<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
lang="en" dir="ltr">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>
unique_copy [C++ Reference]
</title>
<meta name="generator" content="DokuWiki Release 2009-12-25c "Lemming"" />
<meta name="robots" content="index,follow" />
<meta name="date" content="2009-10-09T01:15:32-0700" />
<meta name="keywords" content="stl,algorithm,unique_copy" />
<link rel="search" type="application/opensearchdescription+xml" href="/wiki/lib/exe/opensearch.php" title="C++ Reference" />
<link rel="start" href="/wiki/" />
<link rel="contents" href="/wiki/stl/algorithm/unique_copy?do=index" title="Index" />
<link rel="alternate" type="application/rss+xml" title="Recent Changes" href="/wiki/feed.php" />
<link rel="alternate" type="application/rss+xml" title="Current Namespace" href="/wiki/feed.php?mode=list&ns=stl:algorithm" />
<link rel="edit" title="Edit this page" href="/wiki/stl/algorithm/unique_copy?do=edit" />
<link rel="alternate" type="text/html" title="Plain HTML" href="/wiki/_export/xhtml/stl/algorithm/unique_copy" />
<link rel="alternate" type="text/plain" title="Wiki Markup" href="/wiki/_export/raw/stl/algorithm/unique_copy" />
<link rel="stylesheet" media="all" type="text/css" href="/wiki/lib/exe/css.php?s=all&t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="screen" type="text/css" href="/wiki/lib/exe/css.php?t=custom1&tseed=1272971091" />
<link rel="stylesheet" media="print" type="text/css" href="/wiki/lib/exe/css.php?s=print&t=custom1&tseed=1272971091" />
<script type="text/javascript" charset="utf-8" ><!--//--><![CDATA[//><!--
var NS='stl:algorithm';var JSINFO = {"id":"stl:algorithm:unique_copy","namespace":"stl:algorithm"};
//--><!]]></script>
<script type="text/javascript" charset="utf-8" src="/wiki/lib/exe/js.php?tseed=1272971091" ></script>
<link rel="shortcut icon" href="/wiki/lib/tpl/custom1/images/favicon.png" />
</head>
<body>
<div class="dokuwiki">
<div class="stylehead">
<div class="header">
<div class="pagename">
[[<a href="../../stl/algorithm/unique_copy.html" title="Backlinks">unique_copy</a>]]
</div>
<div class="logo">
<div class="clearer"></div>
</div>
<div class="breadcrumbs">
<span class="bchead">You are here: </span><a href="../../start.html" title="start">C++ Reference</a> » <a href="../../stl/start.html" title="stl:start">C++ Standard Template Library</a> » <a href="../../stl/algorithm/start.html" title="stl:algorithm:start">C++ Algorithms</a> » <a href="../../stl/algorithm/unique_copy.html" title="stl:algorithm:unique_copy">unique_copy</a> </div>
</div>
<div class="plugin_translation"><span>Translations of this page<sup><a href="../../localization.html" class="wikilink1" title="localization">?</a></sup>:</span> <ul> <li><div class="li"><span class="curid"><a href="../../stl/algorithm/unique_copy.html" class="wikilink1" title="stl:algorithm:unique_copy">en</a></span></div></li> <li><div class="li"><a href="../../br-pt/stl/algorithm/unique_copy.html" class="wikilink2" title="br-pt:stl:algorithm:unique_copy" rel="nofollow">br-pt</a></div></li> <li><div class="li"><a href="../../cn/stl/algorithm/unique_copy.html" class="wikilink2" title="cn:stl:algorithm:unique_copy" rel="nofollow">cn</a></div></li> <li><div class="li"><a href="../../cz/stl/algorithm/unique_copy.html" class="wikilink2" title="cz:stl:algorithm:unique_copy" rel="nofollow">cz</a></div></li> <li><div class="li"><a href="../../de/stl/algorithm/unique_copy.html" class="wikilink2" title="de:stl:algorithm:unique_copy" rel="nofollow">de</a></div></li> <li><div class="li"><a href="../../es/stl/algorithm/unique_copy.html" class="wikilink2" title="es:stl:algorithm:unique_copy" rel="nofollow">es</a></div></li> <li><div class="li"><a href="../../fr/stl/algorithm/unique_copy.html" class="wikilink2" title="fr:stl:algorithm:unique_copy" rel="nofollow">fr</a></div></li> <li><div class="li"><a href="../../it/stl/algorithm/unique_copy.html" class="wikilink2" title="it:stl:algorithm:unique_copy" rel="nofollow">it</a></div></li> <li><div class="li"><a href="../../jp/stl/algorithm/unique_copy.html" class="wikilink1" title="jp:stl:algorithm:unique_copy">jp</a></div></li> <li><div class="li"><a href="../../nl/stl/algorithm/unique_copy.html" class="wikilink2" title="nl:stl:algorithm:unique_copy" rel="nofollow">nl</a></div></li> <li><div class="li"><a href="../../pl/stl/algorithm/unique_copy.html" class="wikilink2" title="pl:stl:algorithm:unique_copy" rel="nofollow">pl</a></div></li> <li><div