- var subtract = createMathOperation(function(minuend, subtrahend) {
- return minuend - subtrahend;
- }, 0);
- /**
- * Computes the sum of the values in `array`.
- *
- * @static
- * @memberOf _
- * @since 3.4.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @returns {number} Returns the sum.
- * @example
- *
- * _.sum([4, 2, 8, 6]);
- * // => 20
- */
- function sum(array) {
- return (array && array.length)
- ? baseSum(array, identity)
- : 0;
- }
- /**
- * This method is like `_.sum` except that it accepts `iteratee` which is
- * invoked for each element in `array` to generate the value to be summed.
- * The iteratee is invoked with one argument: (value).
- *
- * @static
- * @memberOf _
- * @since 4.0.0
- * @category Math
- * @param {Array} array The array to iterate over.
- * @param {Function} [iteratee=_.identity] The iteratee invoked per element.
- * @returns {number} Returns the sum.
- * @example
- *
- * var objects = [{ 'n': 4 }, { 'n': 2 }, { 'n': 8 }, { 'n': 6 }];
- *
- * _.sumBy(objects, function(o) { return o.n; });
- * // => 20
- *
- * // The `_.property` iteratee shorthand.
- * _.sumBy(objects, 'n');
- * // => 20
- */
- function sumBy(array, iteratee) {
- return (array && array.length)
- ? baseSum(array, getIteratee(iteratee, 2))
- : 0;
- }
- /*------------------------------------------------------------------------*/
- // Add methods that return wrapped values in chain sequences.
- lodash.after = after;
- lodash.ary = ary;
- lodash.assign = assign;
- lodash.assignIn = assignIn;
- lodash.assignInWith = assignInWith;
- lodash.assignWith = assignWith;
- lodash.at = at;
- lodash.before = before;
- lodash.bind = bind;
- lodash.bindAll = bindAll;
- lodash.bindKey = bindKey;
- lodash.castArray = castArray;
- lodash.chain = chain;
- lodash.chunk = chunk;
- lodash.compact = compact;
- lodash.concat = concat;
- lodash.cond = cond;
- lodash.conforms = conforms;
- lodash.constant = constant;
- lodash.countBy = countBy;
- lodash.create = create;
- lodash.curry = curry;
- lodash.curryRight = curryRight;
- lodash.debounce = debounce;
- lodash.defaults = defaults;
- lodash.defaultsDeep = defaultsDeep;
- lodash.defer = defer;
- lodash.delay = delay;
- lodash.difference = difference;
- lodash.differenceBy = differenceBy;
- lodash.differenceWith = differenceWith;
- lodash.drop = drop;
- lodash.dropRight = dropRight;
- lodash.dropRightWhile = dropRightWhile;
- lodash.dropWhile = dropWhile;
- lodash.fill = fill;
- lodash.filter = filter;
- lodash.flatMap = flatMap;
- lodash.flatMapDeep = flatMapDeep;
- lodash.flatMapDepth = flatMapDepth;
- lodash.flatten = flatten;
- lodash.flattenDeep = flattenDeep;
- lodash.flattenDepth = flattenDepth;
- lodash.flip = flip;
- lodash.flow = flow;
- lodash.flowRight = flowRight;
- lodash.fromPairs = fromPairs;
- lodash.functions = functions;
- lodash.functionsIn = functionsIn;
- lodash.groupBy = groupBy;
- lodash.initial = initial;
- lodash.intersection = intersection;
- lodash.intersectionBy = intersectionBy;
- lodash.intersectionWith = intersectionWith;
- lodash.invert = invert;
- lodash.invertBy = invertBy;
- lodash.invokeMap = invokeMap;
- lodash.iteratee = iteratee;
- lodash.keyBy = keyBy;
- lodash.keys = keys;
- lodash.keysIn = keysIn;
- lodash.map = map;
- lodash.mapKeys = mapKeys;
- lodash.mapValues = mapValues;
- lodash.matches = matches;
- lodash.matchesProperty = matchesProperty;
- lodash.memoize = memoize;
- lodash.merge = merge;
- lodash.mergeWith = mergeWith;
- lodash.method = method;
- lodash.methodOf = methodOf;
- lodash.mixin = mixin;
- lodash.negate = negate;
- lodash.nthArg = nthArg;
- lodash.omit = omit;
- lodash.omitBy = omitBy;
- lodash.once = once;
- lodash.orderBy = orderBy;
- lodash.over = over;
- lodash.overArgs = overArgs;
- lodash.overEvery = overEvery;
- lodash.overSome = overSome;
- lodash.partial = partial;
- lodash.partialRight = partialRight;
- lodash.partition = partition;
- lodash.pick = pick;
- lodash.pickBy = pickBy;
- lodash.property = property;
- lodash.propertyOf = propertyOf;
- lodash.pull = pull;
- lodash.pullAll = pullAll;
- lodash.pullAllBy = pullAllBy;
- lodash.pullAllWith = pullAllWith;
- lodash.pullAt = pullAt;
- lodash.range = range;
- lodash.rangeRight = rangeRight;
- lodash.rearg = rearg;
- lodash.reject = reject;
- lodash.remove = remove;
- lodash.rest = rest;
- lodash.reverse = reverse;
- lodash.sampleSize = sampleSize;
- lodash.set = set;
- lodash.setWith = setWith;
- lodash.shuffle = shuffle;
- lodash.slice = slice;
- lodash.sortBy = sortBy;
- lodash.sortedUniq = sortedUniq;
- lodash.sortedUniqBy = sortedUniqBy;
- lodash.split = split;
- lodash.spread = spread;
- lodash.tail = tail;
- lodash.take = take;
- lodash.takeRight = takeRight;
- lodash.takeRightWhile = takeRightWhile;
- lodash.takeWhile = takeWhile;
- lodash.tap = tap;
- lodash.throttle = throttle;
- lodash.thru = thru;
- lodash.toArray = toArray;
- lodash.toPairs = toPairs;
- lodash.toPairsIn = toPairsIn;
- lodash.toPath = toPath;
- lodash.toPlainObject = toPlainObject;
- lodash.transform = transform;
- lodash.unary = unary;
- lodash.union = union;
- lodash.unionBy = unionBy;
- lodash.unionWith = unionWith;
- lodash.uniq = uniq;
- lodash.uniqBy = uniqBy;
- lodash.uniqWith = uniqWith;
- lodash.unset = unset;
- lodash.unzip = unzip;
- lodash.unzipWith = unzipWith;
- lodash.update = update;
- lodash.updateWith = updateWith;
- lodash.values = values;
- lodash.valuesIn = valuesIn;
- lodash.without = without;
- lodash.words = words;
- lodash.wrap = wrap;
- lodash.xor = xor;
- lodash.xorBy = xorBy;
- lodash.xorWith = xorWith;
- lodash.zip = zip;
- lodash.zipObject = zipObject;
- lodash.zipObjectDeep = zipObjectDeep;
- lodash.zipWith = zipWith;
- // Add aliases.
- lodash.entries = toPairs;
- lodash.entriesIn = toPairsIn;
- lodash.extend = assignIn;
- lodash.extendWith = assignInWith;
- // Add methods to `lodash.prototype`.
- mixin(lodash, lodash);
- /*------------------------------------------------------------------------*/
- // Add methods that return unwrapped values in chain sequences.
- lodash.add = add;
- lodash.attempt = attempt;
- lodash.camelCase = camelCase;
- lodash.capitalize = capitalize;
- lodash.ceil = ceil;
- lodash.clamp = clamp;
- lodash.clone = clone;
- lodash.cloneDeep = cloneDeep;
- lodash.cloneDeepWith = cloneDeepWith;
- lodash.cloneWith = cloneWith;
- lodash.conformsTo = conformsTo;
- lodash.deburr = deburr;
- lodash.defaultTo = defaultTo;
- lodash.divide = divide;
- lodash.endsWith = endsWith;
- lodash.eq = eq;
- lodash.escape = escape;
- lodash.escapeRegExp = escapeRegExp;
- lodash.every = every;
- lodash.find = find;
- lodash.findIndex = findIndex;
- lodash.findKey = findKey;
- lodash.findLast = findLast;
- lodash.findLastIndex = findLastIndex;
- lodash.findLastKey = findLastKey;
- lodash.floor = floor;
- lodash.forEach = forEach;
- lodash.forEachRight = forEachRight;
- lodash.forIn = forIn;
- lodash.forInRight = forInRight;
- lodash.forOwn = forOwn;
- lodash.forOwnRight = forOwnRight;
- lodash.get = get;
- lodash.gt = gt;
- lodash.gte = gte;
- lodash.has = has;
- lodash.hasIn = hasIn;
- lodash.head = head;
- lodash.identity = identity;
- lodash.includes = includes;
- lodash.indexOf = indexOf;
- lodash.inRange = inRange;
- lodash.invoke = invoke;
- lodash.isArguments = isArguments;
- lodash.isArray = isArray;
- lodash.isArrayBuffer = isArrayBuffer;
- lodash.isArrayLike = isArrayLike;
- lodash.isArrayLikeObject = isArrayLikeObject;
- lodash.isBoolean = isBoolean;
- lodash.isBuffer = isBuffer;
- lodash.isDate = isDate;
- lodash.isElement = isElement;
- lodash.isEmpty = isEmpty;
- lodash.isEqual = isEqual;
- lodash.isEqualWith = isEqualWith;
- lodash.isError = isError;
- lodash.isFinite = isFinite;
- lodash.isFunction = isFunction;
- lodash.isInteger = isInteger;
- lodash.isLength = isLength;
- lodash.isMap = isMap;
- lodash.isMatch = isMatch;
- lodash.isMatchWith = isMatchWith;
- lodash.isNaN = isNaN;
- lodash.isNative = isNative;
- lodash.isNil = isNil;
- lodash.isNull = isNull;
- lodash.isNumber = isNumber;
- lodash.isObject = isObject;
- lodash.isObjectLike = isObjectLike;
- lodash.isPlainObject = isPlainObject;
- lodash.isRegExp = isRegExp;
- lodash.isSafeInteger = isSafeInteger;
- lodash.isSet = isSet;
- lodash.isString = isString;
- lodash.isSymbol = isSymbol;
- lodash.isTypedArray = isTypedArray;
- lodash.isUndefined = isUndefined;
- lodash.isWeakMap = isWeakMap;
- lodash.isWeakSet = isWeakSet;
- lodash.join = join;
- lodash.kebabCase = kebabCase;
- lodash.last = last;
- lodash.lastIndexOf = lastIndexOf;
- lodash.lowerCase = lowerCase;
- lodash.lowerFirst = lowerFirst;
- lodash.lt = lt;
- lodash.lte = lte;
- lodash.max = max;
- lodash.maxBy = maxBy;
- lodash.mean = mean;
- lodash.meanBy = meanBy;
- lodash.min = min;
- lodash.minBy = minBy;
- lodash.stubArray = stubArray;
- lodash.stubFalse = stubFalse;
- lodash.stubObject = stubObject;
- lodash.stubString = stubString;
- lodash.stubTrue = stubTrue;
- lodash.multiply = multiply;
- lodash.nth = nth;
- lodash.noConflict = noConflict;
- lodash.noop = noop;
- lodash.now = now;
- lodash.pad = pad;
- lodash.padEnd = padEnd;
- lodash.padStart = padStart;
- lodash.parseInt = parseInt;
- lodash.random = random;
- lodash.reduce = reduce;
- lodash.reduceRight = reduceRight;
- lodash.repeat = repeat;
- lodash.replace = replace;
- lodash.result = result;
- lodash.round = round;
- lodash.runInContext = runInContext;
- lodash.sample = sample;
- lodash.size = size;
- lodash.snakeCase = snakeCase;
- lodash.some = some;
- lodash.sortedIndex = sortedIndex;
- lodash.sortedIndexBy = sortedIndexBy;
- lodash.sortedIndexOf = sortedIndexOf;
- lodash.sortedLastIndex = sortedLastIndex;
- lodash.sortedLastIndexBy = sortedLastIndexBy;
- lodash.sortedLastIndexOf = sortedLastIndexOf;
- lodash.startCase = startCase;
- lodash.startsWith = startsWith;
- lodash.subtract = subtract;
- lodash.sum = sum;
- lodash.sumBy = sumBy;
- lodash.template = template;
- lodash.times = times;
- lodash.toFinite = toFinite;
- lodash.toInteger = toInteger;
- lodash.toLength = toLength;
- lodash.toLower = toLower;
- lodash.toNumber = toNumber;
- lodash.toSafeInteger = toSafeInteger;
- lodash.toString = toString;
- lodash.toUpper = toUpper;
- lodash.trim = trim;
- lodash.trimEnd = trimEnd;
- lodash.trimStart = trimStart;
- lodash.truncate = truncate;
- lodash.unescape = unescape;
- lodash.uniqueId = uniqueId;
- lodash.upperCase = upperCase;
- lodash.upperFirst = upperFirst;
- // Add aliases.
- lodash.each = forEach;
- lodash.eachRight = forEachRight;
- lodash.first = head;
- mixin(lodash, (function() {
- var source = {};
- baseForOwn(lodash, function(func, methodName) {
- if (!hasOwnProperty.call(lodash.prototype, methodName)) {
- source[methodName] = func;
- }
- });
- return source;
- }()), { 'chain': false });
- /*------------------------------------------------------------------------*/
- /**
- * The semantic version number.
- *
- * @static
- * @memberOf _
- * @type {string}
- */
- lodash.VERSION = VERSION;
- // Assign default placeholders.
- arrayEach(['bind', 'bindKey', 'curry', 'curryRight', 'partial', 'partialRight'], function(methodName) {
- lodash[methodName].placeholder = lodash;
- });
- // Add `LazyWrapper` methods for `_.drop` and `_.take` variants.
- arrayEach(['drop', 'take'], function(methodName, index) {
- LazyWrapper.prototype[methodName] = function(n) {
- n = n === undefined ? 1 : nativeMax(toInteger(n), 0);
- var result = (this.__filtered__ && !index)
- ? new LazyWrapper(this)
- : this.clone();
- if (result.__filtered__) {
- result.__takeCount__ = nativeMin(n, result.__takeCount__);
- } else {
- result.__views__.push({
- 'size': nativeMin(n, MAX_ARRAY_LENGTH),
- 'type': methodName + (result.__dir__ < 0 ? 'Right' : '')
- });
- }
- return result;
- };
- LazyWrapper.prototype[methodName + 'Right'] = function(n) {
- return this.reverse()[methodName](n).reverse();
- };
- });
- // Add `LazyWrapper` methods that accept an `iteratee` value.
- arrayEach(['filter', 'map', 'takeWhile'], function(methodName, index) {
- var type = index + 1,
- isFilter = type == LAZY_FILTER_FLAG || type == LAZY_WHILE_FLAG;
- LazyWrapper.prototype[methodName] = function(iteratee) {
- var result = this.clone();
- result.__iteratees__.push({
- 'iteratee': getIteratee(iteratee, 3),
- 'type': type
- });
- result.__filtered__ = result.__filtered__ || isFilter;
- return result;
- };
- });
- // Add `LazyWrapper` methods for `_.head` and `_.last`.
- arrayEach(['head', 'last'], function(methodName, index) {
- var takeName = 'take' + (index ? 'Right' : '');
- LazyWrapper.prototype[methodName] = function() {
- return this[takeName](1).value()[0];
- };
- });
- // Add `LazyWrapper` methods for `_.initial` and `_.tail`.
- arrayEach(['initial', 'tail'], function(methodName, index) {
- var dropName = 'drop' + (index ? '' : 'Right');
- LazyWrapper.prototype[methodName] = function() {
- return this.__filtered__ ? new LazyWrapper(this) : this[dropName](1);
- };
- });
- LazyWrapper.prototype.compact = function() {
- return this.filter(identity);
- };
- LazyWrapper.prototype.find = function(predicate) {
- return this.filter(predicate).head();
- };
- LazyWrapper.prototype.findLast = function(predicate) {
- return this.reverse().find(predicate);
- };
- LazyWrapper.prototype.invokeMap = baseRest(function(path, args) {
- if (typeof path == 'function') {
- return new LazyWrapper(this);
- }
- return this.map(function(value) {
- return baseInvoke(value, path, args);
- });
- });
- LazyWrapper.prototype.reject = function(predicate) {
- return this.filter(negate(getIteratee(predicate)));
- };
- LazyWrapper.prototype.slice = function(start, end) {
- start = toInteger(start);
- var result = this;
- if (result.__filtered__ && (start > 0 || end < 0)) {
- return new LazyWrapper(result);
- }
- if (start < 0) {
- result = result.takeRight(-start);
- } else if (start) {
- result = result.drop(start);
- }
- if (end !== undefined) {
- end = toInteger(end);
- result = end < 0 ? result.dropRight(-end) : result.take(end - start);
- }
- return result;
- };
- LazyWrapper.prototype.takeRightWhile = function(predicate) {
- return this.reverse().takeWhile(predicate).reverse();
- };
- LazyWrapper.prototype.toArray = function() {
- return this.take(MAX_ARRAY_LENGTH);
- };
- // Add `LazyWrapper` methods to `lodash.prototype`.
- baseForOwn(LazyWrapper.prototype, function(func, methodName) {
- var checkIteratee = /^(?:filter|find|map|reject)|While$/.test(methodName),
- isTaker = /^(?:head|last)$/.test(methodName),
- lodashFunc = lodash[isTaker ? ('take' + (methodName == 'last' ? 'Right' : '')) : methodName],
- retUnwrapped = isTaker || /^find/.test(methodName);
- if (!lodashFunc) {
- return;
- }
- lodash.prototype[methodName] = function() {
- var value = this.__wrapped__,
- args = isTaker ? [1] : arguments,
- isLazy = value instanceof LazyWrapper,
- iteratee = args[0],
- useLazy = isLazy || isArray(value);
- var interceptor = function(value) {
- var result = lodashFunc.apply(lodash, arrayPush([value], args));
- return (isTaker && chainAll) ? result[0] : result;
- };
- if (useLazy && checkIteratee && typeof iteratee == 'function' && iteratee.length != 1) {
- // Avoid lazy use if the iteratee has a "length" value other than `1`.
- isLazy = useLazy = false;
- }
- var chainAll = this.__chain__,
- isHybrid = !!this.__actions__.length,
- isUnwrapped = retUnwrapped && !chainAll,
- onlyLazy = isLazy && !isHybrid;
- if (!retUnwrapped && useLazy) {
- value = onlyLazy ? value : new LazyWrapper(this);
- var result = func.apply(value, args);
- result.__actions__.push({ 'func': thru, 'args': [interceptor], 'thisArg': undefined });
- return new LodashWrapper(result, chainAll);
- }
- if (isUnwrapped && onlyLazy) {
- return func.apply(this, args);
- }
- result = this.thru(interceptor);
- return isUnwrapped ? (isTaker ? result.value()[0] : result.value()) : result;
- };
- });
- // Add `Array` methods to `lodash.prototype`.
- arrayEach(['pop', 'push', 'shift', 'sort', 'splice', 'unshift'], function(methodName) {
- var func = arrayProto[methodName],
- chainName = /^(?:push|sort|unshift)$/.test(methodName) ? 'tap' : 'thru',
- retUnwrapped = /^(?:pop|shift)$/.test(methodName);
- lodash.prototype[methodName] = function() {
- var args = arguments;
- if (retUnwrapped && !this.__chain__) {
- var value = this.value();
- return func.apply(isArray(value) ? value : [], args);
- }
- return this[chainName](function(value) {
- return func.apply(isArray(value) ? value : [], args);
- });
- };
- });
- // Map minified method names to their real names.
- baseForOwn(LazyWrapper.prototype, function(func, methodName) {
- var lodashFunc = lodash[methodName];
- if (lodashFunc) {
- var key = lodashFunc.name + '';
- if (!hasOwnProperty.call(realNames, key)) {
- realNames[key] = [];
- }
- realNames[key].push({ 'name': methodName, 'func': lodashFunc });
- }
- });
- realNames[createHybrid(undefined, WRAP_BIND_KEY_FLAG).name] = [{
- 'name': 'wrapper',
- 'func': undefined
- }];
- // Add methods to `LazyWrapper`.
- LazyWrapper.prototype.clone = lazyClone;
- LazyWrapper.prototype.reverse = lazyReverse;
- LazyWrapper.prototype.value = lazyValue;
- // Add chain sequence methods to the `lodash` wrapper.
- lodash.prototype.at = wrapperAt;
- lodash.prototype.chain = wrapperChain;
- lodash.prototype.commit = wrapperCommit;
- lodash.prototype.next = wrapperNext;
- lodash.prototype.plant = wrapperPlant;
- lodash.prototype.reverse = wrapperReverse;
- lodash.prototype.toJSON = lodash.prototype.valueOf = lodash.prototype.value = wrapperValue;
- // Add lazy aliases.
- lodash.prototype.first = lodash.prototype.head;
- if (symIterator) {
- lodash.prototype[symIterator] = wrapperToIterator;
- }
- return lodash;
- });
- /*--------------------------------------------------------------------------*/
- // Export lodash.
- var _ = runInContext();
- // Some AMD build optimizers, like r.js, check for condition patterns like:
- if (typeof define == 'function' && typeof define.amd == 'object' && define.amd) {
- // Expose Lodash on the global object to prevent errors when Lodash is
- // loaded by a script tag in the presence of an AMD loader.
- // See http://requirejs.org/docs/errors.html#mismatch for more details.
- // Use `_.noConflict` to remove Lodash from the global object.
- root._ = _;
- // Define as an anonymous module so, through path mapping, it can be
- // referenced as the "underscore" module.
- define(function() {
- return _;
- });
- }
- // Check for `exports` after `define` in case a build optimizer adds it.
- else if (freeModule) {
- // Export for Node.js.
- (freeModule.exports = _)._ = _;
- // Export for CommonJS support.
- freeExports._ = _;
- }
- else {
- // Export to the global object.
- root._ = _;
- }
- }.call(this));
- }).call(this,typeof global !== "undefined" ? global : typeof self !== "undefined" ? self : typeof window !== "undefined" ? window : {})
- },{}],13:[function(require,module,exports){
- // shim for using process in browser
- var process = module.exports = {};
- var queue = [];
- var draining = false;
- function drainQueue() {
- if (draining) {
- return;
- }
- draining = true;
- var currentQueue;
- var len = queue.length;
- while(len) {
- currentQueue = queue;
- queue = [];
- var i = -1;
- while (++i < len) {
- currentQueue[i]();
- }
- len = queue.length;
- }
- draining = false;
- }
- process.nextTick = function (fun) {
- queue.push(fun);
- if (!draining) {
- setTimeout(drainQueue, 0);
- }
- };
- process.title = 'browser';
- process.browser = true;
- process.env = {};
- process.argv = [];
- process.version = ''; // empty string to avoid regexp issues
- process.versions = {};
- function noop() {}
- process.on = noop;
- process.addListener = noop;
- process.once = noop;
- process.off = noop;
- process.removeListener = noop;
- process.removeAllListeners = noop;
- process.emit = noop;
- process.binding = function (name) {
- throw new Error('process.binding is not supported');
- };
- // TODO(shtylman)
- process.cwd = function () { return '/' };
- process.chdir = function (dir) {
- throw new Error('process.chdir is not supported');
- };
- process.umask = function() { return 0; };
- },{}],14:[function(require,module,exports){
- arguments[4][6][0].apply(exports,arguments)
- },{"dup":6}],15:[function(require,module,exports){
- arguments[4][7][0].apply(exports,arguments)
- },{"dup":7}],16:[function(require,module,exports){
- arguments[4][8][0].apply(exports,arguments)
- },{"./support/isBuffer":15,"_process":13,"dup":8,"inherits":14}],17:[function(require,module,exports){
- /*
- * Lexical analysis and token construction.
- */
- "use strict";
- var _ = require("lodash");
- var events = require("events");
- var reg = require("./reg.js");
- var state = require("./state.js").state;
- var unicodeData = require("../data/ascii-identifier-data.js");
- var asciiIdentifierStartTable = unicodeData.asciiIdentifierStartTable;
- var asciiIdentifierPartTable = unicodeData.asciiIdentifierPartTable;
- var nonAsciiIdentifierStartTable = require("../data/non-ascii-identifier-start.js");
- var nonAsciiIdentifierPartTable = require("../data/non-ascii-identifier-part-only.js");
- // Loading of this module is deferred as an optimization for ES2015 input
- var es5IdentifierNames;
- // Some of these token types are from JavaScript Parser API
- // while others are specific to JSHint parser.
- // JS Parser API: https://developer.mozilla.org/en-US/docs/SpiderMonkey/Parser_API
- var Token = {
- Identifier: 1,
- Punctuator: 2,
- NumericLiteral: 3,
- StringLiteral: 4,
- Comment: 5,
- Keyword: 6,
- RegExp: 9,
- TemplateHead: 10,
- TemplateMiddle: 11,
- TemplateTail: 12,
- NoSubstTemplate: 13
- };
- var Context = {
- Block: 1,
- Template: 2
- };
- function isHex(str) {
- return /^[0-9a-fA-F]+$/.test(str);
- }
- function isHexDigit(str) {
- return str.length === 1 && isHex(str);
- }
- // Object that handles postponed lexing verifications that checks the parsed
- // environment state.
- function asyncTrigger() {
- var _checks = [];
- return {
- push: function(fn) {
- _checks.push(fn);
- },
- check: function() {
- for (var check = 0; check < _checks.length; ++check) {
- _checks[check]();
- }
- _checks.splice(0, _checks.length);
- }
- };
- }
- /*
- * Lexer for JSHint.
- *
- * This object does a char-by-char scan of the provided source code
- * and produces a sequence of tokens.
- *
- * var lex = new Lexer("var i = 0;");
- * lex.start();
- * lex.token(); // returns the next token
- *
- * You have to use the token() method to move the lexer forward
- * but you don't have to use its return value to get tokens. In addition
- * to token() method returning the next token, the Lexer object also
- * emits events.
- *
- * lex.on("Identifier", function(data) {
- * if (data.name.indexOf("_") >= 0) {
- * // Produce a warning.
- * }
- * });
- *
- * Note that the token() method returns tokens in a JSLint-compatible
- * format while the event emitter uses a slightly modified version of
- * Mozilla's JavaScript Parser API. Eventually, we will move away from
- * JSLint format.
- */
- function Lexer(source) {
- var lines = source;
- if (typeof lines === "string") {
- lines = lines
- .replace(/\r\n/g, "\n")
- .replace(/\r/g, "\n")
- .split("\n");
- }
- // If the first line is a shebang (#!), make it a blank and move on.
- // Shebangs are used by Node scripts.
- if (lines[0] && lines[0].substr(0, 2) === "#!") {
- if (lines[0].indexOf("node") !== -1) {
- state.option.node = true;
- }
- lines[0] = "";
- }
- this.emitter = new events.EventEmitter();
- this.source = source;
- this.setLines(lines);
- this.prereg = true;
- this.line = 0;
- this.char = 1;
- this.from = 1;
- this.input = "";
- this.inComment = false;
- this.context = [];
- this.templateStarts = [];
- for (var i = 0; i < state.option.indent; i += 1) {
- state.tab += " ";
- }
- }
- Lexer.prototype = {
- _lines: [],
- inContext: function(ctxType) {
- return this.context.length > 0 && this.context[this.context.length - 1].type === ctxType;
- },
- pushContext: function(ctxType) {
- this.context.push({ type: ctxType });
- },
- popContext: function() {
- return this.context.pop();
- },
- currentContext: function() {
- return this.context.length > 0 && this.context[this.context.length - 1];
- },
- getLines: function() {
- this._lines = state.lines;
- return this._lines;
- },
- setLines: function(val) {
- this._lines = val;
- state.lines = this._lines;
- },
- /*
- * Return the next i character without actually moving the
- * char pointer.
- */
- peek: function(i) {
- return this.input.charAt(i || 0);
- },
- /*
- * Move the char pointer forward i times.
- */
- skip: function(i) {
- i = i || 1;
- this.char += i;
- this.input = this.input.slice(i);
- },
- /*
- * Subscribe to a token event. The API for this method is similar
- * Underscore.js i.e. you can subscribe to multiple events with
- * one call:
- *
- * lex.on("Identifier Number", function(data) {
- * // ...
- * });
- */
- on: function(names, listener) {
- names.split(" ").forEach(function(name) {
- this.emitter.on(name, listener);
- }.bind(this));
- },
- /*
- * Trigger a token event. All arguments will be passed to each
- * listener.
- */
- trigger: function() {
- this.emitter.emit.apply(this.emitter, Array.prototype.slice.call(arguments));
- },
- /*
- * Postpone a token event. the checking condition is set as
- * last parameter, and the trigger function is called in a
- * stored callback. To be later called using the check() function
- * by the parser. This avoids parser's peek() to give the lexer
- * a false context.
- */
- triggerAsync: function(type, args, checks, fn) {
- checks.push(function() {
- if (fn()) {
- this.trigger(type, args);
- }
- }.bind(this));
- },
- /*
- * Extract a punctuator out of the next sequence of characters
- * or return 'null' if its not possible.
- *
- * This method's implementation was heavily influenced by the
- * scanPunctuator function in the Esprima parser's source code.
- */
- scanPunctuator: function() {
- var ch1 = this.peek();
- var ch2, ch3, ch4;
- switch (ch1) {
- // Most common single-character punctuators
- case ".":
- if ((/^[0-9]$/).test(this.peek(1))) {
- return null;
- }
- if (this.peek(1) === "." && this.peek(2) === ".") {
- return {
- type: Token.Punctuator,
- value: "..."
- };
- }
- /* falls through */
- case "(":
- case ")":
- case ";":
- case ",":
- case "[":
- case "]":
- case ":":
- case "~":
- return {
- type: Token.Punctuator,
- value: ch1
- };
- // A block/object opener
- case "{":
- this.pushContext(Context.Block);
- return {
- type: Token.Punctuator,
- value: ch1
- };
- // A block/object closer
- case "}":
- if (this.inContext(Context.Block)) {
- this.popContext();
- }
- return {
- type: Token.Punctuator,
- value: ch1
- };
- // A pound sign (for Node shebangs)
- case "#":
- return {
- type: Token.Punctuator,
- value: ch1
- };
- // We're at the end of input
- case "":
- return null;
- }
- // Peek more characters
- ch2 = this.peek(1);
- ch3 = this.peek(2);
- if (ch1 === "?") {
- // Optional chaining
- if (ch2 === "." && !reg.decimalDigit.test(ch3)) {
- return {
- type: Token.Punctuator,
- value: "?."
- };
- }
- return {
- type: Token.Punctuator,
- value: ch2 === "?" ? "??" : "?"
- };
- }
- ch4 = this.peek(3);
- // 4-character punctuator: >>>=
- if (ch1 === ">" && ch2 === ">" && ch3 === ">" && ch4 === "=") {
- return {
- type: Token.Punctuator,
- value: ">>>="
- };
- }
- // 3-character punctuators: === !== >>> <<= >>=
- if (ch1 === "=" && ch2 === "=" && ch3 === "=") {
- return {
- type: Token.Punctuator,
- value: "==="
- };
- }
- if (ch1 === "!" && ch2 === "=" && ch3 === "=") {
- return {
- type: Token.Punctuator,
- value: "!=="
- };
- }
- if (ch1 === ">" && ch2 === ">" && ch3 === ">") {
- return {
- type: Token.Punctuator,
- value: ">>>"
- };
- }
- if (ch1 === "<" && ch2 === "<" && ch3 === "=") {
- return {
- type: Token.Punctuator,
- value: "<<="
- };
- }
- if (ch1 === ">" && ch2 === ">" && ch3 === "=") {
- return {
- type: Token.Punctuator,
- value: ">>="
- };
- }
- // Fat arrow punctuator
- if (ch1 === "=" && ch2 === ">") {
- return {
- type: Token.Punctuator,
- value: ch1 + ch2
- };
- }
- // 2-character punctuators: ++ -- << >> && || **
- if (ch1 === ch2 && ("+-<>&|*".indexOf(ch1) >= 0)) {
- if (ch1 === "*" && ch3 === "=") {
- return {
- type: Token.Punctuator,
- value: ch1 + ch2 + ch3
- };
- }
- return {
- type: Token.Punctuator,
- value: ch1 + ch2
- };
- }
- // <= >= != += -= *= %= &= |= ^= /=
- if ("<>=!+-*%&|^/".indexOf(ch1) >= 0) {
- if (ch2 === "=") {
- return {
- type: Token.Punctuator,
- value: ch1 + ch2
- };
- }
- return {
- type: Token.Punctuator,
- value: ch1
- };
- }
- return null;
- },
- /*
- * Extract a comment out of the next sequence of characters and/or
- * lines or return 'null' if its not possible. Since comments can
- * span across multiple lines this method has to move the char
- * pointer.
- *
- * In addition to normal JavaScript comments (// and /*) this method
- * also recognizes JSHint- and JSLint-specific comments such as
- * /*jshint, /*jslint, /*globals and so on.
- */
- scanComments: function(checks) {
- var ch1 = this.peek();
- var ch2 = this.peek(1);
- var rest = this.input.substr(2);
- var startLine = this.line;
- var startChar = this.char;
- var self = this;
- // Create a comment token object and make sure it
- // has all the data JSHint needs to work with special
- // comments.
- function commentToken(label, body, opt) {
- var special = [
- "jshint", "jshint.unstable", "jslint", "members", "member", "globals",
- "global", "exported"
- ];
- var isSpecial = false;
- var value = label + body;
- var commentType = "plain";
- opt = opt || {};
- if (opt.isMultiline) {
- value += "*/";
- }
- body = body.replace(/\n/g, " ");
- if (label === "/*" && reg.fallsThrough.test(body)) {
- isSpecial = true;
- commentType = "falls through";
- }
- special.forEach(function(str) {
- if (isSpecial) {
- return;
- }
- // Don't recognize any special comments other than jshint for single-line
- // comments. This introduced many problems with legit comments.
- if (label === "//" && str !== "jshint" && str !== "jshint.unstable") {
- return;
- }
- if (body.charAt(str.length) === " " && body.substr(0, str.length) === str) {
- isSpecial = true;
- label = label + str;
- body = body.substr(str.length);
- }
- if (!isSpecial && body.charAt(0) === " " && body.charAt(str.length + 1) === " " &&
- body.substr(1, str.length) === str) {
- isSpecial = true;
- label = label + " " + str;
- body = body.substr(str.length + 1);
- }
- // To handle rarer case when special word is separated from label by
- // multiple spaces or tabs
- var strIndex = body.indexOf(str);
- if (!isSpecial && strIndex >= 0 && body.charAt(strIndex + str.length) === " ") {
- var isAllWhitespace = body.substr(0, strIndex).trim().length === 0;
- if (isAllWhitespace) {
- isSpecial = true;
- body = body.substr(str.length + strIndex);
- }
- }
- if (!isSpecial) {
- return;
- }
- switch (str) {
- case "member":
- commentType = "members";
- break;
- case "global":
- commentType = "globals";
- break;
- default:
- var options = body.split(":").map(function(v) {
- return v.replace(/^\s+/, "").replace(/\s+$/, "");
- });
- if (options.length === 2) {
- switch (options[0]) {
- case "ignore":
- switch (options[1]) {
- case "start":
- self.ignoringLinterErrors = true;
- isSpecial = false;
- break;
- case "end":
- self.ignoringLinterErrors = false;
- isSpecial = false;
- break;
- }
- }
- }
- commentType = str;
- }
- });
- return {
- type: Token.Comment,
- commentType: commentType,
- value: value,
- body: body,
- isSpecial: isSpecial,
- isMalformed: opt.isMalformed || false
- };
- }
- // End of unbegun comment. Raise an error and skip that input.
- if (ch1 === "*" && ch2 === "/") {
- this.trigger("error", {
- code: "E018",
- line: startLine,
- character: startChar
- });
- this.skip(2);
- return null;
- }
- // Comments must start either with // or /*
- if (ch1 !== "/" || (ch2 !== "*" && ch2 !== "/")) {
- return null;
- }
- // One-line comment
- if (ch2 === "/") {
- this.skip(this.input.length); // Skip to the EOL.
- return commentToken("//", rest);
- }
- var body = "";
- /* Multi-line comment */
- if (ch2 === "*") {
- this.inComment = true;
- this.skip(2);
- while (this.peek() !== "*" || this.peek(1) !== "/") {
- if (this.peek() === "") { // End of Line
- body += "\n";
- // If we hit EOF and our comment is still unclosed,
- // trigger an error and end the comment implicitly.
- if (!this.nextLine(checks)) {
- this.trigger("error", {
- code: "E017",
- line: startLine,
- character: startChar
- });
- this.inComment = false;
- return commentToken("/*", body, {
- isMultiline: true,
- isMalformed: true
- });
- }
- } else {
- body += this.peek();
- this.skip();
- }
- }
- this.skip(2);
- this.inComment = false;
- return commentToken("/*", body, { isMultiline: true });
- }
- },
- /*
- * Extract a keyword out of the next sequence of characters or
- * return 'null' if its not possible.
- */
- scanKeyword: function() {
- var result = /^[a-zA-Z_$][a-zA-Z0-9_$]*/.exec(this.input);
- var keywords = [
- "if", "in", "do", "var", "for", "new",
- "try", "let", "this", "else", "case",
- "void", "with", "enum", "while", "break",
- "catch", "throw", "const", "yield", "class",
- "super", "return", "typeof", "delete",
- "switch", "export", "import", "default",
- "finally", "extends", "function", "continue",
- "debugger", "instanceof", "true", "false", "null", "async", "await"
- ];
- if (result && keywords.indexOf(result[0]) >= 0) {
- return {
- type: Token.Keyword,
- value: result[0]
- };
- }
- return null;
- },
- /*
- * Extract a JavaScript identifier out of the next sequence of
- * characters or return 'null' if its not possible.
- */
- scanIdentifier: function(checks) {
- var id = "";
- var index = 0;
- var char, value;
- function isNonAsciiIdentifierStart(code) {
- return nonAsciiIdentifierStartTable.indexOf(code) > -1;
- }
- function isNonAsciiIdentifierPart(code) {
- return isNonAsciiIdentifierStart(code) || nonAsciiIdentifierPartTable.indexOf(code) > -1;
- }
- var readUnicodeEscapeSequence = function() {
- /*jshint validthis:true */
- index += 1;
- if (this.peek(index) !== "u") {
- return null;
- }
- var sequence = this.peek(index + 1) + this.peek(index + 2) +
- this.peek(index + 3) + this.peek(index + 4);
- var code;
- if (isHex(sequence)) {
- code = parseInt(sequence, 16);
- if (asciiIdentifierPartTable[code] || isNonAsciiIdentifierPart(code)) {
- index += 5;
- return "\\u" + sequence;
- }
- return null;
- }
- return null;
- }.bind(this);
- var getIdentifierStart = function() {
- /*jshint validthis:true */
- var chr = this.peek(index);
- var code = chr.charCodeAt(0);
- if (code === 92) {
- return readUnicodeEscapeSequence();
- }
- if (code < 128) {
- if (asciiIdentifierStartTable[code]) {
- index += 1;
- return chr;
- }
- return null;
- }
- if (isNonAsciiIdentifierStart(code)) {
- index += 1;
- return chr;
- }
- return null;
- }.bind(this);
- var getIdentifierPart = function() {
- /*jshint validthis:true */
- var chr = this.peek(index);
- var code = chr.charCodeAt(0);
- if (code === 92) {
- return readUnicodeEscapeSequence();
- }
- if (code < 128) {
- if (asciiIdentifierPartTable[code]) {
- index += 1;
- return chr;
- }
- return null;
- }
- if (isNonAsciiIdentifierPart(code)) {
- index += 1;
- return chr;
- }
- return null;
- }.bind(this);
- function removeEscapeSequences(id) {
- return id.replace(/\\u([0-9a-fA-F]{4})/g, function(m0, codepoint) {
- return String.fromCharCode(parseInt(codepoint, 16));
- });
- }
- char = getIdentifierStart();
- if (char === null) {
- return null;
- }
- id = char;
- for (;;) {
- char = getIdentifierPart();
- if (char === null) {
- break;
- }
- id += char;
- }
- value = removeEscapeSequences(id);
- if (!state.inES6(true)) {
- es5IdentifierNames = require("../data/es5-identifier-names.js");
- if (!es5IdentifierNames.test(value)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: ["unicode 8", "6"]
- },
- checks,
- function() { return true; }
- );
- }
- }
- return {
- type: Token.Identifier,
- value: value,
- text: id,
- tokenLength: id.length
- };
- },
- /*
- * Extract a numeric literal out of the next sequence of
- * characters or return 'null' if its not possible. This method
- * supports all numeric literals described in section 7.8.3
- * of the EcmaScript 5 specification.
- *
- * This method's implementation was heavily influenced by the
- * scanNumericLiteral function in the Esprima parser's source code.
- */
- scanNumericLiteral: function(checks) {
- var index = 0;
- var value = "";
- var length = this.input.length;
- var char = this.peek(index);
- var isAllowedDigit = isDecimalDigit;
- var base = 10;
- var isLegacy = false;
- var isNonOctal = false;
- function isDecimalDigit(str) {
- return (/^[0-9]$/).test(str);
- }
- function isOctalDigit(str) {
- return (/^[0-7]$/).test(str);
- }
- function isNonOctalDigit(str) {
- return str === "8" || str === "9";
- }
- function isBinaryDigit(str) {
- return (/^[01]$/).test(str);
- }
- function isIdentifierStart(ch) {
- return (ch === "$") || (ch === "_") || (ch === "\\") ||
- (ch >= "a" && ch <= "z") || (ch >= "A" && ch <= "Z");
- }
- // Numbers must start either with a decimal digit or a point.
- if (char !== "." && !isDecimalDigit(char)) {
- return null;
- }
- if (char !== ".") {
- value = this.peek(index);
- index += 1;
- char = this.peek(index);
- if (value === "0") {
- // Base-16 numbers.
- if (char === "x" || char === "X") {
- isAllowedDigit = isHexDigit;
- base = 16;
- index += 1;
- value += char;
- }
- // Base-8 numbers.
- if (char === "o" || char === "O") {
- isAllowedDigit = isOctalDigit;
- base = 8;
- if (!state.inES6(true)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "Octal integer literal", "6" ]
- },
- checks,
- function() { return true; }
- );
- }
- index += 1;
- value += char;
- }
- // Base-2 numbers.
- if (char === "b" || char === "B") {
- isAllowedDigit = isBinaryDigit;
- base = 2;
- if (!state.inES6(true)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "Binary integer literal", "6" ]
- },
- checks,
- function() { return true; }
- );
- }
- index += 1;
- value += char;
- }
- // Legacy base-8 numbers.
- if (isOctalDigit(char)) {
- isAllowedDigit = isOctalDigit;
- base = 8;
- isLegacy = true;
- } else if (isDecimalDigit(char)) {
- isNonOctal = true;
- }
- }
- while (index < length) {
- char = this.peek(index);
- if (isLegacy && isNonOctalDigit(char)) {
- base = 10;
- isLegacy = false;
- isNonOctal = true;
- isAllowedDigit = isDecimalDigit;
- }
- if (!isAllowedDigit(char)) {
- break;
- }
- value += char;
- index += 1;
- }
- var isBigInt = this.peek(index) === 'n';
- if (isAllowedDigit !== isDecimalDigit || isBigInt) {
- if (isBigInt) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "BigInt", "11" ]
- },
- checks,
- function() { return !state.inES11(); }
- );
- if (isLegacy || isNonOctal) {
- this.triggerAsync(
- "error",
- {
- code: "E067",
- line: this.line,
- character: this.char,
- data: [value + char]
- },
- checks,
- function() { return true; }
- );
- }
- value += char;
- index += 1;
- } else if (!isLegacy && value.length <= 2) { // 0x
- return {
- type: Token.NumericLiteral,
- value: value,
- isMalformed: true
- };
- }
- if (index < length) {
- char = this.peek(index);
- if (isIdentifierStart(char)) {
- return null;
- }
- }
- return {
- type: Token.NumericLiteral,
- value: value,
- base: base,
- isLegacy: isLegacy,
- isMalformed: false
- };
- }
- }
- // Decimal digits.
- if (char === ".") {
- value += char;
- index += 1;
- while (index < length) {
- char = this.peek(index);
- if (!isDecimalDigit(char)) {
- break;
- }
- value += char;
- index += 1;
- }
- }
- // Exponent part.
- if (char === "e" || char === "E") {
- value += char;
- index += 1;
- char = this.peek(index);
- if (char === "+" || char === "-") {
- value += this.peek(index);
- index += 1;
- }
- char = this.peek(index);
- if (isDecimalDigit(char)) {
- value += char;
- index += 1;
- while (index < length) {
- char = this.peek(index);
- if (!isDecimalDigit(char)) {
- break;
- }
- value += char;
- index += 1;
- }
- } else {
- return null;
- }
- }
- if (index < length) {
- char = this.peek(index);
- if (isIdentifierStart(char)) {
- return null;
- }
- }
- // TODO: Extend this check to other numeric literals
- this.triggerAsync("warning", {
- code: "W045",
- line: this.line,
- character: this.char + value.length,
- data: [ value ]
- }, checks, function() { return !isFinite(value); });
- return {
- type: Token.NumericLiteral,
- value: value,
- base: base,
- isNonOctal: isNonOctal,
- isMalformed: false
- };
- },
- // Assumes previously parsed character was \ (=== '\\') and was not skipped.
- scanEscapeSequence: function(checks) {
- var allowNewLine = false;
- var jump = 1;
- this.skip();
- var char = this.peek();
- switch (char) {
- case "'":
- this.triggerAsync("warning", {
- code: "W114",
- line: this.line,
- character: this.char,
- data: [ "\\'" ]
- }, checks, function() {return state.jsonMode; });
- break;
- case "b":
- char = "\\b";
- break;
- case "f":
- char = "\\f";
- break;
- case "n":
- char = "\\n";
- break;
- case "r":
- char = "\\r";
- break;
- case "t":
- char = "\\t";
- break;
- case "0":
- char = "\\0";
- // Octal literals fail in strict mode.
- // Check if the number is between 00 and 07.
- var n = parseInt(this.peek(1), 10);
- this.triggerAsync("warning", {
- code: "W115",
- line: this.line,
- character: this.char
- }, checks,
- function() { return n >= 0 && n <= 7 && state.isStrict(); });
- break;
- case "1":
- case "2":
- case "3":
- case "4":
- case "5":
- case "6":
- case "7":
- char = "\\" + char;
- this.triggerAsync("warning", {
- code: "W115",
- line: this.line,
- character: this.char
- }, checks,
- function() { return state.isStrict(); });
- break;
- case "u":
- var sequence = this.input.substr(1, 4);
- var code = parseInt(sequence, 16);
- if (!isHex(sequence)) {
- // This condition unequivocally describes a syntax error.
