about summary refs log tree commit diff stats
path: root/html/factorial.mu.html
blob: e6dcac673b9b7d4673a26fc3dcfb0ca95446f76d (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<title>Mu - factorial.mu</title>
<meta name="Generator" content="Vim/8.0">
<meta name="plugin-version" content="vim7.4_v2">
<meta name="syntax" content="none">
<meta name="settings" content="number_lines,use_css,pre_wrap,no_foldcolumn,expand_tabs,line_ids,prevent_copy=">
<meta name="colorscheme" content="minimal-light">
<style type="text/css">
<!--
pre { white-space: pre-wrap; font-family: monospace; color: #000000; background-color: #c6c6c6; }
body { font-size:12pt; font-family: monospace; color: #000000; background-color: #c6c6c6; }
a { color:inherit; }
* { font-size:12pt; font-size: 1em; }
.muControl { color: #804000; }
.muRecipe { color: #ff8700; }
.muScenario { color: #00af00; }
.LineNr { }
.Delimiter { color: #c000c0; }
.Constant { color: #008787; }
.Special { color: #ff6060; }
.Comment { color: #005faf; }
-->
</style>

<script type='text/javascript'>
<!--

/* function to open any folds containing a jumped-to line before jumping to it */
function JumpToLine()
{
  var lineNum;
  lineNum = window.location.hash;
  lineNum = lineNum.substr(1); /* strip off '#' */

  if (lineNum.indexOf('L') == -1) {
    lineNum = 'L'+lineNum;
  }
  lineElem = document.getElementById(lineNum);
  /* Always jump to new location even if the line was hidden inside a fold, or
   * we corrected the raw number to a line ID.
   */
  if (lineElem) {
    lineElem.scrollIntoView(true);
  }
  return true;
}
if ('onhashchange' in window) {
  window.onhashchange = JumpToLine;
}

-->
</script>
</head>
<body onload='JumpToLine();'>
<a href='https://github.com/akkartik/mu/blob/master/factorial.mu'>https://github.com/akkartik/mu/blob/master/factorial.mu</a>
<pre id='vimCodeElement'>
<span id="L1" class="LineNr"> 1 </span><span class="Comment"># example program: compute the factorial of 5</span>
<span id="L2" class="LineNr"> 2 </span>
<span id="L3" class="LineNr"> 3 </span><span class="muRecipe">def</span> <a href='factorial.mu.html#L3'>main</a> [
<span id="L4" class="LineNr"> 4 </span>  <span class="Constant">local-scope</span>
<span id="L5" class="LineNr"> 5 </span>  x:num <span class="Special">&lt;-</span> <a href='factorial.mu.html#L10'>factorial</a><span class="Constant"> 5</span>
<span id="L6" class="LineNr"> 6 </span>  $print <span class="Constant">[result: ]</span>, x, <span class="Constant">[ </span>
<span id="L7" class="LineNr"> 7 </span><span class="Constant">]</span>
<span id="L8" class="LineNr"> 8 </span>]
<span id="L9" class="LineNr"> 9 </span>
<span id="L10" class="LineNr">10 </span><span class="muRecipe">def</span> <a href='factorial.mu.html#L10'>factorial</a> n:num<span class="muRecipe"> -&gt; </span>result:num [
<span id="L11" class="LineNr">11 </span>  <span class="Constant">local-scope</span>
<span id="L12" class="LineNr">12 </span>  <span class="Constant">load-inputs</span>
<span id="L13" class="LineNr">13 </span>  <span class="Delimiter">{</span>
<span id="L14" class="LineNr">14 </span>    <span class="Comment"># if n=0 return 1</span>
<span id="L15" class="LineNr">15 </span>    zero?:bool <span class="Special">&lt;-</span> equal n,<span class="Constant"> 0</span>
<span id="L16" class="LineNr">16 </span>    <span class="muControl">break-unless</span> zero?
<span id="L17" class="LineNr">17 </span>   <span class="muControl"> return</span><span class="Constant"> 1</span>
<span id="L18" class="LineNr">18 </span>  <span class="Delimiter">}</span>
<span id="L19" class="LineNr">19 </span>  <span class="Comment"># return n * factorial(n-1)</span>
<span id="L20" class="LineNr">20 </span>  x:num <span class="Special">&lt;-</span> subtract n,<span class="Constant"> 1</span>
<span id="L21" class="LineNr">21 </span>  subresult:num <span class="Special">&lt;-</span> <a href='factorial.mu.html#L10'>factorial</a> x
<span id="L22" class="LineNr">22 </span>  result <span class="Special">&lt;-</span> multiply subresult, n
<span id="L23" class="LineNr">23 </span>]
<span id="L24" class="LineNr">24 </span>
<span id="L25" class="LineNr">25 </span><span class="Comment"># unit test</span>
<span id="L26" class="LineNr">26 </span><span class="muScenario">scenario</span> factorial-test [
<span id="L27" class="LineNr">27 </span>  run [
<span id="L28" class="LineNr">28 </span>    1:num <span class="Special">&lt;-</span> <a href='factorial.mu.html#L10'>factorial</a><span class="Constant"> 5</span>
<span id="L29" class="LineNr">29 </span>  ]
<span id="L30" class="LineNr">30 </span>  memory-should-contain [
<span id="L31" class="LineNr">31 </span>   <span class="Constant"> 1</span> <span class="Special">&lt;-</span><span class="Constant"> 120</span>
<span id="L32" class="LineNr">32 </span>  ]
<span id="L33" class="LineNr">33 </span>]
</pre>
</body>
</html>
<!-- vim: set foldmethod=manual : -->