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<title>std::unordered_map&lt;Key,T,Hash,KeyEqual,Allocator&gt;::rehash</title>
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<h1 id="firstHeading" class="firstHeading"><span style="font-size:0.7em; line-height:130%">std::unordered_map&lt;Key,T,Hash,KeyEqual,Allocator&gt;::</span>rehash</h1>
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<div id="contentSub"><span class="subpages">&lt; <a href="cpp.html">cpp</a>&lrm; | <a href="cpp-container.html">container</a>&lrm; | <a href="cpp-container-unordered_map.html">unordered map</a></span></div>
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<div><span class="mw-geshi cpp source-cpp"><span class="kw4">void</span> rehash<span class="br0">(</span> size_type count <span class="br0">)</span><span class="sy4">;</span></span></div>
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<td><span class="t-mark-rev t-since-cxx11">(C++11 &#36215;)</span></td>
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<p>&#35774;&#32622;&#26742;&#25968;&#20026; <code>count</code> &#24182;&#37325;&#21704;&#24076;&#23481;&#22120;&#65292;&#21363;&#32771;&#34385;&#26742;&#24635;&#25968;&#24050;&#25913;&#21464;&#65292;&#20877;&#25226;&#20803;&#32032;&#25918;&#21040;&#36866;&#24403;&#30340;&#26742;&#20013;&#12290;&#33509;&#26032;&#30340;&#26742;&#25968;&#20351;&#21152;&#36733;&#22240;&#23376;&#22823;&#20110;&#26368;&#22823;&#21152;&#36733;&#22240;&#23376;&#65288; <span class="t-c"><span class="mw-geshi cpp source-cpp">count <span class="sy1">&lt;</span> size<span class="br0">(</span><span class="br0">)</span> <span class="sy2">/</span> max_load_factor<span class="br0">(</span><span class="br0">)</span></span></span> &#65289;&#65292;&#21017;&#26032;&#26742;&#25968;&#33267;&#23569;&#20026; <span class="t-c"><span class="mw-geshi cpp source-cpp">size<span class="br0">(</span><span class="br0">)</span> <span class="sy2">/</span> max_load_factor<span class="br0">(</span><span class="br0">)</span></span></span> &#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E6.95.B0">&#21442;&#25968;</span></h3>
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<td>count</td>
<td>-</td>
<td>&#26032;&#30340;&#26742;&#25968;</td>
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<h3><span class="mw-headline" id=".E8.BF.94.E5.9B.9E.E5.80.BC">&#36820;&#22238;&#20540;</span></h3>
<p>&#65288;&#26080;&#65289;</p>
<h3><span class="mw-headline" id=".E5.A4.8D.E6.9D.82.E5.BA.A6">&#22797;&#26434;&#24230;</span></h3>
<p>&#24179;&#22343;&#19982;&#23481;&#22120;&#22823;&#23567;&#25104;&#32447;&#24615;&#65292;&#26368;&#22351;&#24773;&#20917;&#25104;&#24179;&#26041;&#12290;</p>
<h3><span class="mw-headline" id=".E6.B3.A8.E6.84.8F">&#27880;&#24847;</span></h3>
<p><code>rehash(0)</code> &#21487;&#29992;&#20110;&#24378;&#21046;&#26080;&#26465;&#20214;&#30340;&#37325;&#21704;&#24076;&#65292;&#20363;&#22914;&#22312;&#36890;&#36807;&#20020;&#26102;&#22686;&#21152; <span class="t-c"><span class="mw-geshi cpp source-cpp">max_load_factor<span class="br0">(</span><span class="br0">)</span></span></span> &#26242;&#20572;&#33258;&#21160;&#37325;&#21704;&#24076;&#20043;&#21518;&#12290;</p>
<h3><span class="mw-headline" id=".E5.8F.82.E9.98.85">&#21442;&#38405;</span></h3>
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<div><a href="cpp-container-unordered_map-reserve.html"><span class="t-lines"><span>reserve</span></span></a></div>
<div><span class="t-lines"><span><span class="t-mark-rev t-since-cxx11">(C++11)</span></span></span></div>
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<td>&#20026;&#33267;&#23569;&#20026;&#25351;&#23450;&#25968;&#37327;&#30340;&#20803;&#32032;&#39044;&#30041;&#23384;&#20648;&#31354;&#38388;&#24182;&#37325;&#26032;&#29983;&#25104;&#21704;&#24076;&#34920;&#12290;<br />
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