- // TODO: Re-factor as an "error" (not a "warning").
- this.trigger("warning", {
- code: "W052",
- line: this.line,
- character: this.char,
- data: [ "u" + sequence ]
- });
- }
- char = String.fromCharCode(code);
- jump = 5;
- break;
- case "v":
- this.triggerAsync("warning", {
- code: "W114",
- line: this.line,
- character: this.char,
- data: [ "\\v" ]
- }, checks, function() { return state.jsonMode; });
- char = "\v";
- break;
- case "x":
- var x = parseInt(this.input.substr(1, 2), 16);
- this.triggerAsync("warning", {
- code: "W114",
- line: this.line,
- character: this.char,
- data: [ "\\x-" ]
- }, checks, function() { return state.jsonMode; });
- char = String.fromCharCode(x);
- jump = 3;
- break;
- case "\\":
- char = "\\\\";
- break;
- case "/":
- break;
- case "":
- allowNewLine = true;
- char = "";
- break;
- }
- return { char: char, jump: jump, allowNewLine: allowNewLine };
- },
- /*
- * Extract a template literal out of the next sequence of characters
- * and/or lines or return 'null' if its not possible. Since template
- * literals can span across multiple lines, this method has to move
- * the char pointer.
- */
- scanTemplateLiteral: function(checks) {
- var tokenType;
- var value = "";
- var ch;
- var startLine = this.line;
- var startChar = this.char;
- var depth = this.templateStarts.length;
- if (this.peek() === "`") {
- if (!state.inES6(true)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: ["template literal syntax", "6"]
- },
- checks,
- function() { return true; }
- );
- }
- // Template must start with a backtick.
- tokenType = Token.TemplateHead;
- this.templateStarts.push({ line: this.line, char: this.char });
- depth = this.templateStarts.length;
- this.skip(1);
- this.pushContext(Context.Template);
- } else if (this.inContext(Context.Template) && this.peek() === "}") {
- // If we're in a template context, and we have a '}', lex a TemplateMiddle.
- tokenType = Token.TemplateMiddle;
- } else {
- // Go lex something else.
- return null;
- }
- while (this.peek() !== "`") {
- while ((ch = this.peek()) === "") {
- value += "\n";
- if (!this.nextLine(checks)) {
- // Unclosed template literal --- point to the starting "`"
- var startPos = this.templateStarts.pop();
- this.trigger("error", {
- code: "E052",
- line: startPos.line,
- character: startPos.char
- });
- return {
- type: tokenType,
- value: value,
- startLine: startLine,
- startChar: startChar,
- isUnclosed: true,
- depth: depth,
- context: this.popContext()
- };
- }
- }
- if (ch === '$' && this.peek(1) === '{') {
- value += '${';
- this.skip(2);
- return {
- type: tokenType,
- value: value,
- startLine: startLine,
- startChar: startChar,
- isUnclosed: false,
- depth: depth,
- context: this.currentContext()
- };
- } else if (ch === '\\') {
- var escape = this.scanEscapeSequence(checks);
- value += escape.char;
- this.skip(escape.jump);
- } else if (ch !== '`') {
- // Otherwise, append the value and continue.
- value += ch;
- this.skip(1);
- }
- }
- // Final value is either NoSubstTemplate or TemplateTail
- tokenType = tokenType === Token.TemplateHead ? Token.NoSubstTemplate : Token.TemplateTail;
- this.skip(1);
- this.templateStarts.pop();
- return {
- type: tokenType,
- value: value,
- startLine: startLine,
- startChar: startChar,
- isUnclosed: false,
- depth: depth,
- context: this.popContext()
- };
- },
- /*
- * Extract a string out of the next sequence of characters and/or
- * lines or return 'null' if its not possible. Since strings can
- * span across multiple lines this method has to move the char
- * pointer.
- *
- * This method recognizes pseudo-multiline JavaScript strings:
- *
- * var str = "hello\
- * world";
- */
- scanStringLiteral: function(checks) {
- /*jshint loopfunc:true */
- var quote = this.peek();
- // String must start with a quote.
- if (quote !== "\"" && quote !== "'") {
- return null;
- }
- // In JSON strings must always use double quotes.
- this.triggerAsync("warning", {
- code: "W108",
- line: this.line,
- character: this.char // +1?
- }, checks, function() { return state.jsonMode && quote !== "\""; });
- var value = "";
- var startLine = this.line;
- var startChar = this.char;
- var allowNewLine = false;
- this.skip();
- while (this.peek() !== quote) {
- if (this.peek() === "") { // End Of Line
- // If an EOL is not preceded by a backslash, show a warning
- // and proceed like it was a legit multi-line string where
- // author simply forgot to escape the newline symbol.
- //
- // Another approach is to implicitly close a string on EOL
- // but it generates too many false positives.
- if (!allowNewLine) {
- // This condition unequivocally describes a syntax error.
- // TODO: Emit error E029 and remove W112.
- this.trigger("warning", {
- code: "W112",
- line: this.line,
- character: this.char
- });
- } else {
- allowNewLine = false;
- // Otherwise show a warning if multistr option was not set.
- // For JSON, show warning no matter what.
- this.triggerAsync("warning", {
- code: "W043",
- line: this.line,
- character: this.char
- }, checks, function() { return !state.option.multistr; });
- this.triggerAsync("warning", {
- code: "W042",
- line: this.line,
- character: this.char
- }, checks, function() { return state.jsonMode && state.option.multistr; });
- }
- // If we get an EOF inside of an unclosed string, show an
- // error and implicitly close it at the EOF point.
- if (!this.nextLine(checks)) {
- return {
- type: Token.StringLiteral,
- value: value,
- startLine: startLine,
- startChar: startChar,
- isUnclosed: true,
- quote: quote
- };
- }
- } else { // Any character other than End Of Line
- allowNewLine = false;
- var char = this.peek();
- var jump = 1; // A length of a jump, after we're done
- // parsing this character.
- if (char < " ") {
- // Warn about a control character in a string.
- this.triggerAsync(
- "warning",
- {
- code: "W113",
- line: this.line,
- character: this.char,
- data: [ "<non-printable>" ]
- },
- checks,
- function() { return true; }
- );
- }
- // Special treatment for some escaped characters.
- if (char === "\\") {
- var parsed = this.scanEscapeSequence(checks);
- char = parsed.char;
- jump = parsed.jump;
- allowNewLine = parsed.allowNewLine;
- }
- // If char is the empty string, end of the line has been reached. In
- // this case, `this.char` should not be incremented so that warnings
- // and errors reported in the subsequent loop iteration have the
- // correct character column offset.
- if (char !== "") {
- value += char;
- this.skip(jump);
- }
- }
- }
- this.skip();
- return {
- type: Token.StringLiteral,
- value: value,
- startLine: startLine,
- startChar: startChar,
- isUnclosed: false,
- quote: quote
- };
- },
- /*
- * Extract a regular expression out of the next sequence of
- * characters and/or lines or return 'null' if its not possible.
- *
- * This method is platform dependent: it accepts almost any
- * regular expression values but then tries to compile and run
- * them using system's RegExp object. This means that there are
- * rare edge cases where one JavaScript engine complains about
- * your regular expression while others don't.
- */
- scanRegExp: function(checks) {
- var index = 0;
- var length = this.input.length;
- var char = this.peek();
- var value = char;
- var body = "";
- var groupReferences = [];
- var allFlags = "";
- var es5Flags = "";
- var malformed = false;
- var isCharSet = false;
- var isCharSetRange = false;
- var isGroup = false;
- var isQuantifiable = false;
- var hasInvalidQuantifier = false;
- var escapedChars = "";
- var hasUFlag = function() { return allFlags.indexOf("u") > -1; };
- var escapeSequence;
- var groupCount = 0;
- var terminated, malformedDesc;
- var scanRegexpEscapeSequence = function() {
- var next, sequence;
- index += 1;
- char = this.peek(index);
- if (reg.nonzeroDigit.test(char)) {
- sequence = char;
- next = this.peek(index + 1);
- while (reg.nonzeroDigit.test(next) || next === "0") {
- index += 1;
- char = next;
- sequence += char;
- body += char;
- value += char;
- next = this.peek(index + 1);
- }
- groupReferences.push(Number(sequence));
- return sequence;
- }
- escapedChars += char;
- if (char === "u" && this.peek(index + 1) === "{") {
- var x = index + 2;
- sequence = "u{";
- next = this.peek(x);
- while (isHex(next)) {
- sequence += next;
- x += 1;
- next = this.peek(x);
- }
- if (next !== "}") {
- this.triggerAsync(
- "error",
- {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ "Invalid Unicode escape sequence" ]
- },
- checks,
- hasUFlag
- );
- } else if (sequence.length > 2) {
- sequence += "}";
- body += sequence;
- value += sequence;
- index = x + 1;
- return sequence;
- }
- }
- if (char === "p" || char === "P") {
- var y = index + 2;
- sequence = "";
- next = "";
- if (this.peek(index + 1) === "{") {
- next = this.peek(y);
- while (next && next !== "}") {
- sequence += next;
- y += 1;
- next = this.peek(y);
- }
- }
- // Module loading is intentionally deferred as an optimization for
- // Node.js users who do not use Unicode escape sequences.
- if (!sequence || !require("./validate-unicode-escape-sequence")(sequence)) {
- this.triggerAsync(
- "error",
- {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ "Invalid Unicode property escape sequence" ]
- },
- checks,
- hasUFlag
- );
- }
- if (sequence) {
- sequence = char + "{" + sequence + "}";
- body += sequence;
- value += sequence;
- index = y + 1;
- if (!state.inES9()) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "Unicode property escape", "9" ]
- },
- checks,
- hasUFlag
- );
- }
- return sequence;
- }
- }
- // Unexpected control character
- if (char < " ") {
- malformed = true;
- this.triggerAsync(
- "warning",
- {
- code: "W048",
- line: this.line,
- character: this.char
- },
- checks,
- function() { return true; }
- );
- }
- // Unexpected escaped character
- if (char === "<") {
- malformed = true;
- this.triggerAsync(
- "warning",
- {
- code: "W049",
- line: this.line,
- character: this.char,
- data: [ char ]
- },
- checks,
- function() { return true; }
- );
- } else if (char === "0" && reg.decimalDigit.test(this.peek(index + 1))) {
- this.triggerAsync(
- "error",
- {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ "Invalid decimal escape sequence" ]
- },
- checks,
- hasUFlag
- );
- }
- index += 1;
- body += char;
- value += char;
- return char;
- }.bind(this);
- var checkQuantifier = function() {
- var lookahead = index;
- var lowerBound = "";
- var upperBound = "";
- var next;
- next = this.peek(lookahead + 1);
- while (reg.decimalDigit.test(next)) {
- lookahead += 1;
- lowerBound += next;
- next = this.peek(lookahead + 1);
- }
- if (!lowerBound) {
- return false;
- }
- if (next === "}") {
- return true;
- }
- if (next !== ",") {
- return false;
- }
- lookahead += 1;
- next = this.peek(lookahead + 1);
- while (reg.decimalDigit.test(next)) {
- lookahead += 1;
- upperBound += next;
- next = this.peek(lookahead + 1);
- }
- if (next !== "}") {
- return false;
- }
- if (upperBound) {
- return Number(lowerBound) <= Number(upperBound);
- }
- return true;
- }.bind(this);
- var translateUFlag = function(body) {
- // The BMP character to use as a replacement for astral symbols when
- // translating an ES6 "u"-flagged pattern to an ES5-compatible
- // approximation.
- // Note: replacing with '\uFFFF' enables false positives in unlikely
- // scenarios. For example, `[\u{1044f}-\u{10440}]` is an invalid pattern
- // that would not be detected by this substitution.
- var astralSubstitute = "\uFFFF";
- return body
- // Replace every Unicode escape sequence with the equivalent BMP
- // character or a constant ASCII code point in the case of astral
- // symbols. (See the above note on `astralSubstitute` for more
- // information.)
- .replace(/\\u\{([0-9a-fA-F]+)\}|\\u([a-fA-F0-9]{4})/g, function($0, $1, $2) {
- var codePoint = parseInt($1 || $2, 16);
- var literal;
- if (codePoint > 0x10FFFF) {
- malformed = true;
- this.trigger("error", {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ char ]
- });
- return;
- }
- literal = String.fromCharCode(codePoint);
- if (reg.regexpSyntaxChars.test(literal)) {
- return $0;
- }
- if (codePoint <= 0xFFFF) {
- return String.fromCharCode(codePoint);
- }
- return astralSubstitute;
- }.bind(this))
- // Replace each paired surrogate with a single ASCII symbol to avoid
- // throwing on regular expressions that are only valid in combination
- // with the "u" flag.
- .replace(
- /[\uD800-\uDBFF][\uDC00-\uDFFF]/g,
- astralSubstitute
- );
- }.bind(this);
- // Regular expressions must start with '/'
- if (!this.prereg || char !== "/") {
- return null;
- }
- index += 1;
- terminated = false;
- // Try to get everything in between slashes. A couple of
- // cases aside (see scanRegexpEscapeSequence) we don't really
- // care whether the resulting expression is valid or not.
- // We will check that later using the RegExp object.
- while (index < length) {
- // Because an iteration of this loop may terminate in a number of
- // distinct locations, `isCharSetRange` is re-set at the onset of
- // iteration.
- isCharSetRange &= char === "-";
- char = this.peek(index);
- value += char;
- body += char;
- if (isCharSet) {
- if (char === "]") {
- if (this.peek(index - 1) !== "\\" || this.peek(index - 2) === "\\") {
- isCharSet = false;
- }
- } else if (char === "-") {
- isCharSetRange = true;
- }
- }
- if (char === "\\") {
- escapeSequence = scanRegexpEscapeSequence();
- if (isCharSet && (this.peek(index) === "-" || isCharSetRange) &&
- reg.regexpCharClasses.test(escapeSequence)) {
- this.triggerAsync(
- "error",
- {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ "Character class used in range" ]
- },
- checks,
- hasUFlag
- );
- }
- continue;
- }
- if (isCharSet) {
- index += 1;
- continue;
- }
- if (char === "{" && !hasInvalidQuantifier) {
- hasInvalidQuantifier = !checkQuantifier();
- }
- if (char === "[") {
- isCharSet = true;
- index += 1;
- continue;
- } else if (char === "(") {
- isGroup = true;
- if (this.peek(index + 1) === "?" &&
- (this.peek(index + 2) === "=" || this.peek(index + 2) === "!")) {
- isQuantifiable = true;
- }
- } else if (char === ")") {
- if (isQuantifiable) {
- isQuantifiable = false;
- if (reg.regexpQuantifiers.test(this.peek(index + 1))) {
- this.triggerAsync(
- "error",
- {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ "Quantified quantifiable" ]
- },
- checks,
- hasUFlag
- );
- }
- } else {
- groupCount += 1;
- }
- isGroup = false;
- } else if (char === "/") {
- body = body.substr(0, body.length - 1);
- terminated = true;
- index += 1;
- break;
- }
- index += 1;
- }
- // A regular expression that was never closed is an
- // error from which we cannot recover.
- if (!terminated) {
- this.trigger("error", {
- code: "E015",
- line: this.line,
- character: this.from
- });
- return void this.trigger("fatal", {
- line: this.line,
- from: this.from
- });
- }
- // Parse flags (if any).
- while (index < length) {
- char = this.peek(index);
- if (!/[gimyus]/.test(char)) {
- break;
- }
- if (char === "y") {
- if (!state.inES6(true)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "Sticky RegExp flag", "6" ]
- },
- checks,
- function() { return true; }
- );
- }
- } else if (char === "u") {
- if (!state.inES6(true)) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "Unicode RegExp flag", "6" ]
- },
- checks,
- function() { return true; }
- );
- }
- var hasInvalidEscape = (function(groupReferences, groupCount, escapedChars, reg) {
- var hasInvalidGroup = groupReferences.some(function(groupReference) {
- if (groupReference > groupCount) {
- return true;
- }
- });
- if (hasInvalidGroup) {
- return true;
- }
- return !escapedChars.split("").every(function(escapedChar) {
- return escapedChar === "u" ||
- escapedChar === "/" ||
- escapedChar === "0" ||
- reg.regexpControlEscapes.test(escapedChar) ||
- reg.regexpCharClasses.test(escapedChar) ||
- reg.regexpSyntaxChars.test(escapedChar);
- });
- }(groupReferences, groupCount, escapedChars, reg));
- if (hasInvalidEscape) {
- malformedDesc = "Invalid escape";
- } else if (hasInvalidQuantifier) {
- malformedDesc = "Invalid quantifier";
- }
- body = translateUFlag(body);
- } else if (char === "s") {
- if (!state.inES9()) {
- this.triggerAsync(
- "warning",
- {
- code: "W119",
- line: this.line,
- character: this.char,
- data: [ "DotAll RegExp flag", "9" ]
- },
- checks,
- function() { return true; }
- );
- }
- if (value.indexOf("s") > -1) {
- malformedDesc = "Duplicate RegExp flag";
- }
- } else {
- es5Flags += char;
- }
- if (allFlags.indexOf(char) > -1) {
- malformedDesc = "Duplicate RegExp flag";
- }
- allFlags += char;
- value += char;
- allFlags += char;
- index += 1;
- }
- if (allFlags.indexOf("u") === -1) {
- this.triggerAsync("warning", {
- code: "W147",
- line: this.line,
- character: this.char
- }, checks, function() { return state.option.regexpu; });
- }
- // Check regular expression for correctness.
- try {
- new RegExp(body, es5Flags);
- } catch (err) {
- /**
- * Because JSHint relies on the current engine's RegExp parser to
- * validate RegExp literals, the description (exposed as the "data"
- * property on the error object) is platform dependent.
- */
- malformedDesc = err.message;
- }
- if (malformedDesc) {
- malformed = true;
- this.trigger("error", {
- code: "E016",
- line: this.line,
- character: this.char,
- data: [ malformedDesc ]
- });
- } else if (allFlags.indexOf("s") > -1 && !reg.regexpDot.test(body)) {
- this.trigger("warning", {
- code: "W148",
- line: this.line,
- character: this.char
- });
- }
- return {
- type: Token.RegExp,
- value: value,
- isMalformed: malformed
- };
- },
- /*
- * Scan for any occurrence of non-breaking spaces. Non-breaking spaces
- * can be mistakenly typed on OS X with option-space. Non UTF-8 web
- * pages with non-breaking pages produce syntax errors.
- */
- scanNonBreakingSpaces: function() {
- return state.option.nonbsp ?
- this.input.search(/(\u00A0)/) : -1;
- },
- /*
- * Produce the next raw token or return 'null' if no tokens can be matched.
- * This method skips over all space characters.
- */
- next: function(checks) {
- this.from = this.char;
- // Move to the next non-space character.
- while (reg.whitespace.test(this.peek())) {
- this.from += 1;
- this.skip();
- }
- // Methods that work with multi-line structures and move the
- // character pointer.
- var match = this.scanComments(checks) ||
- this.scanStringLiteral(checks) ||
- this.scanTemplateLiteral(checks);
- if (match) {
- return match;
- }
- // Methods that don't move the character pointer.
- match =
- this.scanRegExp(checks) ||
- this.scanPunctuator() ||
- this.scanKeyword() ||
- this.scanIdentifier(checks) ||
- this.scanNumericLiteral(checks);
- if (match) {
- this.skip(match.tokenLength || match.value.length);
- return match;
- }
- // No token could be matched, give up.
- return null;
- },
- /*
- * Switch to the next line and reset all char pointers. Once
- * switched, this method also checks for other minor warnings.
- */
- nextLine: function(checks) {
- var char;
- if (this.line >= this.getLines().length) {
- return false;
- }
- this.input = this.getLines()[this.line];
- this.line += 1;
- this.char = 1;
- this.from = 1;
- var inputTrimmed = this.input.trim();
- var startsWith = function() {
- return _.some(arguments, function(prefix) {
- return inputTrimmed.indexOf(prefix) === 0;
- });
- };
- var endsWith = function() {
- return _.some(arguments, function(suffix) {
- return inputTrimmed.indexOf(suffix, inputTrimmed.length - suffix.length) !== -1;
- });
- };
- // If we are ignoring linter errors, replace the input with empty string
- // if it doesn't already at least start or end a multi-line comment
- if (this.ignoringLinterErrors === true) {
- if (!startsWith("/*", "//") && !(this.inComment && endsWith("*/"))) {
- this.input = "";
- }
- }
- char = this.scanNonBreakingSpaces();
- if (char >= 0) {
- this.triggerAsync(
- "warning",
- { code: "W125", line: this.line, character: char + 1 },
- checks,
- function() { return true; }
- );
- }
- this.input = this.input.replace(/\t/g, state.tab);
- // If there is a limit on line length, warn when lines get too
- // long.
- if (!this.ignoringLinterErrors && state.option.maxlen &&
- state.option.maxlen < this.input.length) {
- var inComment = this.inComment ||
- startsWith.call(inputTrimmed, "//") ||
- startsWith.call(inputTrimmed, "/*");
- var shouldTriggerError = !inComment || !reg.maxlenException.test(inputTrimmed);
- if (shouldTriggerError) {
- this.triggerAsync(
- "warning",
- { code: "W101", line: this.line, character: this.input.length },
- checks,
- function() { return true; }
- );
- }
- }
- return true;
- },
- /*
- * Produce the next token. This function is called by advance() to get
- * the next token. It returns a token in a JSLint-compatible format.
- */
- token: function() {
- /*jshint loopfunc:true */
- var checks = asyncTrigger();
- var token;
- // Produce a token object.
- var create = function(type, value, isProperty, token) {
- /*jshint validthis:true */
- var obj;
- if (type !== "(endline)" && type !== "(end)") {
- this.prereg = false;
- }
- if (type === "(punctuator)") {
- switch (value) {
- case ".":
- case ")":
- case "~":
- case "#":
- case "]":
- case "}":
- case "++":
- case "--":
- this.prereg = false;
- break;
- default:
- this.prereg = true;
- }
- obj = Object.create(state.syntax[value] || state.syntax["(error)"]);
- }
- if (type === "(identifier)") {
- if (value === "return" || value === "case" || value === "yield" ||
- value === "typeof" || value === "instanceof" || value === "void" ||
- value === "await" || value === "new" || value === "delete" ||
- value === "default" || value === "extends") {
- this.prereg = true;
- }
- if (_.has(state.syntax, value)) {
- obj = Object.create(state.syntax[value] || state.syntax["(error)"]);
- }
- }
- if (type === "(template)" || type === "(template middle)") {
- this.prereg = true;
- }
- if (!obj) {
- obj = Object.create(state.syntax[type]);
- }
- obj.identifier = (type === "(identifier)");
- obj.type = obj.type || type;
- obj.value = value;
- obj.line = this.line;
- obj.character = this.char;
- obj.from = this.from;
- if (obj.identifier && token) obj.raw_text = token.text || token.value;
- if (token && token.startLine && token.startLine !== this.line) {
- obj.startLine = token.startLine;
- }
- if (token && token.context) {
- // Context of current token
- obj.context = token.context;
- }
- if (token && token.depth) {
- // Nested template depth
- obj.depth = token.depth;
- }
- if (token && token.isUnclosed) {
- // Mark token as unclosed string / template literal
- obj.isUnclosed = token.isUnclosed;
- }
- if (isProperty && obj.identifier) {
- obj.isProperty = isProperty;
- }
- obj.check = checks.check;
- return obj;
- }.bind(this);
- for (;;) {
- if (!this.input.length) {
- if (this.nextLine(checks)) {
- return create("(endline)", "");
- }
- if (this.exhausted) {
- return null;
- }
- this.exhausted = true;
- return create("(end)", "");
- }
- token = this.next(checks);
- if (!token) {
- if (this.input.length) {
- // Unexpected character.
- this.trigger("error", {
- code: "E024",
- line: this.line,
- character: this.char,
- data: [ this.peek() ]
- });
- this.input = "";
- }
- continue;
- }
- switch (token.type) {
- case Token.StringLiteral:
- this.triggerAsync("String", {
- line: this.line,
- char: this.char,
- from: this.from,
- startLine: token.startLine,
- startChar: token.startChar,
- value: token.value,
- quote: token.quote
- }, checks, function() { return true; });
- return create("(string)", token.value, null, token);
- case Token.TemplateHead:
- this.trigger("TemplateHead", {
- line: this.line,
- char: this.char,
- from: this.from,
- startLine: token.startLine,
- startChar: token.startChar,
- value: token.value
- });
- return create("(template)", token.value, null, token);
- case Token.TemplateMiddle:
- this.trigger("TemplateMiddle", {
- line: this.line,
- char: this.char,
- from: this.from,
- startLine: token.startLine,
- startChar: token.startChar,
- value: token.value
- });
- return create("(template middle)", token.value, null, token);
- case Token.TemplateTail:
- this.trigger("TemplateTail", {
- line: this.line,
- char: this.char,
- from: this.from,
- startLine: token.startLine,
- startChar: token.startChar,
- value: token.value
- });
- return create("(template tail)", token.value, null, token);
- case Token.NoSubstTemplate:
- this.trigger("NoSubstTemplate", {
- line: this.line,
- char: this.char,
- from: this.from,
- startLine: token.startLine,
- startChar: token.startChar,
- value: token.value
- });
- return create("(no subst template)", token.value, null, token);
- case Token.Identifier:
- this.triggerAsync("Identifier", {
- line: this.line,
- char: this.char,
- from: this.from,
- name: token.value,
- raw_name: token.text,
- isProperty: state.tokens.curr.id === "."
- }, checks, function() { return true; });
- /* falls through */
- case Token.Keyword:
- return create("(identifier)", token.value, state.tokens.curr.id === ".", token);
- case Token.NumericLiteral:
- if (token.isMalformed) {
- this.trigger("error", {
- code: "E067",
- line: this.line,
- character: this.char,
- data: [ token.value ]
- });
- }
- this.triggerAsync("warning", {
- code: "W114",
- line: this.line,
- character: this.char,
- data: [ "0x-" ]
- }, checks, function() { return token.base === 16 && state.jsonMode; });
- this.triggerAsync("warning", {
- code: "W115",
- line: this.line,
- character: this.char
- }, checks, function() {
- return state.isStrict() && token.base === 8 && token.isLegacy;
- });
- this.triggerAsync("error", {
- code: "E068",
- line: this.line,
- character: this.char
- }, checks, function() {
- return state.isStrict() && token.isNonOctal;
- });
- this.trigger("Number", {
- line: this.line,
- char: this.char,
- from: this.from,
- value: token.value,
- base: token.base,
- isMalformed: token.isMalformed
- });
- return create("(number)", token.value);
- case Token.RegExp:
- return create("(regexp)", token.value);
- case Token.Comment:
- if (token.isSpecial) {
- return {
- id: '(comment)',
- value: token.value,
- body: token.body,
- type: token.commentType,
- isSpecial: token.isSpecial,
- line: this.line,
- character: this.char,
- from: this.from
- };
- }
- break;
- default:
- return create("(punctuator)", token.value);
- }
- }
- }
- };
- exports.Lexer = Lexer;
- exports.Context = Context;
- },{"../data/ascii-identifier-data.js":1,"../data/es5-identifier-names.js":2,"../data/non-ascii-identifier-part-only.js":3,"../data/non-ascii-identifier-start.js":4,"./reg.js":22,"./state.js":24,"./validate-unicode-escape-sequence":26,"events":11,"lodash":12}],18:[function(require,module,exports){
- "use strict";
- var _ = require("lodash");
- var errors = {
- // JSHint options
- E001: "Bad {a}option: '{b}'.",
- E002: "Bad option value.",
- // JSHint input
- E003: "Expected a JSON value.",
- E004: "Input is neither a string nor an array of strings.",
- E005: "Input is empty.",
- E006: "Unexpected early end of program.",
- // Strict mode
- E007: "Missing \"use strict\" statement.",
- E008: "Strict violation.",
- E009: "Option 'validthis' can't be used in a global scope.",
- E010: "'with' is not allowed in strict mode.",
- // Constants
- E011: "'{a}' has already been declared.",
- E012: "const '{a}' is initialized to 'undefined'.",
- E013: "Attempting to override '{a}' which is a constant.",
- // Regular expressions
- E014: "A regular expression literal can be confused with '/='.",
- E015: "Unclosed regular expression.",
- E016: "Invalid regular expression.",
- // Tokens
- E017: "Unclosed comment.",
- E018: "Unbegun comment.",
- E019: "Unmatched '{a}'.",
- E020: "Expected '{a}' to match '{b}' from line {c} and instead saw '{d}'.",
- E021: "Expected '{a}' and instead saw '{b}'.",
- E022: "Line breaking error '{a}'.",
- E023: "Missing '{a}'.",
- E024: "Unexpected '{a}'.",
- E025: "Missing ':' on a case clause.",
- E026: "Missing '}' to match '{' from line {a}.",
- E027: "Missing ']' to match '[' from line {a}.",
- E028: "Illegal comma.",
- E029: "Unclosed string.",
- // Everything else
- E030: "Expected an identifier and instead saw '{a}'.",
- E031: "Bad assignment.", // FIXME: Rephrase
- E032: "Expected a small integer or 'false' and instead saw '{a}'.",
- E033: "Expected an operator and instead saw '{a}'.",
- E034: "get/set are ES5 features.",
- E035: "Missing property name.",
- E036: "Expected to see a statement and instead saw a block.",
- E037: null,
- E038: null,
- E039: "Function declarations are not invocable. Wrap the whole function invocation in parens.",
- E040: "Each value should have its own case label.",
- E041: "Unrecoverable syntax error.",
- E042: "Stopping.",
- E043: "Too many errors.",
- E044: null,
- E045: "Invalid for each loop.",
- E046: "Yield expressions may only occur within generator functions.",
- E047: null,
- E048: "{a} declaration not directly within block.",
- E049: "A {a} cannot be named '{b}'.",
- E050: "Mozilla requires the yield expression to be parenthesized here.",
- E051: null,
- E052: "Unclosed template literal.",
- E053: "{a} declarations are only allowed at the top level of module scope.",
- E054: "Class properties must be methods. Expected '(' but instead saw '{a}'.",
- E055: "The '{a}' option cannot be set after any executable code.",
- E056: "'{a}' was used before it was declared, which is illegal for '{b}' variables.",
- E057: "Invalid meta property: '{a}.{b}'.",
- E058: "Missing semicolon.",
- E059: "Incompatible values for the '{a}' and '{b}' linting options.",
- E060: "Non-callable values cannot be used as the second operand to instanceof.",
- E061: "Invalid position for 'yield' expression (consider wrapping in parenthesis).",
- E062: "Rest parameter does not a support default value.",
- E063: "Super property may only be used within method bodies.",
- E064: "Super call may only be used within class method bodies.",
- E065: "Functions defined outside of strict mode with non-simple parameter lists may not " +
- "enable strict mode.",
- E066: "Asynchronous iteration is only available with for-of loops.",
- E067: "Malformed numeric literal: '{a}'.",
- E068: "Decimals with leading zeros are not allowed in strict mode.",
- E069: "Duplicate exported binding: '{a}'.",
- E070: "import.meta may only be used in module code."
- };
- var warnings = {
- W001: "'hasOwnProperty' is a really bad name.",
- W002: "Value of '{a}' may be overwritten in IE 8 and earlier.",
- W003: "'{a}' was used before it was defined.",
- W004: "'{a}' is already defined.",
- W005: "A dot following a number can be confused with a decimal point.",
- W006: "Confusing minuses.",
- W007: "Confusing plusses.",
- W008: "A leading decimal point can be confused with a dot: '{a}'.",
- W009: "The array literal notation [] is preferable.",
- W010: "The object literal notation {} is preferable.",
- W011: null,
- W012: null,
- W013: null,
- W014: "Misleading line break before '{a}'; readers may interpret this as an expression boundary.",
- W015: null,
- W016: "Unexpected use of '{a}'.",
- W017: "Bad operand.",
- W018: "Confusing use of '{a}'.",
- W019: "Use the isNaN function to compare with NaN.",
- W020: "Read only.",
- W021: "Reassignment of '{a}', which is a {b}. " +
- "Use 'var' or 'let' to declare bindings that may change.",
- W022: "Do not assign to the exception parameter.",
- W023: null,
- W024: "Expected an identifier and instead saw '{a}' (a reserved word).",
- W025: "Missing name in function declaration.",
- W026: "Inner functions should be listed at the top of the outer function.",
- W027: "Unreachable '{a}' after '{b}'.",
- W028: "Label '{a}' on {b} statement.",
- W030: "Expected an assignment or function call and instead saw an expression.",
- W031: "Do not use 'new' for side effects.",
- W032: "Unnecessary semicolon.",
- W033: "Missing semicolon.",
- W034: "Unnecessary directive \"{a}\".",
- W035: "Empty block.",
- W036: "Unexpected /*member '{a}'.",
- W037: "'{a}' is a statement label.",
- W038: "'{a}' used out of scope.",
- W039: null,
- W040: "If a strict mode function is executed using function invocation, " +
- "its 'this' value will be undefined.",
- W041: null,
- W042: "Avoid EOL escaping.",
- W043: "Bad escaping of EOL. Use option multistr if needed.",
- W044: "Bad or unnecessary escaping.", /* TODO(caitp): remove W044 */
- W045: "Value described by numeric literal cannot be accurately " +
- "represented with a number value: '{a}'.",
- W046: "Don't use extra leading zeros '{a}'.",
- W047: "A trailing decimal point can be confused with a dot: '{a}'.",
- W048: "Unexpected control character in regular expression.",
- W049: "Unexpected escaped character '{a}' in regular expression.",
- W050: "JavaScript URL.",
- W051: "Variables should not be deleted.",
- W052: "Unexpected '{a}'.",
- W053: "Do not use {a} as a constructor.",
- W054: "The Function constructor is a form of eval.",
- W055: "A constructor name should start with an uppercase letter.",
- W056: "Bad constructor.",
- W057: "Weird construction. Is 'new' necessary?",
- W058: "Missing '()' invoking a constructor.",
- W059: "Avoid arguments.{a}.",
- W060: "document.write can be a form of eval.",
- W061: "eval can be harmful.",
- W062: "Wrap an immediate function invocation in parens " +
- "to assist the reader in understanding that the expression " +
- "is the result of a function, and not the function itself.",
- W063: "Math is not a function.",
- W064: "Missing 'new' prefix when invoking a constructor.",
- W065: "Missing radix parameter.",
- W066: "Implied eval. Consider passing a function instead of a string.",
- W067: "Unorthodox function invocation.",
- W068: "Wrapping non-IIFE function literals in parens is unnecessary.",
- W069: "['{a}'] is better written in dot notation.",
- W070: "Extra comma. (it breaks older versions of IE)",
- W071: "This function has too many statements. ({a})",
- W072: "This function has too many parameters. ({a})",
- W073: "Blocks are nested too deeply. ({a})",
- W074: "This function's cyclomatic complexity is too high. ({a})",
- W075: "Duplicate {a} '{b}'.",
- W076: "Unexpected parameter '{a}' in get {b} function.",
- W077: "Expected a single parameter in set {a} function.",
- W078: "Setter is defined without getter.",
- W079: "Redefinition of '{a}'.",
- W080: "It's not necessary to initialize '{a}' to 'undefined'.",
- W081: null,
- W082: "Function declarations should not be placed in blocks. " +
- "Use a function expression or move the statement to the top of " +
- "the outer function.",
- W083: "Functions declared within loops referencing an outer scoped " +
- "variable may lead to confusing semantics. ({a})",
- W084: "Expected a conditional expression and instead saw an assignment.",
- W085: "Don't use 'with'.",
- W086: "Expected a 'break' statement before '{a}'.",
- W087: "Forgotten 'debugger' statement?",
- W088: "Creating global 'for' variable. Should be 'for (var {a} ...'.",
- W089: "The body of a for in should be wrapped in an if statement to filter " +
- "unwanted properties from the prototype.",
- W090: "'{a}' is not a statement label.",
- W091: null,
- W093: "Did you mean to return a conditional instead of an assignment?",
- W094: "Unexpected comma.",
- W095: "Expected a string and instead saw {a}.",
- W096: "The '{a}' key may produce unexpected results.",
- W097: "Use the function form of \"use strict\".",
- W098: "'{a}' is defined but never used.",
- W099: null,
- W100: null,
- W101: "Line is too long.",
- W102: null,
- W103: "The '{a}' property is deprecated.",
- W104: "'{a}' is available in ES{b} (use 'esversion: {b}') or Mozilla JS extensions (use moz).",
- W105: null,
- W106: "Identifier '{a}' is not in camel case.",
- W107: "Script URL.",
- W108: "Strings must use doublequote.",
- W109: "Strings must use singlequote.",
- W110: "Mixed double and single quotes.",
- W112: "Unclosed string.",
- W113: "Control character in string: {a}.",
- W114: "Avoid {a}.",
- W115: "Octal literals are not allowed in strict mode.",
- W116: "Expected '{a}' and instead saw '{b}'.",
- W117: "'{a}' is not defined.",
- W118: "'{a}' is only available in Mozilla JavaScript extensions (use moz option).",
- W119: "'{a}' is only available in ES{b} (use 'esversion: {b}').",
- W120: "You might be leaking a variable ({a}) here.",
- W121: "Extending prototype of native object: '{a}'.",
- W122: "Invalid typeof value '{a}'",
- W123: "'{a}' is already defined in outer scope.",
- W124: "A generator function should contain at least one yield expression.",
- W125: "This line contains non-breaking spaces: http://jshint.com/docs/options/#nonbsp",
- W126: "Unnecessary grouping operator.",
- W127: "Unexpected use of a comma operator.",
- W128: "Empty array elements require elision=true.",
- W129: "'{a}' is defined in a future version of JavaScript. Use a " +
- "different variable name to avoid migration issues.",
- W130: "Invalid element after rest element.",
- W131: "Invalid parameter after rest parameter.",
- W132: "`var` declarations are forbidden. Use `let` or `const` instead.",
- W133: "Invalid for-{a} loop left-hand-side: {b}.",
- W134: "The '{a}' option is only available when linting ECMAScript {b} code.",
- W135: "{a} may not be supported by non-browser environments.",
- W136: "'{a}' must be in function scope.",
- W137: "Empty destructuring: this is unnecessary and can be removed.",
- W138: "Regular parameters should not come after default parameters.",
- W139: "Function expressions should not be used as the second operand to instanceof.",
- W140: "Missing comma.",
- W141: "Empty {a}: this is unnecessary and can be removed.",
- W142: "Empty {a}: consider replacing with `import '{b}';`.",
- W143: "Assignment to properties of a mapped arguments object may cause " +
- "unexpected changes to formal parameters.",
- W144: "'{a}' is a non-standard language feature. Enable it using the '{b}' unstable option.",
- W145: "Superfluous 'case' clause.",
- W146: "Unnecessary `await` expression.",
- W147: "Regular expressions should include the 'u' flag.",
- W148: "Unnecessary RegExp 's' flag."
- };
- var info = {
- I001: "Comma warnings can be turned off with 'laxcomma'.",
- I002: null,
- I003: "ES5 option is now set per default"
- };
- exports.errors = {};
- exports.warnings = {};
- exports.info = {};
- _.each(errors, function(desc, code) {
- exports.errors[code] = { code: code, desc: desc };
- });
- _.each(warnings, function(desc, code) {
- exports.warnings[code] = { code: code, desc: desc };
- });
- _.each(info, function(desc, code) {
- exports.info[code] = { code: code, desc: desc };
- });
- },{"lodash":12}],19:[function(require,module,exports){
- /**
- * The NameStack class is used to approximate function name inference as
- * introduced by ECMAScript 2015. In that edition, the `name` property of
- * function objects is set according to the function's syntactic form. For
- * certain forms, this value depends on values available to the runtime during
- * execution. For example:
- *
- * var fnName = function() {};
- *
- * In the program code above, the function object's `name` property is set to
- * `"fnName"` during execution.
- *
- * This general "name inference" behavior extends to a number of additional
- * syntactic forms, not all of which can be implemented statically. `NameStack`
- * is a support class representing a "best-effort" attempt to implement the
- * specified behavior in cases where this may be done statically.
- *
- * For more information on this behavior, see the following blog post:
- * https://bocoup.com/blog/whats-in-a-function-name
- */
- "use strict";
- function NameStack() {
- this._stack = [];
- }
- Object.defineProperty(NameStack.prototype, "length", {
- get: function() {
- return this._stack.length;
- }
- });
- /**
- * Create a new entry in the stack. Useful for tracking names across
- * expressions.
- */
- NameStack.prototype.push = function() {
- this._stack.push(null);
- };
- /**
- * Discard the most recently-created name on the stack.
- */
- NameStack.prototype.pop = function() {
- this._stack.pop();
- };
- /**
- * Update the most recent name on the top of the stack.
- *
- * @param {object} token The token to consider as the source for the most
- * recent name.
- */
- NameStack.prototype.set = function(token) {
- this._stack[this.length - 1] = token;
- };
- /**
- * Generate a string representation of the most recent name.
- *
- * @returns {string}
- */
- NameStack.prototype.infer = function() {
- var nameToken = this._stack[this.length - 1];
- var prefix = "";
- var type;
- // During expected operation, the topmost entry on the stack will only
- // reflect the current function's name when the function is declared without
- // the `function` keyword (i.e. for in-line accessor methods). In other
- // cases, the `function` expression itself will introduce an empty entry on
- // the top of the stack, and this should be ignored.
- if (!nameToken || nameToken.type === "class") {
- nameToken = this._stack[this.length - 2];
- }
- if (!nameToken) {
- return "(empty)";
- }
- type = nameToken.type;
- if (type !== "(string)" && type !== "(number)" && type !== "(identifier)" && type !== "default") {
- return "(expression)";
- }
- if (nameToken.accessorType) {
- prefix = nameToken.accessorType + " ";
- }
- return prefix + nameToken.value;
- };
- module.exports = NameStack;
- },{}],20:[function(require,module,exports){
- "use strict";
- // These are the JSHint boolean options.
- exports.bool = {
- enforcing: {
- /**
- * This option prohibits the use of bitwise operators such as `^` (XOR),
- * `|` (OR) and others. Bitwise operators are very rare in JavaScript
- * programs and quite often `&` is simply a mistyped `&&`.
- */
- bitwise : true,
- /**
- *
- * This options prohibits overwriting prototypes of native objects such as
- * `Array`, `Date` and so on.
- *
- * // jshint freeze:true
- * Array.prototype.count = function (value) { return 4; };
- * // -> Warning: Extending prototype of native object: 'Array'.
- */
- freeze : true,
- /**
- * This option allows you to force all variable names to use either
- * camelCase style or UPPER_CASE with underscores.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- camelcase : true,
- /**
- * This option requires you to always put curly braces around blocks in
- * loops and conditionals. JavaScript allows you to omit curly braces when
- * the block consists of only one statement, for example:
- *
- * while (day)
- * shuffle();
- *
- * However, in some circumstances, it can lead to bugs (you'd think that
- * `sleep()` is a part of the loop while in reality it is not):
- *
- * while (day)
- * shuffle();
- * sleep();
- */
- curly : true,
- /**
- * This options prohibits the use of `==` and `!=` in favor of `===` and
- * `!==`. The former try to coerce values before comparing them which can
- * lead to some unexpected results. The latter don't do any coercion so
- * they are generally safer. If you would like to learn more about type
- * coercion in JavaScript, we recommend [Truth, Equality and
- * JavaScript](http://javascriptweblog.wordpress.com/2011/02/07/truth-equality-and-javascript/)
- * by Angus Croll.
- */
- eqeqeq : true,
- /**
- * This option enables warnings about the use of identifiers which are
- * defined in future versions of JavaScript. Although overwriting them has
- * no effect in contexts where they are not implemented, this practice can
- * cause issues when migrating codebases to newer versions of the language.
- */
- futurehostile: true,
- /**
- * This option tells JSHint that your code needs to adhere to ECMAScript 3
- * specification. Use this option if you need your program to be executable
- * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
- * JavaScript environments.
- *
- * @deprecated Use `esversion: 3` instead.
- */
- es3 : true,
- /**
- * This option enables syntax first defined in [the ECMAScript 5.1
- * specification](http://es5.github.io/). This includes allowing reserved
- * keywords as object properties.
- *
- * @deprecated Use `esversion: 5` instead.
- */
- es5 : true,
- /**
- * This option requires all `for in` loops to filter object's items. The
- * for in statement allows for looping through the names of all of the
- * properties of an object including those inherited through the prototype
- * chain. This behavior can lead to unexpected items in your object so it
- * is generally safer to always filter inherited properties out as shown in
- * the example:
- *
- * for (key in obj) {
- * if (obj.hasOwnProperty(key)) {
- * // We are sure that obj[key] belongs to the object and was not inherited.
- * }
- * }
- *
- * For more in-depth understanding of `for in` loops in JavaScript, read
- * [Exploring JavaScript for-in
- * loops](http://javascriptweblog.wordpress.com/2011/01/04/exploring-javascript-for-in-loops/)
- * by Angus Croll.
- */
- forin : true,
- /**
- * This option prohibits the use of immediate function invocations without
- * wrapping them in parentheses. Wrapping parentheses assists readers of
- * your code in understanding that the expression is the result of a
- * function, and not the function itself.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- immed : true,
- /**
- * This option prohibits unnecessary clauses within `switch` statements,
- * e.g.
- *
- * switch (x) {
- * case 1:
- * default:
- * z();
- * }
- *
- * While clauses like these are techincally valid, they do not effect
- * program behavior and may indicate an erroneous refactoring.
- */
- leanswitch : true,
- /**
- * This option requires you to capitalize names of constructor functions.
- * Capitalizing functions that are intended to be used with `new` operator
- * is just a convention that helps programmers to visually distinguish
- * constructor functions from other types of functions to help spot
- * mistakes when using `this`.
- *
- * Not doing so won't break your code in any browsers or environments but
- * it will be a bit harder to figure out—by reading the code—if the
- * function was supposed to be used with or without new. And this is
- * important because when the function that was intended to be used with
- * `new` is used without it, `this` will point to the global object instead
- * of a new object.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- newcap : true,
- /**
- * This option prohibits the use of `arguments.caller` and
- * `arguments.callee`. Both `.caller` and `.callee` make quite a few
- * optimizations impossible so they were deprecated in future versions of
- * JavaScript. In fact, ECMAScript 5 forbids the use of `arguments.callee`
- * in strict mode.
