Map.html 4.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102
  1. <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
  2. <html>
  3. <!-- Created on December 10, 2012 by texi2html 1.82
  4. texi2html was written by:
  5. Lionel Cons <[email protected]> (original author)
  6. Karl Berry <[email protected]>
  7. Olaf Bachmann <[email protected]>
  8. and many others.
  9. Maintained by: Many creative people.
  10. Send bugs and suggestions to <[email protected]>
  11. -->
  12. <head>
  13. <title>avram - a virtual machine code interpreter: 2.7.13.1 Map</title>
  14. <meta name="description" content="avram - a virtual machine code interpreter: 2.7.13.1 Map">
  15. <meta name="keywords" content="avram - a virtual machine code interpreter: 2.7.13.1 Map">
  16. <meta name="resource-type" content="document">
  17. <meta name="distribution" content="global">
  18. <meta name="Generator" content="texi2html 1.82">
  19. <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
  20. <style type="text/css">
  21. <!--
  22. a.summary-letter {text-decoration: none}
  23. blockquote.smallquotation {font-size: smaller}
  24. pre.display {font-family: serif}
  25. pre.format {font-family: serif}
  26. pre.menu-comment {font-family: serif}
  27. pre.menu-preformatted {font-family: serif}
  28. pre.smalldisplay {font-family: serif; font-size: smaller}
  29. pre.smallexample {font-size: smaller}
  30. pre.smallformat {font-family: serif; font-size: smaller}
  31. pre.smalllisp {font-size: smaller}
  32. span.roman {font-family:serif; font-weight:normal;}
  33. span.sansserif {font-family:sans-serif; font-weight:normal;}
  34. ul.toc {list-style: none}
  35. -->
  36. </style>
  37. </head>
  38. <body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">
  39. <a name="Map"></a>
  40. <table cellpadding="1" cellspacing="1" border="0">
  41. <tr><td valign="middle" align="left">[<a href="List-Combinators.html#List-Combinators" title="Previous section in reading order"> &lt; </a>]</td>
  42. <td valign="middle" align="left">[<a href="Filter.html#Filter" title="Next section in reading order"> &gt; </a>]</td>
  43. <td valign="middle" align="left"> &nbsp; </td>
  44. <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>
  45. <td valign="middle" align="left">[<a href="List-Combinators.html#List-Combinators" title="Up section"> Up </a>]</td>
  46. <td valign="middle" align="left">[<a href="Library-Reference.html#Library-Reference" title="Next chapter"> &gt;&gt; </a>]</td>
  47. <td valign="middle" align="left"> &nbsp; </td>
  48. <td valign="middle" align="left"> &nbsp; </td>
  49. <td valign="middle" align="left"> &nbsp; </td>
  50. <td valign="middle" align="left"> &nbsp; </td>
  51. <td valign="middle" align="left">[<a href="avram.html#Top" title="Cover (top) of document">Top</a>]</td>
  52. <td valign="middle" align="left">[<a href="avram_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
  53. <td valign="middle" align="left">[<a href="Function-Index.html#Function-Index" title="Index">Index</a>]</td>
  54. <td valign="middle" align="left">[<a href="avram_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
  55. </tr></table>
  56. <hr size="1">
  57. <a name="Map-1"></a>
  58. <h4 class="subsubsection">2.7.13.1 Map</h4>
  59. <p>A virtual code application in the following form causes a function with
  60. non-<code>nil</code> virtual code <code><var>f</var></code> to be applied to every item
  61. in a list.
  62. </p>
  63. <dl compact="compact">
  64. <dt> <em>T22</em></dt>
  65. <dd><p>[[<code>map</code>]] <code><var>f</var></code> = <code>((nil,nil),((nil,<var>f</var>),nil))</code>
  66. </p></dd>
  67. </dl>
  68. <a name="index-map"></a>
  69. <p>The <code>map</code> mnemonic is used in <code>silly</code> to express applications
  70. in this form as <code>map <var>f</var></code>. This operation is also well known to
  71. lisp users and functional programmers. The semantics is determined by
  72. these two operator properties (for non-<code>nil</code> <code><var>f</var></code>).
  73. </p>
  74. <dl compact="compact">
  75. <dt> <em>P24</em></dt>
  76. <dd><p>([[<code>map</code>]] <code><var>f</var></code>) <code>nil</code> = <code>nil</code>
  77. </p></dd>
  78. <dt> <em>P25</em></dt>
  79. <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>
  80. </p></dd>
  81. </dl>
  82. <p>Note that the representation of lists described in
  83. <a href="Representation-of-Numeric-and-Textual-Data.html#Representation-of-Numeric-and-Textual-Data">Representation of Numeric and Textual Data</a>, is assumed.
  84. </p>
  85. <hr size="1">
  86. <p>
  87. <font size="-1">
  88. This document was generated on <i>December 10, 2012</i> using <a href="http://www.nongnu.org/texi2html/"><i>texi2html 1.82</i></a>.
  89. </font>
  90. <br>
  91. </p>
  92. </body>
  93. </html>