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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Class Poco::HashSet</title>
<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
<meta name="author" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="publisher" content="Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="copyright" content="Copyright (c) 2009, Applied Informatics Software Engineering GmbH and Contributors"/>
<meta name="language" content="en"/>
<meta name="date" content="2009-11-24"/>
<meta name="generator" content="PocoDoc"/>
<link rel="stylesheet" href="css/styles.css" type="text/css"/>
</head>
<body bgcolor="#ffffff" leftmargin="0" topmargin="0">
<div class="header">
<h1 class="namespace"><a href="Poco.html" class="namespace">Poco</a></h1>
<h1 class="template">template &lt; class Value, class HashFunc = Hash &lt; Value &gt; &gt;</h1>
<h1 class="symbol">class HashSet</h1>
</div>
<div class="body">
<p>
<b>Library:</b> Foundation<br />
<b>Package:</b> Hashing<br />
<b>Header:</b> Poco/HashSet.h</p>
<h2>Description</h2>
<div class="description">
<p>This class implements a set using a <a href="Poco.LinearHashTable.html" title="class Poco::LinearHashTable">LinearHashTable</a>. </p>
<p>A <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> can be used just like a std::set. </p>
</div>
<h2>Member Summary</h2>
<p><b>Member Functions: </b><a href="Poco.HashSet.html#7412" title="Poco::HashSet::begin()">begin</a>, <a href="Poco.HashSet.html#7428" title="Poco::HashSet::clear()">clear</a>, <a href="Poco.HashSet.html#7420" title="Poco::HashSet::count()">count</a>, <a href="Poco.HashSet.html#7430" title="Poco::HashSet::empty()">empty</a>, <a href="Poco.HashSet.html#7413" title="Poco::HashSet::end()">end</a>, <a href="Poco.HashSet.html#7424" title="Poco::HashSet::erase()">erase</a>, <a href="Poco.HashSet.html#7416" title="Poco::HashSet::find()">find</a>, <a href="Poco.HashSet.html#7422" title="Poco::HashSet::insert()">insert</a>, <a href="Poco.HashSet.html#7408" title="Poco::HashSet::operator =()">operator&nbsp;=</a>, <a href="Poco.HashSet.html#7429" title="Poco::HashSet::size()">size</a>, <a href="Poco.HashSet.html#7410" title="Poco::HashSet::swap()">swap</a></p>
<h2>Types</h2>
<h3><a name="7401">ConstIterator</a></h3>
<p class="decl">typedef typename <a href="Poco.HashTable.html#7456" title="Poco::HashTable::ConstIterator">HashTable::ConstIterator</a> <a href="Poco.HashSet.html#7401" title="Poco::HashSet::ConstIterator">ConstIterator</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7397">ConstPointer</a></h3>
<p class="decl">typedef const Value * <a href="Poco.HashSet.html#7397" title="Poco::HashSet::ConstPointer">ConstPointer</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7395">ConstReference</a></h3>
<p class="decl">typedef const Value &amp; <a href="Poco.HashSet.html#7395" title="Poco::HashSet::ConstReference">ConstReference</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7398">Hash</a></h3>
<p class="decl">typedef HashFunc <a href="Poco.HashSet.html#7398" title="Poco::HashSet::Hash">Hash</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7399">HashTable</a></h3>
<p class="decl">typedef <a href="Poco.LinearHashTable.html" title="class Poco::LinearHashTable">LinearHashTable</a> &lt; <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a>, <a href="Poco.HashSet.html#7398" title="Poco::HashSet::Hash">Hash</a> &gt; <a href="Poco.HashSet.html#7399" title="Poco::HashSet::HashTable">HashTable</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7400">Iterator</a></h3>
<p class="decl">typedef typename <a href="Poco.HashTable.html#7457" title="Poco::HashTable::Iterator">HashTable::Iterator</a> <a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7396">Pointer</a></h3>
<p class="decl">typedef Value * <a href="Poco.HashSet.html#7396" title="Poco::HashSet::Pointer">Pointer</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7394">Reference</a></h3>
<p class="decl">typedef Value &amp; <a href="Poco.HashSet.html#7394" title="Poco::HashSet::Reference">Reference</a>;</p>
<div class="description">
<p></p>
</div>
<h3><a name="7393">ValueType</a></h3>
<p class="decl">typedef Value <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a>;</p>
<div class="description">
<p></p>
</div>
<h2>Constructors</h2>
<h3><a name="7402">HashSet</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>();</p>
<div class="description">
<p>Creates an empty <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>. </p>
</div>
<h3><a name="7403">HashSet</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>(<br />&nbsp;&nbsp;&nbsp;&nbsp;std::size_t initialReserve<br />);</p>
<div class="description">
<p>Creates the <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>, using the given initialReserve. </p>
</div>
<h3><a name="7405">HashSet</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> &amp; set<br />);</p>
<div class="description">
