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<div class="header">
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<div class="headertitle"><div class="title">quadratic_probing Namespace Reference<div class="ingroups"><a class="el" href="../../d4/d39/group__open__addressing.html">Open Addressing</a></div></div></div>
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<div class="contents">
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<p>An implementation of hash table using <a href="https://en.wikipedia.org/wiki/Quadratic_probing" target="_blank">quadratic probing</a> algorithm.
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<a href="#details">More...</a></p>
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<table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-nested-classes" class="groupheader"><a id="nested-classes" name="nested-classes"></a>
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Classes</h2></td></tr>
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<tr class="memitem:Entry" id="r_Entry"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a></td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-typedef-members" class="groupheader"><a id="typedef-members" name="typedef-members"></a>
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Typedefs</h2></td></tr>
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<tr class="memitem:a1cb580b9c5ca2324784bd28040f2022d" id="r_a1cb580b9c5ca2324784bd28040f2022d"><td class="memItemLeft" align="right" valign="top">using </td><td class="memItemRight" valign="bottom"><a class="el" href="#a1cb580b9c5ca2324784bd28040f2022d">Entry</a> = struct Entry</td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-func-members" class="groupheader"><a id="func-members" name="func-members"></a>
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Functions</h2></td></tr>
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<tr class="memitem:adccc63a7e57cc6dba75bd62f40feb88b" id="r_adccc63a7e57cc6dba75bd62f40feb88b"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#adccc63a7e57cc6dba75bd62f40feb88b">putProber</a> (const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &entry, int key)</td></tr>
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<tr class="memitem:aeb6bca8db4768226f8ea8291ea4f83f6" id="r_aeb6bca8db4768226f8ea8291ea4f83f6"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#aeb6bca8db4768226f8ea8291ea4f83f6">searchingProber</a> (const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &entry, int key)</td></tr>
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<tr class="memitem:a00ebcc6d39653eccc26f8432efbfc8d9" id="r_a00ebcc6d39653eccc26f8432efbfc8d9"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#a00ebcc6d39653eccc26f8432efbfc8d9">add</a> (int key)</td></tr>
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<tr class="memitem:a2093d91dd3d377cf0a5c939e45dcefc7" id="r_a2093d91dd3d377cf0a5c939e45dcefc7"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a> (int key)</td></tr>
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<tr class="memitem:ab431981b54c0bae1b2956f716aee1dcf" id="r_ab431981b54c0bae1b2956f716aee1dcf"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a> (int key, bool searching)</td></tr>
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<tr class="memitem:a5ceee4128d92ca4412040b7104d1299d" id="r_a5ceee4128d92ca4412040b7104d1299d"><td class="memItemLeft" align="right" valign="top"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="#a5ceee4128d92ca4412040b7104d1299d">find</a> (int key)</td></tr>
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<tr class="memitem:a40d617ebf4d6ba21bcda8d8d1faa2357" id="r_a40d617ebf4d6ba21bcda8d8d1faa2357"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a> ()</td></tr>
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<tr class="memitem:ada6f1f44f7e83b0094fbcbe170788486" id="r_ada6f1f44f7e83b0094fbcbe170788486"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#ada6f1f44f7e83b0094fbcbe170788486">rehash</a> ()</td></tr>
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<tr class="memitem:a07a0467b24102260fbb6b554c453c20a" id="r_a07a0467b24102260fbb6b554c453c20a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#a07a0467b24102260fbb6b554c453c20a">remove</a> (int key)</td></tr>
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<tr class="memitem:a312143ed316d48978084c025ff8d9768" id="r_a312143ed316d48978084c025ff8d9768"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#a312143ed316d48978084c025ff8d9768">addInfo</a> (int key)</td></tr>
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<tr class="memitem:a69fe1f7c36fe004ba83eef2ca82e7e30" id="r_a69fe1f7c36fe004ba83eef2ca82e7e30"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="#a69fe1f7c36fe004ba83eef2ca82e7e30">removalInfo</a> (int key)</td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 id="header-var-members" class="groupheader"><a id="var-members" name="var-members"></a>
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Variables</h2></td></tr>
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<tr class="memitem:a90f9d8a71e3f148b65bcc0c1c8a49c70" id="r_a90f9d8a71e3f148b65bcc0c1c8a49c70"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a90f9d8a71e3f148b65bcc0c1c8a49c70">notPresent</a></td></tr>
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<tr class="memitem:a149e32e186c3fac390ffa81dd6c73147" id="r_a149e32e186c3fac390ffa81dd6c73147"><td class="memItemLeft" align="right" valign="top">std::vector< <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> > </td><td class="memItemRight" valign="bottom"><a class="el" href="#a149e32e186c3fac390ffa81dd6c73147">table</a></td></tr>
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<tr class="memitem:a2d5722a3b692eeb1b96615fba6a248f3" id="r_a2d5722a3b692eeb1b96615fba6a248f3"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a2d5722a3b692eeb1b96615fba6a248f3">totalSize</a></td></tr>
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<tr class="memitem:aaa4b6c021ba71ecdac8b23b45d55c774" id="r_aaa4b6c021ba71ecdac8b23b45d55c774"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#aaa4b6c021ba71ecdac8b23b45d55c774">tomb</a> = -1</td></tr>
