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<a href="#pub-methods">Public Member Functions</a> &#124;
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<a href="../../db/d36/classothers_1_1_cache_1_1_l_f_u_cache-members.html">List of all members</a> </div>
<div class="headertitle"><div class="title">others::Cache::LFUCache&lt; K, V &gt; Class Template Reference</div></div>
</div><!--header-->
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<p><a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html" title="LFUCache.">LFUCache</a>.
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Collaboration diagram for others::Cache::LFUCache&lt; K, V &gt;:</div>
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<div class="center"><div class="zoom"><iframe scrolling="no" frameborder="0" src="../../d4/d53/classothers_1_1_cache_1_1_l_f_u_cache__coll__graph.svg" width="100%" height="452"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div></div>
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<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pub-methods" name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:affd7776c246caa2d0f92fd8616f6e5dc" id="r_affd7776c246caa2d0f92fd8616f6e5dc"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#affd7776c246caa2d0f92fd8616f6e5dc">LFUCache</a> (int <a class="el" href="#a3acc10e6bb67d9d9c4187f625723e6c5">_capacity</a>)</td></tr>
<tr class="memdesc:affd7776c246caa2d0f92fd8616f6e5dc"><td class="mdescLeft">&#160;</td><td class="mdescRight">Constructor, Initialize with minFreq and _capacity. <br /></td></tr>
<tr class="separator:affd7776c246caa2d0f92fd8616f6e5dc"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:af6f8e5a66a45436b490dfe015ff8866e" id="r_af6f8e5a66a45436b490dfe015ff8866e"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#af6f8e5a66a45436b490dfe015ff8866e">put</a> (K key, V value)</td></tr>
<tr class="memdesc:af6f8e5a66a45436b490dfe015ff8866e"><td class="mdescLeft">&#160;</td><td class="mdescRight">upsert a key-value pair <br /></td></tr>
<tr class="separator:af6f8e5a66a45436b490dfe015ff8866e"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a58e37d3713f28d36abbb8cdf6c432781" id="r_a58e37d3713f28d36abbb8cdf6c432781"><td class="memItemLeft" align="right" valign="top">V&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a58e37d3713f28d36abbb8cdf6c432781">get</a> (K key)</td></tr>
<tr class="memdesc:a58e37d3713f28d36abbb8cdf6c432781"><td class="mdescLeft">&#160;</td><td class="mdescRight">get the value of the key-value pair if exists <br /></td></tr>
<tr class="separator:a58e37d3713f28d36abbb8cdf6c432781"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:adbfb2ef7358423fdf1f49d410f55f195" id="r_adbfb2ef7358423fdf1f49d410f55f195"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#adbfb2ef7358423fdf1f49d410f55f195">size</a> () const</td></tr>
<tr class="memdesc:adbfb2ef7358423fdf1f49d410f55f195"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the number of items present in the cache. <br /></td></tr>
<tr class="separator:adbfb2ef7358423fdf1f49d410f55f195"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ac27c9076377cbed2a2acc45a189fed2c" id="r_ac27c9076377cbed2a2acc45a189fed2c"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ac27c9076377cbed2a2acc45a189fed2c">capacity</a> () const</td></tr>
<tr class="memdesc:ac27c9076377cbed2a2acc45a189fed2c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the total capacity of the cache. <br /></td></tr>
<tr class="separator:ac27c9076377cbed2a2acc45a189fed2c"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a68e1be0a3e0a6478aa35f04000e0e9b0" id="r_a68e1be0a3e0a6478aa35f04000e0e9b0"><td class="memItemLeft" align="right" valign="top">bool&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a68e1be0a3e0a6478aa35f04000e0e9b0">empty</a> () const</td></tr>
<tr class="memdesc:a68e1be0a3e0a6478aa35f04000e0e9b0"><td class="mdescLeft">&#160;</td><td class="mdescRight">returns true if the cache is empty, false otherwise. <br /></td></tr>
<tr class="separator:a68e1be0a3e0a6478aa35f04000e0e9b0"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a8857531ecc8ed2e36868e267148eff36" id="r_a8857531ecc8ed2e36868e267148eff36"><td class="memItemLeft" align="right" valign="top">&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a8857531ecc8ed2e36868e267148eff36">~LFUCache</a> ()</td></tr>
<tr class="memdesc:a8857531ecc8ed2e36868e267148eff36"><td class="mdescLeft">&#160;</td><td class="mdescRight">destructs the cache, iterates on the map and deletes every node present in the cache. <br /></td></tr>
