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Symbian3/Examples/guid-6013a680-57f9-415b-8851-c4fa63356636/hashtableexample_8cpp_source.html
author Dominic Pinkman <dominic.pinkman@nokia.com>
Fri, 13 Aug 2010 16:47:46 +0100
changeset 14 578be2adaf3e
parent 6 43e37759235e
permissions -rw-r--r--
Week 32 contribution of PDK documentation content. See release notes for details. Fixes bug Bug 3582
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
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<html xmlns="http://www.w3.org/1999/xhtml">
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<head>
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<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
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<title>TB9.2 Example Applications: examples/Base/HashTableExample/hashtableexample.cpp Source File</title>
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<link href="tabs.css" rel="stylesheet" type="text/css"/>
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<link href="doxygen.css" rel="stylesheet" type="text/css"/>
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</head>
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<body>
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<!-- Generated by Doxygen 1.6.2 -->
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<h1>examples/Base/HashTableExample/hashtableexample.cpp</h1><a href="hashtableexample_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright (c) 2007-2009 Nokia Corporation and/or its subsidiary(-ies).</span>
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<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
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<a name="l00003"></a>00003 <span class="comment">// This component and the accompanying materials are made available</span>
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<a name="l00004"></a>00004 <span class="comment">// under the terms of &quot;Eclipse Public License v1.0&quot;</span>
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<a name="l00005"></a>00005 <span class="comment">// which accompanies this distribution, and is available</span>
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<a name="l00006"></a>00006 <span class="comment">// at the URL &quot;http://www.eclipse.org/legal/epl-v10.html&quot;.</span>
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<a name="l00007"></a>00007 <span class="comment">//</span>
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<a name="l00008"></a>00008 <span class="comment">// Initial Contributors:</span>
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<a name="l00009"></a>00009 <span class="comment">// Nokia Corporation - initial contribution.</span>
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<a name="l00010"></a>00010 <span class="comment">//</span>
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<a name="l00011"></a>00011 <span class="comment">// Contributors:</span>
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<a name="l00012"></a>00012 <span class="comment">//</span>
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<a name="l00013"></a>00013 <span class="comment">// Description:</span>
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<a name="l00014"></a>00014 <span class="comment">// This example program demonstrates the use of hash table classes.</span>
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<a name="l00015"></a>00015 <span class="comment">//</span>
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<a name="l00016"></a>00016
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<a name="l00017"></a>00017
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<a name="l00018"></a>00018
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<a name="l00022"></a>00022 <span class="preprocessor">#include &quot;<a class="code" href="hashtableexample_8h.html">hashtableexample.h</a>&quot;</span>
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<a name="l00023"></a>00023 <span class="preprocessor">#include &lt;e32hashtab.h&gt;</span>
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<a name="l00024"></a>00024 <span class="preprocessor">#include &lt;e32math.h&gt;</span>
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<a name="l00025"></a>00025
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<a name="l00029"></a>00029 CHashTableExample::CHashTableExample()
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<a name="l00030"></a>00030         {
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<a name="l00031"></a>00031         }
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<a name="l00032"></a>00032
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<a name="l00033"></a>00033 <span class="keywordtype">void</span> CHashTableExample::ConstructL()
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<a name="l00034"></a>00034         {
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<a name="l00035"></a>00035         iConsole = <a class="code" href="class_c_hash_table_example.html#acf16d511ffe0f92724a2938659902ce8">Console::NewL</a>(KTitle, TSize(KConsFullScreen, KConsFullScreen));
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<a name="l00036"></a>00036         iConsole-&gt;Printf(KWelcome);
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<a name="l00037"></a>00037         iConsole-&gt;Printf(KPressAKeyMsg );
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<a name="l00038"></a>00038         iConsole-&gt;Getch();
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<a name="l00039"></a>00039         }
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<a name="l00040"></a>00040
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<a name="l00044"></a><a class="code" href="class_c_hash_table_example.html#a6bd4064e26fb1b4d23555aaf95445a87">00044</a> <a class="code" href="class_c_hash_table_example.html#a6bd4064e26fb1b4d23555aaf95445a87">CHashTableExample::~CHashTableExample</a>()
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<a name="l00045"></a>00045         {
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<a name="l00046"></a>00046         <span class="keyword">delete</span> iConsole;
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<a name="l00047"></a>00047         iPointerArray.ResetAndDestroy();
