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| <div class="section"> |
| <div class="titlepage"><div><div><h5 class="title"> |
| <a name="range.reference.algorithms.mutating.nth_element"></a><a class="link" href="nth_element.html" title="nth_element"> |
| nth_element</a> |
| </h5></div></div></div> |
| <a name="range.reference.algorithms.mutating.nth_element.prototype"></a><h6> |
| <a name="id799243"></a> |
| <a class="link" href="nth_element.html#range.reference.algorithms.mutating.nth_element.prototype">Prototype</a> |
| </h6> |
| <p> |
| |
| </p> |
| <pre class="programlisting"><span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">RandomAccessRange</span><span class="special">></span> |
| <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">nth_element</span><span class="special">(</span> |
| <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">RandomAccessRange</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">nth</span><span class="special">);</span> |
| |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">RandomAccessRange</span><span class="special">></span> |
| <span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">nth_element</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">nth</span><span class="special">);</span> |
| |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">RandomAccessRange</span><span class="special">></span> |
| <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">nth_element</span><span class="special">(</span> |
| <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="identifier">RandomAccessRange</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">nth</span><span class="special">,</span> |
| <span class="identifier">BinaryPredicate</span> <span class="identifier">sort_pred</span><span class="special">);</span> |
| |
| <span class="keyword">template</span><span class="special"><</span><span class="keyword">class</span> <span class="identifier">RandomAccessRange</span><span class="special">></span> |
| <span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">nth_element</span><span class="special">(</span> |
| <span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">&</span> <span class="identifier">rng</span><span class="special">,</span> |
| <span class="keyword">typename</span> <span class="identifier">range_iterator</span><span class="special"><</span><span class="keyword">const</span> <span class="identifier">RandomAccessRange</span><span class="special">>::</span><span class="identifier">type</span> <span class="identifier">nth</span><span class="special">,</span> |
| <span class="identifier">BinaryPredicate</span> <span class="identifier">sort_pred</span><span class="special">);</span> |
| </pre> |
| <p> |
| </p> |
| <a name="range.reference.algorithms.mutating.nth_element.description"></a><h6> |
| <a name="id799756"></a> |
| <a class="link" href="nth_element.html#range.reference.algorithms.mutating.nth_element.description">Description</a> |
| </h6> |
| <p> |
| <code class="computeroutput"><span class="identifier">nth_element</span></code> partially |
| orders a range of elements. <code class="computeroutput"><span class="identifier">nth_element</span></code> |
| arranges the range <code class="computeroutput"><span class="identifier">rng</span></code> |
| such that the element corresponding with the iterator <code class="computeroutput"><span class="identifier">nth</span></code> |
| is the same as the element that would be in that position if <code class="computeroutput"><span class="identifier">rng</span></code> has been sorted. |
| </p> |
| <a name="range.reference.algorithms.mutating.nth_element.definition"></a><h6> |
| <a name="id799836"></a> |
| <a class="link" href="nth_element.html#range.reference.algorithms.mutating.nth_element.definition">Definition</a> |
| </h6> |
| <p> |
| Defined in the header file <code class="computeroutput"><span class="identifier">boost</span><span class="special">/</span><span class="identifier">range</span><span class="special">/</span><span class="identifier">algorithm</span><span class="special">/</span><span class="identifier">nth_element</span><span class="special">.</span><span class="identifier">hpp</span></code> |
| </p> |
| <a name="range.reference.algorithms.mutating.nth_element.requirements"></a><h6> |
| <a name="id799906"></a> |
| <a class="link" href="nth_element.html#range.reference.algorithms.mutating.nth_element.requirements">Requirements</a> |
| </h6> |
| <p> |
| <span class="bold"><strong>For the non-predicate version:</strong></span> |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code> |
| is a model of the <a class="link" href="../../../concepts/random_access_range.html" title="Random Access Range">Random |
| Access Range</a> Concept. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code> |
| is mutable. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code>'s |
| value type is a model of the <code class="computeroutput"><span class="identifier">LessThanComparableConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| The ordering relation on <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code>'s |
| value type is a <span class="bold"><strong><span class="emphasis"><em>strict weak ordering</em></span></strong></span>, |
| as defined in the <code class="computeroutput"><span class="identifier">LessThanComparableConcept</span></code> |
| requirements. |
| </li> |
| </ul></div> |
| <p> |
| <span class="bold"><strong>For the predicate version:</strong></span> |
| </p> |
| <div class="itemizedlist"><ul class="itemizedlist" type="disc"> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code> |
| is a model of the <a class="link" href="../../../concepts/random_access_range.html" title="Random Access Range">Random |
| Access Range</a> Concept. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code> |
| is mutable. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code> is |
| a model of the <code class="computeroutput"><span class="identifier">StrictWeakOrderingConcept</span></code>. |
| </li> |
| <li class="listitem"> |
| <code class="computeroutput"><span class="identifier">RandomAccessRange</span></code>'s |
| value type is convertible to both of <code class="computeroutput"><span class="identifier">BinaryPredicate</span></code>'s |
| argument types. |
| </li> |
| </ul></div> |
| <a name="range.reference.algorithms.mutating.nth_element.complexity"></a><h6> |
| <a name="id800163"></a> |
| <a class="link" href="nth_element.html#range.reference.algorithms.mutating.nth_element.complexity">Complexity</a> |
| </h6> |
| <p> |
| On average, linear in <code class="computeroutput"><span class="identifier">distance</span><span class="special">(</span><span class="identifier">rng</span><span class="special">)</span></code>. |
| </p> |
| </div> |
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| <td align="left"></td> |
| <td align="right"><div class="copyright-footer">Copyright © 2003 -2010 Thorsten Ottosen, Neil Groves<p> |
| Distributed under the Boost Software License, Version 1.0. (See accompanying |
| file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>) |
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