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<tr class="memitem:a6c60d84648b0f7bf78789da196bcd2b3" id="r_a6c60d84648b0f7bf78789da196bcd2b3"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="#a6c60d84648b0f7bf78789da196bcd2b3">size</a></td></tr>
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<tr class="memitem:ad20bb8020424def88917e26979051fae" id="r_ad20bb8020424def88917e26979051fae"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="#ad20bb8020424def88917e26979051fae">rehashing</a></td></tr>
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</table>
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<a name="details" id="details"></a><h2 id="header-details" class="groupheader">Detailed Description</h2>
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<div class="textblock"><p>An implementation of hash table using <a href="https://en.wikipedia.org/wiki/Quadratic_probing" target="_blank">quadratic probing</a> algorithm. </p>
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</div><a name="doc-typedef-members" id="doc-typedef-members"></a><h2 id="header-doc-typedef-members" class="groupheader">Typedef Documentation</h2>
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<a id="a1cb580b9c5ca2324784bd28040f2022d" name="a1cb580b9c5ca2324784bd28040f2022d"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a1cb580b9c5ca2324784bd28040f2022d">◆ </a></span>Entry</h2>
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<div class="memitem">
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<div class="memproto">
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<table class="memname">
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<td class="memname">using quadratic_probing::Entry = struct Entry</td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00022">22</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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</div>
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</div>
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<a name="doc-func-members" id="doc-func-members"></a><h2 id="header-doc-func-members" class="groupheader">Function Documentation</h2>
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<a id="a00ebcc6d39653eccc26f8432efbfc8d9" name="a00ebcc6d39653eccc26f8432efbfc8d9"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a00ebcc6d39653eccc26f8432efbfc8d9">◆ </a></span>add()</h2>
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<td class="memname">void quadratic_probing::add </td>
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<td>(</td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
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<td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>Checks for load factor here </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>key value to hash and add to table </td></tr>
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</table>
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</dd>
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</dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00182">182</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 182</span> {</div>
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<div class="line"><span class="lineno"> 183</span> <span class="keywordtype">int</span> index = <a class="code hl_function" href="#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">false</span>);</div>
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<div class="line"><span class="lineno"> 184</span> table[index].key = key;</div>
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<div class="line"><span class="lineno"> 185</span> <span class="comment">// Load factor greater than 0.5 causes resizing</span></div>
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<div class="line"><span class="lineno"> 186</span> <span class="keywordflow">if</span> (++size / <span class="keyword">static_cast<</span><span class="keywordtype">double</span><span class="keyword">></span>(totalSize) >= 0.5) {</div>
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<div class="line"><span class="lineno"> 187</span> <a class="code hl_function" href="#ada6f1f44f7e83b0094fbcbe170788486">rehash</a>();</div>
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<div class="line"><span class="lineno"> 188</span> }</div>
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<div class="line"><span class="lineno"> 189</span>}</div>
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<div class="ttc" id="anamespacequadratic__probing_html_ab431981b54c0bae1b2956f716aee1dcf"><div class="ttname"><a href="#ab431981b54c0bae1b2956f716aee1dcf">quadratic_probing::quadraticProbe</a></div><div class="ttdeci">int quadraticProbe(int key, bool searching)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00056">quadratic_probing_hash_table.cpp:56</a></div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_ada6f1f44f7e83b0094fbcbe170788486"><div class="ttname"><a href="#ada6f1f44f7e83b0094fbcbe170788486">quadratic_probing::rehash</a></div><div class="ttdeci">void rehash()</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00160">quadratic_probing_hash_table.cpp:160</a></div></div>
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</div><!-- fragment -->
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</div>
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<a id="a312143ed316d48978084c025ff8d9768" name="a312143ed316d48978084c025ff8d9768"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a312143ed316d48978084c025ff8d9768">◆ </a></span>addInfo()</h2>
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<td class="memname">void quadratic_probing::addInfo </td>
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<td>(</td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
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<td></td>
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<p>Information about the adding process </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>key value to hash and add to table </td></tr>
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</table>
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</dd>
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</dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00207">207</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 207</span> {</div>