- */
- noarg : true,
- /**
- * This option prohibits the use of the comma operator. When misused, the
- * comma operator can obscure the value of a statement and promote
- * incorrect code.
- */
- nocomma : true,
- /**
- * This option warns when you have an empty block in your code. JSLint was
- * originally warning for all empty blocks and we simply made it optional.
- * There were no studies reporting that empty blocks in JavaScript break
- * your code in any way.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- noempty : true,
- /**
- * This option warns about "non-breaking whitespace" characters. These
- * characters can be entered with option-space on Mac computers and have a
- * potential of breaking non-UTF8 web pages.
- */
- nonbsp : true,
- /**
- * This option prohibits the use of constructor functions for side-effects.
- * Some people like to call constructor functions without assigning its
- * result to any variable:
- *
- * new MyConstructor();
- *
- * There is no advantage in this approach over simply calling
- * `MyConstructor` since the object that the operator `new` creates isn't
- * used anywhere so you should generally avoid constructors like this one.
- */
- nonew : true,
- /**
- * Async functions resolve on their return value. In most cases, this makes
- * returning the result of an AwaitExpression (which is itself a Promise
- * instance) unnecessary. For clarity, it's often preferable to return the
- * result of the asynchronous operation directly. The notable exception is
- * within the `try` clause of a TryStatement--for more, see "await vs
- * return vs return await":
- *
- * https://jakearchibald.com/2017/await-vs-return-vs-return-await/
- */
- noreturnawait: true,
- /**
- * This option enables warnings for regular expressions which do not
- * include the "u" flag. The "u" flag extends support for Unicode and also
- * enables more strict parsing rules. JSHint will enforce these rules even
- * if it is executed in a JavaScript engine which does not support the "u"
- * flag.
- */
- regexpu : true,
- /**
- * This option prohibits the use of explicitly undeclared variables. This
- * option is very useful for spotting leaking and mistyped variables.
- *
- * // jshint undef:true
- *
- * function test() {
- * var myVar = 'Hello, World';
- * console.log(myvar); // Oops, typoed here. JSHint with undef will complain
- * }
- *
- * If your variable is defined in another file, you can use the `global`
- * directive to tell JSHint about it.
- */
- undef : true,
- /**
- * This option prohibits the use of the grouping operator when it is not
- * strictly required. Such usage commonly reflects a misunderstanding of
- * unary operators, for example:
- *
- * // jshint singleGroups: true
- *
- * delete(obj.attr); // Warning: Unnecessary grouping operator.
- */
- singleGroups: false,
- /**
- * When set to true, the use of VariableStatements are forbidden.
- * For example:
- *
- * // jshint varstmt: true
- *
- * var a; // Warning: `var` declarations are forbidden. Use `let` or `const` instead.
- */
- varstmt: false,
- /**
- * This option is a short hand for the most strict JSHint configuration as
- * available in JSHint version 2.6.3. It enables all enforcing options and
- * disables all relaxing options that were defined in that release.
- *
- * @deprecated The option cannot be maintained without automatically opting
- * users in to new features. This can lead to unexpected
- * warnings/errors in when upgrading between minor versions of
- * JSHint.
- */
- enforceall : false,
- /**
- * This option warns when a comma is not placed after the last element in an
- * array or object literal. Due to bugs in old versions of IE, trailing
- * commas used to be discouraged, but since ES5 their semantics were
- * standardized. (See
- * [#11.1.4](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.4) and
- * [#11.1.5](http://www.ecma-international.org/ecma-262/5.1/#sec-11.1.5).)
- * Now, they help to prevent the same [visual
- * ambiguities](http://www.ecma-international.org/ecma-262/5.1/#sec-7.9.2)
- * that the strict usage of semicolons helps prevent.
- *
- * For example, this code might have worked last Tuesday:
- *
- * [
- * b + c
- * ].forEach(print);
- *
- * But if one adds an element to the array and forgets to compensate for the
- * missing comma, no syntax error is thrown, and a linter cannot determine
- * if this was a mistake or an intentional function invocation.
- *
- * [
- * b + c
- * (d + e)
- * ].forEach(print);
- *
- * If one always appends a list item with a comma, this ambiguity cannot
- * occur:
- *
- * [
- * b + c,
- * ].forEach(print);
- *
- * [
- * b + c,
- * (d + e),
- * ].forEach(print);
- */
- trailingcomma: false
- },
- relaxing: {
- /**
- * This option suppresses warnings about missing semicolons. There is a lot
- * of FUD about semicolon spread by quite a few people in the community.
- * The common myths are that semicolons are required all the time (they are
- * not) and that they are unreliable. JavaScript has rules about semicolons
- * which are followed by *all* browsers so it is up to you to decide
- * whether you should or should not use semicolons in your code.
- *
- * For more information about semicolons in JavaScript read [An Open Letter
- * to JavaScript Leaders Regarding
- * Semicolons](http://blog.izs.me/post/2353458699/an-open-letter-to-javascript-leaders-regarding)
- * by Isaac Schlueter and [JavaScript Semicolon
- * Insertion](http://inimino.org/~inimino/blog/javascript_semicolons).
- */
- asi : true,
- /**
- * This option suppresses warnings about multi-line strings. Multi-line
- * strings can be dangerous in JavaScript because all hell breaks loose if
- * you accidentally put a whitespace in between the escape character (`\`)
- * and a new line.
- *
- * Note that even though this option allows correct multi-line strings, it
- * still warns about multi-line strings without escape characters or with
- * anything in between the escape character and a whitespace.
- *
- * // jshint multistr:true
- *
- * var text = "Hello\
- * World"; // All good.
- *
- * text = "Hello
- * World"; // Warning, no escape character.
- *
- * text = "Hello\
- * World"; // Warning, there is a space after \
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- multistr : true,
- /**
- * This option suppresses warnings about the `debugger` statements in your
- * code.
- */
- debug : true,
- /**
- * This option suppresses warnings about the use of assignments in cases
- * where comparisons are expected. More often than not, code like `if (a =
- * 10) {}` is a typo. However, it can be useful in cases like this one:
- *
- * for (var i = 0, person; person = people[i]; i++) {}
- *
- * You can silence this error on a per-use basis by surrounding the assignment
- * with parenthesis, such as:
- *
- * for (var i = 0, person; (person = people[i]); i++) {}
- */
- boss : true,
- /**
- * This option suppresses warnings about the use of `eval`. The use of
- * `eval` is discouraged because it can make your code vulnerable to
- * various injection attacks and it makes it hard for JavaScript
- * interpreter to do certain optimizations.
- */
- evil : true,
- /**
- * This option suppresses warnings about declaring variables inside
- * of control structures while accessing them later from the outside.
- * Even though identifiers declared with `var` have two real scopes—global
- * and function—such practice leads to confusion among people new to
- * the language and hard-to-debug bugs. This is why, by default, JSHint
- * warns about variables that are used outside of their intended scope.
- *
- * function test() {
- * if (true) {
- * var x = 0;
- * }
- *
- * x += 1; // Default: 'x' used out of scope.
- * // No warning when funcscope:true
- * }
- */
- funcscope : true,
- /**
- * This option suppresses warnings about the use of global strict mode.
- * Global strict mode can break third-party widgets so it is not
- * recommended.
- *
- * For more info about strict mode see the `strict` option.
- *
- * @deprecated Use `strict: "global"`.
- */
- globalstrict: true,
- /**
- * This option suppresses warnings about the `__iterator__` property. This
- * property is not supported by all browsers so use it carefully.
- */
- iterator : true,
- /**
- * This option suppresses warnings about invalid `typeof` operator values.
- * This operator has only [a limited set of possible return
- * values](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Operators/typeof).
- * By default, JSHint warns when you compare its result with an invalid
- * value which often can be a typo.
- *
- * // 'fuction' instead of 'function'
- * if (typeof a == "fuction") { // Invalid typeof value 'fuction'
- * // ...
- * }
- *
- * Do not use this option unless you're absolutely sure you don't want
- * these checks.
- */
- notypeof : true,
- /**
- * This option prohibits the use of unary increment and decrement
- * operators. Some people think that `++` and `--` reduces the quality of
- * their coding styles and there are programming languages—such as
- * Python—that go completely without these operators.
- */
- plusplus : true,
- /**
- * This option suppresses warnings about the `__proto__` property.
- */
- proto : true,
- /**
- * This option suppresses warnings about the use of script-targeted
- * URLs—such as `javascript:...`.
- */
- scripturl : true,
- /**
- * This option suppresses warnings about using `[]` notation when it can be
- * expressed in dot notation: `person['name']` vs. `person.name`.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- sub : true,
- /**
- * This option suppresses warnings about "weird" constructions like
- * `new function () { ... }` and `new Object;`. Such constructions are
- * sometimes used to produce singletons in JavaScript:
- *
- * var singleton = new function() {
- * var privateVar;
- *
- * this.publicMethod = function () {}
- * this.publicMethod2 = function () {}
- * };
- */
- supernew : true,
- /**
- * This option suppresses most of the warnings about possibly unsafe line
- * breakings in your code. It doesn't suppress warnings about comma-first
- * coding style. To suppress those you have to use `laxcomma` (see below).
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- laxbreak : true,
- /**
- * This option suppresses warnings about comma-first coding style:
- *
- * var obj = {
- * name: 'Anton'
- * , handle: 'valueof'
- * , role: 'SW Engineer'
- * };
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness.
- * If you would like to enforce rules relating to code style,
- * check out [the JSCS
- * project](https://github.com/jscs-dev/node-jscs).
- */
- laxcomma : true,
- /**
- * This option suppresses warnings about possible strict violations when
- * the code is running in strict mode and you use `this` in a
- * non-constructor function. You should use this option—in a function scope
- * only—when you are positive that your use of `this` is valid in the
- * strict mode (for example, if you call your function using
- * `Function.call`).
- *
- * **Note:** This option can be used only inside of a function scope.
- * JSHint will fail with an error if you will try to set this option
- * globally.
- */
- validthis : true,
- /**
- * This option suppresses warnings about the use of the `with` statement.
- * The semantics of the `with` statement can cause confusion among
- * developers and accidental definition of global variables.
- *
- * More info:
- *
- * * [with Statement Considered
- * Harmful](http://yuiblog.com/blog/2006/04/11/with-statement-considered-harmful/)
- */
- withstmt : true,
- /**
- * This options tells JSHint that your code uses Mozilla JavaScript
- * extensions. Unless you develop specifically for the Firefox web browser
- * you don't need this option.
- *
- * More info:
- *
- * * [New in JavaScript
- * 1.7](https://developer.mozilla.org/en-US/docs/JavaScript/New_in_JavaScript/1.7)
- */
- moz : true,
- /**
- * This option suppresses warnings about generator functions with no
- * `yield` statement in them.
- */
- noyield : true,
- /**
- * This option suppresses warnings about `== null` comparisons. Such
- * comparisons are often useful when you want to check if a variable is
- * `null` or `undefined`.
- */
- eqnull : true,
- /**
- * This option suppresses warnings about missing semicolons, but only when
- * the semicolon is omitted for the last statement in a one-line block:
- *
- * var name = (function() { return 'Anton' }());
- *
- * This is a very niche use case that is useful only when you use automatic
- * JavaScript code generators.
- */
- lastsemic : true,
- /**
- * This option suppresses warnings about functions inside of loops.
- * Defining functions inside of loops can lead to bugs such as this one:
- *
- * var nums = [];
- *
- * for (var i = 0; i < 10; i++) {
- * nums[i] = function (j) {
- * return i + j;
- * };
- * }
- *
- * nums[0](2); // Prints 12 instead of 2
- *
- * To fix the code above you need to copy the value of `i`:
- *
- * var nums = [];
- *
- * for (var i = 0; i < 10; i++) {
- * (function (i) {
- * nums[i] = function (j) {
- * return i + j;
- * };
- * }(i));
- * }
- */
- loopfunc : true,
- /**
- * This option suppresses warnings about the use of expressions where
- * normally you would expect to see assignments or function calls. Most of
- * the time, such code is a typo. However, it is not forbidden by the spec
- * and that's why this warning is optional.
- */
- expr : true,
- /**
- * This option tells JSHint that your code uses ECMAScript 6 specific
- * syntax. Note that not all browsers implement these features.
- *
- * More info:
- *
- * * [Specification for ECMAScript
- * 6](http://www.ecma-international.org/ecma-262/6.0/index.html)
- *
- * @deprecated Use `esversion: 6` instead.
- */
- esnext : true,
- /**
- * This option tells JSHint that your code uses ES3 array elision elements,
- * or empty elements (for example, `[1, , , 4, , , 7]`).
- */
- elision : true,
- },
- // Third party globals
- environments: {
- /**
- * This option defines globals exposed by the
- * [MooTools](http://mootools.net/) JavaScript framework.
- */
- mootools : true,
- /**
- * This option defines globals exposed by
- * [CouchDB](http://couchdb.apache.org/). CouchDB is a document-oriented
- * database that can be queried and indexed in a MapReduce fashion using
- * JavaScript.
- */
- couch : true,
- /**
- * This option defines globals exposed by [the Jasmine unit testing
- * framework](https://jasmine.github.io/).
- */
- jasmine : true,
- /**
- * This option defines globals exposed by the [jQuery](http://jquery.com/)
- * JavaScript library.
- */
- jquery : true,
- /**
- * This option defines globals available when your code is running inside
- * of the Node runtime environment. [Node.js](http://nodejs.org/) is a
- * server-side JavaScript environment that uses an asynchronous
- * event-driven model. This option also skips some warnings that make sense
- * in the browser environments but don't make sense in Node such as
- * file-level `use strict` pragmas and `console.log` statements.
- */
- node : true,
- /**
- * This option defines globals exposed by [the QUnit unit testing
- * framework](http://qunitjs.com/).
- */
- qunit : true,
- /**
- * This option defines globals available when your code is running inside
- * of the Rhino runtime environment. [Rhino](http://www.mozilla.org/rhino/)
- * is an open-source implementation of JavaScript written entirely in Java.
- */
- rhino : true,
- /**
- * This option defines globals exposed by [the ShellJS
- * library](http://documentup.com/arturadib/shelljs).
- */
- shelljs : true,
- /**
- * This option defines globals exposed by the
- * [Prototype](http://www.prototypejs.org/) JavaScript framework.
- */
- prototypejs : true,
- /**
- * This option defines globals exposed by the [YUI](http://yuilibrary.com/)
- * JavaScript framework.
- */
- yui : true,
- /**
- * This option defines globals exposed by the "BDD" and "TDD" UIs of the
- * [Mocha unit testing framework](http://mochajs.org/).
- */
- mocha : true,
- /**
- * This option informs JSHint that the input code describes an ECMAScript 6
- * module. All module code is interpreted as strict mode code.
- */
- module : true,
- /**
- * This option defines globals available when your code is running as a
- * script for the [Windows Script
- * Host](http://en.wikipedia.org/wiki/Windows_Script_Host).
- */
- wsh : true,
- /**
- * This option defines globals available when your code is running inside
- * of a Web Worker. [Web
- * Workers](https://developer.mozilla.org/en/Using_web_workers) provide a
- * simple means for web content to run scripts in background threads.
- */
- worker : true,
- /**
- * This option defines non-standard but widely adopted globals such as
- * `escape` and `unescape`.
- */
- nonstandard : true,
- /**
- * This option defines globals exposed by modern browsers: all the way from
- * good old `document` and `navigator` to the HTML5 `FileReader` and other
- * new developments in the browser world.
- *
- * **Note:** This option doesn't expose variables like `alert` or
- * `console`. See option `devel` for more information.
- */
- browser : true,
- /**
- * This option defines globals available when using [the Browserify
- * tool](http://browserify.org/) to build a project.
- */
- browserify : true,
- /**
- * This option defines globals that are usually used for logging poor-man's
- * debugging: `console`, `alert`, etc. It is usually a good idea to not
- * ship them in production because, for example, `console.log` breaks in
- * legacy versions of Internet Explorer.
- */
- devel : true,
- /**
- * This option defines globals exposed by the [Dojo
- * Toolkit](http://dojotoolkit.org/).
- */
- dojo : true,
- /**
- * This option defines globals for typed array constructors.
- *
- * More info:
- *
- * * [JavaScript typed
- * arrays](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Typed_arrays)
- */
- typed : true,
- /**
- * This option defines globals available when your core is running inside
- * of the PhantomJS runtime environment. [PhantomJS](http://phantomjs.org/)
- * is a headless WebKit scriptable with a JavaScript API. It has fast and
- * native support for various web standards: DOM handling, CSS selector,
- * JSON, Canvas, and SVG.
- */
- phantom : true
- },
- // Obsolete options
- obsolete: {
- onecase : true, // if one case switch statements should be allowed
- regexp : true, // if the . should not be allowed in regexp literals
- regexdash : true // if unescaped first/last dash (-) inside brackets
- // should be tolerated
- }
- };
- // These are the JSHint options that can take any value
- // (we use this object to detect invalid options)
- exports.val = {
- /**
- * This option lets you set the maximum length of a line.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness. If
- * you would like to enforce rules relating to code style, check
- * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
- */
- maxlen : false,
- /**
- * This option sets a specific tab width for your code.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness. If
- * you would like to enforce rules relating to code style, check
- * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
- */
- indent : false,
- /**
- * This options allows you to set the maximum amount of errors JSHint will
- * produce before giving up. Default is 50.
- */
- maxerr : false,
- /**
- * This option allows you to control which variables JSHint considers to be
- * implicitly defined in the environment. Configure it with an array of
- * string values. Prefixing a variable name with a hyphen (-) character will
- * remove that name from the collection of predefined variables.
- *
- * JSHint will consider variables declared in this way to be read-only.
- *
- * This option cannot be specified in-line; it may only be used via the
- * JavaScript API or from an external configuration file.
- */
- predef : false,
- /**
- * This option can be used to specify a white list of global variables that
- * are not formally defined in the source code. This is most useful when
- * combined with the `undef` option in order to suppress warnings for
- * project-specific global variables.
- *
- * Setting an entry to `true` enables reading and writing to that variable.
- * Setting it to `false` will trigger JSHint to consider that variable
- * read-only.
- *
- * See also the "environment" options: a set of options to be used as short
- * hand for enabling global variables defined in common JavaScript
- * environments.
- *
- * To configure `globals` within an individual file, see [Inline
- * Configuration](http://jshint.com/docs/#inline-configuration).
- */
- globals : false,
- /**
- * This option enforces the consistency of quotation marks used throughout
- * your code. It accepts three values: `true` if you don't want to enforce
- * one particular style but want some consistency, `"single"` if you want to
- * allow only single quotes and `"double"` if you want to allow only double
- * quotes.
- *
- * @deprecated JSHint is limiting its scope to issues of code correctness. If
- * you would like to enforce rules relating to code style, check
- * out [the JSCS project](https://github.com/jscs-dev/node-jscs).
- */
- quotmark : false,
- scope : false,
- /**
- * This option lets you set the max number of statements allowed per function:
- *
- * // jshint maxstatements:4
- *
- * function main() {
- * var i = 0;
- * var j = 0;
- *
- * // Function declarations count as one statement. Their bodies
- * // don't get taken into account for the outer function.
- * function inner() {
- * var i2 = 1;
- * var j2 = 1;
- *
- * return i2 + j2;
- * }
- *
- * j = i + j;
- * return j; // JSHint: Too many statements per function. (5)
- * }
- */
- maxstatements: false,
- /**
- * This option lets you control how nested do you want your blocks to be:
- *
- * // jshint maxdepth:2
- *
- * function main(meaning) {
- * var day = true;
- *
- * if (meaning === 42) {
- * while (day) {
- * shuffle();
- *
- * if (tired) { // JSHint: Blocks are nested too deeply (3).
- * sleep();
- * }
- * }
- * }
- * }
- */
- maxdepth : false,
- /**
- * This option lets you set the max number of formal parameters allowed per
- * function:
- *
- * // jshint maxparams:3
- *
- * function login(request, onSuccess) {
- * // ...
- * }
- *
- * // JSHint: Too many parameters per function (4).
- * function logout(request, isManual, whereAmI, onSuccess) {
- * // ...
- * }
- */
- maxparams : false,
- /**
- * This option lets you control cyclomatic complexity throughout your code.
- * Cyclomatic complexity measures the number of linearly independent paths
- * through a program's source code. Read more about [cyclomatic complexity on
- * Wikipedia](http://en.wikipedia.org/wiki/Cyclomatic_complexity).
- */
- maxcomplexity: false,
- /**
- * This option suppresses warnings about variable shadowing i.e. declaring a
- * variable that had been already declared somewhere in the outer scope.
- *
- * - "inner" - check for variables defined in the same scope only
- * - "outer" - check for variables defined in outer scopes as well
- * - false - same as inner
- * - true - allow variable shadowing
- */
- shadow : false,
- /**
- * This option requires the code to run in ECMAScript 5's strict mode.
- * [Strict mode](https://developer.mozilla.org/en/JavaScript/Strict_mode)
- * is a way to opt in to a restricted variant of JavaScript. Strict mode
- * eliminates some JavaScript pitfalls that didn't cause errors by changing
- * them to produce errors. It also fixes mistakes that made it difficult
- * for the JavaScript engines to perform certain optimizations.
- *
- * - "global" - there must be a `"use strict";` directive at global level
- * - "implied" - lint the code as if there is the `"use strict";` directive
- * - false - disable warnings about strict mode
- * - true - there must be a `"use strict";` directive at function level;
- * this is preferable for scripts intended to be loaded in web
- * browsers directly because enabling strict mode globally
- * could adversely effect other scripts running on the same
- * page
- */
- strict : true,
- /**
- * This option warns when you define and never use your variables. It is very
- * useful for general code cleanup, especially when used in addition to
- * `undef`.
- *
- * // jshint unused:true
- *
- * function test(a, b) {
- * var c, d = 2;
- *
- * return a + d;
- * }
- *
- * test(1, 2);
- *
- * // Line 3: 'b' was defined but never used.
- * // Line 4: 'c' was defined but never used.
- *
- * In addition to that, this option will warn you about unused global
- * variables declared via the `global` directive.
- *
- * When set to `true`, unused parameters that are followed by a used
- * parameter will not produce warnings. This option can be set to `vars` to
- * only check for variables, not function parameters, or `strict` to check
- * all variables and parameters.
- */
- unused : true,
- /**
- * This option prohibits the use of a variable before it was defined.
- * JavaScript has function scope only and, in addition to that, all variables
- * are always moved—or hoisted— to the top of the function. This behavior can
- * lead to some very nasty bugs and that's why it is safer to always use
- * variable only after they have been explicitly defined.
- *
- * Setting this option to "nofunc" will allow function declarations to be
- * ignored.
- *
- * For more in-depth understanding of scoping and hoisting in JavaScript,
- * read [JavaScript Scoping and
- * Hoisting](http://www.adequatelygood.com/2010/2/JavaScript-Scoping-and-Hoisting)
- * by Ben Cherry.
- */
- latedef : false,
- ignore : false, // start/end ignoring lines of code, bypassing the lexer
- // start - start ignoring lines, including the current line
- // end - stop ignoring lines, starting on the next line
- // line - ignore warnings / errors for just a single line
- // (this option does not bypass the lexer)
- ignoreDelimiters: false, // array of start/end delimiters used to ignore
- // certain chunks from code
- /**
- * This option is used to specify the ECMAScript version to which the code
- * must adhere. It can assume one of the following values:
- * - `3` - If you need your program to be executable
- * in older browsers—such as Internet Explorer 6/7/8/9—and other legacy
- * JavaScript environments
- * - `5` - To enable syntax first defined in [the ECMAScript 5.1
- * specification](http://www.ecma-international.org/ecma-262/5.1/index.html).
- * This includes allowing reserved keywords as object properties.
- * - `6` - To tell JSHint that your code uses [ECMAScript
- * 6](http://www.ecma-international.org/ecma-262/6.0/index.html) specific
- * syntax. Note that not all browsers implement them.
- * - `7` - To enable language features introduced by [ECMAScript
- * 7](https://www.ecma-international.org/ecma-262/7.0/index.html). Notable
- * additions: the exponentiation operator.
- * - `8` - To enable language features introduced by [ECMAScript
- * 8](https://www.ecma-international.org/ecma-262/8.0/index.html). Notable
- * additions: async functions, shared memory, and atomics
- * - `9` - To enable language features introduced by [ECMAScript
- * 9](https://www.ecma-international.org/ecma-262/9.0/index.html). Notable
- * additions: asynchronous iteration, rest/spread properties, and various
- * RegExp extensions
- * - `10` - To enable language features introduced by [ECMAScript
- * 10](https://www.ecma-international.org/ecma-262/10.0/index.html).
- * Notable additions: optional catch bindings.
- * - `11` - To enable language features introduced by ECMAScript 11. Notable
- * additions: "export * as ns from 'module'", `import.meta`, the nullish
- * coalescing operator, and optional chaining, and dynamic import.
- */
- esversion: 5
- };
- /**
- * Unstable options allow control for parsing and linting of proposed additions
- * to the JavaScript language. Just like the language features they describe,
- * the presence and behavior of these options is volatile; JSHint reserves the
- * right to remove or modify them between major version releases.
- */
- exports.unstable = {
- };
- // These are JSHint boolean options which are shared with JSLint
- // where the definition in JSHint is opposite JSLint
- exports.inverted = {
- bitwise : true,
- forin : true,
- newcap : true,
- plusplus: true,
- regexp : true,
- undef : true,
- // Inverted and renamed, use JSHint name here
- eqeqeq : true,
- strict : true
- };
- exports.validNames = Object.keys(exports.val)
- .concat(Object.keys(exports.bool.relaxing))
- .concat(Object.keys(exports.bool.enforcing))
- .concat(Object.keys(exports.bool.obsolete))
- .concat(Object.keys(exports.bool.environments))
- .concat(["unstable"]);
- exports.unstableNames = Object.keys(exports.unstable);
- // These are JSHint boolean options which are shared with JSLint
- // where the name has been changed but the effect is unchanged
- exports.renamed = {
- eqeq : "eqeqeq",
- windows: "wsh",
- sloppy : "strict"
- };
- exports.removed = {
- nomen: true,
- onevar: true,
- passfail: true,
- white: true,
- gcl: true,
- smarttabs: true,
- trailing: true
- };
- // Add options here which should not be automatically enforced by
- // `enforceall`.
- exports.noenforceall = {
- varstmt: true,
- strict: true,
- regexpu: true
- };
- },{}],21:[function(require,module,exports){
- /**
- * This module defines a set of enum-like values intended for use as bit
- * "flags" during parsing. The ECMAScript grammar defines a number of such
- * "production parameters" to control how certain forms are parsed in context.
- * JSHint implements additional parameters to facilitate detection of lint
- * warnings.
- *
- * An equivalent implementation which described the context in terms of a
- * "lookup table" object would be more idiomatic for a JavaScript project like
- * JSHint. However, because the number of contexts scales with the number of
- * expressions in the input program, this would have non-negligible impact on
- * the process's memory footprint.
- */
- module.exports = {
- /**
- * Enabled when parsing expressions within ES2015 "export" declarations,
- * allowing otherwise-unreferenced bindings to be considered "used".
- */
- export: 1,
- /**
- * Enabled when parsing expressions within the head of `for` statements,
- * allowing to distinguish between `for-in` and "C-style" `for` statements.
- */
- noin: 2,
- /**
- * Enabled when the expression begins the statement, allowing the parser to
- * correctly select between the null denotation ("nud") and first null
- * denotation ("fud") parsing strategy.
- */
- initial: 4,
- preAsync: 8,
- async: 16,
- /**
- * Enabled when any exception thrown by the expression will be caught by a
- * TryStatement.
- */
- tryClause: 32,
- /**
- * Enabled when parsing the body of a generator function.
- */
- yield: 64
- };
- },{}],22:[function(require,module,exports){
- /*
- * Regular expressions. Some of these are stupidly long.
- */
- /*jshint maxlen:1000 */
- "use strict";
- // Unsafe comment or string (ax)
- exports.unsafeString =
- /@cc|<\/?|script|\]\s*\]|<\s*!|</i;
- // Characters in strings that need escaping (nx and nxg)
- exports.needEsc =
- /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/;
- exports.needEscGlobal =
- /[\u0000-\u001f&<"\/\\\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
- // Star slash (lx)
- exports.starSlash = /\*\//;
- // Identifier (ix)
- exports.identifier = /^([a-zA-Z_$][a-zA-Z0-9_$]*)$/;
- // JavaScript URL (jx)
- exports.javascriptURL = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
- // Catches /* falls through */ comments (ft)
- exports.fallsThrough = /^\s*falls?\sthrough\s*$/;
- // very conservative rule (eg: only one space between the start of the comment and the first character)
- // to relax the maxlen option
- exports.maxlenException = /^(?:(?:\/\/|\/\*|\*) ?)?[^ ]+$/;
- // Node.js releases prior to version 8 include a version of the V8 engine which
- // incorrectly interprets the character class escape `\s`. The following
- // regular expression may be replaced with `/\s/` when JSHint removes support
- // for Node.js versions prior to 8.
- // Source:
- // https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/RegExp
- exports.whitespace = /[ \f\n\r\t\v\u00a0\u1680\u2000-\u200a\u2028\u2029\u202f\u205f\u3000\ufeff]/;
- exports.nonzeroDigit = /^[1-9]$/;
- exports.decimalDigit = /^[0-9]$/;
- exports.regexpSyntaxChars = /[\^$\\.*+?()[\]{}|]/;
- exports.regexpQuantifiers = /[*+?{]/;
- exports.regexpControlEscapes = /[fnrtv]/;
- exports.regexpCharClasses = /[dDsSwWpP]/;
- // Identifies the "dot" atom in regular expressions
- exports.regexpDot = /(^|[^\\])(\\\\)*\./;
- },{}],23:[function(require,module,exports){
- "use strict";
- /**
- * A note on `__proto__`:
- *
- * This file uses ordinary objects to track identifiers that are observed in
- * the input source code. It creates these objects using `Object.create` so
- * that the tracking objects have no prototype, allowing the `__proto__`
- * property to be used to store a value *without* triggering the invocation of
- * the built-in `Object.prototype.__proto__` accessor method. Some environments
- * (e.g. PhantomJS) do not implement the correct semantics for property
- * enumeration. In those environments, methods like `Object.keys` and Lodash's
- * `values` do not include the property name. This file includes a number of
- * branches which ensure that JSHint behaves consistently in those
- * environments. The branches must be ignored by the test coverage verification
- * system because the workaround is not necessary in the environment where
- * coverage is verified (i.e. Node.js).
- */
- var _ = require("lodash");
- var events = require("events");
- // Used to denote membership in lookup tables (a primitive value such as `true`
- // would be silently rejected for the property name "__proto__" in some
- // environments)
- var marker = {};
- /**
- * A factory function for creating scope managers. A scope manager tracks
- * bindings, detecting when variables are referenced (through "usages").
- *
- * @param {object} state - the global state object (see `state.js`)
- * @param {Array} predefined - a set of binding names for built-in bindings
- * provided by the environment
- * @param {object} exported - a hash for binding names that are intended to be
- * referenced in contexts beyond the current program
- * code
- * @param {object} declared - a hash for binding names that were defined as
- * global bindings via linting configuration
- *
- * @returns {object} - a scope manager
- */
- var scopeManager = function(state, predefined, exported, declared) {
- var _current;
- var _scopeStack = [];
- function _newScope(type) {
- _current = {
- "(bindings)": Object.create(null),
- "(usages)": Object.create(null),
- "(labels)": Object.create(null),
- "(parent)": _current,
- "(type)": type,
- "(params)": (type === "functionparams" || type === "catchparams") ? [] : null
- };
- _scopeStack.push(_current);
- }
- _newScope("global");
- _current["(predefined)"] = predefined;
- var _currentFunctBody = _current; // this is the block after the params = function
- var usedPredefinedAndGlobals = Object.create(null);
- var impliedGlobals = Object.create(null);
- var unuseds = [];
- var esModuleExports = [];
- var emitter = new events.EventEmitter();
- function warning(code, token) {
- emitter.emit("warning", {
- code: code,
- token: token,
- data: _.slice(arguments, 2)
- });
- }
- function error(code, token) {
- emitter.emit("warning", {
- code: code,
- token: token,
- data: _.slice(arguments, 2)
- });
- }
- function _setupUsages(bindingName) {
- if (!_current["(usages)"][bindingName]) {
- _current["(usages)"][bindingName] = {
- "(modified)": [],
- "(reassigned)": [],
- "(tokens)": []
- };
- }
- }
- var _getUnusedOption = function(unused_opt) {
- if (unused_opt === undefined) {
- unused_opt = state.option.unused;
- }
- if (unused_opt === true) {
- unused_opt = "last-param";
- }
- return unused_opt;
- };
- var _warnUnused = function(name, tkn, type, unused_opt) {
- var line = tkn.line;
- var chr = tkn.from;
- var raw_name = tkn.raw_text || name;
- unused_opt = _getUnusedOption(unused_opt);
- var warnable_types = {
- "vars": ["var"],
- "last-param": ["var", "param"],
- "strict": ["var", "param", "last-param"]
- };
- if (unused_opt) {
- if (warnable_types[unused_opt] && warnable_types[unused_opt].indexOf(type) !== -1) {
- warning("W098", { line: line, from: chr }, raw_name);
- }
- }
- // inconsistent - see gh-1894
- if (unused_opt || type === "var") {
- unuseds.push({
- name: name,
- line: line,
- character: chr
- });
- }
- };
- /**
- * Check the current scope for unused identifiers
- */
- function _checkForUnused() {
- if (_current["(type)"] !== "functionparams") {
- var currentBindings = _current["(bindings)"];
- for (var bindingName in currentBindings) {
- if (currentBindings[bindingName]["(type)"] !== "exception" &&
- currentBindings[bindingName]["(unused)"]) {
- _warnUnused(bindingName, currentBindings[bindingName]["(token)"], "var");
- }
- }
- return;
- }
- // Check the current scope for unused parameters and issue warnings as
- // necessary.
- var params = _current["(params)"];
- var param = params.pop();
- var unused_opt;
- while (param) {
- var binding = _current["(bindings)"][param];
- unused_opt = _getUnusedOption(state.funct["(unusedOption)"]);
- // 'undefined' is a special case for the common pattern where `undefined`
- // is used as a formal parameter name to defend against global
- // re-assignment, e.g.
- //
- // (function(window, undefined) {
- // })();
- if (param === "undefined")
- return;
- if (binding["(unused)"]) {
- _warnUnused(param, binding["(token)"], "param", state.funct["(unusedOption)"]);
- } else if (unused_opt === "last-param") {
- return;
- }
- param = params.pop();
- }
- }
- /**
- * Find the relevant binding's scope. The owning scope is located by first
- * inspecting the current scope and then moving "downward" through the stack
- * of scopes.
- *
- * @param {string} bindingName - the value of the identifier
- *
- * @returns {Object} - the scope in which the binding was found
- */
- function _getBinding(bindingName) {
- for (var i = _scopeStack.length - 1 ; i >= 0; --i) {
- var scopeBindings = _scopeStack[i]["(bindings)"];
- if (scopeBindings[bindingName]) {
- return scopeBindings;
- }
- }
- }
- /**
- * Determine if a given binding name has been referenced within the current
- * function or any function defined within.
- *
- * @param {string} bindingName - the value of the identifier
- *
- * @returns {boolean}
- */
- function usedSoFarInCurrentFunction(bindingName) {
- for (var i = _scopeStack.length - 1; i >= 0; i--) {
- var current = _scopeStack[i];
- if (current["(usages)"][bindingName]) {
- return current["(usages)"][bindingName];
- }
- if (current === _currentFunctBody) {
- break;
- }
- }
- return false;
- }
- function _checkOuterShadow(bindingName, token) {
- // only check if shadow is outer
- if (state.option.shadow !== "outer") {
- return;
- }
- var isGlobal = _currentFunctBody["(type)"] === "global",
- isNewFunction = _current["(type)"] === "functionparams";
- var outsideCurrentFunction = !isGlobal;
- for (var i = 0; i < _scopeStack.length; i++) {
- var stackItem = _scopeStack[i];
- if (!isNewFunction && _scopeStack[i + 1] === _currentFunctBody) {
- outsideCurrentFunction = false;
- }
- if (outsideCurrentFunction && stackItem["(bindings)"][bindingName]) {
- warning("W123", token, bindingName);
- }
- if (stackItem["(labels)"][bindingName]) {
- warning("W123", token, bindingName);
- }
- }
- }
- function _latedefWarning(type, bindingName, token) {
- var isFunction;
- if (state.option.latedef) {
- isFunction = type === "function" || type === "generator function" ||
- type === "async function";
- // if either latedef is strict and this is a function
- // or this is not a function
- if ((state.option.latedef === true && isFunction) || !isFunction) {
- warning("W003", token, bindingName);
- }
- }
- }
- var scopeManagerInst = {
- on: function(names, listener) {
- names.split(" ").forEach(function(name) {
- emitter.on(name, listener);
- });
- },
- isPredefined: function(bindingName) {
- return !this.has(bindingName) && _.has(_scopeStack[0]["(predefined)"], bindingName);
- },
- /**
- * Create a new scope within the current scope. As the topmost value, the
- * new scope will be interpreted as the current scope until it is
- * exited--see the `unstack` method.
- *
- * @param {string} [type] - The type of the scope. Valid values are
- * "functionparams", "catchparams" and
- * "functionouter"
- */
- stack: function(type) {
- var previousScope = _current;
- _newScope(type);
- if (!type && previousScope["(type)"] === "functionparams") {
- _current["(isFuncBody)"] = true;
- _currentFunctBody = _current;
- }
- },
- /**
- * Valldate all binding references and declarations in the current scope
- * and set the next scope on the stack as the active scope.
- */
- unstack: function() {
- // jshint proto: true
- var subScope = _scopeStack.length > 1 ? _scopeStack[_scopeStack.length - 2] : null;
- var isUnstackingFunctionBody = _current === _currentFunctBody,
- isUnstackingFunctionParams = _current["(type)"] === "functionparams",
- isUnstackingFunctionOuter = _current["(type)"] === "functionouter";
- var i, j, isImmutable, isFunction;
- var currentUsages = _current["(usages)"];
- var currentBindings = _current["(bindings)"];
- var usedBindingNameList = Object.keys(currentUsages);
- // See comment, "A note on `__proto__`"
- /* istanbul ignore if */
- if (currentUsages.__proto__ && usedBindingNameList.indexOf("__proto__") === -1) {
- usedBindingNameList.push("__proto__");
- }
- for (i = 0; i < usedBindingNameList.length; i++) {
- var usedBindingName = usedBindingNameList[i];
- var usage = currentUsages[usedBindingName];
- var usedBinding = currentBindings[usedBindingName];
- if (usedBinding) {
- var usedBindingType = usedBinding["(type)"];
- isImmutable = usedBindingType === "const" || usedBindingType === "import";
- if (usedBinding["(useOutsideOfScope)"] && !state.option.funcscope) {
- var usedTokens = usage["(tokens)"];
- for (j = 0; j < usedTokens.length; j++) {
- // Keep the consistency of https://github.com/jshint/jshint/issues/2409
- if (usedBinding["(function)"] === usedTokens[j]["(function)"]) {
- error("W038", usedTokens[j], usedBindingName);
- }
- }
- }
- // mark the binding used
- _current["(bindings)"][usedBindingName]["(unused)"] = false;
- // check for modifying a const
- if (isImmutable && usage["(modified)"]) {
- for (j = 0; j < usage["(modified)"].length; j++) {
- error("E013", usage["(modified)"][j], usedBindingName);
- }
- }
- isFunction = usedBindingType === "function" ||
- usedBindingType === "generator function" ||
- usedBindingType === "async function";
- // check for re-assigning a function declaration
- if ((isFunction || usedBindingType === "class") && usage["(reassigned)"]) {
- for (j = 0; j < usage["(reassigned)"].length; j++) {
- if (!usage["(reassigned)"][j].ignoreW021) {
- warning("W021", usage["(reassigned)"][j], usedBindingName, usedBindingType);
- }
- }
- }
- continue;
- }
- if (subScope) {
- var bindingType = this.bindingtype(usedBindingName);
- isImmutable = bindingType === "const" ||
- (bindingType === null && _scopeStack[0]["(predefined)"][usedBindingName] === false);
- if (isUnstackingFunctionOuter && !isImmutable) {
- if (!state.funct["(outerMutables)"]) {
- state.funct["(outerMutables)"] = [];
- }
- state.funct["(outerMutables)"].push(usedBindingName);
- }
- // not exiting the global scope, so copy the usage down in case its an out of scope usage
- if (!subScope["(usages)"][usedBindingName]) {
- subScope["(usages)"][usedBindingName] = usage;
- if (isUnstackingFunctionBody) {
- subScope["(usages)"][usedBindingName]["(onlyUsedSubFunction)"] = true;
- }
- } else {
- var subScopeUsage = subScope["(usages)"][usedBindingName];
- subScopeUsage["(modified)"] = subScopeUsage["(modified)"].concat(usage["(modified)"]);
- subScopeUsage["(tokens)"] = subScopeUsage["(tokens)"].concat(usage["(tokens)"]);
- subScopeUsage["(reassigned)"] =
- subScopeUsage["(reassigned)"].concat(usage["(reassigned)"]);
- }
- } else {
- // this is exiting global scope, so we finalise everything here - we are at the end of the file
- if (typeof _current["(predefined)"][usedBindingName] === "boolean") {
- // remove the declared token, so we know it is used
- delete declared[usedBindingName];
- // note it as used so it can be reported
- usedPredefinedAndGlobals[usedBindingName] = marker;
- // check for re-assigning a read-only (set to false) predefined
- if (_current["(predefined)"][usedBindingName] === false && usage["(reassigned)"]) {
- for (j = 0; j < usage["(reassigned)"].length; j++) {
- if (!usage["(reassigned)"][j].ignoreW020) {
- warning("W020", usage["(reassigned)"][j]);
- }
- }
- }
- }
- else {
- // binding usage is not predefined and we have not found a declaration
- // so report as undeclared
- for (j = 0; j < usage["(tokens)"].length; j++) {
- var undefinedToken = usage["(tokens)"][j];
- // if its not a forgiven undefined (e.g. typof x)
- if (!undefinedToken.forgiveUndef) {
- // if undef is on and undef was on when the token was defined
- if (state.option.undef && !undefinedToken.ignoreUndef) {
- warning("W117", undefinedToken, usedBindingName);
- }
- if (impliedGlobals[usedBindingName]) {
- impliedGlobals[usedBindingName].line.push(undefinedToken.line);
- } else {
- impliedGlobals[usedBindingName] = {
- name: usedBindingName,
- line: [undefinedToken.line]
- };
- }
- }
- }
- }
- }
- }
- // if exiting the global scope, we can warn about declared globals that haven't been used yet
- if (!subScope) {
- Object.keys(declared)
- .forEach(function(bindingNotUsed) {
- _warnUnused(bindingNotUsed, declared[bindingNotUsed], "var");
- });
- }
- // If this is not a function boundary, transfer function-scoped bindings to
- // the parent block (a rough simulation of variable hoisting). Previously
- // existing bindings in the parent block should take precedence so that
- // prior usages are not discarded.
- if (subScope && !isUnstackingFunctionBody &&
- !isUnstackingFunctionParams && !isUnstackingFunctionOuter) {
- var bindingNames = Object.keys(currentBindings);
- for (i = 0; i < bindingNames.length; i++) {
- var defBindingName = bindingNames[i];
- var defBinding = currentBindings[defBindingName];
- if (!defBinding["(blockscoped)"] && defBinding["(type)"] !== "exception") {
- var shadowed = subScope["(bindings)"][defBindingName];
- // Do not overwrite a binding if it exists in the parent scope
- // because it is shared by adjacent blocks. Copy the `unused`
- // property so that any references found within the current block
- // are counted toward that higher-level declaration.
- if (shadowed) {
- shadowed["(unused)"] &= defBinding["(unused)"];
- // "Hoist" the variable to the parent block, decorating the binding
- // so that future references, though technically valid, can be
- // reported as "out-of-scope" in the absence of the `funcscope`
- // option.
- } else {
- defBinding["(useOutsideOfScope)"] =
- // Do not warn about out-of-scope usages in the global scope
- _currentFunctBody["(type)"] !== "global" &&
- // When a higher scope contains a binding for the binding, the
- // binding is a re-declaration and should not prompt "used
- // out-of-scope" warnings.
- !this.funct.has(defBindingName, { excludeCurrent: true });
- subScope["(bindings)"][defBindingName] = defBinding;
- }
- delete currentBindings[defBindingName];
- }
- }
- }
- _checkForUnused();
- _scopeStack.pop();
- if (isUnstackingFunctionBody) {
- _currentFunctBody = _scopeStack[_.findLastIndex(_scopeStack, function(scope) {
- // if function or if global (which is at the bottom so it will only return true if we call back)
- return scope["(isFuncBody)"] || scope["(type)"] === "global";
- })];
- }
- _current = subScope;
- },
- /**
- * Add a function parameter to the current scope.
- *
- * @param {string} bindingName - the value of the identifier
- * @param {Token} token
- * @param {string} [type] - binding type; defaults to "param"
- */
- addParam: function(bindingName, token, type) {
- type = type || "param";
- if (type === "exception") {
- // if defined in the current function
- var previouslyDefinedBindingType = this.funct.bindingtype(bindingName);
- if (previouslyDefinedBindingType && previouslyDefinedBindingType !== "exception") {
- // and has not been used yet in the current function scope
- if (!state.option.node) {
- warning("W002", state.tokens.next, bindingName);
- }
- }
- if (state.isStrict() && (bindingName === "arguments" || bindingName === "eval")) {
- warning("E008", token);
- }
- }
- // The variable was declared in the current scope
- if (_.has(_current["(bindings)"], bindingName)) {
- _current["(bindings)"][bindingName].duplicated = true;
- // The variable was declared in an outer scope
- } else {
- // if this scope has the variable defined, it's a re-definition error
- _checkOuterShadow(bindingName, token);
- _current["(bindings)"][bindingName] = {
- "(type)" : type,
- "(token)": token,
- "(unused)": true };
- _current["(params)"].push(bindingName);
- }
- if (_.has(_current["(usages)"], bindingName)) {
- var usage = _current["(usages)"][bindingName];
- // if its in a sub function it is not necessarily an error, just latedef
- if (usage["(onlyUsedSubFunction)"]) {
- _latedefWarning(type, bindingName, token);
- } else {
- // this is a clear illegal usage, but not a syntax error, so emit a
- // warning and not an error
- warning("W003", token, bindingName);
- }
- }
- },
- validateParams: function(isArrow) {
- var isStrict = state.isStrict();
- var currentFunctParamScope = _currentFunctBody["(parent)"];
- // From ECMAScript 2017:
- //
- // > 14.1.2Static Semantics: Early Errors
- // >
- // > [...]
