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<div class="ChapSects"><a href="chap22.html#X85B21D56816A1B39">22. <span class="Heading"> Parallel Computation - Extra Functions</span></a>
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<h3>22. <span class="Heading"> Parallel Computation - Extra Functions</span></h3>
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<td class="tdleft"><code class="code">ChildFunction("function(arg);",s)</code></p>
<p>This runs the GAP function "function(arg);" on a child process accessed by the stream s. The output from "func;" can be accessed via the stream.</td>
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<td class="tdleft"><code class="code">ChildRead(s)</code></p>
<p>This returns, as a string, the output of the last application of ChildFunction("function(arg);",s).</td>
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<td class="tdleft"><code class="code">ChildReadEval(s)</code></p>
<p>This returns, as an evaluated string, the output of the last application of ChildFunction("function(arg);",s).</td>
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<td class="tdleft"><code class="code">ParallelList(I,fn,L)</code></p>
<p>Inputs a list I, a function fn such that fn(x) is defined for all x in I, and a list of children L. It uses the children in L to compute List(I,x->fn(x)). (Obviously the function fn must be defined on all child processes in L.)</td>
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