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<div class="line"><span class="lineno"> 208</span> std::cout << <span class="stringliteral">"Initial table: "</span>;</div>
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<div class="line"><span class="lineno"> 209</span> <a class="code hl_function" href="#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
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<div class="line"><span class="lineno"> 210</span> std::cout << std::endl;</div>
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<div class="line"><span class="lineno"> 211</span> std::cout << <span class="stringliteral">"hash of "</span> << key << <span class="stringliteral">" is "</span> << <a class="code hl_function" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) << <span class="stringliteral">" % "</span></div>
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<div class="line"><span class="lineno"> 212</span> << totalSize << <span class="stringliteral">" == "</span> << <a class="code hl_function" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) % totalSize;</div>
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<div class="line"><span class="lineno"> 213</span> std::cout << std::endl;</div>
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<div class="line"><span class="lineno"> 214</span> <a class="code hl_function" href="#a00ebcc6d39653eccc26f8432efbfc8d9">add</a>(key);</div>
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<div class="line"><span class="lineno"> 215</span> std::cout << <span class="stringliteral">"New table: "</span>;</div>
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<div class="line"><span class="lineno"> 216</span> <a class="code hl_function" href="#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
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<div class="line"><span class="lineno"> 217</span>}</div>
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<div class="ttc" id="anamespacequadratic__probing_html_a00ebcc6d39653eccc26f8432efbfc8d9"><div class="ttname"><a href="#a00ebcc6d39653eccc26f8432efbfc8d9">quadratic_probing::add</a></div><div class="ttdeci">void add(int key)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00182">quadratic_probing_hash_table.cpp:182</a></div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_a2093d91dd3d377cf0a5c939e45dcefc7"><div class="ttname"><a href="#a2093d91dd3d377cf0a5c939e45dcefc7">quadratic_probing::hashFxn</a></div><div class="ttdeci">size_t hashFxn(int key)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00046">quadratic_probing_hash_table.cpp:46</a></div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_a40d617ebf4d6ba21bcda8d8d1faa2357"><div class="ttname"><a href="#a40d617ebf4d6ba21bcda8d8d1faa2357">quadratic_probing::display</a></div><div class="ttdeci">void display()</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00142">quadratic_probing_hash_table.cpp:142</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a40d617ebf4d6ba21bcda8d8d1faa2357">◆ </a></span>display()</h2>
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<td class="memname">void quadratic_probing::display </td>
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<td>(</td>
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<p>Displays the table </p><dl class="section return"><dt>Returns</dt><dd>None </dd></dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00142">142</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 142</span> {</div>
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<div class="line"><span class="lineno"> 143</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < totalSize; i++) {</div>
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<div class="line"><span class="lineno"> 144</span> <span class="keywordflow">if</span> (table[i].key == notPresent) {</div>
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<div class="line"><span class="lineno"> 145</span> std::cout << <span class="stringliteral">" Empty "</span>;</div>
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<div class="line"><span class="lineno"> 146</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (table[i].key == tomb) {</div>
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<div class="line"><span class="lineno"> 147</span> std::cout << <span class="stringliteral">" Tomb "</span>;</div>
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<div class="line"><span class="lineno"> 148</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><span class="lineno"> 149</span> std::cout << <span class="stringliteral">" "</span>;</div>
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<div class="line"><span class="lineno"> 150</span> std::cout << table[i].key;</div>
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<div class="line"><span class="lineno"> 151</span> std::cout << <span class="stringliteral">" "</span>;</div>
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<div class="line"><span class="lineno"> 152</span> }</div>
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<div class="line"><span class="lineno"> 153</span> }</div>
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<div class="line"><span class="lineno"> 154</span> std::cout << std::endl;</div>
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<div class="line"><span class="lineno"> 155</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a5ceee4128d92ca4412040b7104d1299d">◆ </a></span>find()</h2>
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<td class="memname"><a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> quadratic_probing::find </td>
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<td>(</td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
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<p>Get the entry instance corresponding to a key </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>if present, the entry instance </dd>
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if not present, a new instance </dd></dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00131">131</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 131</span> {</div>
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<div class="line"><span class="lineno"> 132</span> <span class="keywordtype">int</span> index = <a class="code hl_function" href="#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">true</span>);</div>