- // > - It is a Syntax Error if IsSimpleParameterList of
- // > FormalParameterList is false and BoundNames of FormalParameterList
- // > contains any duplicate elements.
- var isSimple = state.funct['(hasSimpleParams)'];
- // Method definitions are defined in terms of UniqueFormalParameters, so
- // they cannot support duplicate parameter names regardless of strict
- // mode.
- var isMethod = state.funct["(method)"];
- if (!currentFunctParamScope["(params)"]) {
- /* istanbul ignore next */
- return;
- }
- currentFunctParamScope["(params)"].forEach(function(bindingName) {
- var binding = currentFunctParamScope["(bindings)"][bindingName];
- if (binding.duplicated) {
- if (isStrict || isArrow || isMethod || !isSimple) {
- warning("E011", binding["(token)"], bindingName);
- } else if (state.option.shadow !== true) {
- warning("W004", binding["(token)"], bindingName);
- }
- }
- if (isStrict && (bindingName === "arguments" || bindingName === "eval")) {
- warning("E008", binding["(token)"]);
- }
- });
- },
- getUsedOrDefinedGlobals: function() {
- // jshint proto: true
- var list = Object.keys(usedPredefinedAndGlobals);
- // See comment, "A note on `__proto__`"
- /* istanbul ignore if */
- if (usedPredefinedAndGlobals.__proto__ === marker &&
- list.indexOf("__proto__") === -1) {
- list.push("__proto__");
- }
- return list;
- },
- /**
- * Get an array of implied globals
- *
- * @returns {Array.<{ name: string, line: Array.<number>}>}
- */
- getImpliedGlobals: function() {
- // jshint proto: true
- var values = _.values(impliedGlobals);
- var hasProto = false;
- // See comment, "A note on `__proto__`"
- if (impliedGlobals.__proto__) {
- hasProto = values.some(function(value) {
- return value.name === "__proto__";
- });
- /* istanbul ignore if */
- if (!hasProto) {
- values.push(impliedGlobals.__proto__);
- }
- }
- return values;
- },
- /**
- * Get an array of objects describing unused bindings.
- *
- * @returns {Array<Object>}
- */
- getUnuseds: function() {
- return unuseds;
- },
- /**
- * Determine if a given name has been defined in the current scope or any
- * lower scope.
- *
- * @param {string} bindingName - the value of the identifier
- *
- * @return {boolean}
- */
- has: function(bindingName) {
- return Boolean(_getBinding(bindingName));
- },
- /**
- * Retrieve binding described by `bindingName` or null
- *
- * @param {string} bindingName - the value of the identifier
- *
- * @returns {string|null} - the type of the binding or `null` if no such
- * binding exists
- */
- bindingtype: function(bindingName) {
- var scopeBindings = _getBinding(bindingName);
- if (scopeBindings) {
- return scopeBindings[bindingName]["(type)"];
- }
- return null;
- },
- /**
- * For the exported options, indicating a variable is used outside the file
- *
- * @param {string} bindingName - the value of the identifier
- */
- addExported: function(bindingName) {
- var globalBindings = _scopeStack[0]["(bindings)"];
- if (_.has(declared, bindingName)) {
- // remove the declared token, so we know it is used
- delete declared[bindingName];
- } else if (_.has(globalBindings, bindingName)) {
- globalBindings[bindingName]["(unused)"] = false;
- } else {
- for (var i = 1; i < _scopeStack.length; i++) {
- var scope = _scopeStack[i];
- // if `scope.(type)` is not defined, it is a block scope
- if (!scope["(type)"]) {
- if (_.has(scope["(bindings)"], bindingName) &&
- !scope["(bindings)"][bindingName]["(blockscoped)"]) {
- scope["(bindings)"][bindingName]["(unused)"] = false;
- return;
- }
- } else {
- break;
- }
- }
- exported[bindingName] = true;
- }
- },
- /**
- * Mark a binding as "exported" by an ES2015 module
- *
- * @param {string} bindingName - the value of the identifier
- * @param {object} token
- */
- setExported: function(localName, exportName) {
- if (exportName) {
- if (esModuleExports.indexOf(exportName.value) > -1) {
- error("E069", exportName, exportName.value);
- }
- esModuleExports.push(exportName.value);
- }
- if (localName) {
- this.block.use(localName.value, localName);
- }
- },
- /**
- * Mark a binding as "initialized." This is necessary to enforce the
- * "temporal dead zone" (TDZ) of block-scoped bindings which are not
- * hoisted.
- *
- * @param {string} bindingName - the value of the identifier
- */
- initialize: function(bindingName) {
- if (_current["(bindings)"][bindingName]) {
- _current["(bindings)"][bindingName]["(initialized)"] = true;
- }
- },
- /**
- * Create a new binding and add it to the current scope. Delegates to the
- * internal `block.add` or `func.add` methods depending on the type.
- * Produces warnings and errors as necessary.
- *
- * @param {string} bindingName
- * @param {Object} opts
- * @param {String} opts.type - the type of the binding e.g. "param", "var",
- * "let, "const", "import", "function",
- * "generator function", "async function",
- * "async generator function"
- * @param {object} opts.token - the token pointing at the declaration
- * @param {boolean} opts.initialized - whether the binding should be
- * created in an "initialized" state.
- */
- addbinding: function(bindingName, opts) {
- var type = opts.type;
- var token = opts.token;
- var isblockscoped = type === "let" || type === "const" ||
- type === "class" || type === "import" || type === "generator function" ||
- type === "async function" || type === "async generator function";
- var ishoisted = type === "function" || type === "generator function" ||
- type === "async function" || type === "import";
- var isexported = (isblockscoped ? _current : _currentFunctBody)["(type)"] === "global" &&
- _.has(exported, bindingName);
- // outer shadow check (inner is only on non-block scoped)
- _checkOuterShadow(bindingName, token);
- if (state.isStrict() && (bindingName === "arguments" || bindingName === "eval")) {
- warning("E008", token);
- }
- if (isblockscoped) {
- var declaredInCurrentScope = _current["(bindings)"][bindingName];
- // for block scoped variables, params are seen in the current scope as the root function
- // scope, so check these too.
- if (!declaredInCurrentScope && _current === _currentFunctBody &&
- _current["(type)"] !== "global") {
- declaredInCurrentScope = !!_currentFunctBody["(parent)"]["(bindings)"][bindingName];
- }
- // if its not already defined (which is an error, so ignore) and is used in TDZ
- if (!declaredInCurrentScope && _current["(usages)"][bindingName]) {
- var usage = _current["(usages)"][bindingName];
- // if its in a sub function it is not necessarily an error, just latedef
- if (usage["(onlyUsedSubFunction)"] || ishoisted) {
- _latedefWarning(type, bindingName, token);
- } else if (!ishoisted) {
- // this is a clear illegal usage for block scoped variables
- warning("E056", token, bindingName, type);
- }
- }
- // If this scope has already declared a binding with the same name,
- // then this represents a redeclaration error if:
- //
- // 1. it is a "hoisted" block-scoped binding within a block. For
- // instance: generator functions may be redeclared in the global
- // scope but not within block statements
- // 2. this is not a "hoisted" block-scoped binding
- if (declaredInCurrentScope &&
- (!ishoisted || (_current["(type)"] !== "global" || type === "import"))) {
- warning("E011", token, bindingName);
- }
- else if (state.option.shadow === "outer") {
- // if shadow is outer, for block scope we want to detect any shadowing within this function
- if (scopeManagerInst.funct.has(bindingName)) {
- warning("W004", token, bindingName);
- }
- }
- scopeManagerInst.block.add(
- bindingName, type, token, !isexported, opts.initialized
- );
- } else {
- var declaredInCurrentFunctionScope = scopeManagerInst.funct.has(bindingName);
- // check for late definition, ignore if already declared
- if (!declaredInCurrentFunctionScope && usedSoFarInCurrentFunction(bindingName)) {
- _latedefWarning(type, bindingName, token);
- }
- // defining with a var or a function when a block scope variable of the same name
- // is in scope is an error
- if (scopeManagerInst.funct.has(bindingName, { onlyBlockscoped: true })) {
- warning("E011", token, bindingName);
- } else if (state.option.shadow !== true) {
- // now since we didn't get any block scope variables, test for var/function
- // shadowing
- if (declaredInCurrentFunctionScope && bindingName !== "__proto__") {
- // see https://github.com/jshint/jshint/issues/2400
- if (_currentFunctBody["(type)"] !== "global") {
- warning("W004", token, bindingName);
- }
- }
- }
- scopeManagerInst.funct.add(bindingName, type, token, !isexported);
- if (_currentFunctBody["(type)"] === "global" && !state.impliedClosure()) {
- usedPredefinedAndGlobals[bindingName] = marker;
- }
- }
- },
- funct: {
- /**
- * Return the type of the provided binding given certain options
- *
- * @param {string} bindingName
- * @param {Object=} [options]
- * @param {boolean} [options.onlyBlockscoped] - only include block scoped
- * bindings
- * @param {boolean} [options.excludeParams] - exclude the param scope
- * @param {boolean} [options.excludeCurrent] - exclude the current scope
- *
- * @returns {String}
- */
- bindingtype: function(bindingName, options) {
- var onlyBlockscoped = options && options.onlyBlockscoped;
- var excludeParams = options && options.excludeParams;
- var currentScopeIndex = _scopeStack.length - (options && options.excludeCurrent ? 2 : 1);
- for (var i = currentScopeIndex; i >= 0; i--) {
- var current = _scopeStack[i];
- if (current["(bindings)"][bindingName] &&
- (!onlyBlockscoped || current["(bindings)"][bindingName]["(blockscoped)"])) {
- return current["(bindings)"][bindingName]["(type)"];
- }
- var scopeCheck = excludeParams ? _scopeStack[ i - 1 ] : current;
- if (scopeCheck && scopeCheck["(type)"] === "functionparams") {
- return null;
- }
- }
- return null;
- },
- /**
- * Determine whether a `break` statement label exists in the function
- * scope.
- *
- * @param {string} labelName - the value of the identifier
- *
- * @returns {boolean}
- */
- hasLabel: function(labelName) {
- for (var i = _scopeStack.length - 1; i >= 0; i--) {
- var current = _scopeStack[i];
- if (current["(labels)"][labelName]) {
- return true;
- }
- if (current["(type)"] === "functionparams") {
- return false;
- }
- }
- return false;
- },
- /**
- * Determine if a given name has been defined in the current function
- * scope.
- *
- * @param {string} bindingName - the value of the identifier
- * @param {object} options - options as supported by the
- * `funct.bindingtype` method
- *
- * @return {boolean}
- */
- has: function(bindingName, options) {
- return Boolean(this.bindingtype(bindingName, options));
- },
- /**
- * Create a new function-scoped binding and add it to the current scope.
- * See the `block.add` method for coresponding logic to create
- * block-scoped bindings.
- *
- * @param {string} bindingName - the value of the identifier
- * @param {string} type - the type of the binding; either "function" or
- * "var"
- * @param {object} tok - the token that triggered the definition
- * @param {boolean} unused - `true` if the binding has not been
- * referenced
- */
- add: function(bindingName, type, tok, unused) {
- _current["(bindings)"][bindingName] = {
- "(type)" : type,
- "(token)": tok,
- "(blockscoped)": false,
- "(function)": _currentFunctBody,
- "(unused)": unused };
- }
- },
- block: {
- /**
- * Determine whether the current block scope is the global scope.
- *
- * @returns Boolean
- */
- isGlobal: function() {
- return _current["(type)"] === "global";
- },
- /**
- * Resolve a reference to a binding and mark the corresponding binding as
- * "used."
- *
- * @param {string} bindingName - the value of the identifier
- * @param {object} token - the token value that triggered the reference
- */
- use: function(bindingName, token) {
- // If the name resolves to a parameter of the current function, then do
- // not store usage. This is because in cases such as the following:
- //
- // function(a) {
- // var a;
- // a = a;
- // }
- //
- // the usage of `a` will resolve to the parameter, not to the unset
- // variable binding.
- var paramScope = _currentFunctBody["(parent)"];
- if (paramScope && paramScope["(bindings)"][bindingName] &&
- paramScope["(bindings)"][bindingName]["(type)"] === "param") {
- // then check its not declared by a block scope variable
- if (!scopeManagerInst.funct.has(bindingName,
- { excludeParams: true, onlyBlockscoped: true })) {
- paramScope["(bindings)"][bindingName]["(unused)"] = false;
- }
- }
- if (token && (state.ignored.W117 || state.option.undef === false)) {
- token.ignoreUndef = true;
- }
- _setupUsages(bindingName);
- _current["(usages)"][bindingName]["(onlyUsedSubFunction)"] = false;
- if (token) {
- token["(function)"] = _currentFunctBody;
- _current["(usages)"][bindingName]["(tokens)"].push(token);
- }
- // Block-scoped bindings can't be used within their initializer due to
- // "temporal dead zone" (TDZ) restrictions.
- var binding = _current["(bindings)"][bindingName];
- if (binding && binding["(blockscoped)"] && !binding["(initialized)"]) {
- error("E056", token, bindingName, binding["(type)"]);
- }
- },
- reassign: function(bindingName, token) {
- token.ignoreW020 = state.ignored.W020;
- token.ignoreW021 = state.ignored.W021;
- this.modify(bindingName, token);
- _current["(usages)"][bindingName]["(reassigned)"].push(token);
- },
- modify: function(bindingName, token) {
- _setupUsages(bindingName);
- _current["(usages)"][bindingName]["(onlyUsedSubFunction)"] = false;
- _current["(usages)"][bindingName]["(modified)"].push(token);
- },
- /**
- * Create a new block-scoped binding and add it to the current scope. See
- * the `funct.add` method for coresponding logic to create
- * function-scoped bindings.
- *
- * @param {string} bindingName - the value of the identifier
- * @param {string} type - the type of the binding; one of "class",
- * "const", "function", "import", or "let"
- * @param {object} tok - the token that triggered the definition
- * @param {boolean} unused - `true` if the binding has not been
- * referenced
- * @param {boolean} initialized - `true` if the binding has been
- * initialized (as is the case with
- * bindings created via `import`
- * declarations)
- */
- add: function(bindingName, type, tok, unused, initialized) {
- _current["(bindings)"][bindingName] = {
- "(type)" : type,
- "(token)": tok,
- "(initialized)": !!initialized,
- "(blockscoped)": true,
- "(unused)": unused };
- },
- addLabel: function(labelName, opts) {
- var token = opts.token;
- if (scopeManagerInst.funct.hasLabel(labelName)) {
- warning("E011", token, labelName);
- }
- else if (state.option.shadow === "outer") {
- if (scopeManagerInst.funct.has(labelName)) {
- warning("W004", token, labelName);
- } else {
- _checkOuterShadow(labelName, token);
- }
- }
- _current["(labels)"][labelName] = token;
- }
- }
- };
- return scopeManagerInst;
- };
- module.exports = scopeManager;
- },{"events":11,"lodash":12}],24:[function(require,module,exports){
- "use strict";
- var NameStack = require("./name-stack.js");
- var state = {
- syntax: {},
- /**
- * Determine if the code currently being linted is strict mode code.
- *
- * @returns {boolean}
- */
- isStrict: function() {
- return !!this.directive["use strict"] || this.inClassBody ||
- this.option.module || this.option.strict === "implied";
- },
- /**
- * Determine if the current state warrants a warning for statements outside
- * of strict mode code.
- *
- * While emitting warnings based on function scope would be more intuitive
- * (and less noisy), JSHint observes statement-based semantics in order to
- * preserve legacy behavior.
- *
- * This method does not take the state of the parser into account, making no
- * distinction between global code and function code. Because the "missing
- * 'use strict'" warning is *also* reported at function boundaries, this
- * function interprets `strict` option values `true` and `undefined` as
- * equivalent.
- */
- stmtMissingStrict: function() {
- if (this.option.strict === "global") {
- return true;
- }
- if (this.option.strict === false) {
- return false;
- }
- if (this.option.globalstrict) {
- return true;
- }
- return false;
- },
- allowsGlobalUsd: function() {
- return this.option.strict === "global" || this.option.globalstrict ||
- this.option.module || this.impliedClosure();
- },
- /**
- * Determine if the current configuration describes an environment that is
- * wrapped in an immediately-invoked function expression prior to evaluation.
- *
- * @returns {boolean}
- */
- impliedClosure: function() {
- return this.option.node || this.option.phantom || this.option.browserify;
- },
- // Assumption: chronologically ES3 < ES5 < ES6 < Moz
- inMoz: function() {
- return this.option.moz;
- },
- /**
- * Determine if constructs introduced in ECMAScript 11 should be accepted.
- *
- * @returns {boolean}
- */
- inES11: function() {
- return this.esVersion >= 11;
- },
- /**
- * Determine if constructs introduced in ECMAScript 10 should be accepted.
- *
- * @returns {boolean}
- */
- inES10: function() {
- return this.esVersion >= 10;
- },
- /**
- * Determine if constructs introduced in ECMAScript 9 should be accepted.
- *
- * @returns {boolean}
- */
- inES9: function() {
- return this.esVersion >= 9;
- },
- /**
- * Determine if constructs introduced in ECMAScript 8 should be accepted.
- *
- * @returns {boolean}
- */
- inES8: function() {
- return this.esVersion >= 8;
- },
- /**
- * Determine if constructs introduced in ECMAScript 7 should be accepted.
- *
- * @returns {boolean}
- */
- inES7: function() {
- return this.esVersion >= 7;
- },
- /**
- * Determine if constructs introduced in ECMAScript 6 should be accepted.
- *
- * @param {boolean} strict - When `true`, do not interpret the `moz` option
- * as ECMAScript 6
- *
- * @returns {boolean}
- */
- inES6: function(strict) {
- if (!strict && this.option.moz) {
- return true;
- }
- return this.esVersion >= 6;
- },
- /**
- * Determine if constructs introduced in ECMAScript 5 should be accepted.
- *
- * @returns {boolean}
- */
- inES5: function() {
- return !this.esVersion || this.esVersion >= 5 || this.option.moz;
- },
- /**
- * Determine the current version of the input language by inspecting the
- * value of all ECMAScript-version-related options. This logic is necessary
- * to ensure compatibility with deprecated options `es3`, `es5`, and
- * `esnext`, and it may be drastically simplified when those options are
- * removed.
- *
- * @returns {string|null} - the name of any incompatible option detected,
- * `null` otherwise
- */
- inferEsVersion: function() {
- var badOpt = null;
- if (this.option.esversion) {
- if (this.option.es3) {
- badOpt = "es3";
- } else if (this.option.es5) {
- badOpt = "es5";
- } else if (this.option.esnext) {
- badOpt = "esnext";
- }
- if (badOpt) {
- return badOpt;
- }
- if (this.option.esversion === 2015) {
- this.esVersion = 6;
- } else {
- this.esVersion = this.option.esversion;
- }
- } else if (this.option.es3) {
- this.esVersion = 3;
- } else if (this.option.esnext) {
- this.esVersion = 6;
- }
- return null;
- },
- reset: function() {
- this.tokens = {
- prev: null,
- next: null,
- curr: null
- };
- this.option = { unstable: {} };
- this.esVersion = 5;
- this.funct = null;
- this.ignored = {};
- /**
- * A lookup table for active directives whose keys are the value of the
- * directives and whose values are the tokens which enabled the directives.
- */
- this.directive = Object.create(null);
- this.jsonMode = false;
- this.lines = [];
- this.tab = "";
- this.cache = {}; // Node.JS doesn't have Map. Sniff.
- this.ignoredLines = {};
- this.forinifcheckneeded = false;
- this.nameStack = new NameStack();
- this.inClassBody = false;
- }
- };
- exports.state = state;
- },{"./name-stack.js":19}],25:[function(require,module,exports){
- "use strict";
- exports.register = function(linter) {
- // Check for properties named __proto__. This special property was
- // deprecated and then re-introduced for ES6.
- linter.on("Identifier", function style_scanProto(data) {
- if (linter.getOption("proto")) {
- return;
- }
- if (data.name === "__proto__") {
- linter.warn("W103", {
- line: data.line,
- char: data.char,
- data: [ data.name, "6" ]
- });
- }
- });
- // Check for properties named __iterator__. This is a special property
- // available only in browsers with JavaScript 1.7 implementation, but
- // it is deprecated for ES6
- linter.on("Identifier", function style_scanIterator(data) {
- if (linter.getOption("iterator")) {
- return;
- }
- if (data.name === "__iterator__") {
- linter.warn("W103", {
- line: data.line,
- char: data.char,
- data: [ data.name ]
- });
- }
- });
- // Check that all identifiers are using camelCase notation.
- // Exceptions: names like MY_VAR and _myVar.
- linter.on("Identifier", function style_scanCamelCase(data) {
- if (!linter.getOption("camelcase")) {
- return;
- }
- if (data.name.replace(/^_+|_+$/g, "").indexOf("_") > -1 && !data.name.match(/^[A-Z0-9_]*$/)) {
- linter.warn("W106", {
- line: data.line,
- char: data.char,
- data: [ data.name ]
- });
- }
- });
- // Enforce consistency in style of quoting.
- linter.on("String", function style_scanQuotes(data) {
- var quotmark = linter.getOption("quotmark");
- var code;
- if (!quotmark) {
- return;
- }
- // If quotmark is set to 'single' warn about all double-quotes.
- if (quotmark === "single" && data.quote !== "'") {
- code = "W109";
- }
- // If quotmark is set to 'double' warn about all single-quotes.
- if (quotmark === "double" && data.quote !== "\"") {
- code = "W108";
- }
- // If quotmark is set to true, remember the first quotation style
- // and then warn about all others.
- if (quotmark === true) {
- if (!linter.getCache("quotmark")) {
- linter.setCache("quotmark", data.quote);
- }
- if (linter.getCache("quotmark") !== data.quote) {
- code = "W110";
- }
- }
- if (code) {
- linter.warn(code, {
- line: data.line,
- char: data.char,
- });
- }
- });
- linter.on("Number", function style_scanNumbers(data) {
- if (data.value.charAt(0) === ".") {
- // Warn about a leading decimal point.
- linter.warn("W008", {
- line: data.line,
- char: data.char,
- data: [ data.value ]
- });
- }
- if (data.value.substr(data.value.length - 1) === ".") {
- // Warn about a trailing decimal point.
- linter.warn("W047", {
- line: data.line,
- char: data.char,
- data: [ data.value ]
- });
- }
- if (/^00+/.test(data.value)) {
- // Multiple leading zeroes.
- linter.warn("W046", {
- line: data.line,
- char: data.char,
- data: [ data.value ]
- });
- }
- });
- // Warn about script URLs.
- linter.on("String", function style_scanJavaScriptURLs(data) {
- var re = /^(?:javascript|jscript|ecmascript|vbscript|livescript)\s*:/i;
- if (linter.getOption("scripturl")) {
- return;
- }
- if (re.test(data.value)) {
- linter.warn("W107", {
- line: data.line,
- char: data.char
- });
- }
- });
- };
- },{}],26:[function(require,module,exports){
- /*
- * Determine whether a given string is a valid UnicodePropertyValueExpression.
- */
- "use strict";
- module.exports = function validate(sequence) {
- var equalSignIndex = sequence.indexOf("=");
- if (equalSignIndex === -1) {
- return sequence in names.binary || sequence in values.general;
- }
- var name = sequence.substr(0, equalSignIndex);
- var value = sequence.substr(equalSignIndex + 1);
- if (name === "General_Category" || name === "gc") {
- return value in values.general;
- } if (name === "Script" || name === "sc" || name === "Script_Extensions" || name === "scx") {
- return value in values.script;
- }
- return false;
- };
- var names = {
- nonBinary: Object.create(null),
- binary: Object.create(null)
- };
- var values = {
- general: Object.create(null),
- script: Object.create(null)
- };
- var nb = names.nonBinary;
- nb.General_Category = true;
- nb.gc = true;
- nb.Script = true;
- nb.sc = true;
- nb.Script_Extensions = true;
- nb.scx = true;
- var b = names.binary;
- b.ASCII = true;
- b.ASCII_Hex_Digit = true;
- b.AHex = true;
- b.Alphabetic = true;
- b.Alpha = true;
- b.Any = true;
- b.Assigned = true;
- b.Bidi_Control = true;
- b.Bidi_C = true;
- b.Bidi_Mirrored = true;
- b.Bidi_M = true;
- b.Case_Ignorable = true;
- b.CI = true;
- b.Cased = true;
- b.Changes_When_Casefolded = true;
- b.CWCF = true;
- b.Changes_When_Casemapped = true;
- b.CWCM = true;
- b.Changes_When_Lowercased = true;
- b.CWL = true;
- b.Changes_When_NFKC_Casefolded = true;
- b.CWKCF = true;
- b.Changes_When_Titlecased = true;
- b.CWT = true;
- b.Changes_When_Uppercased = true;
- b.CWU = true;
- b.Dash = true;
- b.Default_Ignorable_Code_Point = true;
- b.DI = true;
- b.Deprecated = true;
- b.Dep = true;
- b.Diacritic = true;
- b.Dia = true;
- b.Emoji = true;
- b.Emoji_Component = true;
- b.EComp = true;
- b.Emoji_Modifier = true;
- b.EMod = true;
- b.Emoji_Modifier_Base = true;
- b.EBase = true;
- b.Emoji_Presentation = true;
- b.EPres = true;
- b.Extended_Pictographic = true;
- b.ExtPict = true;
- b.Extender = true;
- b.Ext = true;
- b.Grapheme_Base = true;
- b.Gr_Base = true;
- b.Grapheme_Extend = true;
- b.Gr_Ext = true;
- b.Hex_Digit = true;
- b.Hex = true;
- b.IDS_Binary_Operator = true;
- b.IDSB = true;
- b.IDS_Trinary_Operator = true;
- b.IDST = true;
- b.ID_Continue = true;
- b.IDC = true;
- b.ID_Start = true;
- b.IDS = true;
- b.Ideographic = true;
- b.Ideo = true;
- b.Join_Control = true;
- b.Join_C = true;
- b.Logical_Order_Exception = true;
- b.LOE = true;
- b.Lowercase = true;
- b.Lower = true;
- b.Math = true;
- b.Noncharacter_Code_Point = true;
- b.NChar = true;
- b.Pattern_Syntax = true;
- b.Pat_Syn = true;
- b.Pattern_White_Space = true;
- b.Pat_WS = true;
- b.Quotation_Mark = true;
- b.QMark = true;
- b.Radical = true;
- b.Regional_Indicator = true;
- b.RI = true;
- b.Sentence_Terminal = true;
- b.STerm = true;
- b.Soft_Dotted = true;
- b.SD = true;
- b.Terminal_Punctuation = true;
- b.Term = true;
- b.Unified_Ideograph = true;
- b.UIdeo = true;
- b.Uppercase = true;
- b.Upper = true;
- b.Variation_Selector = true;
- b.VS = true;
- b.White_Space = true;
- b.space = true;
- b.XID_Continue = true;
- b.XIDC = true;
- b.XID_Start = true;
- b.XIDS = true;
- var g = values.general;
- g.Cased_Letter = true;
- g.LC = true;
- g.Close_Punctuation = true;
- g.Pe = true;
- g.Connector_Punctuation = true;
- g.Pc = true;
- g.Control = true;
- g.Cc = true;
- g.cntrl = true;
- g.Currency_Symbol = true;
- g.Sc = true;
- g.Dash_Punctuation = true;
- g.Pd = true;
- g.Decimal_Number = true;
- g.Nd = true;
- g.digit = true;
- g.Enclosing_Mark = true;
- g.Me = true;
- g.Final_Punctuation = true;
- g.Pf = true;
- g.Format = true;
- g.Cf = true;
- g.Initial_Punctuation = true;
- g.Pi = true;
- g.Letter = true;
- g.L = true;
- g.Letter_Number = true;
- g.Nl = true;
- g.Line_Separator = true;
- g.Zl = true;
- g.Lowercase_Letter = true;
- g.Ll = true;
- g.Mark = true;
- g.M = true;
- g.Combining_Mark = true;
- g.Math_Symbol = true;
- g.Sm = true;
- g.Modifier_Letter = true;
- g.Lm = true;
- g.Modifier_Symbol = true;
- g.Sk = true;
- g.Nonspacing_Mark = true;
- g.Mn = true;
- g.Number = true;
- g.N = true;
- g.Open_Punctuation = true;
- g.Ps = true;
- g.Other = true;
- g.C = true;
- g.Other_Letter = true;
- g.Lo = true;
- g.Other_Number = true;
- g.No = true;
- g.Other_Punctuation = true;
- g.Po = true;
- g.Other_Symbol = true;
- g.So = true;
- g.Paragraph_Separator = true;
- g.Zp = true;
- g.Private_Use = true;
- g.Co = true;
- g.Punctuation = true;
- g.P = true;
- g.punct = true;
- g.Separator = true;
- g.Z = true;
- g.Space_Separator = true;
- g.Zs = true;
- g.Spacing_Mark = true;
- g.Mc = true;
- g.Surrogate = true;
- g.Cs = true;
- g.Symbol = true;
- g.S = true;
- g.Titlecase_Letter = true;
- g.Lt = true;
- g.Unassigned = true;
- g.Cn = true;
- g.Uppercase_Letter = true;
- g.Lu = true;
- var s = values.script;
- s.Adlam = true;
- s.Adlm = true;
- s.Ahom = true;
- s.Anatolian_Hieroglyphs = true;
- s.Hluw = true;
- s.Arabic = true;
- s.Arab = true;
- s.Armenian = true;
- s.Armn = true;
- s.Avestan = true;
- s.Avst = true;
- s.Balinese = true;
- s.Bali = true;
- s.Bamum = true;
- s.Bamu = true;
- s.Bassa_Vah = true;
- s.Bass = true;
- s.Batak = true;
- s.Batk = true;
- s.Bengali = true;
- s.Beng = true;
- s.Bhaiksuki = true;
- s.Bhks = true;
- s.Bopomofo = true;
- s.Bopo = true;
- s.Brahmi = true;
- s.Brah = true;
- s.Braille = true;
- s.Brai = true;
- s.Buginese = true;
- s.Bugi = true;
- s.Buhid = true;
- s.Buhd = true;
- s.Canadian_Aboriginal = true;
- s.Cans = true;
- s.Carian = true;
- s.Cari = true;
- s.Caucasian_Albanian = true;
- s.Aghb = true;
- s.Chakma = true;
- s.Cakm = true;
- s.Cham = true;
- s.Chorasmian = true;
- s.Chrs = true;
- s.Cherokee = true;
- s.Cher = true;
- s.Common = true;
- s.Zyyy = true;
- s.Coptic = true;
- s.Copt = true;
- s.Qaac = true;
- s.Cuneiform = true;
- s.Xsux = true;
- s.Cypriot = true;
- s.Cprt = true;
- s.Cyrillic = true;
- s.Cyrl = true;
- s.Deseret = true;
- s.Dsrt = true;
- s.Devanagari = true;
- s.Deva = true;
- s.Dives_Akuru = true;
- s.Diak = true;
- s.Dogra = true;
- s.Dogr = true;
- s.Duployan = true;
- s.Dupl = true;
- s.Egyptian_Hieroglyphs = true;
- s.Egyp = true;
- s.Elbasan = true;
- s.Elba = true;
- s.Elymaic = true;
- s.Elym = true;
- s.Ethiopic = true;
- s.Ethi = true;
- s.Georgian = true;
- s.Geor = true;
- s.Glagolitic = true;
- s.Glag = true;
- s.Gothic = true;
- s.Goth = true;
- s.Grantha = true;
- s.Gran = true;
- s.Greek = true;
- s.Grek = true;
- s.Gujarati = true;
- s.Gujr = true;
- s.Gunjala_Gondi = true;
- s.Gong = true;
- s.Gurmukhi = true;
- s.Guru = true;
- s.Han = true;
- s.Hani = true;
- s.Hangul = true;
- s.Hang = true;
- s.Hanifi_Rohingya = true;
- s.Rohg = true;
- s.Hanunoo = true;
- s.Hano = true;
- s.Hatran = true;
- s.Hatr = true;
- s.Hebrew = true;
- s.Hebr = true;
- s.Hiragana = true;
- s.Hira = true;
- s.Imperial_Aramaic = true;
- s.Armi = true;
- s.Inherited = true;
- s.Zinh = true;
- s.Qaai = true;
- s.Inscriptional_Pahlavi = true;
- s.Phli = true;
- s.Inscriptional_Parthian = true;
- s.Prti = true;
- s.Javanese = true;
- s.Java = true;
- s.Kaithi = true;
- s.Kthi = true;
- s.Kannada = true;
- s.Knda = true;
- s.Katakana = true;
- s.Kana = true;
- s.Kayah_Li = true;
- s.Kali = true;
- s.Kharoshthi = true;
- s.Khar = true;
- s.Khitan_Small_Script = true;
- s.Kits = true;
- s.Khmer = true;
- s.Khmr = true;
- s.Khojki = true;
- s.Khoj = true;
- s.Khudawadi = true;
- s.Sind = true;
- s.Lao = true;
- s.Laoo = true;
- s.Latin = true;
- s.Latn = true;
- s.Lepcha = true;
- s.Lepc = true;
- s.Limbu = true;
- s.Limb = true;
- s.Linear_A = true;
- s.Lina = true;
- s.Linear_B = true;
- s.Linb = true;
- s.Lisu = true;
- s.Lycian = true;
- s.Lyci = true;
- s.Lydian = true;
- s.Lydi = true;
- s.Mahajani = true;
- s.Mahj = true;
- s.Makasar = true;
- s.Maka = true;
- s.Malayalam = true;
- s.Mlym = true;
- s.Mandaic = true;
- s.Mand = true;
- s.Manichaean = true;
- s.Mani = true;
- s.Marchen = true;
- s.Marc = true;
- s.Medefaidrin = true;
- s.Medf = true;
- s.Masaram_Gondi = true;
- s.Gonm = true;
- s.Meetei_Mayek = true;
- s.Mtei = true;
- s.Mende_Kikakui = true;
- s.Mend = true;
- s.Meroitic_Cursive = true;
- s.Merc = true;
- s.Meroitic_Hieroglyphs = true;
- s.Mero = true;
- s.Miao = true;
- s.Plrd = true;
- s.Modi = true;
- s.Mongolian = true;
- s.Mong = true;
- s.Mro = true;
- s.Mroo = true;
- s.Multani = true;
- s.Mult = true;
- s.Myanmar = true;
- s.Mymr = true;
- s.Nabataean = true;
- s.Nbat = true;
- s.Nandinagari = true;
- s.Nand = true;
- s.New_Tai_Lue = true;
- s.Talu = true;
- s.Newa = true;
- s.Nko = true;
- s.Nkoo = true;
- s.Nushu = true;
- s.Nshu = true;
- s.Nyiakeng_Puachue_Hmong = true;
- s.Hmnp = true;
- s.Ogham = true;
- s.Ogam = true;
- s.Ol_Chiki = true;
- s.Olck = true;
- s.Old_Hungarian = true;
- s.Hung = true;
- s.Old_Italic = true;
- s.Ital = true;
- s.Old_North_Arabian = true;
- s.Narb = true;
- s.Old_Permic = true;
- s.Perm = true;
- s.Old_Persian = true;
- s.Xpeo = true;
- s.Old_Sogdian = true;
- s.Sogo = true;
- s.Old_South_Arabian = true;
- s.Sarb = true;
- s.Old_Turkic = true;
- s.Orkh = true;
- s.Oriya = true;
- s.Orya = true;
- s.Osage = true;
- s.Osge = true;
- s.Osmanya = true;
- s.Osma = true;
- s.Pahawh_Hmong = true;
- s.Hmng = true;
- s.Palmyrene = true;
- s.Palm = true;
- s.Pau_Cin_Hau = true;
- s.Pauc = true;
- s.Phags_Pa = true;
- s.Phag = true;
- s.Phoenician = true;
- s.Phnx = true;
- s.Psalter_Pahlavi = true;
- s.Phlp = true;
- s.Rejang = true;
- s.Rjng = true;
- s.Runic = true;
- s.Runr = true;
- s.Samaritan = true;
- s.Samr = true;
- s.Saurashtra = true;
- s.Saur = true;
- s.Sharada = true;
- s.Shrd = true;
- s.Shavian = true;
- s.Shaw = true;
- s.Siddham = true;
- s.Sidd = true;
- s.SignWriting = true;
- s.Sgnw = true;
- s.Sinhala = true;
- s.Sinh = true;
- s.Sogdian = true;
- s.Sogd = true;
- s.Sora_Sompeng = true;
- s.Sora = true;
- s.Soyombo = true;
- s.Soyo = true;
- s.Sundanese = true;
- s.Sund = true;
- s.Syloti_Nagri = true;
- s.Sylo = true;
- s.Syriac = true;
- s.Syrc = true;
- s.Tagalog = true;
- s.Tglg = true;
- s.Tagbanwa = true;
- s.Tagb = true;
- s.Tai_Le = true;
- s.Tale = true;
- s.Tai_Tham = true;
- s.Lana = true;
- s.Tai_Viet = true;
- s.Tavt = true;
- s.Takri = true;
- s.Takr = true;
- s.Tamil = true;
- s.Taml = true;
- s.Tangut = true;
- s.Tang = true;
- s.Telugu = true;
- s.Telu = true;
- s.Thaana = true;
- s.Thaa = true;
- s.Thai = true;
- s.Tibetan = true;
- s.Tibt = true;
- s.Tifinagh = true;
- s.Tfng = true;
- s.Tirhuta = true;
- s.Tirh = true;
- s.Ugaritic = true;
- s.Ugar = true;
- s.Vai = true;
- s.Vaii = true;
- s.Wancho = true;
- s.Wcho = true;
- s.Warang_Citi = true;
- s.Wara = true;
- s.Yezidi = true;
- s.Yezi = true;
- s.Yi = true;
- s.Yiii = true;
- s.Zanabazar_Square = true;
- s.Zanb = true;
- },{}],27:[function(require,module,exports){
- // jshint -W001
- "use strict";
- // Identifiers provided by the ECMAScript standard.
- exports.reservedVars = {
- NaN : false,
- undefined : false
- };
- exports.ecmaIdentifiers = {
- 3: {
- Array : false,
- Boolean : false,
- Date : false,
- decodeURI : false,
- decodeURIComponent : false,
- encodeURI : false,
- encodeURIComponent : false,
- Error : false,
- "eval" : false,
- EvalError : false,
- Function : false,
- hasOwnProperty : false,
- Infinity : false,
- isFinite : false,
- isNaN : false,
- Math : false,
- Number : false,
- Object : false,
- parseInt : false,
- parseFloat : false,
- RangeError : false,
- ReferenceError : false,
- RegExp : false,
- String : false,
- SyntaxError : false,
- TypeError : false,
- URIError : false
- },
- 5: {
- JSON : false
- },
- 6: {
- ArrayBuffer : false,
- DataView : false,
- Float32Array : false,
- Float64Array : false,
- Int8Array : false,
- Int16Array : false,
- Int32Array : false,
- Map : false,
- Promise : false,
- Proxy : false,
- Reflect : false,
- Set : false,
- Symbol : false,
- Uint8Array : false,
- Uint16Array : false,
- Uint32Array : false,
- Uint8ClampedArray : false,
- WeakMap : false,
- WeakSet : false
- },
- 8: {
- Atomics : false,
- SharedArrayBuffer : false
- },
- 11: {
- BigInt : false
- }
- };
- // Global variables commonly provided by a web browser environment.
- exports.browser = {
- Audio : false,
- Blob : false,
- addEventListener : false, // EventTarget
- applicationCache : false,
- atob : false, // WindowOrWorkerGlobalScope
- blur : false,
- btoa : false, // WindowOrWorkerGlobalScope
- cancelAnimationFrame : false,
- CanvasGradient : false,
- CanvasPattern : false,
- CanvasRenderingContext2D: false,
- CSS : false,
- CSSImportRule : false,
- CSSGroupingRule : false,
- CSSMarginRule : false,
- CSSMediaRule : false,
- CSSNamespaceRule : false,
- CSSPageRule : false,
- CSSRule : false,
- CSSRuleList : false,
- CSSStyleDeclaration : false,
- CSSStyleRule : false,
- CSSStyleSheet : false,
- clearInterval : false, // WindowOrWorkerGlobalScope
- clearTimeout : false, // WindowOrWorkerGlobalScope
- close : false,
- closed : false,
- Comment : false,
- CompositionEvent : false,
- createImageBitmap : false, // WindowOrWorkerGlobalScope
- CustomEvent : false,
- DOMParser : false,
- defaultStatus : false,
- dispatchEvent : false, // EventTarget
- Document : false,
- document : false,
- DocumentFragment : false,
- Element : false,
- ElementTimeControl : false,
- Event : false,
- event : false,
- fetch : false,
- File : false,
- FileList : false,
- FileReader : false,
- FormData : false,
- focus : false,
- frames : false,
- getComputedStyle : false,
- Headers : false,
- HTMLAnchorElement : false,
- HTMLAreaElement : false,
- HTMLAudioElement : false,
- HTMLBaseElement : false,
- HTMLBlockquoteElement: false,
- HTMLBodyElement : false,
- HTMLBRElement : false,
- HTMLButtonElement : false,
- HTMLCanvasElement : false,
- HTMLCollection : false,
- HTMLDataElement : false,
- HTMLDataListElement : false,
- HTMLDetailsElement : false,
- HTMLDialogElement : false,
- HTMLDirectoryElement : false,
- HTMLDivElement : false,
- HTMLDListElement : false,
- HTMLElement : false,
- HTMLEmbedElement : false,
- HTMLFieldSetElement : false,
- HTMLFontElement : false,
- HTMLFormElement : false,
- HTMLFrameElement : false,
- HTMLFrameSetElement : false,
- HTMLHeadElement : false,
- HTMLHeadingElement : false,
- HTMLHRElement : false,
- HTMLHtmlElement : false,
- HTMLIFrameElement : false,
- HTMLImageElement : false,
- HTMLInputElement : false,
- /* HTMLIsIndexElement was removed from the WHATWG HTML spec;
- see https://github.com/whatwg/html/pull/1095.
- HTMLIsIndexElement has been removed from browsers; see:
- • Chromium Removal: https://codereview.chromium.org/96653004/
- • Gecko Removal: https://bugzilla.mozilla.org/show_bug.cgi?id=1266495
- • WebKit Removal: https://bugs.webkit.org/show_bug.cgi?id=7139.