class="li"><a href="../../ro/stl/algorithm/unique_copy.html" class="wikilink2" title="ro:stl:algorithm:unique_copy" rel="nofollow">ro</a></div></li> <li><div class="li"><a href="../../ru/stl/algorithm/unique_copy.html" class="wikilink2" title="ru:stl:algorithm:unique_copy" rel="nofollow">ru</a></div></li> <li><div class="li"><a href="../../sk/stl/algorithm/unique_copy.html" class="wikilink2" title="sk:stl:algorithm:unique_copy" rel="nofollow">sk</a></div></li> <li><div class="li"><a href="../../tr/stl/algorithm/unique_copy.html" class="wikilink2" title="tr:stl:algorithm:unique_copy" rel="nofollow">tr</a></div></li> <li><div class="li"><a href="../../tw/stl/algorithm/unique_copy.html" class="wikilink2" title="tw:stl:algorithm:unique_copy" rel="nofollow">tw</a></div></li></ul></div>
<div class="page">
</script>
<script type="text/javascript">
_uacct = "UA-2828341-1";
urchinTracker();
</script>
<!-- wikipage start -->
<h2><a name="unique_copy" id="unique_copy">unique_copy</a></h2>
<div class="level2">
<p>
Syntax:
</p>
<pre class="c code c++" style="font-family:monospace;"> <span class="co2">#include <algorithm></span>
output_iterator unique_copy<span class="br0">(</span> input_iterator start<span class="sy0">,</span> input_iterator end<span class="sy0">,</span> output_iterator result <span class="br0">)</span><span class="sy0">;</span>
output_iterator unique_copy<span class="br0">(</span> input_iterator start<span class="sy0">,</span> input_iterator end<span class="sy0">,</span> output_iterator result<span class="sy0">,</span> BinPred p <span class="br0">)</span><span class="sy0">;</span></pre>
<p>
The unique_copy() function copies the range [start,end) to result, removing all
consecutive duplicate elements. If the binary predicate p is provided, then it
is used to test two elements to see if they are duplicates.
</p>
<p>
The return value of unique_copy() is an iterator to the end of the new range.
</p>
<p>
unique_copy() runs in <a href="../../complexity.html" class="wikilink1" title="complexity">linear time</a>.
</p>
<p>
Related Topics: <a href="../../stl/algorithm/adjacent_find.html" class="wikilink1" title="stl:algorithm:adjacent_find">adjacent_find</a>, <a href="../../stl/algorithm/remove.html" class="wikilink1" title="stl:algorithm:remove">remove</a>, <a href="../../stl/algorithm/unique.html" class="wikilink1" title="stl:algorithm:unique">unique</a>
</p>
</div>
<div class="secedit"><form class="button btn_secedit" method="post" action="/wiki/stl/algorithm/unique_copy"><div class="no"><input type="hidden" name="do" value="edit" /><input type="hidden" name="lines" value="3-" /><input type="hidden" name="rev" value="1255076132" /><input type="submit" value="Edit" class="button" title="unique_copy" /></div></form></div>
<!-- wikipage stop -->
</div>
<div class="clearer"> </div>
<div class="stylefoot">
<div class="meta">
<div class="user">
</div>
<!--
<div class="doc">
stl/algorithm/unique_copy.txt · Last modified: 10/09/2009 01:15 by 124.255.102.233 </div>
-->
</div>
<div class="bar" id="bar__bottom">
<div class="bar-left" id="bar__bottomleft">
<a href="../../stl/algorithm/unique_copy.html" class="action edit" accesskey="e" rel="nofollow">Edit this page</a> •
<a href="../../stl/algorithm/unique_copy.html" class="action revisions" accesskey="o" rel="nofollow">Old revisions</a> </div>
<div class="bar-right" id="bar__bottomright">
•
•
•
<a href="../../stl/algorithm/unique_copy.html" class="action login" rel="nofollow">Login</a> •
<a href="../../stl/algorithm/unique_copy.html" class="action index" accesskey="x" rel="nofollow">Index</a> •
<a href="../../stl/algorithm/unique_copy.html" class="action recent" accesskey="r" rel="nofollow">Recent changes</a> •
<a href="../../feed.php.html" title="Recent changes RSS feed">RSS</a> •
<form action="/wiki/" accept-charset="utf-8" class="search" id="dw__search"><div class="no"><input type="hidden" name="do" value="search" /><input type="text" id="qsearch__in" accesskey="f" name="id" class="edit" title="[ALT+F]" /><input type="submit" value="Search" class="button" title="Search" /><div id="qsearch__out" class="ajax_qsearch JSpopup"></div></div></form>
</div>
<div class="clearer"></div>
</div>
</div>
</div>
<div class="no"><img src="/wiki/lib/exe/indexer.php?id=stl%3Aalgorithm%3Aunique_copy&1273196979" width="1" height="1" alt="" /></div>
</body>
</html>