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<div class="line"><span class="lineno"> 133</span> <span class="keywordflow">if</span> (index == notPresent) {</div>
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<div class="line"><span class="lineno"> 134</span> <span class="keywordflow">return</span> <a class="code hl_struct" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a>();</div>
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<div class="line"><span class="lineno"> 135</span> }</div>
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<div class="line"><span class="lineno"> 136</span> <span class="keywordflow">return</span> table[index];</div>
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<div class="line"><span class="lineno"> 137</span>}</div>
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<div class="ttc" id="astructquadratic__probing_1_1_entry_html"><div class="ttname"><a href="../../da/dd1/structquadratic__probing_1_1_entry.html">quadratic_probing::Entry</a></div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00037">quadratic_probing_hash_table.cpp:37</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a2093d91dd3d377cf0a5c939e45dcefc7">◆ </a></span>hashFxn()</h2>
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<td class="memname">size_t quadratic_probing::hashFxn </td>
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<td>(</td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
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<p>Hash a key </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>key value to hash </td></tr>
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</table>
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<dl class="section return"><dt>Returns</dt><dd>hash of the key </dd></dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00046">46</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 46</span> {</div>
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<div class="line"><span class="lineno"> 47</span> std::hash<int> hash;</div>
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<div class="line"><span class="lineno"> 48</span> <span class="keywordflow">return</span> hash(key);</div>
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<div class="line"><span class="lineno"> 49</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#adccc63a7e57cc6dba75bd62f40feb88b">◆ </a></span>putProber()</h2>
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<td class="memname">bool quadratic_probing::putProber </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &</td> <td class="paramname"><span class="paramname"><em>entry</em></span>, </td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span> )</td>
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<p>Finds empty spot </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">entry</td><td>Instance of table entry </td></tr>
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<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
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</table>
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<dl class="section return"><dt>Returns</dt><dd><span class="tt">true</span> if key is present </dd>
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<dd>
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<span class="tt">false</span> if key is absent </dd></dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00106">106</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 106</span> {</div>
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<div class="line"><span class="lineno"> 107</span> <span class="keywordflow">if</span> (entry.<a class="code hl_variable" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == notPresent || entry.<a class="code hl_variable" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == tomb) {</div>
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<div class="line"><span class="lineno"> 108</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 109</span> }</div>
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<div class="line"><span class="lineno"> 110</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><span class="lineno"> 111</span>}</div>
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<div class="ttc" id="astructquadratic__probing_1_1_entry_html_a75f72858f08a2fc8b94402de98db12d8"><div class="ttname"><a href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">quadratic_probing::Entry::key</a></div><div class="ttdeci">int key</div><div class="ttdoc">key value</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00039">quadratic_probing_hash_table.cpp:39</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ab431981b54c0bae1b2956f716aee1dcf">◆ </a></span>quadraticProbe()</h2>
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<td class="memname">int quadratic_probing::quadraticProbe </td>
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<td>(</td>
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<td class="paramtype">bool</td> <td class="paramname"><span class="paramname"><em>searching</em></span> )</td>
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<p>Performs quadratic probing to resolve collisions </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">key</td><td>key value to search/probe </td></tr>
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<tr><td class="paramname">searching</td><td><span class="tt">true</span> if only searching, <span class="tt">false1 if assigning
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00056">56</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 56</span> {</div>
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<div class="line"><span class="lineno"> 57</span> <span class="keywordtype">int</span> hash = <span class="keyword">static_cast<</span><span class="keywordtype">int</span><span class="keyword">></span>(<a class="code hl_function" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key));</div>
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<div class="line"><span class="lineno"> 58</span> <span class="keywordtype">int</span> i = 0;</div>