- See also the discussion at https://github.com/jshint/jshint/pull/3222. */
- HTMLIsIndexElement : false,
- HTMLLabelElement : false,
- HTMLLayerElement : false,
- HTMLLegendElement : false,
- HTMLLIElement : false,
- HTMLLinkElement : false,
- HTMLMapElement : false,
- HTMLMarqueeElement : false,
- HTMLMediaElement : false,
- HTMLMenuElement : false,
- HTMLMetaElement : false,
- HTMLMeterElement : false,
- HTMLModElement : false,
- HTMLObjectElement : false,
- HTMLOListElement : false,
- HTMLOptGroupElement : false,
- HTMLOptionElement : false,
- HTMLParagraphElement : false,
- HTMLParamElement : false,
- HTMLPictureElement : false,
- HTMLPreElement : false,
- HTMLProgressElement : false,
- HTMLQuoteElement : false,
- HTMLScriptElement : false,
- HTMLSelectElement : false,
- HTMLSlotElement : false,
- HTMLSourceElement : false,
- HTMLStyleElement : false,
- HTMLTableCaptionElement: false,
- HTMLTableCellElement : false,
- HTMLTableColElement : false,
- HTMLTableElement : false,
- HTMLTableRowElement : false,
- HTMLTableSectionElement: false,
- HTMLTemplateElement : false,
- HTMLTextAreaElement : false,
- HTMLTimeElement : false,
- HTMLTitleElement : false,
- HTMLTrackElement : false,
- HTMLUListElement : false,
- HTMLVideoElement : false,
- history : false,
- Image : false,
- IntersectionObserver : false,
- Intl : false,
- length : false,
- localStorage : false,
- location : false,
- matchMedia : false,
- MediaList : false,
- MediaRecorder : false,
- MessageChannel : false,
- MessageEvent : false,
- MessagePort : false,
- MouseEvent : false,
- moveBy : false,
- moveTo : false,
- MutationObserver : false,
- name : false,
- Node : false,
- NodeFilter : false,
- NodeList : false,
- Notification : false,
- navigator : false,
- onbeforeunload : true,
- onblur : true,
- onerror : true,
- onfocus : true,
- onload : true,
- onresize : true,
- onunload : true,
- open : false,
- openDatabase : false,
- opener : false,
- Option : false,
- origin : false, // WindowOrWorkerGlobalScope
- parent : false,
- performance : false,
- print : false,
- queueMicrotask : false, // WindowOrWorkerGlobalScope
- Range : false,
- requestAnimationFrame : false,
- removeEventListener : false, // EventTarget
- Request : false,
- resizeBy : false,
- resizeTo : false,
- Response : false,
- screen : false,
- scroll : false,
- scrollBy : false,
- scrollTo : false,
- sessionStorage : false,
- setInterval : false, // WindowOrWorkerGlobalScope
- setTimeout : false, // WindowOrWorkerGlobalScope
- SharedWorker : false,
- status : false,
- Storage : false,
- StyleSheet : false,
- SVGAElement : false,
- SVGAltGlyphDefElement: false,
- SVGAltGlyphElement : false,
- SVGAltGlyphItemElement: false,
- SVGAngle : false,
- SVGAnimateColorElement: false,
- SVGAnimateElement : false,
- SVGAnimateMotionElement: false,
- SVGAnimateTransformElement: false,
- SVGAnimatedAngle : false,
- SVGAnimatedBoolean : false,
- SVGAnimatedEnumeration: false,
- SVGAnimatedInteger : false,
- SVGAnimatedLength : false,
- SVGAnimatedLengthList: false,
- SVGAnimatedNumber : false,
- SVGAnimatedNumberList: false,
- SVGAnimatedPathData : false,
- SVGAnimatedPoints : false,
- SVGAnimatedPreserveAspectRatio: false,
- SVGAnimatedRect : false,
- SVGAnimatedString : false,
- SVGAnimatedTransformList: false,
- SVGAnimationElement : false,
- SVGCSSRule : false,
- SVGCircleElement : false,
- SVGClipPathElement : false,
- SVGColor : false,
- SVGColorProfileElement: false,
- SVGColorProfileRule : false,
- SVGComponentTransferFunctionElement: false,
- SVGCursorElement : false,
- SVGDefsElement : false,
- SVGDescElement : false,
- SVGDocument : false,
- SVGElement : false,
- SVGElementInstance : false,
- SVGElementInstanceList: false,
- SVGEllipseElement : false,
- SVGExternalResourcesRequired: false,
- SVGFEBlendElement : false,
- SVGFEColorMatrixElement: false,
- SVGFEComponentTransferElement: false,
- SVGFECompositeElement: false,
- SVGFEConvolveMatrixElement: false,
- SVGFEDiffuseLightingElement: false,
- SVGFEDisplacementMapElement: false,
- SVGFEDistantLightElement: false,
- SVGFEFloodElement : false,
- SVGFEFuncAElement : false,
- SVGFEFuncBElement : false,
- SVGFEFuncGElement : false,
- SVGFEFuncRElement : false,
- SVGFEGaussianBlurElement: false,
- SVGFEImageElement : false,
- SVGFEMergeElement : false,
- SVGFEMergeNodeElement: false,
- SVGFEMorphologyElement: false,
- SVGFEOffsetElement : false,
- SVGFEPointLightElement: false,
- SVGFESpecularLightingElement: false,
- SVGFESpotLightElement: false,
- SVGFETileElement : false,
- SVGFETurbulenceElement: false,
- SVGFilterElement : false,
- SVGFilterPrimitiveStandardAttributes: false,
- SVGFitToViewBox : false,
- SVGFontElement : false,
- SVGFontFaceElement : false,
- SVGFontFaceFormatElement: false,
- SVGFontFaceNameElement: false,
- SVGFontFaceSrcElement: false,
- SVGFontFaceUriElement: false,
- SVGForeignObjectElement: false,
- SVGGElement : false,
- SVGGlyphElement : false,
- SVGGlyphRefElement : false,
- SVGGradientElement : false,
- SVGHKernElement : false,
- SVGICCColor : false,
- SVGImageElement : false,
- SVGLangSpace : false,
- SVGLength : false,
- SVGLengthList : false,
- SVGLineElement : false,
- SVGLinearGradientElement: false,
- SVGLocatable : false,
- SVGMPathElement : false,
- SVGMarkerElement : false,
- SVGMaskElement : false,
- SVGMatrix : false,
- SVGMetadataElement : false,
- SVGMissingGlyphElement: false,
- SVGNumber : false,
- SVGNumberList : false,
- SVGPaint : false,
- SVGPathElement : false,
- SVGPathSeg : false,
- SVGPathSegArcAbs : false,
- SVGPathSegArcRel : false,
- SVGPathSegClosePath : false,
- SVGPathSegCurvetoCubicAbs: false,
- SVGPathSegCurvetoCubicRel: false,
- SVGPathSegCurvetoCubicSmoothAbs: false,
- SVGPathSegCurvetoCubicSmoothRel: false,
- SVGPathSegCurvetoQuadraticAbs: false,
- SVGPathSegCurvetoQuadraticRel: false,
- SVGPathSegCurvetoQuadraticSmoothAbs: false,
- SVGPathSegCurvetoQuadraticSmoothRel: false,
- SVGPathSegLinetoAbs : false,
- SVGPathSegLinetoHorizontalAbs: false,
- SVGPathSegLinetoHorizontalRel: false,
- SVGPathSegLinetoRel : false,
- SVGPathSegLinetoVerticalAbs: false,
- SVGPathSegLinetoVerticalRel: false,
- SVGPathSegList : false,
- SVGPathSegMovetoAbs : false,
- SVGPathSegMovetoRel : false,
- SVGPatternElement : false,
- SVGPoint : false,
- SVGPointList : false,
- SVGPolygonElement : false,
- SVGPolylineElement : false,
- SVGPreserveAspectRatio: false,
- SVGRadialGradientElement: false,
- SVGRect : false,
- SVGRectElement : false,
- SVGRenderingIntent : false,
- SVGSVGElement : false,
- SVGScriptElement : false,
- SVGSetElement : false,
- SVGStopElement : false,
- SVGStringList : false,
- SVGStylable : false,
- SVGStyleElement : false,
- SVGSwitchElement : false,
- SVGSymbolElement : false,
- SVGTRefElement : false,
- SVGTSpanElement : false,
- SVGTests : false,
- SVGTextContentElement: false,
- SVGTextElement : false,
- SVGTextPathElement : false,
- SVGTextPositioningElement: false,
- SVGTitleElement : false,
- SVGTransform : false,
- SVGTransformList : false,
- SVGTransformable : false,
- SVGURIReference : false,
- SVGUnitTypes : false,
- SVGUseElement : false,
- SVGVKernElement : false,
- SVGViewElement : false,
- SVGViewSpec : false,
- SVGZoomAndPan : false,
- Text : false,
- TextDecoder : false,
- TextEncoder : false,
- TimeEvent : false,
- top : false,
- URL : false,
- URLSearchParams : false,
- WebGLActiveInfo : false,
- WebGLBuffer : false,
- WebGLContextEvent : false,
- WebGLFramebuffer : false,
- WebGLProgram : false,
- WebGLRenderbuffer : false,
- WebGLRenderingContext: false,
- WebGLShader : false,
- WebGLShaderPrecisionFormat: false,
- WebGLTexture : false,
- WebGLUniformLocation : false,
- WebSocket : false,
- window : false,
- Window : false,
- Worker : false,
- XDomainRequest : false,
- XMLDocument : false,
- XMLHttpRequest : false,
- XMLSerializer : false,
- XPathEvaluator : false,
- XPathException : false,
- XPathExpression : false,
- XPathNamespace : false,
- XPathNSResolver : false,
- XPathResult : false
- };
- exports.devel = {
- alert : false,
- confirm: false,
- console: false,
- Debug : false,
- opera : false,
- prompt : false
- };
- exports.worker = {
- addEventListener : true, // EventTarget
- atob : true, // WindowOrWorkerGlobalScope
- btoa : true, // WindowOrWorkerGlobalScope
- clearInterval : true, // WindowOrWorkerGlobalScope
- clearTimeout : true, // WindowOrWorkerGlobalScope
- createImageBitmap : true, // WindowOrWorkerGlobalScope
- dispatchEvent : true, // EventTarget
- importScripts : true,
- onmessage : true,
- origin : true, // WindowOrWorkerGlobalScope
- postMessage : true,
- queueMicrotask : true, // WindowOrWorkerGlobalScope
- removeEventListener : true, // EventTarget
- self : true,
- setInterval : true, // WindowOrWorkerGlobalScope
- setTimeout : true, // WindowOrWorkerGlobalScope
- FileReaderSync : true
- };
- // Widely adopted global names that are not part of ECMAScript standard
- exports.nonstandard = {
- escape : false,
- unescape: false
- };
- // Globals provided by popular JavaScript environments.
- exports.couch = {
- "require" : false,
- respond : false,
- getRow : false,
- emit : false,
- send : false,
- start : false,
- sum : false,
- log : false,
- exports : false,
- module : false,
- provides : false
- };
- exports.node = {
- __filename : false,
- __dirname : false,
- arguments : false,
- GLOBAL : false,
- global : false,
- module : false,
- require : false,
- Intl : false,
- // These globals are writeable because Node allows the following
- // usage pattern: var Buffer = require("buffer").Buffer;
- Buffer : true,
- console : true,
- exports : true,
- process : true,
- setTimeout : true,
- clearTimeout : true,
- setInterval : true,
- clearInterval : true,
- setImmediate : true, // v0.9.1+
- clearImmediate : true, // v0.9.1+
- URL : true, // v6.13.0+
- URLSearchParams: true // v6.13.0+
- };
- exports.browserify = {
- __filename : false,
- __dirname : false,
- global : false,
- module : false,
- require : false,
- Buffer : true,
- exports : true,
- process : true
- };
- exports.phantom = {
- phantom : true,
- require : true,
- WebPage : true,
- console : true, // in examples, but undocumented
- exports : true // v1.7+
- };
- exports.qunit = {
- asyncTest : false,
- deepEqual : false,
- equal : false,
- expect : false,
- module : false,
- notDeepEqual : false,
- notEqual : false,
- notOk : false,
- notPropEqual : false,
- notStrictEqual : false,
- ok : false,
- propEqual : false,
- QUnit : false,
- raises : false,
- start : false,
- stop : false,
- strictEqual : false,
- test : false,
- "throws" : false
- };
- exports.rhino = {
- arguments : false,
- defineClass : false,
- deserialize : false,
- gc : false,
- help : false,
- importClass : false,
- importPackage: false,
- "java" : false,
- load : false,
- loadClass : false,
- Packages : false,
- print : false,
- quit : false,
- readFile : false,
- readUrl : false,
- runCommand : false,
- seal : false,
- serialize : false,
- spawn : false,
- sync : false,
- toint32 : false,
- version : false
- };
- exports.shelljs = {
- target : false,
- echo : false,
- exit : false,
- cd : false,
- pwd : false,
- ls : false,
- find : false,
- cp : false,
- rm : false,
- mv : false,
- mkdir : false,
- test : false,
- cat : false,
- sed : false,
- grep : false,
- which : false,
- dirs : false,
- pushd : false,
- popd : false,
- env : false,
- exec : false,
- chmod : false,
- config : false,
- error : false,
- tempdir : false
- };
- exports.typed = {
- ArrayBuffer : false,
- ArrayBufferView : false,
- DataView : false,
- Float32Array : false,
- Float64Array : false,
- Int16Array : false,
- Int32Array : false,
- Int8Array : false,
- Uint16Array : false,
- Uint32Array : false,
- Uint8Array : false,
- Uint8ClampedArray : false
- };
- exports.wsh = {
- ActiveXObject : true,
- Enumerator : true,
- GetObject : true,
- ScriptEngine : true,
- ScriptEngineBuildVersion : true,
- ScriptEngineMajorVersion : true,
- ScriptEngineMinorVersion : true,
- VBArray : true,
- WSH : true,
- WScript : true,
- XDomainRequest : true
- };
- // Globals provided by popular JavaScript libraries.
- exports.dojo = {
- dojo : false,
- dijit : false,
- dojox : false,
- define : false,
- "require": false
- };
- exports.jquery = {
- "$" : false,
- jQuery : false
- };
- exports.mootools = {
- "$" : false,
- "$$" : false,
- Asset : false,
- Browser : false,
- Chain : false,
- Class : false,
- Color : false,
- Cookie : false,
- Core : false,
- Document : false,
- DomReady : false,
- DOMEvent : false,
- DOMReady : false,
- Drag : false,
- Element : false,
- Elements : false,
- Event : false,
- Events : false,
- Fx : false,
- Group : false,
- Hash : false,
- HtmlTable : false,
- IFrame : false,
- IframeShim : false,
- InputValidator: false,
- instanceOf : false,
- Keyboard : false,
- Locale : false,
- Mask : false,
- MooTools : false,
- Native : false,
- Options : false,
- OverText : false,
- Request : false,
- Scroller : false,
- Slick : false,
- Slider : false,
- Sortables : false,
- Spinner : false,
- Swiff : false,
- Tips : false,
- Type : false,
- typeOf : false,
- URI : false,
- Window : false
- };
- exports.prototypejs = {
- "$" : false,
- "$$" : false,
- "$A" : false,
- "$F" : false,
- "$H" : false,
- "$R" : false,
- "$break" : false,
- "$continue" : false,
- "$w" : false,
- Abstract : false,
- Ajax : false,
- Class : false,
- Enumerable : false,
- Element : false,
- Event : false,
- Field : false,
- Form : false,
- Hash : false,
- Insertion : false,
- ObjectRange : false,
- PeriodicalExecuter: false,
- Position : false,
- Prototype : false,
- Selector : false,
- Template : false,
- Toggle : false,
- Try : false,
- Autocompleter : false,
- Builder : false,
- Control : false,
- Draggable : false,
- Draggables : false,
- Droppables : false,
- Effect : false,
- Sortable : false,
- SortableObserver : false,
- Sound : false,
- Scriptaculous : false
- };
- exports.yui = {
- YUI : false,
- Y : false,
- YUI_config: false
- };
- exports.mocha = {
- // Global (for config etc.)
- mocha : false,
- // BDD
- describe : false,
- xdescribe : false,
- context : false,
- xcontext : false,
- it : false,
- xit : false,
- specify : false,
- xspecify : false,
- before : false,
- after : false,
- beforeEach : false,
- afterEach : false,
- // TDD
- suite : false,
- test : false,
- setup : false,
- teardown : false,
- suiteSetup : false,
- suiteTeardown : false
- };
- exports.jasmine = {
- jasmine : false,
- describe : false,
- xdescribe : false,
- it : false,
- xit : false,
- beforeEach : false,
- afterEach : false,
- setFixtures : false,
- loadFixtures: false,
- spyOn : false,
- expect : false,
- // Jasmine 1.3
- runs : false,
- waitsFor : false,
- waits : false,
- // Jasmine 2.1
- beforeAll : false,
- afterAll : false,
- fail : false,
- fdescribe : false,
- fit : false,
- pending : false,
- // Jasmine 2.6
- spyOnProperty: false
- };
- },{}],"jshint":[function(require,module,exports){
- /*!
- * JSHint, by JSHint Community.
- *
- * Licensed under the MIT license.
- *
- * JSHint is a derivative work of JSLint:
- *
- * Copyright (c) 2002 Douglas Crockford (www.JSLint.com)
- *
- * Permission is hereby granted, free of charge, to any person obtaining
- * a copy of this software and associated documentation files (the "Software"),
- * to deal in the Software without restriction, including without limitation
- * the rights to use, copy, modify, merge, publish, distribute, sublicense,
- * and/or sell copies of the Software, and to permit persons to whom
- * the Software is furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included
- * in all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
- * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
- * DEALINGS IN THE SOFTWARE.
- *
- */
- /*jshint quotmark:double */
- /*exported console */
- var _ = require("lodash");
- var events = require("events");
- var vars = require("./vars.js");
- var messages = require("./messages.js");
- var Lexer = require("./lex.js").Lexer;
- var reg = require("./reg.js");
- var state = require("./state.js").state;
- var style = require("./style.js");
- var options = require("./options.js");
- var scopeManager = require("./scope-manager.js");
- var prodParams = require("./prod-params.js");
- // We need this module here because environments such as IE and Rhino
- // don't necessarilly expose the 'console' API and browserify uses
- // it to log things. It's a sad state of affair, really.
- var console = require("console-browserify");
- // We build the application inside a function so that we produce only a singleton
- // variable. That function will be invoked immediately, and its return value is
- // the JSHINT function itself.
- var JSHINT = (function() {
- "use strict";
- var api, // Extension API
- // These are operators that should not be used with the ! operator.
- bang = {
- "<" : true,
- "<=" : true,
- "==" : true,
- "===": true,
- "!==": true,
- "!=" : true,
- ">" : true,
- ">=" : true,
- "+" : true,
- "-" : true,
- "*" : true,
- "/" : true,
- "%" : true
- },
- declared, // Globals that were declared using /*global ... */ syntax.
- functions, // All of the functions
- inblock,
- indent,
- lookahead,
- lex,
- member,
- membersOnly,
- predefined, // Global variables defined by option
- extraModules = [],
- emitter = new events.EventEmitter();
- function checkOption(name, isStable, t) {
- var type, validNames;
- if (isStable) {
- type = "";
- validNames = options.validNames;
- } else {
- type = "unstable ";
- validNames = options.unstableNames;
- }
- name = name.trim();
- if (/^[+-]W\d{3}$/g.test(name)) {
- return true;
- }
- if (validNames.indexOf(name) === -1) {
- if (t.type !== "jslint" && !_.has(options.removed, name)) {
- error("E001", t, type, name);
- return false;
- }
- }
- return true;
- }
- function isString(obj) {
- return Object.prototype.toString.call(obj) === "[object String]";
- }
- function isIdentifier(tkn, value) {
- if (!tkn)
- return false;
- if (!tkn.identifier || tkn.value !== value)
- return false;
- return true;
- }
- /**
- * ES3 defined a set of "FutureReservedWords" in order "to allow for the
- * possibility of future adoption of [proposed] extensions."
- *
- * ES5 reduced the set of FutureReservedWords, in some cases by using them to
- * define new syntactic forms (e.g. `class` and `const`) and in other cases
- * by simply allowing their use as Identifiers (e.g. `int` and `goto`).
- * Separately, ES5 introduced new restrictions on certain tokens, but limited
- * the restriction to strict mode code (e.g. `let` and `yield`).
- *
- * This function determines if a given token describes a reserved word
- * according to the current state of the parser.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- * @param {Token} token
- */
- function isReserved(context, token) {
- if (!token.reserved) {
- return false;
- }
- var meta = token.meta;
- if (meta && meta.isFutureReservedWord) {
- if (state.inES5()) {
- // ES3 FutureReservedWord in an ES5 environment.
- if (!meta.es5) {
- return false;
- }
- if (token.isProperty) {
- return false;
- }
- }
- } else if (meta && meta.es5 && !state.inES5()) {
- return false;
- }
- // Some identifiers are reserved only within a strict mode environment.
- if (meta && meta.strictOnly && state.inES5()) {
- if (!state.option.strict && !state.isStrict()) {
- return false;
- }
- }
- if (token.id === "await" && (!(context & prodParams.async) && !state.option.module)) {
- return false;
- }
- if (token.id === "yield" && (!(context & prodParams.yield))) {
- return state.isStrict();
- }
- return true;
- }
- function supplant(str, data) {
- return str.replace(/\{([^{}]*)\}/g, function(a, b) {
- var r = data[b];
- return typeof r === "string" || typeof r === "number" ? r : a;
- });
- }
- function combine(dest, src) {
- Object.keys(src).forEach(function(name) {
- if (_.has(JSHINT.blacklist, name)) return;
- dest[name] = src[name];
- });
- }
- function processenforceall() {
- if (state.option.enforceall) {
- for (var enforceopt in options.bool.enforcing) {
- if (state.option[enforceopt] === undefined &&
- !options.noenforceall[enforceopt]) {
- state.option[enforceopt] = true;
- }
- }
- for (var relaxopt in options.bool.relaxing) {
- if (state.option[relaxopt] === undefined) {
- state.option[relaxopt] = false;
- }
- }
- }
- }
- /**
- * Apply all linting options according to the status of the `state` object.
- */
- function applyOptions() {
- var badESOpt = null;
- processenforceall();
- /**
- * TODO: Remove in JSHint 3
- */
- badESOpt = state.inferEsVersion();
- if (badESOpt) {
- quit("E059", state.tokens.next, "esversion", badESOpt);
- }
- if (state.inES5()) {
- combine(predefined, vars.ecmaIdentifiers[5]);
- }
- if (state.inES6()) {
- combine(predefined, vars.ecmaIdentifiers[6]);
- }
- if (state.inES8()) {
- combine(predefined, vars.ecmaIdentifiers[8]);
- }
- /**
- * Use `in` to check for the presence of any explicitly-specified value for
- * `globalstrict` because both `true` and `false` should trigger an error.
- */
- if (state.option.strict === "global" && "globalstrict" in state.option) {
- quit("E059", state.tokens.next, "strict", "globalstrict");
- }
- if (state.option.module) {
- /**
- * TODO: Extend this restriction to *all* ES6-specific options.
- */
- if (!state.inES6()) {
- warning("W134", state.tokens.next, "module", 6);
- }
- }
- if (state.option.regexpu) {
- /**
- * TODO: Extend this restriction to *all* ES6-specific options.
- */
- if (!state.inES6()) {
- warning("W134", state.tokens.next, "regexpu", 6);
- }
- }
- if (state.option.couch) {
- combine(predefined, vars.couch);
- }
- if (state.option.qunit) {
- combine(predefined, vars.qunit);
- }
- if (state.option.rhino) {
- combine(predefined, vars.rhino);
- }
- if (state.option.shelljs) {
- combine(predefined, vars.shelljs);
- combine(predefined, vars.node);
- }
- if (state.option.typed) {
- combine(predefined, vars.typed);
- }
- if (state.option.phantom) {
- combine(predefined, vars.phantom);
- }
- if (state.option.prototypejs) {
- combine(predefined, vars.prototypejs);
- }
- if (state.option.node) {
- combine(predefined, vars.node);
- combine(predefined, vars.typed);
- }
- if (state.option.devel) {
- combine(predefined, vars.devel);
- }
- if (state.option.dojo) {
- combine(predefined, vars.dojo);
- }
- if (state.option.browser) {
- combine(predefined, vars.browser);
- combine(predefined, vars.typed);
- }
- if (state.option.browserify) {
- combine(predefined, vars.browser);
- combine(predefined, vars.typed);
- combine(predefined, vars.browserify);
- }
- if (state.option.nonstandard) {
- combine(predefined, vars.nonstandard);
- }
- if (state.option.jasmine) {
- combine(predefined, vars.jasmine);
- }
- if (state.option.jquery) {
- combine(predefined, vars.jquery);
- }
- if (state.option.mootools) {
- combine(predefined, vars.mootools);
- }
- if (state.option.worker) {
- combine(predefined, vars.worker);
- }
- if (state.option.wsh) {
- combine(predefined, vars.wsh);
- }
- if (state.option.yui) {
- combine(predefined, vars.yui);
- }
- if (state.option.mocha) {
- combine(predefined, vars.mocha);
- }
- }
- // Produce an error warning.
- function quit(code, token, a, b) {
- var percentage = Math.floor((token.line / state.lines.length) * 100);
- var message = messages.errors[code].desc;
- var exception = {
- name: "JSHintError",
- line: token.line,
- character: token.from,
- message: message + " (" + percentage + "% scanned).",
- raw: message,
- code: code,
- a: a,
- b: b
- };
- exception.reason = supplant(message, exception) + " (" + percentage +
- "% scanned).";
- throw exception;
- }
- function removeIgnoredMessages() {
- var ignored = state.ignoredLines;
- if (_.isEmpty(ignored)) return;
- JSHINT.errors = _.reject(JSHINT.errors, function(err) { return ignored[err.line] });
- }
- function warning(code, t, a, b, c, d) {
- var ch, l, w, msg;
- if (/^W\d{3}$/.test(code)) {
- if (state.ignored[code])
- return;
- msg = messages.warnings[code];
- } else if (/E\d{3}/.test(code)) {
- msg = messages.errors[code];
- } else if (/I\d{3}/.test(code)) {
- msg = messages.info[code];
- }
- t = t || state.tokens.next || {};
- if (t.id === "(end)") { // `~
- t = state.tokens.curr;
- }
- l = t.line;
- ch = t.from;
- w = {
- id: "(error)",
- raw: msg.desc,
- code: msg.code,
- evidence: state.lines[l - 1] || "",
- line: l,
- character: ch,
- scope: JSHINT.scope,
- a: a,
- b: b,
- c: c,
- d: d
- };
- w.reason = supplant(msg.desc, w);
- JSHINT.errors.push(w);
- removeIgnoredMessages();
- var errors = JSHINT.errors.filter(function(e) { return /E\d{3}/.test(e.code); });
- if (errors.length >= state.option.maxerr) {
- quit("E043", t);
- }
- return w;
- }
- function warningAt(m, l, ch, a, b, c, d) {
- return warning(m, {
- line: l,
- from: ch
- }, a, b, c, d);
- }
- function error(m, t, a, b, c, d) {
- warning(m, t, a, b, c, d);
- }
- function errorAt(m, l, ch, a, b, c, d) {
- return error(m, {
- line: l,
- from: ch
- }, a, b, c, d);
- }
- // Tracking of "internal" scripts, like eval containing a static string
- function addEvalCode(elem, token) {
- JSHINT.internals.push({
- id: "(internal)",
- elem: elem,
- token: token,
- code: token.value.replace(/([^\\])(\\*)\2\\n/g, "$1\n")
- });
- }
- /**
- * Process an inline linting directive
- *
- * @param {Token} directiveToken - the directive-bearing comment token
- * @param {Token} previous - the token that preceeds the directive
- */
- function lintingDirective(directiveToken, previous) {
- var body = directiveToken.body.split(",")
- .map(function(s) { return s.trim(); });
- var predef = {};
- if (directiveToken.type === "falls through") {
- previous.caseFallsThrough = true;
- return;
- }
- if (directiveToken.type === "globals") {
- body.forEach(function(item, idx) {
- var parts = item.split(":");
- var key = parts[0].trim();
- if (key === "-" || !key.length) {
- // Ignore trailing comma
- if (idx > 0 && idx === body.length - 1) {
- return;
- }
- error("E002", directiveToken);
- return;
- }
- if (key.charAt(0) === "-") {
- key = key.slice(1);
- JSHINT.blacklist[key] = key;
- delete predefined[key];
- } else {
- predef[key] = parts.length > 1 && parts[1].trim() === "true";
- }
- });
- combine(predefined, predef);
- for (var key in predef) {
- if (_.has(predef, key)) {
- declared[key] = directiveToken;
- }
- }
- }
- if (directiveToken.type === "exported") {
- body.forEach(function(e, idx) {
- if (!e.length) {
- // Ignore trailing comma
- if (idx > 0 && idx === body.length - 1) {
- return;
- }
- error("E002", directiveToken);
- return;
- }
- state.funct["(scope)"].addExported(e);
- });
- }
- if (directiveToken.type === "members") {
- membersOnly = membersOnly || {};
- body.forEach(function(m) {
- var ch1 = m.charAt(0);
- var ch2 = m.charAt(m.length - 1);
- if (ch1 === ch2 && (ch1 === "\"" || ch1 === "'")) {
- m = m
- .substr(1, m.length - 2)
- .replace("\\\"", "\"");
- }
- membersOnly[m] = false;
- });
- }
- var numvals = [
- "maxstatements",
- "maxparams",
- "maxdepth",
- "maxcomplexity",
- "maxerr",
- "maxlen",
- "indent"
- ];
- if (directiveToken.type === "jshint" || directiveToken.type === "jslint" ||
- directiveToken.type === "jshint.unstable") {
- body.forEach(function(item) {
- var parts = item.split(":");
- var key = parts[0].trim();
- var val = parts.length > 1 ? parts[1].trim() : "";
- var numberVal;
- if (!checkOption(key, directiveToken.type !== "jshint.unstable", directiveToken)) {
- return;
- }
- if (numvals.indexOf(key) >= 0) {
- // GH988 - numeric options can be disabled by setting them to `false`
- if (val !== "false") {
- numberVal = +val;
- if (typeof numberVal !== "number" || !isFinite(numberVal) ||
- numberVal <= 0 || Math.floor(numberVal) !== numberVal) {
- error("E032", directiveToken, val);
- return;
- }
- state.option[key] = numberVal;
- } else {
- state.option[key] = key === "indent" ? 4 : false;
- }
- return;
- }
- if (key === "validthis") {
- // `validthis` is valid only within a function scope.
- if (state.funct["(global)"])
- return void error("E009");
- if (val !== "true" && val !== "false")
- return void error("E002", directiveToken);
- state.option.validthis = (val === "true");
- return;
- }
- if (key === "quotmark") {
- switch (val) {
- case "true":
- case "false":
- state.option.quotmark = (val === "true");
- break;
- case "double":
- case "single":
- state.option.quotmark = val;
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "shadow") {
- switch (val) {
- case "true":
- state.option.shadow = true;
- break;
- case "outer":
- state.option.shadow = "outer";
- break;
- case "false":
- case "inner":
- state.option.shadow = "inner";
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "unused") {
- switch (val) {
- case "true":
- state.option.unused = true;
- break;
- case "false":
- state.option.unused = false;
- break;
- case "vars":
- case "strict":
- state.option.unused = val;
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "latedef") {
- switch (val) {
- case "true":
- state.option.latedef = true;
- break;
- case "false":
- state.option.latedef = false;
- break;
- case "nofunc":
- state.option.latedef = "nofunc";
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "ignore") {
- switch (val) {
- case "line":
- state.ignoredLines[directiveToken.line] = true;
- removeIgnoredMessages();
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "strict") {
- switch (val) {
- case "true":
- state.option.strict = true;
- break;
- case "false":
- state.option.strict = false;
- break;
- case "global":
- case "implied":
- state.option.strict = val;
- break;
- default:
- error("E002", directiveToken);
- }
- return;
- }
- if (key === "module") {
- /**
- * TODO: Extend this restriction to *all* "environmental" options.
- */
- if (!hasParsedCode(state.funct)) {
- error("E055", directiveToken, "module");
- }
- }
- if (key === "esversion") {
- switch (val) {
- case "3":
- case "5":
- case "6":
- case "7":
- case "8":
- case "9":
- case "10":
- case "11":
- state.option.moz = false;
- state.option.esversion = +val;
- break;
- case "2015":
- case "2016":
- case "2017":
- case "2018":
- case "2019":
- case "2020":
- state.option.moz = false;
- // Translate specification publication year to version number.
- state.option.esversion = +val - 2009;
- break;
- default:
- error("E002", directiveToken);
- }
- if (!hasParsedCode(state.funct)) {
- error("E055", directiveToken, "esversion");
- }
- return;
- }
- var match = /^([+-])(W\d{3})$/g.exec(key);
- if (match) {
- // ignore for -W..., unignore for +W...
- state.ignored[match[2]] = (match[1] === "-");
- return;
- }
- var tn;
- if (val === "true" || val === "false") {
- if (directiveToken.type === "jslint") {
- tn = options.renamed[key] || key;
- state.option[tn] = (val === "true");
- if (options.inverted[tn] !== undefined) {
- state.option[tn] = !state.option[tn];
- }
- } else if (directiveToken.type === "jshint.unstable") {
- /* istanbul ignore next */
- state.option.unstable[key] = (val === "true");
- } else {
- state.option[key] = (val === "true");
- }
- return;
- }
- error("E002", directiveToken);
- });
- applyOptions();
- }
- }
- /**
- * Return a token beyond the token available in `state.tokens.next`. If no
- * such token exists, return the "(end)" token. This function is used to
- * determine parsing strategies in cases where the value of the next token
- * does not provide sufficient information, as is the case with `for` loops,
- * e.g.:
- *
- * for ( var i in ...
- *
- * versus:
- *
- * for ( var i = ...
- *
- * @param {number} [p] - offset of desired token; defaults to 0
- *
- * @returns {token}
- */
- function peek(p) {
- var i = p || 0, j = lookahead.length, t;
- if (i < j) {
- return lookahead[i];
- }
- while (j <= i) {
- t = lex.token();
- // When the lexer is exhausted, this function should produce the "(end)"
- // token, even in cases where the requested token is beyond the end of
- // the input stream.
- if (!t) {
- // If the lookahead buffer is empty, the expected "(end)" token was
- // already emitted by the most recent invocation of `advance` and is
- // available as the next token.
- if (!lookahead.length) {
- return state.tokens.next;
- }
- return lookahead[j - 1];
- }
- lookahead[j] = t;
- j += 1;
- }
- return t;
- }
- function peekIgnoreEOL() {
- var i = 0;
- var t;
- do {
- t = peek(i++);
- } while (t.id === "(endline)");
- return t;
- }
- /**
- * Consume the next token.
- *
- * @param {string} [expected] - the expected value of the next token's `id`
- * property (in the case of punctuators) or
- * `value` property (in the case of identifiers
- * and literals); if unspecified, any token will
- * be accepted
- * @param {object} [relatedToken] - the token that informed the expected
- * value, if any (for example: the opening
- * brace when a closing brace is expected);
- * used to produce more meaningful errors
- */
- function advance(expected, relatedToken) {
- var nextToken = state.tokens.next;
- if (expected && nextToken.id !== expected) {
- if (relatedToken) {
- if (nextToken.id === "(end)") {
- error("E019", relatedToken, relatedToken.id);
- } else {
- error("E020", nextToken, expected, relatedToken.id,
- relatedToken.line, nextToken.value);
- }
- } else if (nextToken.type !== "(identifier)" || nextToken.value !== expected) {
- error("E021", nextToken, expected, nextToken.value);
- }
- }
- state.tokens.prev = state.tokens.curr;
- state.tokens.curr = state.tokens.next;
- for (;;) {
- state.tokens.next = lookahead.shift() || lex.token();
- if (!state.tokens.next) { // No more tokens left, give up
- quit("E041", state.tokens.curr);
- }
- if (state.tokens.next.id === "(end)" || state.tokens.next.id === "(error)") {
- return;
- }
- if (state.tokens.next.check) {
- state.tokens.next.check();
- }
- if (state.tokens.next.isSpecial) {
- lintingDirective(state.tokens.next, state.tokens.curr);
- } else {
- if (state.tokens.next.id !== "(endline)") {
- break;
- }
- }
- }
- }
- /**
- * Determine whether a given token is an operator.
- *
- * @param {token} token
- *
- * @returns {boolean}
- */
- function isOperator(token) {
- return token.first || token.right || token.left || token.id === "yield" || token.id === "await";
- }
- function isEndOfExpr(context, curr, next) {
- if (arguments.length <= 1) {
- curr = state.tokens.curr;
- next = state.tokens.next;
- }
- if (next.id === "in" && context & prodParams.noin) {
- return true;
- }
- if (next.id === ";" || next.id === "}" || next.id === ":") {
- return true;
- }
- if (next.infix === curr.infix ||
- // Infix operators which follow `yield` should only be consumed as part
- // of the current expression if allowed by the syntactic grammar. In
- // effect, this prevents automatic semicolon insertion when `yield` is
- // followed by a newline and a comma operator (without enabling it when
- // `yield` is followed by a newline and a `[` token).
- (curr.id === "yield" && curr.rbp < next.rbp)) {
- return !sameLine(curr, next);
- }
- return false;
- }
- /**
- * The `expression` function is the heart of JSHint's parsing behaior. It is
- * based on the Pratt parser, but it extends that model with a `fud` method.
- * Short for "first null denotation," it it similar to the `nud` ("null
- * denotation") function, but it is only used on the first token of a
- * statement. This simplifies usage in statement-oriented languages like
- * JavaScript.
- *
- * .nud Null denotation
- * .fud First null denotation
- * .led Left denotation
- * lbp Left binding power
- * rbp Right binding power
- *
- * They are elements of the parsing method called Top Down Operator Precedence.
- *
- * In addition to parsing, this function applies a number of linting patterns.
- *
- * @param {number} context - the parsing context (a bitfield describing
- * conditions of the current parsing operation
- * which can influence how the next tokens are
- * interpreted); see `prod-params.js` for more
- * detail)
- * @param {number} rbp - the right-binding power of the token to be consumed
- */
- function expression(context, rbp) {
- var left, isArray = false, isObject = false;
- var initial = context & prodParams.initial;
- var curr;
- context &= ~prodParams.initial;
- state.nameStack.push();
- if (state.tokens.next.id === "(end)")
- error("E006", state.tokens.curr);
- advance();
- if (initial) {
- state.funct["(verb)"] = state.tokens.curr.value;
- state.tokens.curr.beginsStmt = true;
- }
- curr = state.tokens.curr;
- if (initial && curr.fud && (!curr.useFud || curr.useFud(context))) {
- left = state.tokens.curr.fud(context);
- } else {
- if (state.tokens.curr.nud) {
- left = state.tokens.curr.nud(context, rbp);
- } else {
- error("E030", state.tokens.curr, state.tokens.curr.id);
- }
- while (rbp < state.tokens.next.lbp && !isEndOfExpr(context)) {
- isArray = state.tokens.curr.value === "Array";
- isObject = state.tokens.curr.value === "Object";
- // #527, new Foo.Array(), Foo.Array(), new Foo.Object(), Foo.Object()
- // Line breaks in IfStatement heads exist to satisfy the checkJSHint
- // "Line too long." error.
- if (left && (left.value || (left.first && left.first.value))) {
- // If the left.value is not "new", or the left.first.value is a "."
- // then safely assume that this is not "new Array()" and possibly
- // not "new Object()"...
- if (left.value !== "new" ||
- (left.first && left.first.value && left.first.value === ".")) {
- isArray = false;
- // ...In the case of Object, if the left.value and state.tokens.curr.value
- // are not equal, then safely assume that this not "new Object()"
- if (left.value !== state.tokens.curr.value) {
- isObject = false;
- }
- }
- }
- advance();
- if (isArray && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
- warning("W009", state.tokens.curr);
- }
- if (isObject && state.tokens.curr.id === "(" && state.tokens.next.id === ")") {
- warning("W010", state.tokens.curr);
- }
- if (left && state.tokens.curr.led) {
- left = state.tokens.curr.led(context, left);
- } else {
- error("E033", state.tokens.curr, state.tokens.curr.id);
- }
- }
- }
- state.nameStack.pop();
- return left;
- }
- // Functions for conformance of style.
- function sameLine(first, second) {
- return first.line === (second.startLine || second.line);
- }
- function nobreaknonadjacent(left, right) {
- if (!state.option.laxbreak && !sameLine(left, right)) {
- warning("W014", right, right.value);
- }
- }
- function nolinebreak(t) {
- if (!sameLine(t, state.tokens.next)) {
- warning("E022", t, t.value);
- }
- }
- /**
- * Validate the comma token in the "current" position of the token stream.
- *
- * @param {object} [opts]
- * @param {boolean} [opts.property] - flag indicating whether the current
- * comma token is situated directly within
- * an object initializer
- * @param {boolean} [opts.allowTrailing] - flag indicating whether the
- * current comma token may appear
- * directly before a delimiter
- *
- * @returns {boolean} flag indicating the validity of the current comma
- * token; `false` if the token directly causes a syntax
- * error, `true` otherwise
- */
- function checkComma(opts) {
- var prev = state.tokens.prev;
- var curr = state.tokens.curr;
- opts = opts || {};
- if (!sameLine(prev, curr)) {
- if (!state.option.laxcomma) {
- if (checkComma.first) {
- warning("I001", curr);
- checkComma.first = false;
- }
- warning("W014", prev, curr.value);
- }
- }
- if (state.tokens.next.identifier && !(opts.property && state.inES5())) {
- // Keywords that cannot follow a comma operator.
- switch (state.tokens.next.value) {
- case "break":
- case "case":
- case "catch":
- case "continue":
- case "default":
- case "do":
- case "else":
- case "finally":
- case "for":
- case "if":
- case "in":
- case "instanceof":
- case "return":
- case "switch":
- case "throw":
- case "try":
- case "var":
- case "let":
- case "while":
- case "with":
- error("E024", state.tokens.next, state.tokens.next.value);
- return false;
- }
- }
- if (state.tokens.next.type === "(punctuator)") {
- switch (state.tokens.next.value) {
- case "}":
- case "]":
- case ",":
- case ")":
- if (opts.allowTrailing) {
- return true;
- }
- error("E024", state.tokens.next, state.tokens.next.value);
- return false;
- }
- }
- return true;
- }
- /**
- * Factory function for creating "symbols"--objects that will be inherited by
- * tokens. The objects created by this function are stored in a symbol table
- * and set as the prototype of the tokens generated by the lexer.
- *
- * Note that this definition of "symbol" describes an implementation detail
- * of JSHint and is not related to the ECMAScript value type introduced in
- * ES2015.
- *
- * @param {string} s - the name of the token; for keywords (e.g. `void`) and
- * delimiters (e.g.. `[`), this is the token's text
- * representation; for literals (e.g. numbers) and other
- * "special" tokens (e.g. the end-of-file marker) this is
- * a parenthetical value
- * @param {number} p - the left-binding power of the token as used by the
- * Pratt parsing semantics
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function symbol(s, p) {
- var x = state.syntax[s];
- if (!x || typeof x !== "object") {
- state.syntax[s] = x = {
- id: s,
- lbp: p,
- // Symbols that accept a right-hand side do so with a binding power
- // that is commonly identical to their left-binding power. (This value
- // is relevant when determining if the grouping operator is necessary
- // to override the precedence of surrounding operators.) Because the
- // exponentiation operator's left-binding power and right-binding power
- // are distinct, the values must be encoded separately.
- rbp: p,
- value: s
- };
- }
- return x;
- }
- /**
- * Convenience function for defining delimiter symbols.
- *
- * @param {string} s - the name of the symbol
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function delim(s) {
- var x = symbol(s, 0);
- x.delim = true;
- return x;
- }
- /**
- * Convenience function for defining statement-denoting symbols.
- *
- * @param {string} s - the name of the symbol
- * @param {function} f - the first null denotation function for the symbol;
- * see the `expression` function for more detail
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function stmt(s, f) {
- var x = delim(s);
- x.identifier = x.reserved = true;
- x.fud = f;
- return x;
- }
- /**
- * Convenience function for defining block-statement-denoting symbols.
- *
- * A block-statement-denoting symbol is one like 'if' or 'for', which will be
- * followed by a block and will not have to end with a semicolon.
- *
- * @param {string} s - the name of the symbol
- * @param {function} - the first null denotation function for the symbol; see
- * the `expression` function for more detail
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function blockstmt(s, f) {
- var x = stmt(s, f);
- x.block = true;
- return x;
- }
- /**
- * Denote a given JSHint symbol as an identifier and a reserved keyword.
- *
- * @param {object} - a JSHint symbol value
- *
- * @returns {object} - the provided object
- */
- function reserveName(x) {
- var c = x.id.charAt(0);
- if ((c >= "a" && c <= "z") || (c >= "A" && c <= "Z")) {
- x.identifier = x.reserved = true;
- }
- return x;
- }
- /**
- * Convenience function for defining "prefix" symbols--operators that accept
- * expressions as a right-hand side.
- *
- * @param {string} s - the name of the symbol
- * @param {function} [f] - the first null denotation function for the symbol;
- * see the `expression` function for more detail
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function prefix(s, f) {
- var x = symbol(s, 150);
- reserveName(x);
- x.nud = (typeof f === "function") ? f : function(context) {
- this.arity = "unary";
- this.right = expression(context, 150);
- if (this.id === "++" || this.id === "--") {
- if (state.option.plusplus) {
- warning("W016", this, this.id);
- }
- if (this.right) {
- checkLeftSideAssign(context, this.right, this);
- }
- }
- return this;
- };
- return x;
- }
- /**
- * Convenience function for defining "type" symbols--those that describe
- * literal values.
- *
- * @param {string} s - the name of the symbol
- * @param {function} f - the first null denotation function for the symbol;
- * see the `expression` function for more detail
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function type(s, f) {
- var x = symbol(s, 0);
- x.type = s;
- x.nud = f;
- return x;
- }
- /**
- * Convenience function for defining JSHint symbols for reserved
- * keywords--those that are restricted from use as bindings (and as property
- * names in ECMAScript 3 environments).
- *
- * @param {string} s - the name of the symbol
- * @param {function} func - the first null denotation function for the
- * symbol; see the `expression` function for more
- * detail
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function reserve(name, func) {
- var x = type(name, func);
- x.identifier = true;
- x.reserved = true;
- return x;
- }
- /**
- * Convenience function for defining JSHint symbols for keywords that are
- * only reserved in some circumstances.
- *
- * @param {string} name - the name of the symbol
- * @param {object} [meta] - a collection of optional arguments
- * @param {function} [meta.nud] -the null denotation function for the symbol;
- * see the `expression` function for more detail
- * @param {boolean} [meta.es5] - `true` if the identifier is reserved
- * in ECMAScript 5 or later
- * @param {boolean} [meta.strictOnly] - `true` if the identifier is only
- * reserved in strict mode code.
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function FutureReservedWord(name, meta) {
- var x = type(name, state.syntax["(identifier)"].nud);
- meta = meta || {};
- meta.isFutureReservedWord = true;
- x.value = name;
- x.identifier = true;
- x.reserved = true;
- x.meta = meta;
- return x;
- }
- /**
- * Convenience function for defining "infix" symbols--operators that require
- * operands as both "land-hand side" and "right-hand side".
- *
- * @param {string} s - the name of the symbol
- * @param {function} [f] - a function to be invoked that consumes the
- * right-hand side of the operator
- * @param {number} p - the left-binding power of the token as used by the
- * Pratt parsing semantics
- * @param {boolean} [w] - if `true`
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function infix(s, f, p, w) {
- var x = symbol(s, p);
- reserveName(x);
- x.infix = true;
- x.led = function(context, left) {
- if (!w) {
- nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
- }
- if ((s === "in" || s === "instanceof") && left.id === "!") {
- warning("W018", left, "!");
- }
- if (typeof f === "function") {
- return f(context, left, this);
- } else {
- this.left = left;
- this.right = expression(context, p);
- return this;
- }
- };
- return x;
- }
- /**
- * Convenience function for defining the `=>` token as used in arrow
- * functions.
- *
- * @param {string} s - the name of the symbol
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function application(s) {
- var x = symbol(s, 42);
- x.infix = true;
- x.led = function(context, left) {
- nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
- this.left = left;
- this.right = doFunction(context, { type: "arrow", loneArg: left });
- return this;
- };
- return x;
- }
- /**
- * Convenience function for defining JSHint symbols for relation operators.
- *
- * @param {string} s - the name of the symbol
- * @param {function} [f] - a function to be invoked to enforce any additional
- * linting rules.
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function relation(s, f) {
- var x = symbol(s, 100);
- x.infix = true;
- x.led = function(context, left) {
- nobreaknonadjacent(state.tokens.prev, state.tokens.curr);
- this.left = left;
- var right = this.right = expression(context, 100);
- if (isIdentifier(left, "NaN") || isIdentifier(right, "NaN")) {
- warning("W019", this);
- } else if (f) {
- f.apply(this, [context, left, right]);
- }
- if (!left || !right) {
- quit("E041", state.tokens.curr);
- }
- if (left.id === "!") {
- warning("W018", left, "!");
- }
- if (right.id === "!") {
- warning("W018", right, "!");
- }
- return this;
- };
- return x;
- }
- /**
- * Determine if a given token marks the beginning of a UnaryExpression.
- *
- * @param {object} token
- *
- * @returns {boolean}
- */
- function beginsUnaryExpression(token) {
- return token.arity === "unary" && token.id !== "++" && token.id !== "--";
- }
- var typeofValues = {};
- typeofValues.legacy = [
- // E4X extended the `typeof` operator to return "xml" for the XML and
- // XMLList types it introduced.