<tr class="separator:a8857531ecc8ed2e36868e267148eff36"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pri-methods" name="pri-methods"></a>
Private Member Functions</h2></td></tr>
<tr class="memitem:adad4ab43141fb8ba43facd3a71e07047" id="r_adad4ab43141fb8ba43facd3a71e07047"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#adad4ab43141fb8ba43facd3a71e07047">push</a> (int freq, <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *<a class="el" href="../../d5/da1/structnode.html">node</a>)</td></tr>
<tr class="memdesc:adad4ab43141fb8ba43facd3a71e07047"><td class="mdescLeft">&#160;</td><td class="mdescRight">push the node at first position in the linked list of given frequency <br /></td></tr>
<tr class="separator:adad4ab43141fb8ba43facd3a71e07047"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a16a25c102554c5653721a5112ef676c9" id="r_a16a25c102554c5653721a5112ef676c9"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#a16a25c102554c5653721a5112ef676c9">increase_frequency</a> (<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a>&lt; <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *, int &gt; &amp;p_node)</td></tr>
<tr class="memdesc:a16a25c102554c5653721a5112ef676c9"><td class="mdescLeft">&#160;</td><td class="mdescRight">increase the frequency of node and push it in the respective list. <br /></td></tr>
<tr class="separator:a16a25c102554c5653721a5112ef676c9"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:ab3561ab204754295199f9566924f7e69" id="r_ab3561ab204754295199f9566924f7e69"><td class="memItemLeft" align="right" valign="top">void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ab3561ab204754295199f9566924f7e69">pop</a> ()</td></tr>
<tr class="memdesc:ab3561ab204754295199f9566924f7e69"><td class="mdescLeft">&#160;</td><td class="mdescRight">pop the last node in the least frequently used linked list <br /></td></tr>
<tr class="separator:ab3561ab204754295199f9566924f7e69"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="pri-attribs" name="pri-attribs"></a>
Private Attributes</h2></td></tr>
<tr class="memitem:ac7684879e2e5da3d8bc5b1699ee42d35" id="r_ac7684879e2e5da3d8bc5b1699ee42d35"><td class="memItemLeft" align="right" valign="top"><a id="ac7684879e2e5da3d8bc5b1699ee42d35" name="ac7684879e2e5da3d8bc5b1699ee42d35"></a>
<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/unordered_map.html">std::unordered_map</a>&lt; K, <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a>&lt; <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *, int &gt; &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>node_map</b></td></tr>
<tr class="memdesc:ac7684879e2e5da3d8bc5b1699ee42d35"><td class="mdescLeft">&#160;</td><td class="mdescRight">maps the key to the node address and frequency <br /></td></tr>
<tr class="separator:ac7684879e2e5da3d8bc5b1699ee42d35"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:aba5d59d0f6ab0c0d30a92551ca5a05f2" id="r_aba5d59d0f6ab0c0d30a92551ca5a05f2"><td class="memItemLeft" align="right" valign="top"><a id="aba5d59d0f6ab0c0d30a92551ca5a05f2" name="aba5d59d0f6ab0c0d30a92551ca5a05f2"></a>
<a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/unordered_map.html">std::unordered_map</a>&lt; int, <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a>&lt; <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *, <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; * &gt; &gt;&#160;</td><td class="memItemRight" valign="bottom"><b>freq_map</b></td></tr>
<tr class="memdesc:aba5d59d0f6ab0c0d30a92551ca5a05f2"><td class="mdescLeft">&#160;</td><td class="mdescRight">maps the frequency to doubly linked list <br /></td></tr>
<tr class="separator:aba5d59d0f6ab0c0d30a92551ca5a05f2"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a6de844d1589a809239cc07752f311285" id="r_a6de844d1589a809239cc07752f311285"><td class="memItemLeft" align="right" valign="top"><a id="a6de844d1589a809239cc07752f311285" name="a6de844d1589a809239cc07752f311285"></a>
int&#160;</td><td class="memItemRight" valign="bottom"><b>minFreq</b></td></tr>
<tr class="memdesc:a6de844d1589a809239cc07752f311285"><td class="mdescLeft">&#160;</td><td class="mdescRight">minimum frequency in the cache <br /></td></tr>
<tr class="separator:a6de844d1589a809239cc07752f311285"><td class="memSeparator" colspan="2">&#160;</td></tr>
<tr class="memitem:a3acc10e6bb67d9d9c4187f625723e6c5" id="r_a3acc10e6bb67d9d9c4187f625723e6c5"><td class="memItemLeft" align="right" valign="top"><a id="a3acc10e6bb67d9d9c4187f625723e6c5" name="a3acc10e6bb67d9d9c4187f625723e6c5"></a>