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<div class="line"><span class="lineno"> 59</span> <a class="code hl_struct" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> entry;</div>
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<div class="line"><span class="lineno"> 60</span> <span class="keywordflow">do</span> {</div>
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<div class="line"><span class="lineno"> 61</span> <span class="keywordtype">size_t</span> index =</div>
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<div class="line"><span class="lineno"> 62</span> (hash + <span class="keyword">static_cast<</span><span class="keywordtype">size_t</span><span class="keyword">></span>(std::round(std::pow(i, 2)))) %</div>
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<div class="line"><span class="lineno"> 63</span> totalSize;</div>
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<div class="line"><span class="lineno"> 64</span> entry = table[index];</div>
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<div class="line"><span class="lineno"> 65</span> <span class="keywordflow">if</span> (searching) {</div>
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<div class="line"><span class="lineno"> 66</span> <span class="keywordflow">if</span> (entry.<a class="code hl_variable" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> == notPresent) {</div>
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<div class="line"><span class="lineno"> 67</span> <span class="keywordflow">return</span> notPresent;</div>
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<div class="line"><span class="lineno"> 68</span> }</div>
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<div class="line"><span class="lineno"> 69</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="#aeb6bca8db4768226f8ea8291ea4f83f6">searchingProber</a>(entry, key)) {</div>
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<div class="line"><span class="lineno"> 70</span> std::cout << <span class="stringliteral">"Found key!"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 71</span> <span class="keywordflow">return</span> index;</div>
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<div class="line"><span class="lineno"> 72</span> }</div>
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<div class="line"><span class="lineno"> 73</span> std::cout << <span class="stringliteral">"Found tombstone or equal hash, checking next"</span></div>
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<div class="line"><span class="lineno"> 74</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 75</span> i++;</div>
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<div class="line"><span class="lineno"> 76</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><span class="lineno"> 77</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="#adccc63a7e57cc6dba75bd62f40feb88b">putProber</a>(entry, key)) {</div>
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<div class="line"><span class="lineno"> 78</span> <span class="keywordflow">if</span> (!rehashing) {</div>
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<div class="line"><span class="lineno"> 79</span> std::cout << <span class="stringliteral">"Spot found!"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 80</span> }</div>
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<div class="line"><span class="lineno"> 81</span> <span class="keywordflow">return</span> index;</div>
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<div class="line"><span class="lineno"> 82</span> }</div>
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<div class="line"><span class="lineno"> 83</span> <span class="keywordflow">if</span> (!rehashing) {</div>
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<div class="line"><span class="lineno"> 84</span> std::cout << <span class="stringliteral">"Spot taken, looking at next (next index = "</span></div>
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<div class="line"><span class="lineno"> 85</span> << (<a class="code hl_function" href="../../d5/d96/md5_8cpp.html#a88705fab5f92adf3427b4cf76ff33edb">hash</a> + <span class="keyword">static_cast<</span><span class="keywordtype">size_t</span><span class="keyword">></span>(</div>
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<div class="line"><span class="lineno"> 86</span> std::round(std::pow(i + 1, 2)))) %</div>
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<div class="line"><span class="lineno"> 87</span> totalSize</div>
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<div class="line"><span class="lineno"> 88</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 89</span> }</div>
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<div class="line"><span class="lineno"> 90</span> i++;</div>
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<div class="line"><span class="lineno"> 91</span> }</div>
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<div class="line"><span class="lineno"> 92</span> <span class="keywordflow">if</span> (i == totalSize * 100) {</div>
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<div class="line"><span class="lineno"> 93</span> std::cout << <span class="stringliteral">"Quadratic probe failed (infinite loop)"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 94</span> <span class="keywordflow">return</span> notPresent;</div>
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<div class="line"><span class="lineno"> 95</span> }</div>
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<div class="line"><span class="lineno"> 96</span> } <span class="keywordflow">while</span> (entry.<a class="code hl_variable" href="../../da/dd1/structquadratic__probing_1_1_entry.html#a75f72858f08a2fc8b94402de98db12d8">key</a> != notPresent);</div>
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<div class="line"><span class="lineno"> 97</span> <span class="keywordflow">return</span> notPresent;</div>
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<div class="line"><span class="lineno"> 98</span>}</div>
