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<head><title>MutableHashTable -- the class of all mutable hash tables</title>
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<div><a href="index.html" title="">Macaulay2Doc</a> > <a href="___The_sp__Macaulay2_splanguage.html" title="">The Macaulay2 language</a> > <a href="_hash_sptables.html" title="">hash tables</a> > <a href="___Mutable__Hash__Table.html" title="the class of all mutable hash tables">MutableHashTable</a></div>
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<div><h1>MutableHashTable -- the class of all mutable hash tables</h1>
<div class="single"><h2>Description</h2>
<div><p/>
A mutable hash table is a type of hash table whose entries can be changed.<p/>
Normally the entries in a mutable hash table are not printed, to prevent infinite loops in the printing routines. To print them out, use <a href="_peek.html" title="examine contents of an object">peek</a>.<table class="examples"><tr><td><pre>i1 : x = new MutableHashTable
o1 = MutableHashTable{}
o1 : MutableHashTable</pre>
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<tr><td><pre>i2 : scan(0 .. 30, i -> x#i = i^2)</pre>
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<tr><td><pre>i3 : x # 20
o3 = 400</pre>
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<tr><td><pre>i4 : x #? 40
o4 = false</pre>
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<div class="single"><h2>See also</h2>
<ul><li><span><a href="___Hash__Table.html" title="the class of all hash tables">HashTable</a> -- the class of all hash tables</span></li>
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<div class="waystouse"><h2>Types of mutable hash table :</h2>
<ul><li><span><a href="___Cache__Table.html" title="hash tables for caching">CacheTable</a> -- hash tables for caching</span></li>
<li><span><a href="___Descent.html" title="">Descent</a></span></li>
<li><span><a href="___Graded__Module.html" title="the class of all graded modules">GradedModule</a> -- the class of all graded modules</span></li>
<li><span><a href="___Graded__Module__Map.html" title="the class of all maps between graded modules">GradedModuleMap</a> -- the class of all maps between graded modules</span></li>
<li><span><a href="___Groebner__Basis.html" title="the class of all Gröbner bases">GroebnerBasis</a> -- the class of all Gröbner bases</span></li>
<li><span><a href="___Indexed__Variable__Table.html" title="">IndexedVariableTable</a></span></li>
<li><span><a href="___Package.html" title="the class of all packages">Package</a> -- the class of all packages</span></li>
<li><span><a href="___Resolution.html" title="the class of all resolution computations">Resolution</a> -- the class of all resolution computations</span></li>
<li><span><a href="___Scripted__Functor.html" title="the class of all scripted functors">ScriptedFunctor</a> -- the class of all scripted functors</span></li>
<li><span><a href="___Type.html" title="the class of all types">Type</a> -- the class of all types</span></li>
<li><span><a href="___Variety.html" title="the class of all algebraic varieties">Variety</a> -- the class of all algebraic varieties</span></li>
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<h2>Fixed objects of class MutableHashTable :</h2>
<ul><li><span><a href="_file__Dictionaries.html" title="local dictionaries for loaded files">fileDictionaries</a> -- local dictionaries for loaded files</span></li>
<li><span><a href="_global__Assignment__Hooks.html" title="assignment hooks for global symbols">globalAssignmentHooks</a> -- assignment hooks for global symbols</span></li>
<li><span><a href="_loaded__Files.html" title="">loadedFiles</a></span></li>
<li><span><a href="_nullary__Methods.html" title="">nullaryMethods</a></span></li>
<li><span><a href="_typical__Values.html" title="types of values returned by functions">typicalValues</a> -- types of values returned by functions</span></li>
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<div class="waystouse"><h2>For the programmer</h2>
<p>The object <a href="___Mutable__Hash__Table.html" title="the class of all mutable hash tables">MutableHashTable</a> is <span>a <a href="___Type.html">type</a></span>, with ancestor classes <a href="___Hash__Table.html" title="the class of all hash tables">HashTable</a> < <a href="___Thing.html" title="the class of all things">Thing</a>.</p>
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