int&#160;</td><td class="memItemRight" valign="bottom"><b>_capacity</b></td></tr>
<tr class="memdesc:a3acc10e6bb67d9d9c4187f625723e6c5"><td class="mdescLeft">&#160;</td><td class="mdescRight">maximum capacity of the cache <br /></td></tr>
<tr class="separator:a3acc10e6bb67d9d9c4187f625723e6c5"><td class="memSeparator" colspan="2">&#160;</td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><div class="compoundTemplParams">template&lt;typename K, typename V&gt;<br />
class others::Cache::LFUCache&lt; K, V &gt;</div><p><a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html" title="LFUCache.">LFUCache</a>. </p>
<dl class="tparams"><dt>Template Parameters</dt><dd>
<table class="tparams">
<tr><td class="paramname">K</td><td>type of key in the LFU </td></tr>
<tr><td class="paramname">V</td><td>type of value in the LFU </td></tr>
</table>
</dd>
</dl>
</div><h2 class="groupheader">Constructor &amp; Destructor Documentation</h2>
<a id="affd7776c246caa2d0f92fd8616f6e5dc" name="affd7776c246caa2d0f92fd8616f6e5dc"></a>
<h2 class="memtitle"><span class="permalink"><a href="#affd7776c246caa2d0f92fd8616f6e5dc">&#9670;&#160;</a></span>LFUCache()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename K , typename V &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::LFUCache </td>
<td>(</td>
<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>_capacity</em></span></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">explicit</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>Constructor, Initialize with minFreq and _capacity. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">_capacity</td><td>Total capacity of the cache. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 78</span>: <a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a>(0), <a class="code hl_variable" href="#a3acc10e6bb67d9d9c4187f625723e6c5">_capacity</a>(<a class="code hl_variable" href="#a3acc10e6bb67d9d9c4187f625723e6c5">_capacity</a>) {}</div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_a3acc10e6bb67d9d9c4187f625723e6c5"><div class="ttname"><a href="#a3acc10e6bb67d9d9c4187f625723e6c5">others::Cache::LFUCache::_capacity</a></div><div class="ttdeci">int _capacity</div><div class="ttdoc">maximum capacity of the cache</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:71</div></div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_a6de844d1589a809239cc07752f311285"><div class="ttname"><a href="#a6de844d1589a809239cc07752f311285">others::Cache::LFUCache::minFreq</a></div><div class="ttdeci">int minFreq</div><div class="ttdoc">minimum frequency in the cache</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:70</div></div>
</div><!-- fragment -->
</div>
</div>
<a id="a8857531ecc8ed2e36868e267148eff36" name="a8857531ecc8ed2e36868e267148eff36"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a8857531ecc8ed2e36868e267148eff36">&#9670;&#160;</a></span>~LFUCache()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename K , typename V &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::~<a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">LFUCache</a> </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td></td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>destructs the cache, iterates on the map and deletes every node present in the cache. </p>
<div class="fragment"><div class="line"><span class="lineno"> 235</span> {</div>
<div class="line"><span class="lineno"> 236</span> <span class="keyword">auto</span> it = <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.begin();</div>
<div class="line"><span class="lineno"> 237</span> <span class="keywordflow">while</span> (it != <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.end()) {</div>
<div class="line"><span class="lineno"> 238</span> <span class="keyword">delete</span> it-&gt;second.first;</div>
<div class="line"><span class="lineno"> 239</span> ++it;</div>
<div class="line"><span class="lineno"> 240</span> }</div>
<div class="line"><span class="lineno"> 241</span> }</div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_ac7684879e2e5da3d8bc5b1699ee42d35"><div class="ttname"><a href="#ac7684879e2e5da3d8bc5b1699ee42d35">others::Cache::LFUCache::node_map</a></div><div class="ttdeci">std::unordered_map&lt; K, std::pair&lt; CacheNode&lt; K, V &gt; *, int &gt; &gt; node_map</div><div class="ttdoc">maps the key to the node address and frequency</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:66</div></div>
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<h2 class="groupheader">Member Function Documentation</h2>