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<div class="ttc" id="amd5_8cpp_html_a88705fab5f92adf3427b4cf76ff33edb"><div class="ttname"><a href="../../d5/d96/md5_8cpp.html#a88705fab5f92adf3427b4cf76ff33edb">hashing::md5::hash</a></div><div class="ttdeci">void * hash(const std::string &message)</div><div class="ttdoc">Converts the string to bytestring and calls the main algorithm.</div><div class="ttdef"><b>Definition</b> <a href="../../d5/d96/md5_8cpp_source.html#l00288">md5.cpp:288</a></div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_adccc63a7e57cc6dba75bd62f40feb88b"><div class="ttname"><a href="#adccc63a7e57cc6dba75bd62f40feb88b">quadratic_probing::putProber</a></div><div class="ttdeci">bool putProber(const Entry &entry, int key)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00106">quadratic_probing_hash_table.cpp:106</a></div></div>
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<div class="ttc" id="anamespacequadratic__probing_html_aeb6bca8db4768226f8ea8291ea4f83f6"><div class="ttname"><a href="#aeb6bca8db4768226f8ea8291ea4f83f6">quadratic_probing::searchingProber</a></div><div class="ttdeci">bool searchingProber(const Entry &entry, int key)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00119">quadratic_probing_hash_table.cpp:119</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#ada6f1f44f7e83b0094fbcbe170788486">◆ </a></span>rehash()</h2>
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<td class="memname">void quadratic_probing::rehash </td>
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<td>(</td>
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<p>Rehashes the table into a bigger table </p><dl class="section return"><dt>Returns</dt><dd>none </dd></dl>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00160">160</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 160</span> {</div>
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<div class="line"><span class="lineno"> 161</span> <span class="comment">// Necessary so wall of add info isn't printed all at once</span></div>
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<div class="line"><span class="lineno"> 162</span> rehashing = <span class="keyword">true</span>;</div>
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<div class="line"><span class="lineno"> 163</span> <span class="keywordtype">int</span> oldSize = totalSize;</div>
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<div class="line"><span class="lineno"> 164</span> std::vector<Entry> oldTable(table);</div>
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<div class="line"><span class="lineno"> 165</span> <span class="comment">// Really this should use the next prime number greater than totalSize * 2</span></div>
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<div class="line"><span class="lineno"> 166</span> totalSize *= 2;</div>
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<div class="line"><span class="lineno"> 167</span> table = std::vector<Entry>(totalSize);</div>
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<div class="line"><span class="lineno"> 168</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < oldSize; i++) {</div>
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<div class="line"><span class="lineno"> 169</span> <span class="keywordflow">if</span> (oldTable[i].key != -1 && oldTable[i].key != notPresent) {</div>
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<div class="line"><span class="lineno"> 170</span> size--; <span class="comment">// Size stays the same (add increments size)</span></div>
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<div class="line"><span class="lineno"> 171</span> <a class="code hl_function" href="#a00ebcc6d39653eccc26f8432efbfc8d9">add</a>(oldTable[i].key);</div>
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<div class="line"><span class="lineno"> 172</span> }</div>
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<div class="line"><span class="lineno"> 173</span> }</div>
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<div class="line"><span class="lineno"> 174</span> <span class="comment">// delete[] oldTable;</span></div>
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<div class="line"><span class="lineno"> 175</span> rehashing = <span class="keyword">false</span>;</div>
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<div class="line"><span class="lineno"> 176</span> std::cout << <span class="stringliteral">"Table was rehashed, new size is: "</span> << totalSize << std::endl;</div>
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<div class="line"><span class="lineno"> 177</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#a69fe1f7c36fe004ba83eef2ca82e7e30">◆ </a></span>removalInfo()</h2>
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<td class="memname">void quadratic_probing::removalInfo </td>
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<td>(</td>
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<td class="paramtype">int</td> <td class="paramname"><span class="paramname"><em>key</em></span></td><td>)</td>
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<p>Information about removal process </p><dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">key</td><td>key value to hash and remove from table </td></tr>
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</table>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00222">222</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 222</span> {</div>
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<div class="line"><span class="lineno"> 223</span> std::cout << <span class="stringliteral">"Initial table: "</span>;</div>
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<div class="line"><span class="lineno"> 224</span> <a class="code hl_function" href="#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
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<div class="line"><span class="lineno"> 225</span> std::cout << std::endl;</div>
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<div class="line"><span class="lineno"> 226</span> std::cout << <span class="stringliteral">"hash of "</span> << key << <span class="stringliteral">" is "</span> << <a class="code hl_function" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) << <span class="stringliteral">" % "</span></div>
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<div class="line"><span class="lineno"> 227</span> << totalSize << <span class="stringliteral">" == "</span> << <a class="code hl_function" href="#a2093d91dd3d377cf0a5c939e45dcefc7">hashFxn</a>(key) % totalSize;</div>