<p>Creates the <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> by copying another one. </p>
</div>
<h2>Destructor</h2>
<h3><a name="7407">~HashSet</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">~<a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>();</p>
<div class="description">
<p>Destroys the <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>. </p>
</div>
<h2>Member Functions</h2>
<h3><a name="7412">begin</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7401" title="Poco::HashSet::ConstIterator">ConstIterator</a> begin() const;</p>
<div class="description">
<p>Returns an iterator pointing to the first entry, if one exists. </p>
</div>
<h3><a name="7414">begin</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a> begin();</p>
<div class="description">
<p>Returns an iterator pointing to the first entry, if one exists. </p>
</div>
<h3><a name="7428">clear</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void clear();</p>
<div class="description">
<p>Erases all elements. </p>
</div>
<h3><a name="7420">count</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">std::size_t count(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a> &amp; value<br />) const;</p>
<div class="description">
<p>Returns the number of elements with the given value, with is either 1 or 0. </p>
</div>
<h3><a name="7430">empty</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">bool empty() const;</p>
<div class="description">
<p>Returns true if and only if the table is empty. </p>
</div>
<h3><a name="7413">end</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7401" title="Poco::HashSet::ConstIterator">ConstIterator</a> end() const;</p>
<div class="description">
<p>Returns an iterator pointing to the end of the table. </p>
</div>
<h3><a name="7415">end</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a> end();</p>
<div class="description">
<p>Returns an iterator pointing to the end of the table. </p>
</div>
<h3><a name="7424">erase</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void erase(<br />&nbsp;&nbsp;&nbsp;&nbsp;<a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a> it<br />);</p>
<div class="description">
<p>Erases the element pointed to by it. </p>
</div>
<h3><a name="7426">erase</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void erase(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a> &amp; value<br />);</p>
<div class="description">
<p>Erases the element with the given value, if it exists. </p>
</div>
<h3><a name="7416">find</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7401" title="Poco::HashSet::ConstIterator">ConstIterator</a> find(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a> &amp; value<br />) const;</p>
<div class="description">
<p>Finds an entry in the table. </p>
</div>
<h3><a name="7418">find</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a> find(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a> &amp; value<br />);</p>
<div class="description">
<p>Finds an entry in the table. </p>
</div>
<h3><a name="7422">insert</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">std::pair &lt; <a href="Poco.HashSet.html#7400" title="Poco::HashSet::Iterator">Iterator</a>, bool &gt; insert(<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html#7393" title="Poco::HashSet::ValueType">ValueType</a> &amp; value<br />);</p>
<div class="description">
<p>Inserts an element into the set. </p>
<p>If the element already exists in the set, a pair(iterator, false) with iterator pointing to the  existing element is returned. Otherwise, the element is inserted an a  pair(iterator, true) with iterator pointing to the new element is returned. </p>
</div>
<h3><a name="7408">operator =</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl"><a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> &amp; operator = (<br />&nbsp;&nbsp;&nbsp;&nbsp;const <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> &amp; table<br />);</p>
<div class="description">
<p>Assigns another <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a>. </p>
</div>
<h3><a name="7429">size</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">std::size_t size() const;</p>
<div class="description">
<p>Returns the number of elements in the table. </p>
</div>
<h3><a name="7410">swap</a> <img src="images/inline.gif" alt="inline" title="inline" style="vertical-align:baseline;" border="0" /> </h3>
<p class="decl">void swap(<br />&nbsp;&nbsp;&nbsp;&nbsp;<a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> &amp; set<br />);</p>
<div class="description">
<p>Swaps the <a href="Poco.HashSet.html" title="class Poco::HashSet">HashSet</a> with another one. </p>
</div>
<p class="footer">POCO C++ Libraries 1.3.6-all<br />
Copyright &copy; 2009, <a href="http://pocoproject.org/" target="_blank">Applied Informatics Software Engineering GmbH and Contributors</a></p>

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