<a id="ac27c9076377cbed2a2acc45a189fed2c" name="ac27c9076377cbed2a2acc45a189fed2c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ac27c9076377cbed2a2acc45a189fed2c">&#9670;&#160;</a></span>capacity()</h2>
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template&lt;typename K , typename V &gt; </div>
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<td class="memname">int <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::capacity </td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
<td> const</td>
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<p>Returns the total capacity of the cache. </p>
<dl class="section return"><dt>Returns</dt><dd>Total capacity of the cache </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 223</span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="#a3acc10e6bb67d9d9c4187f625723e6c5">_capacity</a>; }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a68e1be0a3e0a6478aa35f04000e0e9b0">&#9670;&#160;</a></span>empty()</h2>
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template&lt;typename K , typename V &gt; </div>
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<td class="memname">bool <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::empty </td>
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<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<p>returns true if the cache is empty, false otherwise. </p>
<dl class="section return"><dt>Returns</dt><dd>true if the cache is empty, false otherwise. </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 229</span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.empty(); }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a58e37d3713f28d36abbb8cdf6c432781">&#9670;&#160;</a></span>get()</h2>
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template&lt;typename K , typename V &gt; </div>
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<td class="memname">V <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::get </td>
<td>(</td>
<td class="paramtype">K</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
<td></td>
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<p>get the value of the key-value pair if exists </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key of the key-value pair </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>the value mapped to the given key </dd></dl>
<dl class="exception"><dt>Exceptions</dt><dd>
<table class="exception">
<tr><td class="paramname">exception</td><td>is thrown if the key is not present in the cache </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 202</span> {</div>
<div class="line"><span class="lineno"> 203</span> <span class="keywordflow">if</span> (!<a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.count(key)) {</div>
<div class="line"><span class="lineno"> 204</span> <span class="keywordflow">throw</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/error/runtime_error.html">std::runtime_error</a>(<span class="stringliteral">&quot;key is not present in the cache&quot;</span>);</div>
<div class="line"><span class="lineno"> 205</span> }</div>
<div class="line"><span class="lineno"> 206</span> </div>
<div class="line"><span class="lineno"> 207</span> <span class="comment">// increase the frequency and return the value</span></div>
<div class="line"><span class="lineno"> 208</span> V value = <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>[key].first-&gt;data.second;</div>
<div class="line"><span class="lineno"> 209</span> <a class="code hl_function" href="#a16a25c102554c5653721a5112ef676c9">increase_frequency</a>(<a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>[key]);</div>
<div class="line"><span class="lineno"> 210</span> <span class="keywordflow">return</span> value;</div>
<div class="line"><span class="lineno"> 211</span> }</div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_a16a25c102554c5653721a5112ef676c9"><div class="ttname"><a href="#a16a25c102554c5653721a5112ef676c9">others::Cache::LFUCache::increase_frequency</a></div><div class="ttdeci">void increase_frequency(std::pair&lt; CacheNode&lt; K, V &gt; *, int &gt; &amp;p_node)</div><div class="ttdoc">increase the frequency of node and push it in the respective list.</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:109</div></div>
<div class="ttc" id="aruntime_error_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/error/runtime_error.html">std::runtime_error</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a16a25c102554c5653721a5112ef676c9">&#9670;&#160;</a></span>increase_frequency()</h2>
