Import Upstream version 20180207
[hcoop/debian/mlton.git] / doc / guide / localhost / MLtonArray
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26<h1>MLtonArray</h1>\r
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32<div class="content"><div class="highlight"><pre><span class="k">signature</span><span class="w"> </span><span class="n">MLTON_ARRAY</span><span class="w"> </span><span class="p">=</span><span class="w"></span>\r
33<span class="w"> </span><span class="k">sig</span><span class="w"></span>\r
34<span class="w"> </span><span class="k">val</span><span class="w"> </span><span class="n">unfoldi</span><span class="p">:</span><span class="w"> </span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="p">(</span><span class="n">int</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="p">)</span><span class="w"> </span><span class="p">-&gt;</span><span class="w"> </span><span class="n">&#39;a</span><span class="w"> </span><span class="n">array</span><span class="w"> </span><span class="n">*</span><span class="w"> </span><span class="n">&#39;b</span><span class="w"></span>\r
35<span class="w"> </span><span class="k">end</span><span class="w"></span>\r
36</pre></div></div></div>\r
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38<li>\r
39<p>\r
40<span class="monospaced">unfoldi (n, b, f)</span>\r
41</p>\r
42<div class="paragraph"><p>constructs an array <em>a</em> of length <span class="monospaced">n</span>, whose elements <em>a<sub>i</sub></em> are\r
43determined by the equations <em>b<sub>0</sub> = b</em> and\r
44<em>(a<sub>i</sub>, b<sub>i+1</sub>) = f (i, b<sub>i</sub>)</em>.</p></div>\r
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