- // Ref: 11.3.2 The typeof Operator
- // http://www.ecma-international.org/publications/files/ECMA-ST/Ecma-357.pdf
- "xml",
- // IE<9 reports "unknown" when the `typeof` operator is applied to an
- // object existing across a COM+ bridge. In lieu of official documentation
- // (which does not exist), see:
- // http://robertnyman.com/2005/12/21/what-is-typeof-unknown/
- "unknown"
- ];
- typeofValues.es3 = [
- "undefined", "boolean", "number", "string", "function", "object",
- ];
- typeofValues.es3 = typeofValues.es3.concat(typeofValues.legacy);
- typeofValues.es6 = typeofValues.es3.concat("symbol", "bigint");
- /**
- * Validate comparisons between the result of a `typeof` expression and a
- * string literal.
- *
- * @param {token} [left] - one of the values being compared
- * @param {token} [right] - the other value being compared
- * @param {object} state - the global state object (see `state.js`)
- *
- * @returns {boolean} - `false` if the second token describes a `typeof`
- * expression and the first token is a string literal
- * whose value is never returned by that operator;
- * `true` otherwise
- */
- function isTypoTypeof(left, right, state) {
- var values;
- if (state.option.notypeof)
- return false;
- if (!left || !right)
- return false;
- values = state.inES6() ? typeofValues.es6 : typeofValues.es3;
- if (right.type === "(identifier)" && right.value === "typeof" && left.type === "(string)") {
- if (left.value === "bigint") {
- if (!state.inES11()) {
- warning("W119", left, "BigInt", "11");
- }
- return false;
- }
- return !_.includes(values, left.value);
- }
- return false;
- }
- /**
- * Determine if a given token describes the built-in `eval` function.
- *
- * @param {token} left
- * @param {object} state - the global state object (see `state.js`)
- *
- * @returns {boolean}
- */
- function isGlobalEval(left, state) {
- var isGlobal = false;
- // permit methods to refer to an "eval" key in their own context
- if (left.type === "this" && state.funct["(context)"] === null) {
- isGlobal = true;
- }
- // permit use of "eval" members of objects
- else if (left.type === "(identifier)") {
- if (state.option.node && left.value === "global") {
- isGlobal = true;
- }
- else if (state.option.browser && (left.value === "window" || left.value === "document")) {
- isGlobal = true;
- }
- }
- return isGlobal;
- }
- /**
- * Determine if a given token describes a property of a built-in object.
- *
- * @param {token} left
- *
- * @returns {boolean}
- */
- function findNativePrototype(left) {
- var natives = [
- "Array", "ArrayBuffer", "Boolean", "Collator", "DataView", "Date",
- "DateTimeFormat", "Error", "EvalError", "Float32Array", "Float64Array",
- "Function", "Infinity", "Intl", "Int16Array", "Int32Array", "Int8Array",
- "Iterator", "Number", "NumberFormat", "Object", "RangeError",
- "ReferenceError", "RegExp", "StopIteration", "String", "SyntaxError",
- "TypeError", "Uint16Array", "Uint32Array", "Uint8Array", "Uint8ClampedArray",
- "URIError"
- ];
- function walkPrototype(obj) {
- if (typeof obj !== "object") return;
- return obj.right === "prototype" ? obj : walkPrototype(obj.left);
- }
- function walkNative(obj) {
- while (!obj.identifier && typeof obj.left === "object")
- obj = obj.left;
- if (obj.identifier && natives.indexOf(obj.value) >= 0 &&
- state.funct["(scope)"].isPredefined(obj.value)) {
- return obj.value;
- }
- }
- var prototype = walkPrototype(left);
- if (prototype) return walkNative(prototype);
- }
- /**
- * Determine if the given token is a valid assignment target; emit errors
- * and/or warnings as appropriate
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- * @param {token} left - the left hand side of the assignment
- * @param {token=} assignToken - the token for the assignment, used for
- * reporting
- * @param {object=} options - optional object
- * @param {boolean} options.allowDestructuring - whether to allow
- * destructuring binding
- *
- * @returns {boolean} Whether the left hand side is OK
- */
- function checkLeftSideAssign(context, left, assignToken, options) {
- var allowDestructuring = options && options.allowDestructuring;
- assignToken = assignToken || left;
- if (state.option.freeze) {
- var nativeObject = findNativePrototype(left);
- if (nativeObject)
- warning("W121", left, nativeObject);
- }
- if (left.identifier && !left.isMetaProperty) {
- // The `reassign` method also calls `modify`, but we are specific in
- // order to catch function re-assignment and globals re-assignment
- state.funct["(scope)"].block.reassign(left.value, left);
- }
- if (left.id === ".") {
- if (!left.left || left.left.value === "arguments" && !state.isStrict()) {
- warning("W143", assignToken);
- }
- state.nameStack.set(state.tokens.prev);
- return true;
- } else if (left.id === "{" || left.id === "[") {
- if (!allowDestructuring || !left.destructAssign) {
- if (left.id === "{" || !left.left) {
- warning("E031", assignToken);
- } else if (left.left.value === "arguments" && !state.isStrict()) {
- warning("W143", assignToken);
- }
- }
- if (left.id === "[") {
- state.nameStack.set(left.right);
- }
- return true;
- } else if (left.identifier && !isReserved(context, left) && !left.isMetaProperty) {
- if (state.funct["(scope)"].bindingtype(left.value) === "exception") {
- warning("W022", left);
- }
- if (left.value === "eval" && state.isStrict()) {
- error("E031", assignToken);
- return false;
- } else if (left.value === "arguments") {
- if (!state.isStrict()) {
- warning("W143", assignToken);
- } else {
- error("E031", assignToken);
- return false;
- }
- }
- state.nameStack.set(left);
- return true;
- }
- error("E031", assignToken);
- return false;
- }
- /**
- * Convenience function for defining JSHint symbols for assignment operators.
- *
- * @param {string} s - the name of the symbol
- * @param {function} [f] - a function to be invoked that consumes the
- * right-hand side of the operator (see the `infix`
- * function)
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function assignop(s, f) {
- var x = infix(s, typeof f === "function" ? f : function(context, left, that) {
- that.left = left;
- checkLeftSideAssign(context, left, that, { allowDestructuring: true });
- that.right = expression(context, 10);
- return that;
- }, 20);
- x.exps = true;
- x.assign = true;
- return x;
- }
- /**
- * Convenience function for defining JSHint symbols for bitwise operators.
- *
- * @param {string} s - the name of the symbol
- * @param {function} [f] - the left denotation function for the symbol; see
- * the `expression` function for more detail
- * @param {number} p - the left-binding power of the token as used by the
- * Pratt parsing semantics
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function bitwise(s, f, p) {
- var x = symbol(s, p);
- reserveName(x);
- x.infix = true;
- x.led = (typeof f === "function") ? f : function(context, left) {
- if (state.option.bitwise) {
- warning("W016", this, this.id);
- }
- this.left = left;
- this.right = expression(context, p);
- return this;
- };
- return x;
- }
- /**
- * Convenience function for defining JSHint symbols for bitwise assignment
- * operators. See the `assignop` function for more detail.
- *
- * @param {string} s - the name of the symbol
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function bitwiseassignop(s) {
- symbol(s, 20).exps = true;
- return infix(s, function(context, left, that) {
- if (state.option.bitwise) {
- warning("W016", that, that.id);
- }
- checkLeftSideAssign(context, left, that);
- that.right = expression(context, 10);
- return that;
- }, 20);
- }
- /**
- * Convenience function for defining JSHint symbols for those operators which
- * have a single operand that appears before them in the source code.
- *
- * @param {string} s - the name of the symbol
- *
- * @returns {object} - the object describing the JSHint symbol (provided to
- * support cases where further refinement is necessary)
- */
- function suffix(s) {
- var x = symbol(s, 150);
- x.led = function(context, left) {
- // this = suffix e.g. "++" punctuator
- // left = symbol operated e.g. "a" identifier or "a.b" punctuator
- if (state.option.plusplus) {
- warning("W016", this, this.id);
- }
- checkLeftSideAssign(context, left, this);
- this.left = left;
- return this;
- };
- return x;
- }
- /**
- * Retrieve the value of the next token if it is an identifier and optionally
- * advance the parser.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- * @param {boolean} [isName] - `true` if an IdentifierName should be consumed
- * (e.g. object properties)
- * @param {boolean} [preserve] - `true` if the token should not be consumed
- *
- * @returns {string|undefined} - the value of the identifier, if present
- */
- function optionalidentifier(context, isName, preserve) {
- if (!state.tokens.next.identifier) {
- return;
- }
- if (!preserve) {
- advance();
- }
- var curr = state.tokens.curr;
- if (isReserved(context, curr) && !(isName && state.inES5())) {
- warning("W024", state.tokens.curr, state.tokens.curr.id);
- }
- return curr.value;
- }
- /**
- * Consume the "..." token which designates "spread" and "rest" operations if
- * it is present. If the operator is repeated, consume every repetition, and
- * issue a single error describing the syntax error.
- *
- * @param {string} operation - either "spread" or "rest"
- *
- * @returns {boolean} a value describing whether or not any tokens were
- * consumed in this way
- */
- function spreadrest(operation) {
- if (!checkPunctuator(state.tokens.next, "...")) {
- return false;
- }
- if (!state.inES6(true)) {
- warning("W119", state.tokens.next, operation + " operator", "6");
- }
- advance();
- if (checkPunctuator(state.tokens.next, "...")) {
- warning("E024", state.tokens.next, "...");
- while (checkPunctuator(state.tokens.next, "...")) {
- advance();
- }
- }
- return true;
- }
- /**
- * Ensure that the current token is an identifier and retrieve its value.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- * @param {boolean} [isName] - `true` if an IdentifierName should be consumed
- * (e.g. object properties)
- *
- * @returns {string|undefined} - the value of the identifier, if present
- */
- function identifier(context, isName) {
- var i = optionalidentifier(context, isName, false);
- if (i) {
- return i;
- }
- error("E030", state.tokens.next, state.tokens.next.value);
- // The token should be consumed after a warning is issued so the parser
- // can continue as though an identifier were found. The semicolon token
- // should not be consumed in this way so that the parser interprets it as
- // a statement delimiter;
- if (state.tokens.next.id !== ";") {
- advance();
- }
- }
- /**
- * Determine if the provided token may be evaluated and emit a linting
- * warning if this is note the case.
- *
- * @param {token} controlToken
- */
- function reachable(controlToken) {
- var i = 0, t;
- if (state.tokens.next.id !== ";" || controlToken.inBracelessBlock) {
- return;
- }
- for (;;) {
- do {
- t = peek(i);
- i += 1;
- } while (t.id !== "(end)" && t.id === "(comment)");
- if (t.reach) {
- return;
- }
- if (t.id !== "(endline)") {
- if (t.id === "function") {
- if (state.option.latedef === true) {
- warning("W026", t);
- }
- break;
- }
- warning("W027", t, t.value, controlToken.value);
- break;
- }
- }
- }
- /**
- * Consume the semicolon that delimits the statement currently being parsed,
- * emitting relevant warnings/errors as appropriate.
- *
- * @param {token} stmt - token describing the statement under consideration
- */
- function parseFinalSemicolon(stmt) {
- if (state.tokens.next.id !== ";") {
- // don't complain about unclosed templates / strings
- if (state.tokens.next.isUnclosed) return advance();
- var isSameLine = sameLine(state.tokens.curr, state.tokens.next) &&
- state.tokens.next.id !== "(end)";
- var blockEnd = checkPunctuator(state.tokens.next, "}");
- if (isSameLine && !blockEnd && !(stmt.id === "do" && state.inES6(true))) {
- errorAt("E058", state.tokens.curr.line, state.tokens.curr.character);
- } else if (!state.option.asi) {
- // If this is the last statement in a block that ends on the same line
- // *and* option lastsemic is on, ignore the warning. Otherwise, issue
- // a warning about missing semicolon.
- if (!(blockEnd && isSameLine && state.option.lastsemic)) {
- warningAt("W033", state.tokens.curr.line, state.tokens.curr.character);
- }
- }
- } else {
- advance(";");
- }
- }
- /**
- * Consume a statement.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- *
- * @returns {token} - the token describing the statement
- */
- function statement(context) {
- var i = indent, r, t = state.tokens.next, hasOwnScope = false;
- context |= prodParams.initial;
- if (t.id === ";") {
- advance(";");
- return;
- }
- // Is this a labelled statement?
- var res = isReserved(context, t);
- // We're being more tolerant here: if someone uses
- // a FutureReservedWord (that is not meant to start a statement)
- // as a label, we warn but proceed anyway.
- if (res && t.meta && t.meta.isFutureReservedWord && !t.fud) {
- warning("W024", t, t.id);
- res = false;
- }
- if (t.identifier && !res && peek().id === ":") {
- advance();
- advance(":");
- hasOwnScope = true;
- state.funct["(scope)"].stack();
- state.funct["(scope)"].block.addLabel(t.value, { token: state.tokens.curr });
- if (!state.tokens.next.labelled && state.tokens.next.value !== "{") {
- warning("W028", state.tokens.next, t.value, state.tokens.next.value);
- }
- t = state.tokens.next;
- }
- // Is it a lonely block?
- if (t.id === "{") {
- // Is it a switch case block?
- //
- // switch (foo) {
- // case bar: { <= here.
- // ...
- // }
- // }
- var iscase = (state.funct["(verb)"] === "case" && state.tokens.curr.value === ":");
- block(context, true, true, false, false, iscase);
- if (hasOwnScope) {
- state.funct["(scope)"].unstack();
- }
- return;
- }
- // Parse the statement.
- r = expression(context, 0);
- if (r && !(r.identifier && r.value === "function") &&
- !(r.type === "(punctuator)" && r.left &&
- r.left.identifier && r.left.value === "function")) {
- if (!state.isStrict() && state.stmtMissingStrict()) {
- warning("E007");
- }
- }
- // Look for the final semicolon.
- if (!t.block) {
- if (!state.option.expr && (!r || !r.exps)) {
- warning("W030", state.tokens.curr);
- } else if (state.option.nonew && r && r.left && r.id === "(" && r.left.id === "new") {
- warning("W031", t);
- }
- parseFinalSemicolon(t);
- }
- // Restore the indentation.
- indent = i;
- if (hasOwnScope) {
- state.funct["(scope)"].unstack();
- }
- return r;
- }
- /**
- * Consume a series of statements until encountering either the end of the
- * program or a token that interrupts control flow.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- *
- * @returns {Array<token>} - the tokens consumed
- */
- function statements(context) {
- var a = [], p;
- while (!state.tokens.next.reach && state.tokens.next.id !== "(end)") {
- if (state.tokens.next.id === ";") {
- p = peek();
- if (!p || (p.id !== "(" && p.id !== "[")) {
- warning("W032");
- }
- advance(";");
- } else {
- a.push(statement(context));
- }
- }
- return a;
- }
- /**
- * Parse any directives in a directive prologue.
- */
- function directives() {
- var current = state.tokens.next;
- while (state.tokens.next.id === "(string)") {
- var next = peekIgnoreEOL();
- if (!isEndOfExpr(0, current, next)) {
- break;
- }
- current = next;
- advance();
- var directive = state.tokens.curr.value;
- if (state.directive[directive] ||
- (directive === "use strict" && state.option.strict === "implied")) {
- warning("W034", state.tokens.curr, directive);
- }
- // From ECMAScript 2016:
- //
- // > 14.1.2 Static Semantics: Early Errors
- // >
- // > [...]
- // > - It is a Syntax Error if ContainsUseStrict of FunctionBody is true
- // > and IsSimpleParameterList of FormalParameters is false.
- if (directive === "use strict" && state.inES7() &&
- !state.funct["(global)"] && state.funct["(hasSimpleParams)"] === false) {
- error("E065", state.tokens.curr);
- }
- state.directive[directive] = state.tokens.curr;
- parseFinalSemicolon(current);
- }
- if (state.isStrict()) {
- state.option.undef = true;
- }
- }
- /**
- * Parses a single block. A block is a sequence of statements wrapped in
- * braces.
- *
- * @param {number} context - parsing context
- * @param {boolean} ordinary - `true` for everything but function bodies and
- * try blocks
- * @param {boolean} [stmt] - `true` if block can be a single statement (e.g.
- * in if/for/while)
- * @param {boolean} [isfunc] - `true` if block is a function body
- * @param {boolean} [isfatarrow] - `true` if its a body of a fat arrow
- * function
- * @param {boolean} [iscase] - `true` if block is a switch case block
- *
- * @returns {token} - the token describing the block
- */
- function block(context, ordinary, stmt, isfunc, isfatarrow, iscase) {
- var a,
- b = inblock,
- old_indent = indent,
- m,
- t,
- d;
- inblock = ordinary;
- t = state.tokens.next;
- var metrics = state.funct["(metrics)"];
- metrics.nestedBlockDepth += 1;
- metrics.verifyMaxNestedBlockDepthPerFunction();
- if (state.tokens.next.id === "{") {
- advance("{");
- // create a new block scope
- state.funct["(scope)"].stack();
- if (state.tokens.next.id !== "}") {
- indent += state.option.indent;
- while (!ordinary && state.tokens.next.from > indent) {
- indent += state.option.indent;
- }
- if (isfunc) {
- m = {};
- for (d in state.directive) {
- m[d] = state.directive[d];
- }
- directives();
- state.funct["(isStrict)"] = state.isStrict();
- if (state.option.strict && state.funct["(context)"]["(global)"]) {
- if (!m["use strict"] && !state.isStrict()) {
- warning("E007");
- }
- }
- }
- a = statements(context);
- metrics.statementCount += a.length;
- indent -= state.option.indent;
- } else if (isfunc) {
- // Ensure property is set for functions with empty bodies.
- state.funct["(isStrict)"] = state.isStrict();
- }
- advance("}", t);
- if (isfunc) {
- state.funct["(scope)"].validateParams(isfatarrow);
- if (m) {
- state.directive = m;
- }
- }
- state.funct["(scope)"].unstack();
- indent = old_indent;
- } else if (!ordinary) {
- if (isfunc) {
- state.funct["(scope)"].stack();
- if (stmt && !isfatarrow && !state.inMoz()) {
- error("W118", state.tokens.curr, "function closure expressions");
- }
- if (isfatarrow) {
- state.funct["(scope)"].validateParams(true);
- }
- var expr = expression(context, 10);
- if (state.option.noreturnawait && context & prodParams.async &&
- expr.identifier && expr.value === "await") {
- warning("W146", expr);
- }
- if (state.option.strict && state.funct["(context)"]["(global)"]) {
- if (!state.isStrict()) {
- warning("E007");
- }
- }
- state.funct["(scope)"].unstack();
- } else {
- error("E021", state.tokens.next, "{", state.tokens.next.value);
- }
- } else {
- state.funct["(scope)"].stack();
- if (!stmt || state.option.curly) {
- warning("W116", state.tokens.next, "{", state.tokens.next.value);
- }
- // JSHint observes Annex B of the ECMAScript specification by default,
- // where function declarations are permitted in the statement positions
- // of IfStatements.
- var supportsFnDecl = state.funct["(verb)"] === "if" ||
- state.tokens.curr.id === "else";
- state.tokens.next.inBracelessBlock = true;
- indent += state.option.indent;
- // test indentation only if statement is in new line
- a = [statement(context)];
- indent -= state.option.indent;
- if (a[0] && a[0].declaration &&
- !(supportsFnDecl && a[0].id === "function")) {
- error("E048", a[0], a[0].id[0].toUpperCase() + a[0].id.slice(1));
- }
- state.funct["(scope)"].unstack();
- }
- // Don't clear and let it propagate out if it is "break", "return" or
- // similar in switch case
- switch (state.funct["(verb)"]) {
- case "break":
- case "continue":
- case "return":
- case "throw":
- if (iscase) {
- break;
- }
- /* falls through */
- default:
- state.funct["(verb)"] = null;
- }
- inblock = b;
- if (ordinary && state.option.noempty && (!a || a.length === 0)) {
- warning("W035", state.tokens.prev);
- }
- metrics.nestedBlockDepth -= 1;
- return a;
- }
- /**
- * Update the global state which tracks all statically-identifiable property
- * names, and emit a warning if the `members` linting directive is in use and
- * does not include the given name.
- *
- * @param {string} m - the property name
- */
- function countMember(m) {
- if (membersOnly && typeof membersOnly[m] !== "boolean") {
- warning("W036", state.tokens.curr, m);
- }
- if (typeof member[m] === "number") {
- member[m] += 1;
- } else {
- member[m] = 1;
- }
- }
- // Build the syntax table by declaring the syntactic elements of the language.
- type("(number)", function() {
- if (state.tokens.next.id === ".") {
- warning("W005", this);
- }
- return this;
- });
- type("(string)", function() {
- return this;
- });
- state.syntax["(identifier)"] = {
- type: "(identifier)",
- lbp: 0,
- identifier: true,
- nud: function(context) {
- var v = this.value;
- // If this identifier is the lone parameter to a shorthand "fat arrow"
- // function definition, i.e.
- //
- // x => x;
- //
- // ...it should not be considered as a variable in the current scope. It
- // will be added to the scope of the new function when the next token is
- // parsed, so it can be safely ignored for now.
- var isLoneArrowParam = state.tokens.next.id === "=>";
- if (isReserved(context, this)) {
- warning("W024", this, v);
- } else if (!isLoneArrowParam && !state.funct["(comparray)"].check(v)) {
- state.funct["(scope)"].block.use(v, state.tokens.curr);
- }
- return this;
- },
- led: function() {
- /* istanbul ignore next */
- error("E033", state.tokens.next, state.tokens.next.value);
- }
- };
- var baseTemplateSyntax = {
- identifier: false,
- template: true,
- };
- state.syntax["(template)"] = _.extend({
- lbp: 155,
- type: "(template)",
- nud: doTemplateLiteral,
- led: doTemplateLiteral,
- noSubst: false
- }, baseTemplateSyntax);
- state.syntax["(template middle)"] = _.extend({
- lbp: 0,
- type: "(template middle)",
- noSubst: false
- }, baseTemplateSyntax);
- state.syntax["(template tail)"] = _.extend({
- lbp: 0,
- type: "(template tail)",
- tail: true,
- noSubst: false
- }, baseTemplateSyntax);
- state.syntax["(no subst template)"] = _.extend({
- lbp: 155,
- type: "(template)",
- nud: doTemplateLiteral,
- led: doTemplateLiteral,
- noSubst: true,
- tail: true // mark as tail, since it's always the last component
- }, baseTemplateSyntax);
- type("(regexp)", function() {
- return this;
- });
- // ECMAScript parser
- delim("(endline)");
- (function(x) {
- x.line = x.from = 0;
- })(delim("(begin)"));
- delim("(end)").reach = true;
- delim("(error)").reach = true;
- delim("}").reach = true;
- delim(")");
- delim("]");
- delim("\"").reach = true;
- delim("'").reach = true;
- delim(";");
- delim(":").reach = true;
- delim("#");
- reserve("else");
- reserve("case").reach = true;
- reserve("catch");
- reserve("default").reach = true;
- reserve("finally");
- reserve("true", function() { return this; });
- reserve("false", function() { return this; });
- reserve("null", function() { return this; });
- reserve("this", function() {
- if (state.isStrict() && !isMethod() &&
- !state.option.validthis && ((state.funct["(statement)"] &&
- state.funct["(name)"].charAt(0) > "Z") || state.funct["(global)"])) {
- warning("W040", this);
- }
- return this;
- });
- (function(superSymbol) {
- superSymbol.rbp = 161;
- })(reserve("super", function() {
- superNud.call(state.tokens.curr, this);
- return this;
- }));
- assignop("=", "assign");
- assignop("+=", "assignadd");
- assignop("-=", "assignsub");
- assignop("*=", "assignmult");
- assignop("/=", "assigndiv").nud = function() {
- /* istanbul ignore next */
- error("E014");
- };
- assignop("%=", "assignmod");
- assignop("**=", function(context, left, that) {
- if (!state.inES7()) {
- warning("W119", that, "Exponentiation operator", "7");
- }
- that.left = left;
- checkLeftSideAssign(context, left, that);
- that.right = expression(context, 10);
- return that;
- });
- bitwiseassignop("&=");
- bitwiseassignop("|=");
- bitwiseassignop("^=");
- bitwiseassignop("<<=");
- bitwiseassignop(">>=");
- bitwiseassignop(">>>=");
- infix(",", function(context, left, that) {
- if (state.option.nocomma) {
- warning("W127", that);
- }
- that.left = left;
- if (checkComma()) {
- that.right = expression(context, 10);
- } else {
- that.right = null;
- }
- return that;
- }, 10, true);
- infix("?", function(context, left, that) {
- increaseComplexityCount();
- that.left = left;
- that.right = expression(context & ~prodParams.noin, 10);
- advance(":");
- expression(context, 10);
- return that;
- }, 30);
- infix("||", function(context, left, that) {
- increaseComplexityCount();
- that.left = left;
- that.right = expression(context, 40);
- return that;
- }, 40);
- var andPrecedence = 50;
- infix("&&", function(context, left, that) {
- increaseComplexityCount();
- that.left = left;
- that.right = expression(context, andPrecedence);
- return that;
- }, andPrecedence);
- infix("??", function(context, left, that) {
- if (!left.paren && (left.id === "||" || left.id === "&&")) {
- error("E024", that, "??");
- }
- if (!state.inES11()) {
- warning("W119", that, "nullish coalescing", "11");
- }
- increaseComplexityCount();
- that.left = left;
- var right = that.right = expression(context, 39);
- if (!right) {
- error("E024", state.tokens.next, state.tokens.next.id);
- } else if (!right.paren && (right.id === "||" || right.id === "&&")) {
- error("E024", that.right, that.right.id);
- }
- return that;
- }, 39);
- // The Exponentiation operator, introduced in ECMAScript 2016
- //
- // ExponentiationExpression[Yield] :
- // UnaryExpression[?Yield]
- // UpdateExpression[?Yield] ** ExponentiationExpression[?Yield]
- infix("**", function(context, left, that) {
- if (!state.inES7()) {
- warning("W119", that, "Exponentiation operator", "7");
- }
- // Disallow UnaryExpressions which are not wrapped in parenthesis
- if (!left.paren && beginsUnaryExpression(left)) {
- error("E024", that, "**");
- }
- that.left = left;
- that.right = expression(context, that.rbp);
- return that;
- }, 150);
- state.syntax["**"].rbp = 140;
- bitwise("|", "bitor", 70);
- bitwise("^", "bitxor", 80);
- bitwise("&", "bitand", 90);
- relation("==", function(context, left, right) {
- var eqnull = state.option.eqnull &&
- ((left && left.value) === "null" || (right && right.value) === "null");
- switch (true) {
- case !eqnull && state.option.eqeqeq:
- this.from = this.character;
- warning("W116", this, "===", "==");
- break;
- /* istanbul ignore next */
- case isTypoTypeof(right, left, state):
- warning("W122", this, right.value);
- break;
- case isTypoTypeof(left, right, state):
- warning("W122", this, left.value);
- break;
- }
- return this;
- });
- relation("===", function(context, left, right) {
- if (isTypoTypeof(right, left, state)) {
- warning("W122", this, right.value);
- } else if (isTypoTypeof(left, right, state)) {
- /* istanbul ignore next */
- warning("W122", this, left.value);
- }
- return this;
- });
- relation("!=", function(context, left, right) {
- var eqnull = state.option.eqnull &&
- ((left && left.value) === "null" || (right && right.value) === "null");
- if (!eqnull && state.option.eqeqeq) {
- this.from = this.character;
- warning("W116", this, "!==", "!=");
- } else if (isTypoTypeof(right, left, state)) {
- /* istanbul ignore next */
- warning("W122", this, right.value);
- } else if (isTypoTypeof(left, right, state)) {
- warning("W122", this, left.value);
- }
- return this;
- });
- relation("!==", function(context, left, right) {
- if (isTypoTypeof(right, left, state)) {
- warning("W122", this, right.value);
- } else if (isTypoTypeof(left, right, state)) {
- /* istanbul ignore next */
- warning("W122", this, left.value);
- }
- return this;
- });
- relation("<");
- relation(">");
- relation("<=");
- relation(">=");
- bitwise("<<", "shiftleft", 120);
- bitwise(">>", "shiftright", 120);
- bitwise(">>>", "shiftrightunsigned", 120);
- infix("in", "in", 120);
- infix("instanceof", function(context, left, token) {
- var right;
- var scope = state.funct["(scope)"];
- token.left = left;
- token.right = right = expression(context, 120);
- // This condition reflects a syntax error which will be reported by the
- // `expression` function.
- if (!right) {
- return token;
- }
- if (right.id === "(number)" ||
- right.id === "(string)" ||
- right.value === "null" ||
- (right.value === "undefined" && !scope.has("undefined")) ||
- right.arity === "unary" ||
- right.id === "{" ||
- (right.id === "[" && !right.right) ||
- right.id === "(regexp)" ||
- (right.id === "(template)" && !right.tag)) {
- error("E060");
- }
- if (right.id === "function") {
- warning("W139");
- }
- return token;
- }, 120);
- infix("+", function(context, left, that) {
- var next = state.tokens.next;
- var right;
- that.left = left;
- that.right = right = expression(context, 130);
- if (left && right && left.id === "(string)" && right.id === "(string)") {
- left.value += right.value;
- left.character = right.character;
- if (!state.option.scripturl && reg.javascriptURL.test(left.value)) {
- warning("W050", left);
- }
- return left;
- }
- if (next.id === "+" || next.id === "++") {
- warning("W007", that.right);
- }
- return that;
- }, 130);
- prefix("+", function(context) {
- var next = state.tokens.next;
- this.arity = "unary";
- this.right = expression(context, 150);
- if (next.id === "+" || next.id === "++") {
- warning("W007", this.right);
- }
- return this;
- });
- infix("-", function(context, left, that) {
- var next = state.tokens.next;
- that.left = left;
- that.right = expression(context, 130);
- if (next.id === "-" || next.id === "--") {
- warning("W006", that.right);
- }
- return that;
- }, 130);
- prefix("-", function(context) {
- var next = state.tokens.next;
- this.arity = "unary";
- this.right = expression(context, 150);
- if (next.id === "-" || next.id === "--") {
- warning("W006", this.right);
- }
- return this;
- });
- infix("*", "mult", 140);
- infix("/", "div", 140);
- infix("%", "mod", 140);
- suffix("++");
- prefix("++", "preinc");
- state.syntax["++"].exps = true;
- suffix("--");
- prefix("--", "predec");
- state.syntax["--"].exps = true;
- prefix("delete", function(context) {
- this.arity = "unary";
- var p = expression(context, 150);
- if (!p) {
- return this;
- }
- if (p.id !== "." && p.id !== "[") {
- warning("W051");
- }
- this.first = p;
- // The `delete` operator accepts unresolvable references when not in strict
- // mode, so the operand may be undefined.
- if (p.identifier && !state.isStrict()) {
- p.forgiveUndef = true;
- }
- return this;
- }).exps = true;
- prefix("~", function(context) {
- if (state.option.bitwise) {
- warning("W016", this, "~");
- }
- this.arity = "unary";
- this.right = expression(context, 150);
- return this;
- });
- infix("...");
- prefix("!", function(context) {
- this.arity = "unary";
- this.right = expression(context, 150);
- if (!this.right) { // '!' followed by nothing? Give up.
- quit("E041", this);
- }
- if (bang[this.right.id] === true) {
- warning("W018", this, "!");
- }
- return this;
- });
- prefix("typeof", function(context) {
- this.arity = "unary";
- var p = expression(context, 150);
- this.first = this.right = p;
- if (!p) { // 'typeof' followed by nothing? Give up.
- quit("E041", this);
- }
- // The `typeof` operator accepts unresolvable references, so the operand
- // may be undefined.
- if (p.identifier) {
- p.forgiveUndef = true;
- }
- return this;
- });
- prefix("new", function(context) {
- var mp = metaProperty(context, "target", function() {
- if (!state.inES6(true)) {
- warning("W119", state.tokens.prev, "new.target", "6");
- }
- var inFunction, c = state.funct;
- while (c) {
- inFunction = !c["(global)"];
- if (!c["(arrow)"]) { break; }
- c = c["(context)"];
- }
- if (!inFunction) {
- warning("W136", state.tokens.prev, "new.target");
- }
- });
- if (mp) { return mp; }
- var opening = state.tokens.next;
- var c = expression(context, 155), i;
- if (!c) {
- return this;
- }
- if (!c.paren && c.rbp > 160) {
- error("E024", opening, opening.value);
- }
- if (c.id !== "function") {
- if (c.identifier) {
- switch (c.value) {
- case "Number":
- case "String":
- case "Boolean":
- case "Math":
- case "JSON":
- warning("W053", state.tokens.prev, c.value);
- break;
- case "Symbol":
- if (state.inES6()) {
- warning("W053", state.tokens.prev, c.value);
- }
- break;
- case "Function":
- if (!state.option.evil) {
- warning("W054");
- }
- break;
- case "Date":
- case "RegExp":
- case "this":
- break;
- default:
- i = c.value.substr(0, 1);
- if (state.option.newcap && (i < "A" || i > "Z") &&
- !state.funct["(scope)"].isPredefined(c.value)) {
- warning("W055", state.tokens.curr);
- }
- }
- } else {
- if (c.id === "?." && !c.paren) {
- error("E024", c, "?.");
- } else if (c.id !== "." && c.id !== "[" && c.id !== "(") {
- /* istanbul ignore next */
- warning("W056", state.tokens.curr);
- }
- }
- } else {
- if (!state.option.supernew)
- warning("W057", this);
- }
- if (state.tokens.next.id !== "(" && !state.option.supernew) {
- warning("W058", state.tokens.curr, state.tokens.curr.value);
- }
- this.first = this.right = c;
- return this;
- });
- state.syntax["new"].exps = true;
- var classDeclaration = blockstmt("class", function(context) {
- var className, classNameToken;
- if (!state.inES6()) {
- warning("W104", state.tokens.curr, "class", "6");
- }
- state.inClassBody = true;
- // Class Declaration: 'class <Classname>'
- if (state.tokens.next.identifier && state.tokens.next.value !== "extends") {
- classNameToken = state.tokens.next;
- className = classNameToken.value;
- identifier(context);
- // unintialized, so that the 'extends' clause is parsed while the class is in TDZ
- state.funct["(scope)"].addbinding(className, {
- type: "class",
- initialized: false,
- token: classNameToken
- });
- }
- // Class Declaration: 'class <Classname> extends <Superclass>'
- if (state.tokens.next.value === "extends") {
- advance("extends");
- expression(context, 0);
- }
- if (classNameToken) {
- this.name = classNameToken;
- state.funct["(scope)"].initialize(className);
- } else {
- this.name = null;
- }
- state.funct["(scope)"].stack();
- classBody(this, context);
- return this;
- });
- classDeclaration.exps = true;
- classDeclaration.declaration = true;
- /*
- Class expression
- The Block- and Expression- handling for "class" are almost identical, except for the ordering of steps.
- In an expression:, the name should not be saved into the calling scope, but is still accessible inside the definition, so we open a new scope first, then save the name. We also mark it as used.
- */
- prefix("class", function(context) {
- var className, classNameToken;
- if (!state.inES6()) {
- warning("W104", state.tokens.curr, "class", "6");
- }
- state.inClassBody = true;
- // Class Declaration: 'class <Classname>'
- if (state.tokens.next.identifier && state.tokens.next.value !== "extends") {
- classNameToken = state.tokens.next;
- className = classNameToken.value;
- identifier(context);
- }
- // Class Declaration: 'class <Classname> extends <Superclass>'
- if (state.tokens.next.value === "extends") {
- advance("extends");
- expression(context, 0);
- }
- state.funct["(scope)"].stack();
- if (classNameToken) {
- this.name = classNameToken;
- state.funct["(scope)"].addbinding(className, {
- type: "class",
- initialized: true,
- token: classNameToken
- });
- state.funct["(scope)"].block.use(className, classNameToken);
- } else {
- this.name = null;
- }
- classBody(this, context);
- return this;
- });
- function classBody(classToken, context) {
- var props = Object.create(null);
- var name, accessorType, token, isStatic, inGenerator, hasConstructor;
- /* istanbul ignore else */
- if (state.tokens.next.value === "{") {
- advance("{");
- } else {
- warning("W116", state.tokens.curr, "identifier", state.tokens.next.type); //?
- advance();
- }
- while (state.tokens.next.value !== "}") {
- isStatic = false;
- inGenerator = false;
- context &= ~prodParams.preAsync;
- if (state.tokens.next.value === "static" &&
- !checkPunctuator(peek(), "(")) {
- isStatic = true;
- advance();
- }
- if (state.tokens.next.value === "async") {
- if (!checkPunctuator(peek(), "(")) {
- context |= prodParams.preAsync;
- advance();
- nolinebreak(state.tokens.curr);
- if (checkPunctuator(state.tokens.next, "*")) {
- inGenerator = true;
- advance("*");
- if (!state.inES9()) {
- warning("W119", state.tokens.next, "async generators", "9");
- }
- }
- if (!state.inES8()) {
- warning("W119", state.tokens.curr, "async functions", "8");
- }
- }
- }
- if (state.tokens.next.value === "*") {
- inGenerator = true;
- advance();
- }
- token = state.tokens.next;
- if ((token.value === "set" || token.value === "get") && !checkPunctuator(peek(), "(")) {
- if (inGenerator) {
- /* istanbul ignore next */
- error("E024", token, token.value);
- }
- accessorType = token.value;
- advance();
- token = state.tokens.next;
- if (!isStatic && token.value === "constructor") {
- error("E049", token, "class " + accessorType + "ter method", token.value);
- } else if (isStatic && token.value === "prototype") {
- error("E049", token, "static class " + accessorType + "ter method", token.value);
- }
- } else {
- accessorType = null;
- }
- switch (token.value) {
- case ";":
- warning("W032", token);
- advance();
- break;
- case "constructor":
- if (isStatic) {
- // treat like a regular method -- static methods can be called 'constructor'
- name = propertyName(context);
- saveProperty(props, name, token, true, isStatic);
- doMethod(classToken, context, name, inGenerator);
- } else {
- if (inGenerator || context & prodParams.preAsync) {
- error("E024", token, token.value);
- } else if (hasConstructor) {
- /* istanbul ignore next */
- error("E024", token, token.value);
- } else {
- hasConstructor = !accessorType && !isStatic;
- }
- advance();
- doMethod(classToken, context, state.nameStack.infer());
- }
- break;
- case "[":
- name = computedPropertyName(context);
- doMethod(classToken, context, name, inGenerator);
- // We don't check names (via calling saveProperty()) of computed expressions like ["Symbol.iterator"]()
- break;
- default:
- name = propertyName(context);
- if (name === undefined) {
- error("E024", token, token.value);
- advance();
- break;
- }
- if (accessorType) {
- saveAccessor(accessorType, props, name, token, true, isStatic);
- name = state.nameStack.infer();
- } else {
- if (isStatic && name === "prototype") {
- error("E049", token, "static class method", name);
- }
- saveProperty(props, name, token, true, isStatic);
- }
- doMethod(classToken, context, name, inGenerator);
- break;
- }
- }
- advance("}");
- checkProperties(props);
- state.inClassBody = false;
- state.funct["(scope)"].unstack();
- }
- function doMethod(classToken, context, name, generator) {
- if (generator) {
- if (!state.inES6()) {
- warning("W119", state.tokens.curr, "function*", "6");
- }
- }
- if (state.tokens.next.value !== "(") {
- error("E054", state.tokens.next, state.tokens.next.value);
- advance();
- if (state.tokens.next.value === "{") {
- // manually cheating the test "invalidClasses", which asserts this particular behavior when a class is misdefined.
- advance();
- if (state.tokens.next.value === "}") {
- warning("W116", state.tokens.next, "(", state.tokens.next.value);
- advance();
- identifier(context);
- advance();
- }
- /* istanbul ignore next */
- return;
- } else {
- while (state.tokens.next.value !== "(") {
- advance();
- }
- }
- }
- doFunction(context, { name: name,
- type: generator ? "generator" : null,
- isMethod: true,
- statement: classToken });
- }
- prefix("void").exps = true;
- infix(".", function(context, left, that) {
- var m = identifier(context, true);
- if (typeof m === "string") {
- countMember(m);
- }
- that.left = left;
- that.right = m;
- if (m && m === "hasOwnProperty" && state.tokens.next.value === "=") {
- warning("W001");
- }
- if (left && left.value === "arguments" && (m === "callee" || m === "caller")) {
- if (state.option.noarg)
- warning("W059", left, m);
- else if (state.isStrict())
- error("E008");
- } else if (!state.option.evil && left && left.value === "document" &&
- (m === "write" || m === "writeln")) {
- warning("W060", left);
- }
- if (!state.option.evil && (m === "eval" || m === "execScript")) {
- if (isGlobalEval(left, state)) {
- warning("W061");
- }
- }
- return that;
- }, 160, true);
- infix("?.", function(context, left, that) {
- if (!state.inES11()) {
- warning("W119", state.tokens.curr, "Optional chaining", "11");
- }
- if (checkPunctuator(state.tokens.next, "[")) {
- that.left = left;
- advance();
- that.right = state.tokens.curr.led(context, left);
- } else if (checkPunctuator(state.tokens.next, "(")) {
- that.left = left;
- advance();
- that.right = state.tokens.curr.led(context, left);
- that.exps = true;
- } else {
- state.syntax["."].led.call(that, context, left);
- }
- if (state.tokens.next.type === "(template)") {
- error("E024", state.tokens.next, "`");
- }
- return that;
- }, 160, true);
- /**
- * Determine if a CallExpression's "base" is a type of expression commonly
- * used in this position.
- *
- * @param {token} token - token describing the "base" of the CallExpression
- * @returns {boolean}
- */
- function isTypicalCallExpression(token) {
- return token.identifier || token.id === "." || token.id === "[" ||
- token.id === "=>" || token.id === "(" || token.id === "&&" ||
- token.id === "||" || token.id === "?" || token.id === "async" ||
- token.id === "?." || (state.inES6() && token["(name)"]);
- }
- infix("(", function(context, left, that) {
- if (state.option.immed && left && !left.immed && left.id === "function") {
- warning("W062");
- }
- if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
- !sameLine(state.tokens.prev, state.tokens.curr)) {
- warning("W014", state.tokens.curr, state.tokens.curr.id);
- }
- var n = 0;
- var p = [];
- if (left) {
- if (left.type === "(identifier)") {
- var newcapRe = /^[A-Z]([A-Z0-9_$]*[a-z][A-Za-z0-9_$]*)?$/;
- var newcapIgnore = [
- "Array", "Boolean", "Date", "Error", "Function", "Number",
- "Object", "RegExp", "String", "Symbol"
- ];
- if (newcapRe.test(left.value) && newcapIgnore.indexOf(left.value) === -1) {
- if (left.value === "Math") {
- /* istanbul ignore next */
- warning("W063", left);
- } else if (state.option.newcap) {
- warning("W064", left);
- }
- }
- }
- }
- if (state.tokens.next.id !== ")") {
- for (;;) {
- spreadrest("spread");
- p[p.length] = expression(context, 10);
- n += 1;
- if (state.tokens.next.id !== ",") {
- break;
- }
- advance(",");
- checkComma({ allowTrailing: true });
- if (state.tokens.next.id === ")") {
- if (!state.inES8()) {
- warning("W119", state.tokens.curr, "Trailing comma in arguments lists", "8");
- }
- break;
- }
- }
- }
- advance(")");
- if (typeof left === "object") {
- if (!state.inES5() && left.value === "parseInt" && n === 1) {
- warning("W065", state.tokens.curr);
- }
- if (!state.option.evil) {
- if (left.value === "eval" || left.value === "Function" ||
- left.value === "execScript") {
- warning("W061", left);
- // This conditional expression was initially implemented with a typo
- // which prevented the branch's execution in all cases. While
- // enabling the code will produce behavior that is consistent with
- // the other forms of code evaluation that follow, such a change is
- // also technically incompatable with prior versions of JSHint (due
- // to the fact that the behavior was never formally documented). This
- // branch should be enabled as part of a major release.
- //if (p[0] && p[0].id === "(string)") {
- // addEvalCode(left, p[0]);
- //}
- } else if (p[0] && p[0].id === "(string)" &&
- (left.value === "setTimeout" ||
- left.value === "setInterval")) {
- warning("W066", left);
- addEvalCode(left, p[0]);
- // window.setTimeout/setInterval
- } else if (p[0] && p[0].id === "(string)" &&
- left.value === "." &&
- left.left.value === "window" &&
- (left.right === "setTimeout" ||
- left.right === "setInterval")) {
- warning("W066", left);
- addEvalCode(left, p[0]);
- }
- }
- if (!isTypicalCallExpression(left)) {
- warning("W067", that);
- }
- }
- that.left = left;
- return that;
- }, 155, true).exps = true;
- function peekThroughParens(parens) {
- var pn = state.tokens.next;
- var i = -1;
- var pn1;
- do {
- if (pn.value === "(") {
- parens += 1;
- } else if (pn.value === ")") {
- parens -= 1;
- }
- i += 1;
- pn1 = pn;
- pn = peek(i);
- } while (!(parens === 0 && pn1.value === ")") && pn.type !== "(end)");
- return pn;
- }
- prefix("(", function(context, rbp) {
- var ret, triggerFnExpr, first, last;
- var opening = state.tokens.curr;
- var preceeding = state.tokens.prev;
- var isNecessary = !state.option.singleGroups;
- var pn = peekThroughParens(1);
- if (state.tokens.next.id === "function") {
- triggerFnExpr = state.tokens.next.immed = true;
- }
- // If the balanced grouping operator is followed by a "fat arrow", the
- // current token marks the beginning of a "fat arrow" function and parsing
- // should proceed accordingly.
- if (pn.value === "=>") {
- pn.funct = doFunction(context, { type: "arrow", parsedOpening: true });
- return pn;
- }
- // The ECMA262 grammar requires an expression between the "opening
- // parenthesis" and "close parenthesis" tokens of the grouping operator.
- // However, the "ignore" directive is commonly used to inject values that
- // are not included in the token stream. For example:
- //
- // return (
- // /*jshint ignore:start */
- // <div></div>
- // /*jshint ignore:end */
- // );
- //
- // The "empty" grouping operator is permitted in order to tolerate this
- // pattern.
- if (state.tokens.next.id === ")") {
- advance(")");
- return;
- }
- ret = expression(context, 0);
- advance(")", this);
- if (!ret) {
- return;
- }
- ret.paren = true;
- if (state.option.immed && ret && ret.id === "function") {
- if (state.tokens.next.id !== "(" &&
- state.tokens.next.id !== "." && state.tokens.next.id !== "[") {
- warning("W068", this);
- }
- }
- if (ret.id === ",") {
- first = ret.left;
- while (first.id === ",") {
- first = first.left;
- }
- last = ret.right;
- } else {
- first = last = ret;
- if (!isNecessary) {
- // async functions are identified after parsing due to the complexity
- // of disambiguating the `async` keyword.