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<td class="memname">void <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::increase_frequency </td>
<td>(</td>
<td class="paramtype"><a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair</a>&lt; <a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *, int &gt; &amp;</td> <td class="paramname"><span class="paramname"><em>p_node</em></span></td><td>)</td>
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<p>increase the frequency of node and push it in the respective list. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">p_node</td><td>the node to be updated </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 109</span> {</div>
<div class="line"><span class="lineno"> 110</span> CacheNode&lt;K, V&gt; *<a class="code hl_class" href="../../d5/da1/structnode.html">node</a> = p_node.first;</div>
<div class="line"><span class="lineno"> 111</span> <span class="keywordtype">int</span> freq = p_node.second;</div>
<div class="line"><span class="lineno"> 112</span> </div>
<div class="line"><span class="lineno"> 113</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;CacheNode&lt;K, V&gt;</a> *, CacheNode&lt;K, V&gt; *&gt; &amp;p = <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>[freq];</div>
<div class="line"><span class="lineno"> 114</span> </div>
<div class="line"><span class="lineno"> 115</span> <span class="comment">// if the given node is the only node in the list,</span></div>
<div class="line"><span class="lineno"> 116</span> <span class="comment">// then erase the frequency from map</span></div>
<div class="line"><span class="lineno"> 117</span> <span class="comment">// and increase minFreq by 1.</span></div>
<div class="line"><span class="lineno"> 118</span> <span class="keywordflow">if</span> (p.first == <a class="code hl_class" href="../../d5/da1/structnode.html">node</a> &amp;&amp; p.second == <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>) {</div>
<div class="line"><span class="lineno"> 119</span> <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>.erase(freq);</div>
<div class="line"><span class="lineno"> 120</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a> == freq) {</div>
<div class="line"><span class="lineno"> 121</span> <a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a> = freq + 1;</div>
<div class="line"><span class="lineno"> 122</span> }</div>
<div class="line"><span class="lineno"> 123</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 124</span> <span class="comment">// remove the given node from current freq linked list</span></div>
<div class="line"><span class="lineno"> 125</span> CacheNode&lt;K, V&gt; *<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/prev.html">prev</a> = <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;prev;</div>
<div class="line"><span class="lineno"> 126</span> CacheNode&lt;K, V&gt; *<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/next.html">next</a> = <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;next;</div>
<div class="line"><span class="lineno"> 127</span> <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;prev = <span class="keyword">nullptr</span>;</div>
<div class="line"><span class="lineno"> 128</span> <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;next = <span class="keyword">nullptr</span>;</div>
<div class="line"><span class="lineno"> 129</span> </div>
<div class="line"><span class="lineno"> 130</span> <span class="keywordflow">if</span> (prev) {</div>
<div class="line"><span class="lineno"> 131</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/prev.html">prev</a>-&gt;next = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/next.html">next</a>;</div>
<div class="line"><span class="lineno"> 132</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 133</span> p.first = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/next.html">next</a>;</div>
<div class="line"><span class="lineno"> 134</span> }</div>
<div class="line"><span class="lineno"> 135</span> </div>
<div class="line"><span class="lineno"> 136</span> <span class="keywordflow">if</span> (next) {</div>
<div class="line"><span class="lineno"> 137</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/next.html">next</a>-&gt;prev = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/prev.html">prev</a>;</div>
<div class="line"><span class="lineno"> 138</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><span class="lineno"> 139</span> p.second = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/prev.html">prev</a>;</div>
