txlyre
/
avram


			
							123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102
							<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December 10, 2012 by texi2html 1.82
texi2html was written by: 
            Lionel Cons <[email protected]> (original author)
            Karl Berry  <[email protected]>
            Olaf Bachmann <[email protected]>
            and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <[email protected]>
-->
<head>
<title>avram - a virtual machine code interpreter: 2.7.13.1 Map</title>

<meta name="description" content="avram - a virtual machine code interpreter: 2.7.13.1 Map">
<meta name="keywords" content="avram - a virtual machine code interpreter: 2.7.13.1 Map">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.82">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">

<a name="Map"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="List-Combinators.html#List-Combinators" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="Filter.html#Filter" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="Virtual-Machine-Specification.html#Virtual-Machine-Specification" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="List-Combinators.html#List-Combinators" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Library-Reference.html#Library-Reference" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="avram.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="avram_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Function-Index.html#Function-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="avram_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<hr size="1">
<a name="Map-1"></a>
<h4 class="subsubsection">2.7.13.1 Map</h4>

<p>A virtual code application in the following form causes a function with
non-<code>nil</code> virtual code <code><var>f</var></code> to be applied to every item
in a list.
</p>
<dl compact="compact">
<dt> <em>T22</em></dt>
<dd><p>[[<code>map</code>]] <code><var>f</var></code> = <code>((nil,nil),((nil,<var>f</var>),nil))</code>
</p></dd>
</dl>

<a name="index-map"></a>
<p>The <code>map</code> mnemonic is used in <code>silly</code> to express applications
in this form as <code>map <var>f</var></code>.  This operation is also well known to
lisp users and functional programmers.  The semantics is determined by
these two operator properties (for non-<code>nil</code> <code><var>f</var></code>).
</p>
<dl compact="compact">
<dt> <em>P24</em></dt>
<dd><p>([[<code>map</code>]] <code><var>f</var></code>) <code>nil</code> = <code>nil</code>
</p></dd>
<dt> <em>P25</em></dt>
<dd><p>([[<code>map</code>]] <code><var>f</var></code>) <code>(<var>x</var>,<var>y</var>)</code> = <code>(<var>f</var> <var>x</var>,(</code>[[<code>map</code>]] <code><var>f</var>) <var>y</var>)</code>
</p></dd>
</dl>

<p>Note that the representation of lists described in 
<a href="Representation-of-Numeric-and-Textual-Data.html#Representation-of-Numeric-and-Textual-Data">Representation of Numeric and Textual Data</a>, is assumed.
</p>
<hr size="1">
<p>
 <font size="-1">
  This document was generated on <i>December 10, 2012</i> using <a href="http://www.nongnu.org/texi2html/"><i>texi2html 1.82</i></a>.
 </font>
 <br>

</p>
</body>
</html>