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<div class="line"><span class="lineno"> 228</span> std::cout << std::endl;</div>
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<div class="line"><span class="lineno"> 229</span> <a class="code hl_function" href="#a07a0467b24102260fbb6b554c453c20a">remove</a>(key);</div>
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<div class="line"><span class="lineno"> 230</span> std::cout << <span class="stringliteral">"New table: "</span>;</div>
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<div class="line"><span class="lineno"> 231</span> <a class="code hl_function" href="#a40d617ebf4d6ba21bcda8d8d1faa2357">display</a>();</div>
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<div class="line"><span class="lineno"> 232</span>}</div>
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<div class="ttc" id="anamespacequadratic__probing_html_a07a0467b24102260fbb6b554c453c20a"><div class="ttname"><a href="#a07a0467b24102260fbb6b554c453c20a">quadratic_probing::remove</a></div><div class="ttdeci">void remove(int key)</div><div class="ttdef"><b>Definition</b> <a href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00194">quadratic_probing_hash_table.cpp:194</a></div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#a07a0467b24102260fbb6b554c453c20a">◆ </a></span>remove()</h2>
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<td class="memname">void quadratic_probing::remove </td>
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<p>Removes key. Leaves tombstone upon removal. </p><dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">key</td><td>key value to hash and remove from table </td></tr>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00194">194</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 194</span> {</div>
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<div class="line"><span class="lineno"> 195</span> <span class="keywordtype">int</span> index = <a class="code hl_function" href="#ab431981b54c0bae1b2956f716aee1dcf">quadraticProbe</a>(key, <span class="keyword">true</span>);</div>
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<div class="line"><span class="lineno"> 196</span> <span class="keywordflow">if</span> (index == notPresent) {</div>
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<div class="line"><span class="lineno"> 197</span> std::cout << <span class="stringliteral">"key not found"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 198</span> }</div>
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<div class="line"><span class="lineno"> 199</span> table[index].key = tomb;</div>
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<div class="line"><span class="lineno"> 200</span> std::cout << <span class="stringliteral">"Removal successful, leaving tombstone"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 201</span> size--;</div>
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<div class="line"><span class="lineno"> 202</span>}</div>
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<h2 class="memtitle"><span class="permalink"><a href="#aeb6bca8db4768226f8ea8291ea4f83f6">◆ </a></span>searchingProber()</h2>
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<td class="memname">bool quadratic_probing::searchingProber </td>
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<td>(</td>
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<td class="paramtype">const <a class="el" href="../../da/dd1/structquadratic__probing_1_1_entry.html">Entry</a> &</td> <td class="paramname"><span class="paramname"><em>entry</em></span>, </td>
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<p>Looks for a matching key </p><dl class="params"><dt>Parameters</dt><dd>
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<dl class="section return"><dt>Returns</dt><dd><span class="tt">true</span> if key matches the entry </dd>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00119">119</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<div class="fragment"><div class="line"><span class="lineno"> 119</span> {</div>
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<div class="line"><span class="lineno"> 122</span> }</div>
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<div class="line"><span class="lineno"> 123</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<a name="doc-var-members" id="doc-var-members"></a><h2 id="header-doc-var-members" class="groupheader">Variable Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a90f9d8a71e3f148b65bcc0c1c8a49c70">◆ </a></span>notPresent</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00028">28</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad20bb8020424def88917e26979051fae">◆ </a></span>rehashing</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00033">33</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<a id="a6c60d84648b0f7bf78789da196bcd2b3" name="a6c60d84648b0f7bf78789da196bcd2b3"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a6c60d84648b0f7bf78789da196bcd2b3">◆ </a></span>size</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00032">32</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#a149e32e186c3fac390ffa81dd6c73147">◆ </a></span>table</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00029">29</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<h2 class="memtitle"><span class="permalink"><a href="#aaa4b6c021ba71ecdac8b23b45d55c774">◆ </a></span>tomb</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00031">31</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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<a id="a2d5722a3b692eeb1b96615fba6a248f3" name="a2d5722a3b692eeb1b96615fba6a248f3"></a>
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<h2 class="memtitle"><span class="permalink"><a href="#a2d5722a3b692eeb1b96615fba6a248f3">◆ </a></span>totalSize</h2>
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<p class="definition">Definition at line <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html#l00030">30</a> of file <a class="el" href="../../db/d71/quadratic__probing__hash__table_8cpp_source.html">quadratic_probing_hash_table.cpp</a>.</p>
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