<div class="line"><span class="lineno"> 140</span> }</div>
<div class="line"><span class="lineno"> 141</span> }</div>
<div class="line"><span class="lineno"> 142</span> <a class="code hl_function" href="#adad4ab43141fb8ba43facd3a71e07047">push</a>(freq + 1, <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>);</div>
<div class="line"><span class="lineno"> 143</span> ++p_node.second;</div>
<div class="line"><span class="lineno"> 144</span> }</div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_aba5d59d0f6ab0c0d30a92551ca5a05f2"><div class="ttname"><a href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">others::Cache::LFUCache::freq_map</a></div><div class="ttdeci">std::unordered_map&lt; int, std::pair&lt; CacheNode&lt; K, V &gt; *, CacheNode&lt; K, V &gt; * &gt; &gt; freq_map</div><div class="ttdoc">maps the frequency to doubly linked list</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:68</div></div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_adad4ab43141fb8ba43facd3a71e07047"><div class="ttname"><a href="#adad4ab43141fb8ba43facd3a71e07047">others::Cache::LFUCache::push</a></div><div class="ttdeci">void push(int freq, CacheNode&lt; K, V &gt; *node)</div><div class="ttdoc">push the node at first position in the linked list of given frequency</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:88</div></div>
<div class="ttc" id="anext_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/next.html">std::next</a></div><div class="ttdeci">T next(T... args)</div></div>
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<div class="ttc" id="aprev_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/prev.html">std::prev</a></div><div class="ttdeci">T prev(T... args)</div></div>
<div class="ttc" id="astructnode_html"><div class="ttname"><a href="../../d5/da1/structnode.html">node</a></div><div class="ttdef"><b>Definition</b> binary_search_tree.cpp:11</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ab3561ab204754295199f9566924f7e69">&#9670;&#160;</a></span>pop()</h2>
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<td class="memname">void <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::pop </td>
<td>(</td>
<td class="paramname"><span class="paramname"><em></em></span></td><td>)</td>
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<p>pop the last node in the least frequently used linked list </p>
<div class="fragment"><div class="line"><span class="lineno"> 149</span> {</div>
<div class="line"><span class="lineno"> 150</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;CacheNode&lt;K, V&gt;</a> *, CacheNode&lt;K, V&gt; *&gt; &amp;p = <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>[<a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a>];</div>
<div class="line"><span class="lineno"> 151</span> </div>
<div class="line"><span class="lineno"> 152</span> <span class="comment">// if there is only one node</span></div>
<div class="line"><span class="lineno"> 153</span> <span class="comment">// remove the node and erase</span></div>
<div class="line"><span class="lineno"> 154</span> <span class="comment">// the frequency from freq_map</span></div>
<div class="line"><span class="lineno"> 155</span> <span class="keywordflow">if</span> (p.first == p.second) {</div>
<div class="line"><span class="lineno"> 156</span> <span class="keyword">delete</span> p.first;</div>
<div class="line"><span class="lineno"> 157</span> <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>.erase(<a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a>);</div>
<div class="line"><span class="lineno"> 158</span> <span class="keywordflow">return</span>;</div>
<div class="line"><span class="lineno"> 159</span> }</div>
<div class="line"><span class="lineno"> 160</span> </div>
<div class="line"><span class="lineno"> 161</span> <span class="comment">// remove the last node in the linked list</span></div>
<div class="line"><span class="lineno"> 162</span> CacheNode&lt;K, V&gt; *temp = p.second;</div>
<div class="line"><span class="lineno"> 163</span> p.second = temp-&gt;prev;</div>
<div class="line"><span class="lineno"> 164</span> p.second-&gt;next = <span class="keyword">nullptr</span>;</div>
<div class="line"><span class="lineno"> 165</span> <span class="keyword">delete</span> temp;</div>
<div class="line"><span class="lineno"> 166</span> }</div>
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<h2 class="memtitle"><span class="permalink"><a href="#adad4ab43141fb8ba43facd3a71e07047">&#9670;&#160;</a></span>push()</h2>