- if (!triggerFnExpr) {
- triggerFnExpr = ret.id === "async";
- }
- isNecessary =
- // Used to distinguish from an ExpressionStatement which may not
- // begin with the `{` and `function` tokens
- (opening.beginsStmt && (ret.id === "{" || triggerFnExpr)) ||
- // Used to signal that a function expression is being supplied to
- // some other operator.
- (triggerFnExpr &&
- // For parenthesis wrapping a function expression to be considered
- // necessary, the grouping operator should be the left-hand-side of
- // some other operator--either within the parenthesis or directly
- // following them.
- (!isEndOfExpr() || state.tokens.prev.id !== "}")) ||
- // Used to demarcate an arrow function as the left-hand side of some
- // operator.
- (ret.id === "=>" && !isEndOfExpr()) ||
- // Used as the return value of a single-statement arrow function
- (ret.id === "{" && preceeding.id === "=>") ||
- // Used to cover a unary expression as the left-hand side of the
- // exponentiation operator
- (beginsUnaryExpression(ret) && state.tokens.next.id === "**") ||
- // Used to cover a logical operator as the right-hand side of the
- // nullish coalescing operator
- (preceeding.id === "??" && (ret.id === "&&" || ret.id === "||")) ||
- // Used to delineate an integer number literal from a dereferencing
- // punctuator (otherwise interpreted as a decimal point)
- (ret.type === "(number)" &&
- checkPunctuator(pn, ".") && /^\d+$/.test(ret.value)) ||
- // Used to wrap object destructuring assignment
- (opening.beginsStmt && ret.id === "=" && ret.left.id === "{") ||
- // Used to allow optional chaining with other language features which
- // are otherwise restricted.
- (ret.id === "?." &&
- (preceeding.id === "new" || state.tokens.next.type === "(template)"));
- }
- }
- // The operator may be necessary to override the default binding power of
- // neighboring operators (whenever there is an operator in use within the
- // first expression *or* the current group contains multiple expressions)
- if (!isNecessary && (isOperator(first) || first !== last)) {
- isNecessary =
- (rbp > first.lbp) ||
- (rbp > 0 && rbp === first.lbp) ||
- (!isEndOfExpr() && last.rbp < state.tokens.next.lbp);
- }
- if (!isNecessary) {
- warning("W126", opening);
- }
- return ret;
- });
- application("=>").rbp = 161;
- infix("[", function(context, left, that) {
- var e, s, canUseDot;
- if (state.option.asi && checkPunctuators(state.tokens.prev, [")", "]"]) &&
- !sameLine(state.tokens.prev, state.tokens.curr)) {
- warning("W014", state.tokens.curr, state.tokens.curr.id);
- }
- e = expression(context & ~prodParams.noin, 0);
- if (e && e.type === "(string)") {
- if (!state.option.evil && (e.value === "eval" || e.value === "execScript")) {
- if (isGlobalEval(left, state)) {
- warning("W061");
- }
- }
- countMember(e.value);
- if (!state.option.sub && reg.identifier.test(e.value)) {
- s = state.syntax[e.value];
- if (s) {
- canUseDot = !isReserved(context, s);
- } else {
- // This branch exists to preserve legacy behavior with version 2.9.5
- // and earlier. In those releases, `eval` and `arguments` were
- // incorrectly interpreted as reserved keywords, so Member
- // Expressions such as `object["eval"]` did not trigger warning W069.
- //
- // TODO: Remove in JSHint 3
- canUseDot = e.value !== "eval" && e.value !== "arguments";
- }
- if (canUseDot) {
- warning("W069", state.tokens.prev, e.value);
- }
- }
- }
- advance("]", that);
- if (e && e.value === "hasOwnProperty" && state.tokens.next.value === "=") {
- warning("W001");
- }
- that.left = left;
- that.right = e;
- return that;
- }, 160, true);
- function comprehensiveArrayExpression(context) {
- var res = {};
- res.exps = true;
- state.funct["(comparray)"].stack();
- // Handle reversed for expressions, used in spidermonkey
- var reversed = false;
- if (state.tokens.next.value !== "for") {
- reversed = true;
- if (!state.inMoz()) {
- warning("W116", state.tokens.next, "for", state.tokens.next.value);
- }
- state.funct["(comparray)"].setState("use");
- res.right = expression(context, 10);
- }
- advance("for");
- if (state.tokens.next.value === "each") {
- advance("each");
- if (!state.inMoz()) {
- warning("W118", state.tokens.curr, "for each");
- }
- }
- advance("(");
- state.funct["(comparray)"].setState("define");
- res.left = expression(context, 130);
- if (_.includes(["in", "of"], state.tokens.next.value)) {
- advance();
- } else {
- /* istanbul ignore next */
- error("E045", state.tokens.curr);
- }
- state.funct["(comparray)"].setState("generate");
- expression(context, 10);
- advance(")");
- if (state.tokens.next.value === "if") {
- advance("if");
- advance("(");
- state.funct["(comparray)"].setState("filter");
- expression(context, 10);
- advance(")");
- }
- if (!reversed) {
- state.funct["(comparray)"].setState("use");
- res.right = expression(context, 10);
- }
- advance("]");
- state.funct["(comparray)"].unstack();
- return res;
- }
- prefix("[", function(context) {
- var blocktype = lookupBlockType();
- if (blocktype.isCompArray) {
- if (!state.option.esnext && !state.inMoz()) {
- warning("W118", state.tokens.curr, "array comprehension");
- }
- return comprehensiveArrayExpression(context);
- } else if (blocktype.isDestAssign) {
- this.destructAssign = destructuringPattern(context, {
- openingParsed: true,
- assignment: true
- });
- return this;
- }
- var b = !sameLine(state.tokens.curr, state.tokens.next);
- this.first = [];
- if (b) {
- indent += state.option.indent;
- if (state.tokens.next.from === indent + state.option.indent) {
- /* istanbul ignore next */
- indent += state.option.indent;
- }
- }
- while (state.tokens.next.id !== "(end)") {
- while (state.tokens.next.id === ",") {
- if (!state.option.elision) {
- if (!state.inES5()) {
- // Maintain compat with old options --- ES5 mode without
- // elision=true will warn once per comma
- warning("W070");
- } else {
- warning("W128");
- do {
- advance(",");
- } while (state.tokens.next.id === ",");
- continue;
- }
- }
- advance(",");
- }
- if (state.tokens.next.id === "]") {
- break;
- }
- spreadrest("spread");
- this.first.push(expression(context, 10));
- if (state.tokens.next.id === ",") {
- advance(",");
- checkComma({ allowTrailing: true });
- if (state.tokens.next.id === "]" && !state.inES5()) {
- warning("W070", state.tokens.curr);
- break;
- }
- } else {
- if (state.option.trailingcomma && state.inES5()) {
- warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
- }
- break;
- }
- }
- if (b) {
- indent -= state.option.indent;
- }
- advance("]", this);
- return this;
- });
- function isMethod() {
- return !!state.funct["(method)"];
- }
- /**
- * Retrieve the value of the next token if it is a valid LiteralPropertyName
- * and optionally advance the parser.
- *
- * @param {number} context - the parsing context; see `prod-params.js` for
- * more information
- *
- * @returns {string|undefined} - the value of the identifier, if present
- */
- function propertyName(context) {
- var id = optionalidentifier(context, true);
- if (!id) {
- if (state.tokens.next.id === "(string)") {
- id = state.tokens.next.value;
- advance();
- } else if (state.tokens.next.id === "(number)") {
- id = state.tokens.next.value.toString();
- advance();
- }
- }
- if (id === "hasOwnProperty") {
- warning("W001");
- }
- return id;
- }
- /**
- * @param {Number} context The parsing context
- * @param {Object} [options]
- * @param {token} [options.loneArg] The argument to the function in cases
- * where it was defined using the
- * single-argument shorthand.
- * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
- * already been parsed.
- *
- * @returns {{ arity: number, params: Array.<string>, isSimple: boolean }}
- */
- function functionparams(context, options) {
- var next;
- var paramsIds = [];
- var ident;
- var tokens = [];
- var t;
- var pastDefault = false;
- var pastRest = false;
- var arity = 0;
- var loneArg = options && options.loneArg;
- var hasDestructuring = false;
- if (loneArg && loneArg.identifier === true) {
- state.funct["(scope)"].addParam(loneArg.value, loneArg);
- return { arity: 1, params: [ loneArg.value ], isSimple: true };
- }
- next = state.tokens.next;
- if (!options || !options.parsedOpening) {
- advance("(");
- }
- if (state.tokens.next.id === ")") {
- advance(")");
- return;
- }
- function addParam(addParamArgs) {
- state.funct["(scope)"].addParam.apply(state.funct["(scope)"], addParamArgs);
- }
- for (;;) {
- arity++;
- // are added to the param scope
- var currentParams = [];
- pastRest = spreadrest("rest");
- if (_.includes(["{", "["], state.tokens.next.id)) {
- hasDestructuring = true;
- tokens = destructuringPattern(context);
- for (t in tokens) {
- t = tokens[t];
- if (t.id) {
- paramsIds.push(t.id);
- currentParams.push([t.id, t.token]);
- }
- }
- } else {
- ident = identifier(context);
- if (ident) {
- paramsIds.push(ident);
- currentParams.push([ident, state.tokens.curr]);
- } else {
- // Skip invalid parameter.
- while (!checkPunctuators(state.tokens.next, [",", ")"])) advance();
- }
- }
- // It is valid to have a regular argument after a default argument
- // since undefined can be used for missing parameters. Still warn as it is
- // a possible code smell.
- if (pastDefault) {
- if (state.tokens.next.id !== "=") {
- error("W138", state.tokens.curr);
- }
- }
- if (state.tokens.next.id === "=") {
- if (!state.inES6()) {
- warning("W119", state.tokens.next, "default parameters", "6");
- }
- if (pastRest) {
- error("E062", state.tokens.next);
- }
- advance("=");
- pastDefault = true;
- expression(context, 10);
- }
- // now we have evaluated the default expression, add the variable to the param scope
- currentParams.forEach(addParam);
- if (state.tokens.next.id === ",") {
- if (pastRest) {
- warning("W131", state.tokens.next);
- }
- advance(",");
- checkComma({ allowTrailing: true });
- }
- if (state.tokens.next.id === ")") {
- if (state.tokens.curr.id === "," && !state.inES8()) {
- warning("W119", state.tokens.curr, "Trailing comma in function parameters", "8");
- }
- advance(")", next);
- return {
- arity: arity,
- params: paramsIds,
- isSimple: !hasDestructuring && !pastRest && !pastDefault
- };
- }
- }
- }
- /**
- * Factory function for creating objects used to track statistics of function
- * literals.
- *
- * @param {string} name - the identifier name to associate with the function
- * @param {object} [token] - token responsible for creating the function
- * object
- * @param {object} [overwrites] - a collection of properties that should
- * override the corresponding default value of
- * the new "functor" object
- */
- function functor(name, token, overwrites) {
- var funct = {
- "(name)" : name,
- "(breakage)" : 0,
- "(loopage)" : 0,
- // The strictness of the function body is tracked via a dedicated
- // property (as opposed to via the global `state` object) so that the
- // value can be referenced after the body has been fully parsed (i.e.
- // when validating the identifier used in function declarations and
- // function expressions).
- "(isStrict)" : "unknown",
- "(global)" : false,
- "(line)" : null,
- "(character)" : null,
- "(metrics)" : null,
- "(statement)" : null,
- "(context)" : null,
- "(scope)" : null,
- "(comparray)" : null,
- "(yielded)" : null,
- "(arrow)" : null,
- "(async)" : null,
- "(params)" : null
- };
- if (token) {
- _.extend(funct, {
- "(line)" : token.line,
- "(character)": token.character,
- "(metrics)" : createMetrics(token)
- });
- }
- _.extend(funct, overwrites);
- if (funct["(context)"]) {
- funct["(scope)"] = funct["(context)"]["(scope)"];
- funct["(comparray)"] = funct["(context)"]["(comparray)"];
- }
- return funct;
- }
- /**
- * Determine if the parser has begun parsing executable code.
- *
- * @param {Token} funct - The current "functor" token
- *
- * @returns {boolean}
- */
- function hasParsedCode(funct) {
- return funct["(global)"] && !funct["(verb)"];
- }
- /**
- * This function is used as both a null-denotation method *and* a
- * left-denotation method, meaning the first parameter is overloaded.
- */
- function doTemplateLiteral(context, leftOrRbp) {
- // ASSERT: this.type === "(template)"
- // jshint validthis: true
- var ctx = this.context;
- var noSubst = this.noSubst;
- var depth = this.depth;
- var left = typeof leftOrRbp === "number" ? null : leftOrRbp;
- if (!noSubst) {
- while (!end()) {
- if (!state.tokens.next.template || state.tokens.next.depth > depth) {
- expression(context, 0); // should probably have different rbp?
- } else {
- // skip template start / middle
- advance();
- }
- }
- }
- return {
- id: "(template)",
- type: "(template)",
- tag: left
- };
- function end() {
- if (state.tokens.curr.template && state.tokens.curr.tail &&
- state.tokens.curr.context === ctx) {
- /* istanbul ignore next */
- return true;
- }
- var complete = (state.tokens.next.template && state.tokens.next.tail &&
- state.tokens.next.context === ctx);
- if (complete) advance();
- return complete || state.tokens.next.isUnclosed;
- }
- }
- /**
- * Parse a function literal.
- *
- * @param {Number} context The parsing context
- * @param {Object} [options]
- * @param {string} [options.name] The identifier belonging to the function (if
- * any)
- * @param {token} [options.statement] The statement that triggered creation
- * of the current function.
- * @param {string} [options.type] If specified, either "generator" or "arrow"
- * @param {token} [options.loneArg] The argument to the function in cases
- * where it was defined using the
- * single-argument shorthand
- * @param {bool} [options.parsedOpening] Whether the opening parenthesis has
- * already been parsed
- * @param {string} [options.classExprBinding] Define a function with this
- * identifier in the new function's
- * scope, mimicking the bahavior of
- * class expression names within
- * the body of member functions.
- */
- function doFunction(context, options) {
- var f, token, name, statement, classExprBinding, isGenerator, isArrow,
- isMethod, ignoreLoopFunc;
- var oldOption = state.option;
- var oldIgnored = state.ignored;
- var isAsync = context & prodParams.preAsync;
- if (options) {
- name = options.name;
- statement = options.statement;
- classExprBinding = options.classExprBinding;
- isGenerator = options.type === "generator";
- isArrow = options.type === "arrow";
- isMethod = options.isMethod;
- ignoreLoopFunc = options.ignoreLoopFunc;
- }
- context &= ~prodParams.noin;
- context &= ~prodParams.tryClause;
- if (isAsync) {
- context |= prodParams.async;
- } else {
- context &= ~prodParams.async;
- }
- if (isGenerator) {
- context |= prodParams.yield;
- } else if (!isArrow) {
- context &= ~prodParams.yield;
- }
- context &= ~prodParams.preAsync;
- state.option = Object.create(state.option);
- state.ignored = Object.create(state.ignored);
- state.funct = functor(name || state.nameStack.infer(), state.tokens.next, {
- "(statement)": statement,
- "(context)": state.funct,
- "(arrow)": isArrow,
- "(method)": isMethod,
- "(async)": isAsync
- });
- f = state.funct;
- token = state.tokens.curr;
- functions.push(state.funct);
- // So that the function is available to itself and referencing itself is not
- // seen as a closure, add the function name to a new scope, but do not
- // test for unused (unused: false)
- // it is a new block scope so that params can override it, it can be block scoped
- // but declarations inside the function don't cause already declared error
- state.funct["(scope)"].stack("functionouter");
- var internallyAccessibleName = !isMethod && (name || classExprBinding);
- if (internallyAccessibleName) {
- state.funct["(scope)"].block.add(internallyAccessibleName,
- classExprBinding ? "class" : "function", state.tokens.curr, false);
- }
- if (!isArrow) {
- state.funct["(scope)"].funct.add("arguments", "var", token, false);
- }
- // create the param scope (params added in functionparams)
- state.funct["(scope)"].stack("functionparams");
- var paramsInfo = functionparams(context, options);
- if (paramsInfo) {
- state.funct["(params)"] = paramsInfo.params;
- state.funct["(hasSimpleParams)"] = paramsInfo.isSimple;
- state.funct["(metrics)"].arity = paramsInfo.arity;
- state.funct["(metrics)"].verifyMaxParametersPerFunction();
- } else {
- state.funct["(params)"] = [];
- state.funct["(metrics)"].arity = 0;
- state.funct["(hasSimpleParams)"] = true;
- }
- if (isArrow) {
- context &= ~prodParams.yield;
- if (!state.inES6(true)) {
- warning("W119", state.tokens.curr, "arrow function syntax (=>)", "6");
- }
- if (!options.loneArg) {
- advance("=>");
- }
- }
- block(context, false, true, true, isArrow);
- if (!state.option.noyield && isGenerator && !state.funct["(yielded)"]) {
- warning("W124", state.tokens.curr);
- }
- state.funct["(metrics)"].verifyMaxStatementsPerFunction();
- state.funct["(metrics)"].verifyMaxComplexityPerFunction();
- state.funct["(unusedOption)"] = state.option.unused;
- state.option = oldOption;
- state.ignored = oldIgnored;
- state.funct["(last)"] = state.tokens.curr.line;
- state.funct["(lastcharacter)"] = state.tokens.curr.character;
- // unstack the params scope
- state.funct["(scope)"].unstack(); // also does usage and label checks
- // unstack the function outer stack
- state.funct["(scope)"].unstack();
- state.funct = state.funct["(context)"];
- if (!ignoreLoopFunc && !state.option.loopfunc && state.funct["(loopage)"]) {
- // If the function we just parsed accesses any non-local variables
- // trigger a warning. Otherwise, the function is safe even within
- // a loop.
- if (f["(outerMutables)"]) {
- warning("W083", token, f["(outerMutables)"].join(", "));
- }
- }
- return f;
- }
- function createMetrics(functionStartToken) {
- return {
- statementCount: 0,
- nestedBlockDepth: -1,
- ComplexityCount: 1,
- arity: 0,
- verifyMaxStatementsPerFunction: function() {
- if (state.option.maxstatements &&
- this.statementCount > state.option.maxstatements) {
- warning("W071", functionStartToken, this.statementCount);
- }
- },
- verifyMaxParametersPerFunction: function() {
- if (_.isNumber(state.option.maxparams) &&
- this.arity > state.option.maxparams) {
- warning("W072", functionStartToken, this.arity);
- }
- },
- verifyMaxNestedBlockDepthPerFunction: function() {
- if (state.option.maxdepth &&
- this.nestedBlockDepth > 0 &&
- this.nestedBlockDepth === state.option.maxdepth + 1) {
- warning("W073", null, this.nestedBlockDepth);
- }
- },
- verifyMaxComplexityPerFunction: function() {
- var max = state.option.maxcomplexity;
- var cc = this.ComplexityCount;
- if (max && cc > max) {
- warning("W074", functionStartToken, cc);
- }
- }
- };
- }
- function increaseComplexityCount() {
- state.funct["(metrics)"].ComplexityCount += 1;
- }
- // Parse assignments that were found instead of conditionals.
- // For example: if (a = 1) { ... }
- function checkCondAssignment(token) {
- if (!token || token.paren) {
- return;
- }
- if (token.id === ",") {
- checkCondAssignment(token.right);
- return;
- }
- switch (token.id) {
- case "=":
- case "+=":
- case "-=":
- case "*=":
- case "%=":
- case "&=":
- case "|=":
- case "^=":
- case "/=":
- if (!state.option.boss) {
- warning("W084", token);
- }
- }
- }
- /**
- * Validate the properties defined within an object literal or class body.
- * See the `saveAccessor` and `saveProperty` functions for more detail.
- *
- * @param {object} props - Collection of objects describing the properties
- * encountered
- */
- function checkProperties(props) {
- // Check for lonely setters if in the ES5 mode.
- if (state.inES5()) {
- for (var name in props) {
- if (props[name] && props[name].setterToken && !props[name].getterToken &&
- !props[name].static) {
- warning("W078", props[name].setterToken);
- }
- }
- }
- }
- function metaProperty(context, name, c) {
- if (checkPunctuator(state.tokens.next, ".")) {
- var left = state.tokens.curr.id;
- advance(".");
- var id = identifier(context);
- state.tokens.curr.isMetaProperty = true;
- if (name !== id) {
- error("E057", state.tokens.prev, left, id);
- } else {
- c();
- }
- return state.tokens.curr;
- }
- }
- //object literals
- (function(x) {
- x.nud = function(context) {
- var b, f, i, params, t, isGeneratorMethod = false, nextVal;
- var props = Object.create(null); // All properties, including accessors
- var isAsyncMethod = false;
- b = !sameLine(state.tokens.curr, state.tokens.next);
- if (b) {
- indent += state.option.indent;
- if (state.tokens.next.from === indent + state.option.indent) {
- /* istanbul ignore next */
- indent += state.option.indent;
- }
- }
- var blocktype = lookupBlockType();
- if (blocktype.isDestAssign) {
- this.destructAssign = destructuringPattern(context, {
- openingParsed: true,
- assignment: true
- });
- return this;
- }
- state.inObjectBody = true;
- for (;;) {
- if (state.tokens.next.id === "}") {
- break;
- }
- nextVal = state.tokens.next.value;
- if (state.tokens.next.identifier &&
- (peekIgnoreEOL().id === "," || peekIgnoreEOL().id === "}")) {
- if (!state.inES6()) {
- warning("W104", state.tokens.next, "object short notation", "6");
- }
- t = expression(context, 10);
- i = t && t.value;
- if (t) {
- saveProperty(props, i, t);
- }
- } else if (peek().id !== ":" && (nextVal === "get" || nextVal === "set")) {
- advance(nextVal);
- if (!state.inES5()) {
- error("E034");
- }
- if (state.tokens.next.id === "[") {
- i = computedPropertyName(context);
- } else {
- i = propertyName(context);
- // ES6 allows for get() {...} and set() {...} method
- // definition shorthand syntax, so we don't produce an error
- // if linting ECMAScript 6 code.
- if (!i && !state.inES6()) {
- error("E035");
- }
- }
- // We don't want to save this getter unless it's an actual getter
- // and not an ES6 concise method
- if (i) {
- saveAccessor(nextVal, props, i, state.tokens.curr);
- }
- t = state.tokens.next;
- f = doFunction(context, { isMethod: true });
- params = f["(params)"];
- // Don't warn about getter/setter pairs if this is an ES6 concise method
- if (nextVal === "get" && i && params.length) {
- warning("W076", t, params[0], i);
- } else if (nextVal === "set" && i && f["(metrics)"].arity !== 1) {
- warning("W077", t, i);
- }
- } else if (spreadrest("spread")) {
- if (!state.inES9()) {
- warning("W119", state.tokens.next, "object spread property", "9");
- }
- expression(context, 10);
- } else {
- if (state.tokens.next.id === "async" && !checkPunctuators(peek(), ["(", ":"])) {
- if (!state.inES8()) {
- warning("W119", state.tokens.next, "async functions", "8");
- }
- isAsyncMethod = true;
- advance();
- nolinebreak(state.tokens.curr);
- } else {
- isAsyncMethod = false;
- }
- if (state.tokens.next.value === "*" && state.tokens.next.type === "(punctuator)") {
- if (isAsyncMethod && !state.inES9()) {
- warning("W119", state.tokens.next, "async generators", "9");
- } else if (!state.inES6()) {
- warning("W104", state.tokens.next, "generator functions", "6");
- }
- advance("*");
- isGeneratorMethod = true;
- } else {
- isGeneratorMethod = false;
- }
- if (state.tokens.next.id === "[") {
- i = computedPropertyName(context);
- state.nameStack.set(i);
- } else {
- state.nameStack.set(state.tokens.next);
- i = propertyName(context);
- saveProperty(props, i, state.tokens.next);
- if (typeof i !== "string") {
- break;
- }
- }
- if (state.tokens.next.value === "(") {
- if (!state.inES6()) {
- warning("W104", state.tokens.curr, "concise methods", "6");
- }
- doFunction(isAsyncMethod ? context | prodParams.preAsync : context, {
- isMethod: true,
- type: isGeneratorMethod ? "generator" : null
- });
- } else {
- advance(":");
- expression(context, 10);
- }
- }
- countMember(i);
- if (state.tokens.next.id === ",") {
- advance(",");
- checkComma({ allowTrailing: true, property: true });
- if (state.tokens.next.id === ",") {
- /* istanbul ignore next */
- warning("W070", state.tokens.curr);
- } else if (state.tokens.next.id === "}" && !state.inES5()) {
- warning("W070", state.tokens.curr);
- }
- } else {
- if (state.option.trailingcomma && state.inES5()) {
- warningAt("W140", state.tokens.curr.line, state.tokens.curr.character);
- }
- break;
- }
- }
- if (b) {
- indent -= state.option.indent;
- }
- advance("}", this);
- checkProperties(props);
- state.inObjectBody = false;
- return this;
- };
- x.fud = function() {
- /* istanbul ignore next */
- error("E036", state.tokens.curr);
- };
- }(delim("{")));
- function destructuringPattern(context, options) {
- var isAssignment = options && options.assignment;
- context &= ~prodParams.noin;
- if (!state.inES6()) {
- warning("W104", state.tokens.curr,
- isAssignment ? "destructuring assignment" : "destructuring binding", "6");
- }
- return destructuringPatternRecursive(context, options);
- }
- function destructuringPatternRecursive(context, options) {
- var ids, idx;
- var identifiers = [];
- var openingParsed = options && options.openingParsed;
- var isAssignment = options && options.assignment;
- var recursiveOptions = isAssignment ? { assignment: isAssignment } : null;
- var firstToken = openingParsed ? state.tokens.curr : state.tokens.next;
- var nextInnerDE = function() {
- var ident;
- if (checkPunctuators(state.tokens.next, ["[", "{"])) {
- ids = destructuringPatternRecursive(context, recursiveOptions);
- for (idx = 0; idx < ids.length; idx++) {
- identifiers.push({ id: ids[idx].id, token: ids[idx].token });
- }
- } else if (checkPunctuator(state.tokens.next, ",")) {
- identifiers.push({ id: null, token: state.tokens.curr });
- } else if (checkPunctuator(state.tokens.next, "(")) {
- advance("(");
- nextInnerDE();
- advance(")");
- } else {
- if (isAssignment) {
- var assignTarget = expression(context, 20);
- if (assignTarget) {
- checkLeftSideAssign(context, assignTarget);
- // if the target was a simple identifier, add it to the list to return
- if (assignTarget.identifier) {
- ident = assignTarget.value;
- }
- }
- } else {
- ident = identifier(context);
- }
- if (ident) {
- identifiers.push({ id: ident, token: state.tokens.curr });
- }
- }
- };
- var assignmentProperty = function(context) {
- var id, expr;
- if (checkPunctuator(state.tokens.next, "[")) {
- advance("[");
- expression(context, 10);
- advance("]");
- advance(":");
- nextInnerDE();
- } else if (state.tokens.next.id === "(string)" ||
- state.tokens.next.id === "(number)") {
- advance();
- advance(":");
- nextInnerDE();
- } else {
- // this id will either be the property name or the property name and the assigning identifier
- var isRest = spreadrest("rest");
- if (isRest) {
- if (!state.inES9()) {
- warning("W119", state.tokens.next, "object rest property", "9");
- }
- // Due to visual symmetry with the array rest property (and the early
- // design of the language feature), developers may mistakenly assume
- // any expression is valid in this position. If the next token is not
- // an identifier, attempt to parse an expression and issue an error.
- // order to recover more gracefully from this condition.
- if (state.tokens.next.type === "(identifier)") {
- id = identifier(context);
- } else {
- expr = expression(context, 10);
- error("E030", expr, expr.value);
- }
- } else {
- id = identifier(context);
- }
- if (!isRest && checkPunctuator(state.tokens.next, ":")) {
- advance(":");
- nextInnerDE();
- } else if (id) {
- // in this case we are assigning (not declaring), so check assignment
- if (isAssignment) {
- checkLeftSideAssign(context, state.tokens.curr);
- }
- identifiers.push({ id: id, token: state.tokens.curr });
- }
- if (isRest && checkPunctuator(state.tokens.next, ",")) {
- warning("W130", state.tokens.next);
- }
- }
- };
- var id, value;
- if (checkPunctuator(firstToken, "[")) {
- if (!openingParsed) {
- advance("[");
- }
- if (checkPunctuator(state.tokens.next, "]")) {
- warning("W137", state.tokens.curr);
- }
- var element_after_rest = false;
- while (!checkPunctuator(state.tokens.next, "]")) {
- var isRest = spreadrest("rest");
- nextInnerDE();
- if (isRest && !element_after_rest &&
- checkPunctuator(state.tokens.next, ",")) {
- warning("W130", state.tokens.next);
- element_after_rest = true;
- }
- if (!isRest && checkPunctuator(state.tokens.next, "=")) {
- if (checkPunctuator(state.tokens.prev, "...")) {
- /* istanbul ignore next */
- advance("]");
- } else {
- advance("=");
- }
- id = state.tokens.prev;
- value = expression(context, 10);
- if (value && value.identifier && value.value === "undefined") {
- warning("W080", id, id.value);
- }
- }
- if (!checkPunctuator(state.tokens.next, "]")) {
- advance(",");
- }
- }
- advance("]");
- } else if (checkPunctuator(firstToken, "{")) {
- if (!openingParsed) {
- advance("{");
- }
- if (checkPunctuator(state.tokens.next, "}")) {
- warning("W137", state.tokens.curr);
- }
- while (!checkPunctuator(state.tokens.next, "}")) {
- assignmentProperty(context);
- if (checkPunctuator(state.tokens.next, "=")) {
- advance("=");
- id = state.tokens.prev;
- value = expression(context, 10);
- if (value && value.identifier && value.value === "undefined") {
- warning("W080", id, id.value);
- }
- }
- if (!checkPunctuator(state.tokens.next, "}")) {
- advance(",");
- if (checkPunctuator(state.tokens.next, "}")) {
- // Trailing comma
- // ObjectBindingPattern: { BindingPropertyList , }
- break;
- }
- }
- }
- advance("}");
- }
- return identifiers;
- }
- function destructuringPatternMatch(tokens, value) {
- var first = value.first;
- if (!first)
- return;
- _.zip(tokens, Array.isArray(first) ? first : [ first ]).forEach(function(val) {
- var token = val[0];
- var value = val[1];
- if (token && value)
- token.first = value;
- else if (token && token.first && !value)
- /* istanbul ignore next */
- warning("W080", token.first, token.first.value);
- });
- }
- function blockVariableStatement(type, statement, context) {
- // used for both let and const statements
- var noin = context & prodParams.noin;
- var isLet = type === "let";
- var isConst = type === "const";
- var tokens, lone, value, letblock;
- if (!state.inES6()) {
- warning("W104", state.tokens.curr, type, "6");
- }
- if (isLet && isMozillaLet()) {
- advance("(");
- state.funct["(scope)"].stack();
- letblock = true;
- statement.declaration = false;
- }
- statement.first = [];
- for (;;) {
- var names = [];
- if (_.includes(["{", "["], state.tokens.next.value)) {
- tokens = destructuringPattern(context);
- lone = false;
- } else {
- tokens = [ { id: identifier(context), token: state.tokens.curr } ];
- lone = true;
- }
- // A `const` declaration without an initializer is permissible within the
- // head of for-in and for-of statements. If this binding list is being
- // parsed as part of a `for` statement of any kind, allow the initializer
- // to be omitted. Although this may erroneously allow such forms from
- // "C-style" `for` statements (i.e. `for (const x;;) {}`, the `for`
- // statement logic includes dedicated logic to issue the error for such
- // cases.
- if (!noin && isConst && state.tokens.next.id !== "=") {
- warning("E012", state.tokens.curr, state.tokens.curr.value);
- }
- for (var t in tokens) {
- if (tokens.hasOwnProperty(t)) {
- t = tokens[t];
- // It is a Syntax Error if the BoundNames of BindingList contains
- // "let".
- if (t.id === "let") {
- /* istanbul ignore next */
- warning("W024", t.token, t.id);
- }
- if (state.funct["(scope)"].block.isGlobal()) {
- if (predefined[t.id] === false) {
- warning("W079", t.token, t.id);
- }
- }
- if (t.id) {
- state.funct["(scope)"].addbinding(t.id, {
- type: type,
- token: t.token });
- names.push(t.token);
- }
- }
- }
- if (state.tokens.next.id === "=") {
- statement.hasInitializer = true;
- advance("=");
- if (!noin && peek(0).id === "=" && state.tokens.next.identifier) {
- warning("W120", state.tokens.next, state.tokens.next.value);
- }
- var id = state.tokens.prev;
- value = expression(context, 10);
- if (value) {
- if (value.identifier && value.value === "undefined") {
- warning("W080", id, id.value);
- }
- if (!lone) {
- destructuringPatternMatch(names, value);
- }
- }
- }
- // Bindings are not immediately initialized in for-in and for-of
- // statements. As with `const` initializers (described above), the `for`
- // statement parsing logic includes
- if (state.tokens.next.value !== "in" && state.tokens.next.value !== "of") {
- for (t in tokens) {
- if (tokens.hasOwnProperty(t)) {
- t = tokens[t];
- state.funct["(scope)"].initialize(t.id);
- }
- }
- }
- statement.first = statement.first.concat(names);
- if (state.tokens.next.id !== ",") {
- break;
- }
- statement.hasComma = true;
- advance(",");
- checkComma();
- }
- if (letblock) {
- advance(")");
- block(context, true, true);
- statement.block = true;
- state.funct["(scope)"].unstack();
- }
- return statement;
- }
- var conststatement = stmt("const", function(context) {
- return blockVariableStatement("const", this, context);
- });
- conststatement.exps = true;
- conststatement.declaration = true;
- /**
- * Determine if the current `let` token designates the beginning of a "let
- * block" or "let expression" as implemented in the Mozilla SpiderMonkey
- * engine.
- *
- * This function will only return `true` if Mozilla extensions have been
- * enabled. It would be preferable to detect the language feature regardless
- * of the parser's state because this would allow JSHint to instruct users to
- * enable the `moz` option where necessary. This is not possible because the
- * language extension is not compatible with standard JavaScript. For
- * example, the following program code may describe a "let block" or a
- * function invocation:
- *
- * let(x)
- * {
- * typeof x;
- * }
- *
- * @returns {boolean}
- */
- function isMozillaLet() {
- return state.tokens.next.id === "(" && state.inMoz();
- }
- var letstatement = stmt("let", function(context) {
- return blockVariableStatement("let", this, context);
- });
- letstatement.nud = function(context, rbp) {
- if (isMozillaLet()) {
- // create a new block scope we use only for the current expression
- state.funct["(scope)"].stack();
- advance("(");
- state.tokens.prev.fud(context);
- advance(")");
- expression(context, rbp);
- state.funct["(scope)"].unstack();
- } else {
- this.exps = false;
- return state.syntax["(identifier)"].nud.apply(this, arguments);
- }
- };
- letstatement.meta = { es5: true, isFutureReservedWord: false, strictOnly: true };
- letstatement.exps = true;
- letstatement.declaration = true;
- letstatement.useFud = function(context) {
- var next = state.tokens.next;
- var nextIsBindingName;
- if (this.line !== next.line && !state.inES6()) {
- return false;
- }
- // JSHint generally interprets `let` as a reserved word even though it is
- // not considered as such by the ECMAScript specification because doing so
- // simplifies parsing logic. It is special-cased here so that code such as
- //
- // let
- // let
- //
- // is correctly interpreted as an invalid LexicalBinding. (Without this
- // consideration, the code above would be parsed as two
- // IdentifierReferences.)
- nextIsBindingName = next.identifier && (!isReserved(context, next) ||
- next.id === "let");
- return nextIsBindingName || checkPunctuators(next, ["{", "["]) ||
- isMozillaLet();
- };
- var varstatement = stmt("var", function(context) {
- var noin = context & prodParams.noin;
- var tokens, lone, value, id;
- this.first = [];
- for (;;) {
- var names = [];
- if (_.includes(["{", "["], state.tokens.next.value)) {
- tokens = destructuringPattern(context);
- lone = false;
- } else {
- tokens = [];
- id = identifier(context);
- if (id) {
- tokens.push({ id: id, token: state.tokens.curr });
- }
- lone = true;
- }
- if (state.option.varstmt) {
- warning("W132", this);
- }
- for (var t in tokens) {
- if (tokens.hasOwnProperty(t)) {
- t = tokens[t];
- if (state.funct["(global)"] && !state.impliedClosure()) {
- if (predefined[t.id] === false) {
- warning("W079", t.token, t.id);
- } else if (state.option.futurehostile === false) {
- if ((!state.inES5() && vars.ecmaIdentifiers[5][t.id] === false) ||
- (!state.inES6() && vars.ecmaIdentifiers[6][t.id] === false)) {
- warning("W129", t.token, t.id);
- }
- }
- }
- if (t.id) {
- state.funct["(scope)"].addbinding(t.id, {
- type: "var",
- token: t.token });
- names.push(t.token);
- }
- }
- }
- if (state.tokens.next.id === "=") {
- this.hasInitializer = true;
- state.nameStack.set(state.tokens.curr);
- advance("=");
- if (peek(0).id === "=" && state.tokens.next.identifier) {
- if (!noin &&
- !state.funct["(params)"] ||
- state.funct["(params)"].indexOf(state.tokens.next.value) === -1) {
- warning("W120", state.tokens.next, state.tokens.next.value);
- }
- }
- id = state.tokens.prev;
- value = expression(context, 10);
- if (value) {
- if (!state.funct["(loopage)"] && value.identifier &&
- value.value === "undefined") {
- warning("W080", id, id.value);
- }
- if (!lone) {
- destructuringPatternMatch(names, value);
- }
- }
- }
- this.first = this.first.concat(names);
- if (state.tokens.next.id !== ",") {
- break;
- }
- this.hasComma = true;
- advance(",");
- checkComma();
- }
- return this;
- });
- varstatement.exps = true;
- blockstmt("function", function(context) {
- var inexport = context & prodParams.export;
- var generator = false;
- var isAsync = context & prodParams.preAsync;
- var labelType = "";
- if (isAsync) {
- labelType = "async ";
- }
- if (state.tokens.next.value === "*") {
- if (isAsync && !state.inES9()) {
- warning("W119", state.tokens.prev, "async generators", "9");
- } else if (!isAsync && !state.inES6(true)) {
- warning("W119", state.tokens.next, "function*", "6");
- }
- advance("*");
- labelType += "generator ";
- generator = true;
- }
- labelType += "function";
- if (inblock) {
- warning("W082", state.tokens.curr);
- }
- this.name = optionalidentifier(context) ? state.tokens.curr : null;
- if (!this.name) {
- if (!inexport) {
- warning("W025");
- }
- } else {
- state.funct["(scope)"].addbinding(this.name.value, {
- type: labelType,
- token: state.tokens.curr,
- initialized: true });
- }
- var f = doFunction(context, {
- name: this.name && this.name.value,
- statement: this,
- type: generator ? "generator" : null,
- ignoreLoopFunc: inblock // a declaration may already have warned
- });
- // If the function declaration is strict because the surrounding code is
- // strict, the invalid name will trigger E008 when the scope manager
- // attempts to create a binding in the strict environment record. An error
- // should only be signaled here when the function itself enables strict
- // mode (the scope manager will not report an error because a declaration
- // does not introduce a binding into the function's environment record).
- var enablesStrictMode = f["(isStrict)"] && !state.isStrict();
- if (this.name && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
- enablesStrictMode) {
- error("E008", this.name);
- }
- // Although the parser correctly recognizes the statement boundary in this
- // condition, it's support for the invalid "empty grouping" expression
- // makes it tolerant of productions such as `function f() {}();`.
- if (state.tokens.next.id === "(" && peek().id === ")" && peek(1).id !== "=>" &&
- state.tokens.next.line === state.tokens.curr.line) {
- error("E039");
- }
- return this;
- }).declaration = true;
- prefix("function", function(context) {
- var generator = false;
- var isAsync = context & prodParams.preAsync;
- if (state.tokens.next.value === "*") {
- if (isAsync && !state.inES9()) {
- warning("W119", state.tokens.prev, "async generators", "9");
- } else if (!isAsync && !state.inES6(true)) {
- warning("W119", state.tokens.curr, "function*", "6");
- }
- advance("*");
- generator = true;
- }
- // This context modification restricts the use of `await` as the optional
- // BindingIdentifier in async function expressions.
- this.name = optionalidentifier(isAsync ? context | prodParams.async : context) ?
- state.tokens.curr : null;
- var f = doFunction(context, {
- name: this.name && this.name.value,
- type: generator ? "generator" : null
- });
- if (generator && this.name && this.name.value === "yield") {
- error("E024", this.name, "yield");
- }
- if (this.name && (f["(name)"] === "arguments" || f["(name)"] === "eval") &&
- f["(isStrict)"]) {
- error("E008", this.name);
- }
- return this;
- });
- blockstmt("if", function(context) {
- var t = state.tokens.next;
- increaseComplexityCount();
- advance("(");
- var expr = expression(context, 0);
- if (!expr) {
- quit("E041", this);
- }
- checkCondAssignment(expr);
- // When the if is within a for-in loop, check if the condition
- // starts with a negation operator
- var forinifcheck = null;
- if (state.option.forin && state.forinifcheckneeded) {
- state.forinifcheckneeded = false; // We only need to analyze the first if inside the loop
- forinifcheck = state.forinifchecks[state.forinifchecks.length - 1];
- if (expr.type === "(punctuator)" && expr.value === "!") {
- forinifcheck.type = "(negative)";
- } else {
- forinifcheck.type = "(positive)";
- }
- }
- advance(")", t);
- var s = block(context, true, true);
- // When the if is within a for-in loop and the condition has a negative form,
- // check if the body contains nothing but a continue statement
- if (forinifcheck && forinifcheck.type === "(negative)") {
- if (s && s[0] && s[0].type === "(identifier)" && s[0].value === "continue") {
- forinifcheck.type = "(negative-with-continue)";
- }
- }
- if (state.tokens.next.id === "else") {
- advance("else");
- if (state.tokens.next.id === "if" || state.tokens.next.id === "switch") {
- statement(context);
- } else {
- block(context, true, true);
- }
- }
- return this;
- });
- blockstmt("try", function(context) {
- var b;
- var hasParameter = false;
- function catchParameter() {
- advance("(");
- if (checkPunctuators(state.tokens.next, ["[", "{"])) {
- var tokens = destructuringPattern(context);
- _.each(tokens, function(token) {
- if (token.id) {
- state.funct["(scope)"].addParam(token.id, token.token, "exception");
- }
- });
- } else if (state.tokens.next.type !== "(identifier)") {
- warning("E030", state.tokens.next, state.tokens.next.value);
- } else {
- // only advance if an identifier is present. This allows JSHint to
- // recover from the case where no value is specified.
- state.funct["(scope)"].addParam(identifier(context), state.tokens.curr, "exception");
- }
- if (state.tokens.next.value === "if") {
- if (!state.inMoz()) {
- warning("W118", state.tokens.curr, "catch filter");
- }
- advance("if");
- expression(context, 0);
- }
- advance(")");
- }
- block(context | prodParams.tryClause, true);
- while (state.tokens.next.id === "catch") {
- increaseComplexityCount();
- if (b && (!state.inMoz())) {
- warning("W118", state.tokens.next, "multiple catch blocks");
- }
- advance("catch");
- if (state.tokens.next.id !== "{") {
- state.funct["(scope)"].stack("catchparams");
- hasParameter = true;
- catchParameter();
- } else if (!state.inES10()) {
- warning("W119", state.tokens.curr, "optional catch binding", "10");
- }
- block(context, false);
- if (hasParameter) {
- state.funct["(scope)"].unstack();
- hasParameter = false;
- }
- b = true;
- }
- if (state.tokens.next.id === "finally") {
- advance("finally");
- block(context, true);
- return;
- }
- if (!b) {
- error("E021", state.tokens.next, "catch", state.tokens.next.value);
- }
- return this;
- });
- blockstmt("while", function(context) {
- var t = state.tokens.next;
- state.funct["(breakage)"] += 1;
- state.funct["(loopage)"] += 1;
- increaseComplexityCount();
- advance("(");
- checkCondAssignment(expression(context, 0));
- advance(")", t);
- block(context, true, true);
- state.funct["(breakage)"] -= 1;
- state.funct["(loopage)"] -= 1;
- return this;
- }).labelled = true;
- blockstmt("with", function(context) {
- var t = state.tokens.next;
- if (state.isStrict()) {
- error("E010", state.tokens.curr);
- } else if (!state.option.withstmt) {
- warning("W085", state.tokens.curr);
- }
- advance("(");
- expression(context, 0);
- advance(")", t);
- block(context, true, true);
- return this;
- });
- blockstmt("switch", function(context) {
- var t = state.tokens.next;
- var g = false;
- var noindent = false;
- var seenCase = false;
- state.funct["(breakage)"] += 1;
- advance("(");
- checkCondAssignment(expression(context, 0));
- advance(")", t);
- t = state.tokens.next;
- advance("{");
- state.funct["(scope)"].stack();
- if (state.tokens.next.from === indent)
- noindent = true;
- if (!noindent)
- indent += state.option.indent;
- for (;;) {
- switch (state.tokens.next.id) {
- case "case":
- switch (state.funct["(verb)"]) {
- case "yield":
- case "break":
- case "case":
- case "continue":
- case "return":
- case "switch":
- case "throw":
- break;
- case "default":
- if (state.option.leanswitch) {
- warning("W145", state.tokens.next);
- }
- break;
- default:
- // You can tell JSHint that you don't use break intentionally by
- // adding a comment /* falls through */ on a line just before
- // the next `case`.
- if (!state.tokens.curr.caseFallsThrough) {
- warning("W086", state.tokens.curr, "case");
- }
- }
- advance("case");
- expression(context, 0);
- seenCase = true;
- increaseComplexityCount();
- g = true;
- advance(":");
- state.funct["(verb)"] = "case";
- break;
- case "default":
- switch (state.funct["(verb)"]) {
- case "yield":
- case "break":
- case "continue":
- case "return":
- case "throw":
- break;
- case "case":
- if (state.option.leanswitch) {
- warning("W145", state.tokens.curr);
- }
- break;
- default:
- // Do not display a warning if 'default' is the first statement or if
- // there is a special /* falls through */ comment.
- if (seenCase && !state.tokens.curr.caseFallsThrough) {
- warning("W086", state.tokens.curr, "default");
- }
- }
- advance("default");
- g = true;
- advance(":");
- state.funct["(verb)"] = "default";
- break;
- case "}":
- if (!noindent)
- indent -= state.option.indent;
- advance("}", t);
- state.funct["(scope)"].unstack();
- state.funct["(breakage)"] -= 1;
- state.funct["(verb)"] = undefined;
- return;
- /* istanbul ignore next */
- case "(end)":
- error("E023", state.tokens.next, "}");
- return;
- default:
- indent += state.option.indent;
- if (g) {
- switch (state.tokens.curr.id) {
- /* istanbul ignore next */
- case ",":
- error("E040");
- return;
- case ":":
- g = false;
- statements(context);
- break;
- /* istanbul ignore next */
- default:
- error("E025", state.tokens.curr);
- return;
- }
- } else {
- /* istanbul ignore else */
- if (state.tokens.curr.id === ":") {
- advance(":");
- error("E024", state.tokens.curr, ":");
- statements(context);
- } else {
- error("E021", state.tokens.next, "case", state.tokens.next.value);
- return;
- }
- }
- indent -= state.option.indent;
- }
- }
- }).labelled = true;
- stmt("debugger", function() {
- if (!state.option.debug) {
- warning("W087", this);
- }
- return this;
- }).exps = true;
- (function() {
- var x = stmt("do", function(context) {
- state.funct["(breakage)"] += 1;
- state.funct["(loopage)"] += 1;
- increaseComplexityCount();
- this.first = block(context, true, true);
- advance("while");
- var t = state.tokens.next;
- advance("(");
- checkCondAssignment(expression(context, 0));
- advance(")", t);
- state.funct["(breakage)"] -= 1;
- state.funct["(loopage)"] -= 1;
- return this;
- });
- x.labelled = true;
- x.exps = true;
- }());
- blockstmt("for", function(context) {
- var s, t = state.tokens.next;
- var letscope = false;
- var isAsync = false;
- var foreachtok = null;
- if (t.value === "each") {
- foreachtok = t;
- advance("each");
- if (!state.inMoz()) {
- warning("W118", state.tokens.curr, "for each");
- }
- }
- if (state.tokens.next.identifier && state.tokens.next.value === "await") {
- advance("await");
- isAsync = true;
- if (!(context & prodParams.async)) {
- error("E024", state.tokens.curr, "await");
- } else if (!state.inES9()) {
- warning("W119", state.tokens.curr, "asynchronous iteration", "9");
- }
- }
- increaseComplexityCount();
- advance("(");
- // what kind of for(…) statement it is? for(…of…)? for(…in…)? for(…;…;…)?
- var nextop; // contains the token of the "in" or "of" operator
- var comma; // First comma punctuator at level 0
- var initializer; // First initializer at level 0
- var bindingPower;
- var targets;
- var target;
- var decl;
- var afterNext = peek();
- var headContext = context | prodParams.noin;
- if (state.tokens.next.id === "var") {
- advance("var");
- decl = state.tokens.curr.fud(headContext);
- comma = decl.hasComma ? decl : null;
- initializer = decl.hasInitializer ? decl : null;
- } else if (state.tokens.next.id === "const" ||
- // The "let" keyword only signals a lexical binding if it is followed by
- // an identifier, `{`, or `[`. Otherwise, it should be parsed as an
- // IdentifierReference (i.e. in a subsquent branch).
- (state.tokens.next.id === "let" &&
- ((afterNext.identifier && afterNext.id !== "in") ||
- checkPunctuators(afterNext, ["{", "["])))) {
- advance(state.tokens.next.id);
- // create a new block scope
- letscope = true;
- state.funct["(scope)"].stack();
- decl = state.tokens.curr.fud(headContext);
- comma = decl.hasComma ? decl : null;
- initializer = decl.hasInitializer ? decl : null;
- } else if (!checkPunctuator(state.tokens.next, ";")) {
- targets = [];
- while (state.tokens.next.value !== "in" &&
- state.tokens.next.value !== "of" &&
- !checkPunctuator(state.tokens.next, ";")) {
- if (checkPunctuators(state.tokens.next, ["{", "["])) {
- destructuringPattern(headContext, { assignment: true })
- .forEach(function(elem) {
- this.push(elem.token);
- }, targets);
- if (checkPunctuator(state.tokens.next, "=")) {
- advance("=");
- initializer = state.tokens.curr;
- expression(headContext, 10);
- }
- } else {
- target = expression(headContext, 10);
- if (target) {
- if (target.type === "(identifier)") {
- targets.push(target);
- } else if (checkPunctuator(target, "=")) {
- initializer = target;
- targets.push(target);
- }
- }
- }
- if (checkPunctuator(state.tokens.next, ",")) {
- advance(",");
- if (!comma) {
- comma = state.tokens.curr;
- }
- }
- }
- //checkLeftSideAssign(target, nextop);
- // In the event of a syntax error, do not issue warnings regarding the
- // implicit creation of bindings.
- if (!initializer && !comma) {
- targets.forEach(function(token) {
- if (!state.funct["(scope)"].has(token.value)) {
- warning("W088", token, token.value);
- }
- });
- }
- }
- nextop = state.tokens.next;
- if (isAsync && nextop.value !== "of") {
- error("E066", nextop);
- }
- // if we're in a for (… in|of …) statement
- if (_.includes(["in", "of"], nextop.value)) {
- if (nextop.value === "of") {
- bindingPower = 20;
- if (!state.inES6()) {
- warning("W104", nextop, "for of", "6");
- }
- } else {
- bindingPower = 0;
- }
- if (comma) {
- error("W133", comma, nextop.value, "more than one ForBinding");
- }
- if (initializer) {
- error("W133", initializer, nextop.value, "initializer is forbidden");
- }
- if (target && !comma && !initializer) {
- checkLeftSideAssign(context, target, nextop);
- }
- advance(nextop.value);
- // The binding power is variable because for-in statements accept any
- // Expression in this position, while for-of statements are limited to
- // AssignmentExpressions. For example:
- //
- // for ( LeftHandSideExpression in Expression ) Statement
- // for ( LeftHandSideExpression of AssignmentExpression ) Statement
- expression(context, bindingPower);
- advance(")", t);
- if (nextop.value === "in" && state.option.forin) {
- state.forinifcheckneeded = true;
- if (state.forinifchecks === undefined) {
- state.forinifchecks = [];
- }
- // Push a new for-in-if check onto the stack. The type will be modified
- // when the loop's body is parsed and a suitable if statement exists.
- state.forinifchecks.push({
- type: "(none)"
- });
- }
- state.funct["(breakage)"] += 1;
- state.funct["(loopage)"] += 1;
- s = block(context, true, true);
- if (nextop.value === "in" && state.option.forin) {
- if (state.forinifchecks && state.forinifchecks.length > 0) {
- var check = state.forinifchecks.pop();
- if (// No if statement or not the first statement in loop body
- s && s.length > 0 && (typeof s[0] !== "object" || s[0].value !== "if") ||
- // Positive if statement is not the only one in loop body
- check.type === "(positive)" && s.length > 1 ||
- // Negative if statement but no continue
- check.type === "(negative)") {
- warning("W089", this);
- }
- }
- // Reset the flag in case no if statement was contained in the loop body
- state.forinifcheckneeded = false;
- }
- state.funct["(breakage)"] -= 1;
- state.funct["(loopage)"] -= 1;
- } else {
- if (foreachtok) {
- error("E045", foreachtok);
- }
- advance(";");
- if (decl && decl.first && decl.first[0]) {
- if (decl.value === "const" && !decl.hasInitializer) {
- warning("E012", decl, decl.first[0].value);
- }
- decl.first.forEach(function(token) {
- state.funct["(scope)"].initialize(token.value);
- });
- }
- // start loopage after the first ; as the next two expressions are executed
- // on every loop
- state.funct["(loopage)"] += 1;
- if (state.tokens.next.id !== ";") {
- checkCondAssignment(expression(context, 0));
- }
- advance(";");
- if (state.tokens.next.id === ";") {
- error("E021", state.tokens.next, ")", ";");
- }
- if (state.tokens.next.id !== ")") {
- for (;;) {
- expression(context, 0);
- if (state.tokens.next.id !== ",") {
- break;
- }
- advance(",");
- checkComma();
- }
- }
- advance(")", t);
- state.funct["(breakage)"] += 1;
- block(context, true, true);
- state.funct["(breakage)"] -= 1;
- state.funct["(loopage)"] -= 1;
- }
- // unstack loop blockscope
- if (letscope) {
- state.funct["(scope)"].unstack();
- }
- return this;
- }).labelled = true;
- stmt("break", function() {
- var v = state.tokens.next.value;
- if (state.tokens.next.identifier &&
- sameLine(state.tokens.curr, state.tokens.next)) {
- if (!state.funct["(scope)"].funct.hasLabel(v)) {
- warning("W090", state.tokens.next, v);
- }
- this.first = state.tokens.next;
- advance();
- } else {
- if (state.funct["(breakage)"] === 0)
- warning("W052", state.tokens.next, this.value);
- }
- reachable(this);
- return this;
- }).exps = true;
- stmt("continue", function() {
- var v = state.tokens.next.value;
- if (state.funct["(breakage)"] === 0 || !state.funct["(loopage)"]) {
- warning("W052", state.tokens.next, this.value);
- }
- if (state.tokens.next.identifier) {
- if (sameLine(state.tokens.curr, state.tokens.next)) {
- if (!state.funct["(scope)"].funct.hasLabel(v)) {
- warning("W090", state.tokens.next, v);
- }
- this.first = state.tokens.next;
- advance();
- }
- }
- reachable(this);
- return this;
- }).exps = true;
- stmt("return", function(context) {
- if (sameLine(this, state.tokens.next)) {
- if (state.tokens.next.id !== ";" && !state.tokens.next.reach) {
- this.first = expression(context, 0);
- if (this.first &&
- this.first.type === "(punctuator)" && this.first.value === "=" &&
- !this.first.paren && !state.option.boss) {
- warning("W093", this.first);
- }
- if (state.option.noreturnawait && context & prodParams.async &&
- !(context & prodParams.tryClause) &&
- this.first.identifier && this.first.value === "await") {
- warning("W146", this.first);
- }
- }
- } else {
- if (state.tokens.next.type === "(punctuator)" &&
- ["[", "{", "+", "-"].indexOf(state.tokens.next.value) > -1) {
- nolinebreak(this); // always warn (Line breaking error)
- }
- }
- reachable(this);
- return this;
- }).exps = true;
- prefix("await", function(context) {
- if (context & prodParams.async) {
- // If the parameters of the current function scope have not been defined,
- // it is because the current expression is contained within the parameter
- // list.
- if (!state.funct["(params)"]) {
- error("E024", this, "await");
- }
- expression(context, 10);
- return this;
- } else {
- this.exps = false;
- return state.syntax["(identifier)"].nud.apply(this, arguments);
- }
- }).exps = true;
- (function(asyncSymbol) {
- asyncSymbol.meta = { es5: true, isFutureReservedWord: true, strictOnly: true };
- asyncSymbol.isFunc = function() {
- var next = state.tokens.next;
- var afterParens;
- if (this.line !== next.line) {
- return false;
- }
- if (next.id === "function") {
- return true;
- }
- if (next.id === "(") {
- afterParens = peekThroughParens(0);
- return afterParens.id === "=>";
- }
- if (next.identifier) {
- return peek().id === "=>";
- }
- return false;
- };
- asyncSymbol.useFud = asyncSymbol.isFunc;
- // async function declaration
- asyncSymbol.fud = function(context) {
- if (!state.inES8()) {
- warning("W119", this, "async functions", "8");
- }
- context |= prodParams.preAsync;
- context |= prodParams.initial;
- this.func = expression(context, 0);
- this.block = this.func.block;
- this.exps = this.func.exps;
- return this;
- };
- asyncSymbol.exps = true;
- delete asyncSymbol.reserved;
- }(prefix("async", function(context, rbp) {
- if (this.isFunc(context)) {
- if (!state.inES8()) {
- warning("W119", this, "async functions", "8");
- }
- context |= prodParams.preAsync;
- this.func = expression(context, rbp);
- this.identifier = false;
- return this;
- }
- this.exps = false;
- return state.syntax["(identifier)"].nud.apply(this, arguments);
- })));
- (function(yieldSymbol) {
- yieldSymbol.rbp = yieldSymbol.lbp = 25;
- yieldSymbol.exps = true;
- })(prefix("yield", function(context) {
- if (state.inMoz()) {
- return mozYield.call(this, context);
- }
- if (!(context & prodParams.yield)) {
- this.exps = false;
- return state.syntax["(identifier)"].nud.apply(this, arguments);
- }
- var prev = state.tokens.prev;
- // If the parameters of the current function scope have not been defined,
- // it is because the current expression is contained within the parameter
- // list.
- if (!state.funct["(params)"]) {
- error("E024", this, "yield");
- }
- if (!this.beginsStmt && prev.lbp > 30 && !checkPunctuators(prev, ["("])) {
- error("E061", this);
- }
- if (!state.inES6()) {
- warning("W104", state.tokens.curr, "yield", "6");
- }
- state.funct["(yielded)"] = true;
- if (state.tokens.next.value === "*") {
- advance("*");
- }
- // Parse operand
- if (state.tokens.curr.value === "*" || sameLine(state.tokens.curr, state.tokens.next)) {
- if (state.tokens.next.nud) {
- nobreaknonadjacent(state.tokens.curr, state.tokens.next);
- this.first = expression(context, 10);
- if (this.first.type === "(punctuator)" && this.first.value === "=" &&
- !this.first.paren && !state.option.boss) {
- warning("W093", this.first);
- }
- } else if (state.tokens.next.led) {
- if (state.tokens.next.id !== ",") {
- error("W017", state.tokens.next);
- }
- }
- }
- return this;
- }));
- /**
- * Parsing logic for non-standard Mozilla implementation of `yield`
- * expressions.
- */
- var mozYield = function(context) {
- var prev = state.tokens.prev;
- if (state.inES6(true) && !(context & prodParams.yield)) {
- error("E046", state.tokens.curr, "yield");
- }
- state.funct["(yielded)"] = true;
- var delegatingYield = false;
- if (state.tokens.next.value === "*") {
- delegatingYield = true;
- advance("*");
- }
- if (sameLine(this, state.tokens.next)) {
- if (delegatingYield ||
- (state.tokens.next.id !== ";" && !state.option.asi &&
- !state.tokens.next.reach && state.tokens.next.nud)) {
- nobreaknonadjacent(state.tokens.curr, state.tokens.next);
- this.first = expression(context, 10);
- if (this.first.type === "(punctuator)" && this.first.value === "=" &&
- !this.first.paren && !state.option.boss) {
- warning("W093", this.first);
- }
- }
- if (state.tokens.next.id !== ")" &&
- (prev.lbp > 30 || (!prev.assign && !isEndOfExpr()))) {
- error("E050", this);
- }
- } else if (!state.option.asi) {
- nolinebreak(this); // always warn (Line breaking error)
- }
- return this;
- };
- stmt("throw", function(context) {
- nolinebreak(this);
- this.first = expression(context, 20);
- reachable(this);
- return this;
- }).exps = true;
- prefix("import", function(context) {
- var mp = metaProperty(context, "meta", function() {
- if (!state.inES11(true)) {
- warning("W119", state.tokens.prev, "import.meta", "11");
- }
- if (!state.option.module) {
- error("E070", state.tokens.prev);
- }
- });
- if (mp) {
- return mp;
- }
- if (!checkPunctuator(state.tokens.next, "(")) {
- return state.syntax["(identifier)"].nud.call(this, context);
- }
- if (!state.inES11()) {
- warning("W119", state.tokens.curr, "dynamic import", "11");
- }
- advance("(");
- expression(context, 10);
- advance(")");
- return this;
- });
- var importSymbol = stmt("import", function(context) {
- if (!state.funct["(scope)"].block.isGlobal()) {
- error("E053", state.tokens.curr, "Import");
- }
- if (!state.inES6()) {
- warning("W119", state.tokens.curr, "import", "6");
- }
- if (state.tokens.next.type === "(string)") {
- // ModuleSpecifier :: StringLiteral
- advance("(string)");
- return this;
- }
- if (state.tokens.next.identifier) {
- // ImportClause :: ImportedDefaultBinding
- this.name = identifier(context);
- // Import bindings are immutable (see ES6 8.1.1.5.5)
- state.funct["(scope)"].addbinding(this.name, {
- type: "import",
- initialized: true,
- token: state.tokens.curr });
- if (state.tokens.next.value === ",") {
- // ImportClause :: ImportedDefaultBinding , NameSpaceImport
- // ImportClause :: ImportedDefaultBinding , NamedImports
- advance(",");
- // At this point, we intentionally fall through to continue matching
- // either NameSpaceImport or NamedImports.
- // Discussion:
- // https://github.com/jshint/jshint/pull/2144#discussion_r23978406
- } else {
- advance("from");
- advance("(string)");
- return this;
- }
- }
- if (state.tokens.next.id === "*") {
- // ImportClause :: NameSpaceImport
- advance("*");
- advance("as");
- if (state.tokens.next.identifier) {
- this.name = identifier(context);
- // Import bindings are immutable (see ES6 8.1.1.5.5)
- state.funct["(scope)"].addbinding(this.name, {
- type: "import",
- initialized: true,
- token: state.tokens.curr });
- }
- } else {
- // ImportClause :: NamedImports
- advance("{");
- for (;;) {
- if (state.tokens.next.value === "}") {
- advance("}");
- break;
- }
- var importName;
- if (peek().value === "as") {
- identifier(context, true);
- advance("as");
- importName = identifier(context);
- } else {
- importName = identifier(context);
- }
- // Import bindings are immutable (see ES6 8.1.1.5.5)
- state.funct["(scope)"].addbinding(importName, {
- type: "import",
- initialized: true,
- token: state.tokens.curr });
- if (state.tokens.next.value === ",") {
- advance(",");
- } else if (state.tokens.next.value === "}") {
- advance("}");
- break;
- } else {
- error("E024", state.tokens.next, state.tokens.next.value);
- break;
- }
- }
- }
- // FromClause
- advance("from");
- advance("(string)");
- // Support for ES2015 modules was released without warning for `import`
- // declarations that lack bindings. Issuing a warning would therefor
- // constitute a breaking change.
- // TODO: enable this warning in JSHint 3
- // if (hasBindings) {
- // warning("W142", this, "import", moduleSpecifier);
- // }
- return this;
- });
- importSymbol.exps = true;
- importSymbol.reserved = true;
- importSymbol.meta = { isFutureReservedWord: true, es5: true };
- importSymbol.useFud = function() {
- return !(checkPunctuators(state.tokens.next, [".", "("]));
- };
- importSymbol.rbp = 161;
- stmt("export", function(context) {
- var ok = true;
- var token;
- var moduleSpecifier;
- context = context | prodParams.export;
- if (!state.inES6()) {
- warning("W119", state.tokens.curr, "export", "6");
- ok = false;
- }
- if (!state.funct["(scope)"].block.isGlobal()) {
- error("E053", state.tokens.curr, "Export");
- ok = false;
- }
- if (state.tokens.next.value === "*") {
- // ExportDeclaration :: export * FromClause
- // ExportDeclaration :: export * as IdentifierName FromClause
- advance("*");
- if (state.tokens.next.value === "as") {
- if (!state.inES11()) {
- warning("W119", state.tokens.curr, "export * as ns from", "11");
- }
- advance("as");
- identifier(context, true);
- state.funct["(scope)"].setExported(null, state.tokens.curr);
- }
- advance("from");
- advance("(string)");
- return this;
- }
- if (state.tokens.next.type === "default") {
- // ExportDeclaration ::
- // export default [lookahead ∉ { function, class }] AssignmentExpression[In] ;
- // export default HoistableDeclaration
- // export default ClassDeclaration
- // because the 'name' of a default-exported function is, confusingly, 'default'
- // see https://bocoup.com/blog/whats-in-a-function-name
- state.nameStack.set(state.tokens.next);
- advance("default");
- var def = state.tokens.curr;
- var exportType = state.tokens.next.id;
- if (exportType === "function") {
- this.block = true;
- advance("function");
- token = state.syntax["function"].fud(context);
- state.funct["(scope)"].setExported(token.name, def);
- } else if (exportType === "async" && peek().id === "function") {
- this.block = true;
- advance("async");
- advance("function");
- token = state.syntax["function"].fud(context | prodParams.preAsync);
- state.funct["(scope)"].setExported(token.name, def);
- } else if (exportType === "class") {
- this.block = true;
- advance("class");
- token = state.syntax["class"].fud(context);
- state.funct["(scope)"].setExported(token.name, def);
- } else {
- expression(context, 10);
- state.funct["(scope)"].setExported(null, def);
- }
- return this;
- }
- if (state.tokens.next.value === "{") {
- // ExportDeclaration :: export ExportClause
- advance("{");
- var exportedTokens = [];
- while (!checkPunctuator(state.tokens.next, "}")) {
- if (!state.tokens.next.identifier) {
- /* istanbul ignore next */
- error("E030", state.tokens.next, state.tokens.next.value);
- }
- advance();
- if (state.tokens.next.value === "as") {
- advance("as");
- if (!state.tokens.next.identifier) {
- /* istanbul ignore next */
- error("E030", state.tokens.next, state.tokens.next.value);
- }
- exportedTokens.push({
- local: state.tokens.prev,
- export: state.tokens.next
- });
- advance();
- } else {
- exportedTokens.push({
- local: state.tokens.curr,
- export: state.tokens.curr
- });
- }
- if (!checkPunctuator(state.tokens.next, "}")) {
- advance(",");
- }
- }
- advance("}");
- if (state.tokens.next.value === "from") {
- // ExportDeclaration :: export ExportClause FromClause
- advance("from");
- moduleSpecifier = state.tokens.next;
- advance("(string)");
- } else if (ok) {
- exportedTokens.forEach(function(x) {
- state.funct["(scope)"].setExported(x.local, x.export);
- });
- }
- if (exportedTokens.length === 0) {
- if (moduleSpecifier) {
- warning("W142", this, "export", moduleSpecifier.value);
- } else {
- warning("W141", this, "export");
- }
- }
- return this;
- } else if (state.tokens.next.id === "var") {
- // ExportDeclaration :: export VariableStatement
- advance("var");
- token = state.tokens.curr.fud(context);
- token.first.forEach(function(binding) {
- state.funct["(scope)"].setExported(binding, binding);
- });
- } else if (state.tokens.next.id === "let") {
- // ExportDeclaration :: export VariableStatement
- advance("let");
- token = state.tokens.curr.fud(context);
- token.first.forEach(function(binding) {
- state.funct["(scope)"].setExported(binding, binding);
- });
- } else if (state.tokens.next.id === "const") {
- // ExportDeclaration :: export VariableStatement
- advance("const");
- token = state.tokens.curr.fud(context);
- token.first.forEach(function(binding) {
- state.funct["(scope)"].setExported(binding, binding);
- });
- } else if (state.tokens.next.id === "function") {
- // ExportDeclaration :: export Declaration
- this.block = true;
- advance("function");
- token = state.syntax["function"].fud(context);
- state.funct["(scope)"].setExported(token.name, token.name);
- } else if (state.tokens.next.id === "async" && peek().id === "function") {
- // ExportDeclaration :: export Declaration
- this.block = true;
- advance("async");
- advance("function");
- token = state.syntax["function"].fud(context | prodParams.preAsync);
- state.funct["(scope)"].setExported(token.name, token.name);
- } else if (state.tokens.next.id === "class") {
- // ExportDeclaration :: export Declaration
- this.block = true;
- advance("class");
- token = state.syntax["class"].fud(context);
- state.funct["(scope)"].setExported(token.name, token.name);
- } else {
- /* istanbul ignore next */
- error("E024", state.tokens.next, state.tokens.next.value);
- }
- return this;
- }).exps = true;
- /**
- * Determine if SuperCall or SuperProperty may be used in the current context
- * (as described by the provided "functor" object).
- *
- * @param {string} type - one of "property" or "call"
- * @param {object} funct - a "functor" object describing the current function
- * context
- *
- * @returns {boolean}
- */
- function supportsSuper(type, funct) {
- if (type === "call" && funct["(async)"]) {
- return false;
- }
- if (type === "property" && funct["(method)"]) {
- return true;
- }
- if (type === "call" && funct["(statement)"] &&
- funct["(statement)"].id === "class") {
- return true;
- }
- if (funct["(arrow)"]) {
- return supportsSuper(type, funct["(context)"]);
- }
- return false;
- }
- var superNud = function() {
- var next = state.tokens.next;
- if (checkPunctuators(next, ["[", "."])) {
- if (!supportsSuper("property", state.funct)) {
- error("E063", this);
- }
- } else if (checkPunctuator(next, "(")) {
- if (!supportsSuper("call", state.funct)) {
- error("E064", this);
- }
- } else {
- error("E024", next, next.value || next.id);
- }
- return this;
- };
- // Future Reserved Words
- FutureReservedWord("abstract");
- FutureReservedWord("boolean");
- FutureReservedWord("byte");
- FutureReservedWord("char");
- FutureReservedWord("double");
- FutureReservedWord("enum", { es5: true });
- FutureReservedWord("export", { es5: true });
- FutureReservedWord("extends", { es5: true });
- FutureReservedWord("final");
- FutureReservedWord("float");
- FutureReservedWord("goto");
- FutureReservedWord("implements", { es5: true, strictOnly: true });
- FutureReservedWord("int");
- FutureReservedWord("interface", { es5: true, strictOnly: true });
- FutureReservedWord("long");
- FutureReservedWord("native");
- FutureReservedWord("package", { es5: true, strictOnly: true });
- FutureReservedWord("private", { es5: true, strictOnly: true });
- FutureReservedWord("protected", { es5: true, strictOnly: true });
- FutureReservedWord("public", { es5: true, strictOnly: true });
- FutureReservedWord("short");
- FutureReservedWord("static", { es5: true, strictOnly: true });
- FutureReservedWord("synchronized");
- FutureReservedWord("transient");
- FutureReservedWord("volatile");
- // this function is used to determine whether a squarebracket or a curlybracket
- // expression is a comprehension array, destructuring assignment or a json value.
- var lookupBlockType = function() {
- var pn, pn1, prev;
- var i = -1;
- var bracketStack = 0;
- var ret = {};
- if (checkPunctuators(state.tokens.curr, ["[", "{"])) {
- bracketStack += 1;
- }
- do {
- prev = i === -1 ? state.tokens.curr : pn;
- pn = i === -1 ? state.tokens.next : peek(i);
- pn1 = peek(i + 1);
- i = i + 1;
- if (checkPunctuators(pn, ["[", "{"])) {
- bracketStack += 1;
- } else if (checkPunctuators(pn, ["]", "}"])) {
- bracketStack -= 1;
- }
- if (bracketStack === 1 && pn.identifier && pn.value === "for" &&
- !checkPunctuator(prev, ".")) {
- ret.isCompArray = true;
- ret.notJson = true;
- break;
- }
- if (bracketStack === 0 && checkPunctuators(pn, ["}", "]"])) {
- if (pn1.value === "=") {
- ret.isDestAssign = true;
- ret.notJson = true;
- break;
- } else if (pn1.value === ".") {
- ret.notJson = true;
- break;
- }
- }
- if (checkPunctuator(pn, ";")) {
- ret.notJson = true;
- }
- } while (bracketStack > 0 && pn.id !== "(end)");
- return ret;
- };
- /**
- * Update an object used to track property names within object initializers
- * and class bodies. Produce warnings in response to duplicated names.
- *
- * @param {object} props - a collection of all properties of the object or
- * class to which the current property is being
- * assigned
- * @param {string} name - the property name
- * @param {object} tkn - the token defining the property
- * @param {boolean} [isClass] - whether the accessor is part of an ES6 Class
- * definition
- * @param {boolean} [isStatic] - whether the accessor is a static method
- * @param {boolean} [isComputed] - whether the property is a computed expression like [Symbol.iterator]
- */
- function saveProperty(props, name, tkn, isClass, isStatic, isComputed) {
- if (tkn.identifier) {
- name = tkn.value;
- }
- var key = name;
- if (isClass && isStatic) {
- key = "static " + name;
- }
- if (props[key] && name !== "__proto__" && !isComputed) {
- var msg = ["key", "class method", "static class method"];
- msg = msg[(isClass || false) + (isStatic || false)];
- warning("W075", state.tokens.next, msg, name);
- } else {
- props[key] = Object.create(null);
- }
- props[key].basic = true;
- props[key].basictkn = tkn;
- }
- /**
- * Update an object used to track property names within object initializers
- * and class bodies. Produce warnings in response to duplicated names.
- *
- * @param {string} accessorType - Either "get" or "set"
- * @param {object} props - a collection of all properties of the object or
- * class to which the current accessor is being
- * assigned
- * @param {object} tkn - the identifier token representing the accessor name
- * @param {boolean} [isClass] - whether the accessor is part of an ES6 Class
- * definition
- * @param {boolean} [isStatic] - whether the accessor is a static method
- */
- function saveAccessor(accessorType, props, name, tkn, isClass, isStatic) {
- var flagName = accessorType === "get" ? "getterToken" : "setterToken";
- var key = name;
- state.tokens.curr.accessorType = accessorType;
- state.nameStack.set(tkn);
- if (isClass && isStatic) {
- key = "static " + name;
- }
- if (props[key]) {
- if ((props[key].basic || props[key][flagName]) && name !== "__proto__") {
- var msg = "";
- if (isClass) {
- if (isStatic) {
- msg += "static ";
- }
- msg += accessorType + "ter method";
- } else {
- msg = "key";
- }
- warning("W075", state.tokens.next, msg, name);
- }
- } else {
- props[key] = Object.create(null);
- }
- props[key][flagName] = tkn;
- if (isStatic) {
- props[key].static = true;
- }
- }
- /**
- * Parse a computed property name within object initializers and class bodies
- * as introduced by ES2015. For example:
- *
- * void {
- * [object.method()]: null
- * };
- *
- * @param {number} context - the parsing context
- *
- * @returns {object} - the token value that describes the expression which
- * defines the property name
- */
- function computedPropertyName(context) {
- advance("[");
- // Explicitly reclassify token as a delimeter to prevent its later
- // interpretation as an "infix" operator.
- state.tokens.curr.delim = true;
- state.tokens.curr.lbp = 0;
- if (!state.inES6()) {
- warning("W119", state.tokens.curr, "computed property names", "6");
- }
- var value = expression(context & ~prodParams.noin, 10);
- advance("]");
- return value;
- }
- /**
- * Test whether a given token is a punctuator whose `value` property matches
- * one of the specified values. This function explicitly verifies the token's
- * `type` property so that like-valued string literals (e.g. `";"`) do not
- * produce false positives.
- *
- * @param {Token} token
- * @param {Array.<string>} values
- *
- * @returns {boolean}
- */
- function checkPunctuators(token, values) {
- if (token.type === "(punctuator)") {
- return _.includes(values, token.value);
- }
- return false;
- }
- /**
- * Test whether a given token is a punctuator whose `value` property matches
- * the specified value. This function explicitly verifies the token's `type`
- * property so that like-valued string literals (e.g. `";"`) do not produce
- * false positives.
- *
- * @param {Token} token
- * @param {string} value
- *
- * @returns {boolean}
- */
- function checkPunctuator(token, value) {
- return token.type === "(punctuator)" && token.value === value;
- }
- // Check whether this function has been reached for a destructuring assign with undeclared values
- function destructuringAssignOrJsonValue(context) {
- // lookup for the assignment (ECMAScript 6 only)
- // if it has semicolons, it is a block, so go parse it as a block
- // or it's not a block, but there are assignments, check for undeclared variables
- var block = lookupBlockType();
- if (block.notJson) {
- if (!state.inES6() && block.isDestAssign) {
- /* istanbul ignore next */
- warning("W104", state.tokens.curr, "destructuring assignment", "6");
- }
- statements(context);
- // otherwise parse json value
- } else {
- state.option.laxbreak = true;
- state.jsonMode = true;
- jsonValue();
- }
- }
- /**
- * Parse and define the three states of a list comprehension in order to
- * avoid defining global variables, but keeping them to the list
- * comprehension scope only. The order of the states are as follows:
- *
- * - "use" - which will be the returned iterative part of the list
- * comprehension
- * - "define" - which will define the variables local to the list
- * comprehension
- * - "filter" - which will help filter out values
- */
- var arrayComprehension = function() {
- var CompArray = function() {
- this.mode = "use";
- this.variables = [];
- };
- var _carrays = [];
- var _current;
- function declare(v) {
- var l = _current.variables.filter(function(elt) {
- // if it has, change its undef state
- if (elt.value === v) {
- elt.undef = false;
- return v;
- }
- }).length;
- return l !== 0;
- }
- function use(v) {
- var l = _current.variables.filter(function(elt) {
- // and if it has been defined
- if (elt.value === v && !elt.undef) {
- if (elt.unused === true) {
- elt.unused = false;
- }
- return v;
- }
- }).length;
- // otherwise we warn about it
- return (l === 0);
- }
- return { stack: function() {
- _current = new CompArray();
- _carrays.push(_current);
- },
- unstack: function() {
- _current.variables.filter(function(v) {
- if (v.unused)
- warning("W098", v.token, v.token.raw_text || v.value);
- if (v.undef)
- state.funct["(scope)"].block.use(v.value, v.token);
- });
- _carrays.splice(-1, 1);
- _current = _carrays[_carrays.length - 1];
- },
- setState: function(s) {
- if (_.includes(["use", "define", "generate", "filter"], s))
- _current.mode = s;
- },
- check: function(v) {
- if (!_current) {
- return;
- }
- // When we are in "use" state of the list comp, we enqueue that var
- if (_current && _current.mode === "use") {
- if (use(v)) {
- _current.variables.push({
- token: state.tokens.curr,
- value: v,
- undef: true,
- unused: false
- });
- }
- return true;
- // When we are in "define" state of the list comp,
- } else if (_current && _current.mode === "define") {
- // check if the variable has been used previously
- if (!declare(v)) {
- _current.variables.push({
- token: state.tokens.curr,
- value: v,
- undef: false,
- unused: true
- });
- }
- return true;
- // When we are in the "generate" state of the list comp,
- } else if (_current && _current.mode === "generate") {
- state.funct["(scope)"].block.use(v, state.tokens.curr);
- return true;
- // When we are in "filter" state,
- } else if (_current && _current.mode === "filter") {
- // we check whether current variable has been declared
- if (use(v)) {
- // if not we warn about it
- /* istanbul ignore next */
- state.funct["(scope)"].block.use(v, state.tokens.curr);
- }
- return true;
- }
- /* istanbul ignore next */
- return false;
- }
- };
- };
- /**
- * Parse input according to the JSON format.
- *
- * http://json.org/
- */
- function jsonValue() {
- function jsonObject() {
- var o = {}, t = state.tokens.next;
- advance("{");
- if (state.tokens.next.id !== "}") {
- for (;;) {
- if (state.tokens.next.id === "(end)") {
- error("E026", state.tokens.next, t.line);
- } else if (state.tokens.next.id === "}") {
- warning("W094", state.tokens.curr);
- break;
- } else if (state.tokens.next.id === ",") {
- error("E028", state.tokens.next);
- } else if (state.tokens.next.id !== "(string)") {
- warning("W095", state.tokens.next, state.tokens.next.value);
- }
- if (o[state.tokens.next.value] === true) {
- warning("W075", state.tokens.next, "key", state.tokens.next.value);
- } else if ((state.tokens.next.value === "__proto__" &&
- !state.option.proto) || (state.tokens.next.value === "__iterator__" &&
- !state.option.iterator)) {
- warning("W096", state.tokens.next, state.tokens.next.value);
- } else {
- o[state.tokens.next.value] = true;
- }
- advance();
- advance(":");
- jsonValue();
- if (state.tokens.next.id !== ",") {
- break;
- }
- advance(",");
- }
- }
- advance("}");
- }
- function jsonArray() {
- var t = state.tokens.next;
- advance("[");
- if (state.tokens.next.id !== "]") {
- for (;;) {
- if (state.tokens.next.id === "(end)") {
- error("E027", state.tokens.next, t.line);
- } else if (state.tokens.next.id === "]") {
- warning("W094", state.tokens.curr);
- break;
- } else if (state.tokens.next.id === ",") {
- error("E028", state.tokens.next);
- }
- jsonValue();
- if (state.tokens.next.id !== ",") {
- break;
- }
- advance(",");
- }
- }
- advance("]");
- }
- switch (state.tokens.next.id) {
- case "{":
- jsonObject();
- break;
- case "[":
- jsonArray();
- break;
- case "true":
- case "false":
- case "null":
- case "(number)":
- case "(string)":
- advance();
- break;
- case "-":
- advance("-");
- advance("(number)");
- break;
- default:
- error("E003", state.tokens.next);
- }
- }
- /**
- * Lint dynamically-evaluated code, appending any resulting errors/warnings
- * into the global `errors` array.
- *
- * @param {array} internals - collection of "internals" objects describing
- * string tokens that contain evaluated code
- * @param {object} options - linting options to apply
- * @param {object} globals - globally-defined bindings for the evaluated code
- */
- function lintEvalCode(internals, options, globals) {
- var priorErrorCount, idx, jdx, internal;
- for (idx = 0; idx < internals.length; idx += 1) {
- internal = internals[idx];
- options.scope = internal.elem;
- priorErrorCount = JSHINT.errors.length;
- itself(internal.code, options, globals);
- for (jdx = priorErrorCount; jdx < JSHINT.errors.length; jdx += 1) {
- JSHINT.errors[jdx].line += internal.token.line - 1;
- }
- }
- }
- var escapeRegex = function(str) {
- return str.replace(/[-\/\\^$*+?.()|[\]{}]/g, "\\$&");
- };
- // The actual JSHINT function itself.
- var itself = function(s, o, g) {
- var x, reIgnoreStr, reIgnore;
- var optionKeys, newOptionObj, newIgnoredObj;
- o = _.clone(o);
- state.reset();
- newOptionObj = state.option;
- newIgnoredObj = state.ignored;
- if (o && o.scope) {
- JSHINT.scope = o.scope;
- } else {
- JSHINT.errors = [];
- JSHINT.internals = [];
- JSHINT.blacklist = {};
- JSHINT.scope = "(main)";
- }
- predefined = Object.create(null);
- combine(predefined, vars.ecmaIdentifiers[3]);
- combine(predefined, vars.reservedVars);
- declared = Object.create(null);
- var exported = Object.create(null); // Variables that live outside the current file
- function each(obj, cb) {
- if (!obj)
- return;
- if (!Array.isArray(obj) && typeof obj === "object")
- obj = Object.keys(obj);
- obj.forEach(cb);
- }
- if (o) {
- each([o.predef, o.globals], function(dict) {
- each(dict, function(item) {
- var slice, prop;
- if (item[0] === "-") {
- slice = item.slice(1);
- JSHINT.blacklist[slice] = slice;
- // remove from predefined if there
- delete predefined[slice];
- } else {
- prop = Object.getOwnPropertyDescriptor(dict, item);
- predefined[item] = prop ? prop.value : false;
- }
- });
- });
- each(o.exported || null, function(item) {
- exported[item] = true;
- });
- delete o.predef;
- delete o.exported;
- optionKeys = Object.keys(o);
- for (x = 0; x < optionKeys.length; x++) {
- if (/^-W\d{3}$/g.test(optionKeys[x])) {
- newIgnoredObj[optionKeys[x].slice(1)] = true;
- } else {
- var optionKey = optionKeys[x];
- newOptionObj[optionKey] = o[optionKey];
- }
- }
- }
- state.option = newOptionObj;
- state.ignored = newIgnoredObj;
- state.option.indent = state.option.indent || 4;
- state.option.maxerr = state.option.maxerr || 50;
- indent = 1;
- var scopeManagerInst = scopeManager(state, predefined, exported, declared);
- scopeManagerInst.on("warning", function(ev) {
- warning.apply(null, [ ev.code, ev.token].concat(ev.data));
- });
- scopeManagerInst.on("error", function(ev) {
- /* istanbul ignore next */
- error.apply(null, [ ev.code, ev.token ].concat(ev.data));
- });
- state.funct = functor("(global)", null, {
- "(global)" : true,
- "(scope)" : scopeManagerInst,
- "(comparray)" : arrayComprehension(),
- "(metrics)" : createMetrics(state.tokens.next)
- });
- functions = [state.funct];
- member = {};
- membersOnly = null;
- inblock = false;
- lookahead = [];
- if (!isString(s) && !Array.isArray(s)) {
- errorAt("E004", 0);
- return false;
- }
- api = {
- get isJSON() {
- /* istanbul ignore next */
- return state.jsonMode;
- },
- getOption: function(name) {
- return state.option[name] || null;
- },
- getCache: function(name) {
- return state.cache[name];
- },
- setCache: function(name, value) {
- state.cache[name] = value;
- },
- warn: function(code, data) {
- warningAt.apply(null, [ code, data.line, data.char ].concat(data.data));
- },
- on: function(names, listener) {
- names.split(" ").forEach(function(name) {
- emitter.on(name, listener);
- }.bind(this));
- }
- };
- emitter.removeAllListeners();
- (extraModules || []).forEach(function(func) {
- func(api);
- });
- state.tokens.prev = state.tokens.curr = state.tokens.next = state.syntax["(begin)"];
- if (o && o.ignoreDelimiters) {
- if (!Array.isArray(o.ignoreDelimiters)) {
- /* istanbul ignore next */
- o.ignoreDelimiters = [o.ignoreDelimiters];
- }
- o.ignoreDelimiters.forEach(function(delimiterPair) {
- if (!delimiterPair.start || !delimiterPair.end)
- return;
- reIgnoreStr = escapeRegex(delimiterPair.start) +
- "[\\s\\S]*?" +
- escapeRegex(delimiterPair.end);
- reIgnore = new RegExp(reIgnoreStr, "ig");
- s = s.replace(reIgnore, function(match) {
- return match.replace(/./g, " ");
- });
- });
- }
- lex = new Lexer(s);
- lex.on("warning", function(ev) {
- warningAt.apply(null, [ ev.code, ev.line, ev.character].concat(ev.data));
- });
- lex.on("error", function(ev) {
- errorAt.apply(null, [ ev.code, ev.line, ev.character ].concat(ev.data));
- });
- lex.on("fatal", function(ev) {
- quit("E041", ev);
- });
- lex.on("Identifier", function(ev) {
- emitter.emit("Identifier", ev);
- });
- lex.on("String", function(ev) {
- emitter.emit("String", ev);
- });
- lex.on("Number", function(ev) {
- emitter.emit("Number", ev);
- });
- // Check options
- var name;
- for (name in o) {
- if (_.has(o, name)) {
- checkOption(name, true, state.tokens.curr);
- }
- }
- if (o) {
- for (name in o.unstable) {
- if (_.has(o.unstable, name)) {
- checkOption(name, false, state.tokens.curr);
- }
- }
- }
- try {
- applyOptions();
- // combine the passed globals after we've assumed all our options
- combine(predefined, g || {});
- //reset values
- checkComma.first = true;
- advance();
- switch (state.tokens.next.id) {
- case "{":
- case "[":
- destructuringAssignOrJsonValue(0);
- break;
- default:
- directives();
- if (state.directive["use strict"]) {
- if (!state.allowsGlobalUsd()) {
- warning("W097", state.directive["use strict"]);
- }
- }
- statements(0);
- }
- if (state.tokens.next.id !== "(end)") {
- quit("E041", state.tokens.curr);
- }
- state.funct["(scope)"].unstack();
- } catch (err) {
- if (err && err.name === "JSHintError") {
- var nt = state.tokens.next || {};
- JSHINT.errors.push({
- scope : "(main)",
- raw : err.raw,
- code : err.code,
- reason : err.reason,
- line : err.line || nt.line,
- character : err.character || nt.from
- });
- } else {
- /* istanbul ignore next */
- throw err;
- }
- }
- // Loop over the listed "internals", and check them as well.
- if (JSHINT.scope === "(main)") {
- lintEvalCode(JSHINT.internals, o || {}, g);
- }
- return JSHINT.errors.length === 0;
- };
- // Modules.
- itself.addModule = function(func) {
- extraModules.push(func);
- };
- itself.addModule(style.register);
- // Data summary.
- itself.data = function() {
- var data = {
- functions: [],
- options: state.option
- };
- var fu, f, i, n, globals;
- if (itself.errors.length) {
- data.errors = itself.errors;
- }
- if (state.jsonMode) {
- /* istanbul ignore next */
- data.json = true;
- }
- var impliedGlobals = state.funct["(scope)"].getImpliedGlobals();
- if (impliedGlobals.length > 0) {
- data.implieds = impliedGlobals;
- }
- globals = state.funct["(scope)"].getUsedOrDefinedGlobals();
- if (globals.length > 0) {
- data.globals = globals;
- }
- for (i = 1; i < functions.length; i += 1) {
- f = functions[i];
- fu = {};
- fu.name = f["(name)"];
- fu.param = f["(params)"];
- fu.line = f["(line)"];
- fu.character = f["(character)"];
- fu.last = f["(last)"];
- fu.lastcharacter = f["(lastcharacter)"];
- fu.metrics = {
- complexity: f["(metrics)"].ComplexityCount,
- parameters: f["(metrics)"].arity,
- statements: f["(metrics)"].statementCount
- };
- data.functions.push(fu);
- }
- var unuseds = state.funct["(scope)"].getUnuseds();
- if (unuseds.length > 0) {
- data.unused = unuseds;
- }
- for (n in member) {
- if (typeof member[n] === "number") {
- data.member = member;
- break;
- }
- }
- return data;
- };
- itself.jshint = itself;
- return itself;
- }());
- // Make JSHINT a Node module, if possible.
- if (typeof exports === "object" && exports) {
- exports.JSHINT = JSHINT;
- }
- },{"./lex.js":17,"./messages.js":18,"./options.js":20,"./prod-params.js":21,"./reg.js":22,"./scope-manager.js":23,"./state.js":24,"./style.js":25,"./vars.js":27,"console-browserify":9,"events":11,"lodash":12}]},{},[]);
- JSHINT = require('jshint').JSHINT;
- if (typeof exports === 'object' && exports) exports.JSHINT = JSHINT;
- }());
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