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<td class="memname">void <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::push </td>
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<td class="paramkey"></td>
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<td class="paramtype"><a class="el" href="../../de/d21/classothers_1_1_cache_1_1_d___node.html">CacheNode</a>&lt; K, V &gt; *</td> <td class="paramname"><span class="paramname"><em>node</em></span>&#160;)</td>
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<p>push the node at first position in the linked list of given frequency </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">freq</td><td>the frequency mapping to the linked list where node should be pushed. </td></tr>
<tr><td class="paramname">node</td><td>node to be pushed to the linked list. </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 88</span> {</div>
<div class="line"><span class="lineno"> 89</span> <span class="comment">// if freq is not present, then make a new list with node as the head as</span></div>
<div class="line"><span class="lineno"> 90</span> <span class="comment">// well as tail.</span></div>
<div class="line"><span class="lineno"> 91</span> <span class="keywordflow">if</span> (!<a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>.count(freq)) {</div>
<div class="line"><span class="lineno"> 92</span> <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>[freq] = {<a class="code hl_typedef" href="../../d8/dee/avltree_8cpp.html#a74f0cf18a0e5b832d9994e2f2d022287">node</a>, <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>};</div>
<div class="line"><span class="lineno"> 93</span> <span class="keywordflow">return</span>;</div>
<div class="line"><span class="lineno"> 94</span> }</div>
<div class="line"><span class="lineno"> 95</span> </div>
<div class="line"><span class="lineno"> 96</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/utility/pair.html">std::pair&lt;CacheNode&lt;K, V&gt;</a> *, CacheNode&lt;K, V&gt; *&gt; &amp;p = <a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>[freq];</div>
<div class="line"><span class="lineno"> 97</span> </div>
<div class="line"><span class="lineno"> 98</span> <span class="comment">// insert the node at the beginning of the linked list and update the</span></div>
<div class="line"><span class="lineno"> 99</span> <span class="comment">// head.</span></div>
<div class="line"><span class="lineno"> 100</span> p.first-&gt;prev = <a class="code hl_typedef" href="../../d8/dee/avltree_8cpp.html#a74f0cf18a0e5b832d9994e2f2d022287">node</a>;</div>
<div class="line"><span class="lineno"> 101</span> <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;next = p.first;</div>
<div class="line"><span class="lineno"> 102</span> p.first = <a class="code hl_typedef" href="../../d8/dee/avltree_8cpp.html#a74f0cf18a0e5b832d9994e2f2d022287">node</a>;</div>
<div class="line"><span class="lineno"> 103</span> }</div>
<div class="ttc" id="aavltree_8cpp_html_a74f0cf18a0e5b832d9994e2f2d022287"><div class="ttname"><a href="../../d8/dee/avltree_8cpp.html#a74f0cf18a0e5b832d9994e2f2d022287">node</a></div><div class="ttdeci">struct node { int data; int height; struct node *left; struct node *right;} node</div><div class="ttdoc">for std::queue</div><div class="ttdef"><b>Definition</b> avltree.cpp:13</div></div>
</div><!-- fragment -->
</div>
</div>
<a id="af6f8e5a66a45436b490dfe015ff8866e" name="af6f8e5a66a45436b490dfe015ff8866e"></a>
<h2 class="memtitle"><span class="permalink"><a href="#af6f8e5a66a45436b490dfe015ff8866e">&#9670;&#160;</a></span>put()</h2>
<div class="memitem">
<div class="memproto">
<div class="memtemplate">
template&lt;typename K , typename V &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
<table class="memname">
<tr>
<td class="memname">void <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::put </td>
<td>(</td>
<td class="paramtype">K</td> <td class="paramname"><span class="paramname"><em>key</em></span>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">V</td> <td class="paramname"><span class="paramname"><em>value</em></span>&#160;)</td>
</tr>
</table>
</td>
<td class="mlabels-right">
<span class="mlabels"><span class="mlabel">inline</span></span> </td>
</tr>
</table>
</div><div class="memdoc">
<p>upsert a key-value pair </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">key</td><td>key of the key-value pair </td></tr>
<tr><td class="paramname">value</td><td>value of the key-value pair </td></tr>
</table>
</dd>
</dl>
<div class="fragment"><div class="line"><span class="lineno"> 174</span> {</div>
<div class="line"><span class="lineno"> 175</span> <span class="comment">// update the value if key already exists</span></div>
<div class="line"><span class="lineno"> 176</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.count(key)) {</div>
<div class="line"><span class="lineno"> 177</span> <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>[key].first-&gt;data.second = value;</div>
<div class="line"><span class="lineno"> 178</span> <a class="code hl_function" href="#a16a25c102554c5653721a5112ef676c9">increase_frequency</a>(<a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>[key]);</div>
<div class="line"><span class="lineno"> 179</span> <span class="keywordflow">return</span>;</div>
<div class="line"><span class="lineno"> 180</span> }</div>
<div class="line"><span class="lineno"> 181</span> </div>
<div class="line"><span class="lineno"> 182</span> <span class="comment">// if the cache is full</span></div>
<div class="line"><span class="lineno"> 183</span> <span class="comment">// remove the least frequently used item</span></div>
<div class="line"><span class="lineno"> 184</span> <span class="keywordflow">if</span> (<a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.size() == <a class="code hl_variable" href="#a3acc10e6bb67d9d9c4187f625723e6c5">_capacity</a>) {</div>
<div class="line"><span class="lineno"> 185</span> <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.erase(<a class="code hl_variable" href="#aba5d59d0f6ab0c0d30a92551ca5a05f2">freq_map</a>[<a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a>].second-&gt;data.first);</div>
<div class="line"><span class="lineno"> 186</span> <a class="code hl_function" href="#ab3561ab204754295199f9566924f7e69">pop</a>();</div>
<div class="line"><span class="lineno"> 187</span> }</div>
<div class="line"><span class="lineno"> 188</span> </div>
<div class="line"><span class="lineno"> 189</span> <span class="comment">// insert the new node and set minFreq to 1</span></div>
<div class="line"><span class="lineno"> 190</span> CacheNode&lt;K, V&gt; *<a class="code hl_class" href="../../d5/da1/structnode.html">node</a> = <span class="keyword">new</span> CacheNode&lt;K, V&gt;({key, value});</div>
<div class="line"><span class="lineno"> 191</span> <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>[key] = {<a class="code hl_typedef" href="../../d8/dee/avltree_8cpp.html#a74f0cf18a0e5b832d9994e2f2d022287">node</a>, 1};</div>
<div class="line"><span class="lineno"> 192</span> <a class="code hl_variable" href="#a6de844d1589a809239cc07752f311285">minFreq</a> = 1;</div>
<div class="line"><span class="lineno"> 193</span> <a class="code hl_function" href="#adad4ab43141fb8ba43facd3a71e07047">push</a>(1, <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>);</div>
<div class="line"><span class="lineno"> 194</span> }</div>
<div class="ttc" id="aclassothers_1_1_cache_1_1_l_f_u_cache_html_ab3561ab204754295199f9566924f7e69"><div class="ttname"><a href="#ab3561ab204754295199f9566924f7e69">others::Cache::LFUCache::pop</a></div><div class="ttdeci">void pop()</div><div class="ttdoc">pop the last node in the least frequently used linked list</div><div class="ttdef"><b>Definition</b> lfu_cache.cpp:149</div></div>
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Here is the call graph for this function:</div>
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<h2 class="memtitle"><span class="permalink"><a href="#adbfb2ef7358423fdf1f49d410f55f195">&#9670;&#160;</a></span>size()</h2>
<div class="memitem">
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<div class="memtemplate">
template&lt;typename K , typename V &gt; </div>
<table class="mlabels">
<tr>
<td class="mlabels-left">
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<tr>
<td class="memname">int <a class="el" href="../../df/d8f/classothers_1_1_cache_1_1_l_f_u_cache.html">others::Cache::LFUCache</a>&lt; K, V &gt;::size </td>
<td>(</td>
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<p>Returns the number of items present in the cache. </p>
<dl class="section return"><dt>Returns</dt><dd>number of items in the cache </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 217</span>{ <span class="keywordflow">return</span> <a class="code hl_variable" href="#ac7684879e2e5da3d8bc5b1699ee42d35">node_map</a>.size(); }</div>
</div><!-- fragment -->
</div>
</div>
<hr/>The documentation for this class was generated from the following file:<ul>
<li>others/<a class="el" href="../../d9/d65/lfu__cache_8cpp.html">lfu_cache.cpp</a></li>
</ul>
</div><!-- contents -->
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