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<a name="l00048"></a>00048         }
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<a name="l00049"></a>00049
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<a name="l00055"></a><a class="code" href="class_c_hash_table_example.html#acf16d511ffe0f92724a2938659902ce8">00055</a> <a class="code" href="class_c_hash_table_example.html">CHashTableExample</a>* <a class="code" href="class_c_hash_table_example.html#acf16d511ffe0f92724a2938659902ce8">CHashTableExample::NewL</a>()
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<a name="l00056"></a>00056         {
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<a name="l00057"></a>00057         <a class="code" href="class_c_hash_table_example.html">CHashTableExample</a>* <span class="keyword">self</span>=<span class="keyword">new</span>(ELeave)<a class="code" href="class_c_hash_table_example.html">CHashTableExample</a>();
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<a name="l00058"></a>00058         CleanupStack::PushL(<span class="keyword">self</span>);
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<a name="l00059"></a>00059         <span class="keyword">self</span>-&gt;ConstructL();
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<a name="l00060"></a>00060         CleanupStack::Pop(<span class="keyword">self</span>);
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<a name="l00061"></a>00061         <span class="keywordflow">return</span> <span class="keyword">self</span>;
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<a name="l00062"></a>00062         }
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<a name="l00063"></a>00063
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<a name="l00068"></a><a class="code" href="class_c_hash_table_example.html#a9f45f193bd3d5827ec302510e210a4ab">00068</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a9f45f193bd3d5827ec302510e210a4ab">CHashTableExample::ConstructDefaultHashSet</a>()
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<a name="l00069"></a>00069         {
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<a name="l00070"></a>00070         <span class="comment">// Construct hash set using default hash and identity functions for integer</span>
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<a name="l00071"></a>00071         RHashSet&lt;TInt&gt; hashSetInt();
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<a name="l00072"></a>00072
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<a name="l00073"></a>00073         <span class="comment">// Construct hash set using default hash and identity functions for 8bit descriptor</span>
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<a name="l00074"></a>00074         RHashSet&lt;TDesC8&gt; hashSetDes8();
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<a name="l00075"></a>00075
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<a name="l00076"></a>00076         <span class="comment">// Construct hash set using default hash and identity functions for 16bit descriptor</span>
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<a name="l00077"></a>00077         RHashSet&lt;TDesC16&gt; hashSetDes16();
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<a name="l00078"></a>00078
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<a name="l00079"></a>00079         iConsole-&gt;Printf(KHashSet);
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<a name="l00080"></a>00080         iConsole-&gt;Printf(KConstruct);
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<a name="l00081"></a>00081         iConsole-&gt;Printf(KConstructDefaultHashSet);
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<a name="l00082"></a>00082         }
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<a name="l00083"></a>00083
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<a name="l00087"></a>00087 <span class="keyword">struct </span>TMyOwnObject
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<a name="l00088"></a>00088         {
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<a name="l00089"></a>00089         TInt iVar1;
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<a name="l00090"></a>00090         TInt iVar2;
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<a name="l00091"></a>00091         };
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<a name="l00092"></a>00092
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<a name="l00099"></a><a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">00099</a> TUint32 <a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">MyHashFunction</a>(<span class="keyword">const</span> TMyOwnObject&amp; aObject)
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<a name="l00100"></a>00100         {
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<a name="l00101"></a>00101         <span class="keywordflow">return</span>  DefaultHash::Integer(aObject.iVar1) + DefaultHash::Integer(aObject.iVar2 );
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<a name="l00102"></a>00102         }
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<a name="l00103"></a>00103
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<a name="l00111"></a><a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">00111</a> TBool <a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">MyIdentityFunction</a>(<span class="keyword">const</span> TMyOwnObject&amp; aObject1, <span class="keyword">const</span> TMyOwnObject&amp; aObject2)
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<a name="l00112"></a>00112         {
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<a name="l00113"></a>00113         <span class="keywordflow">return</span> aObject1.iVar1 == aObject2.iVar1 &amp;&amp; aObject1.iVar2 != aObject2.iVar2;
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<a name="l00114"></a>00114         }
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<a name="l00115"></a>00115
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<a name="l00120"></a><a class="code" href="class_c_hash_table_example.html#af0c455879cdb6f865a22fbf22bbff1d8">00120</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#af0c455879cdb6f865a22fbf22bbff1d8">CHashTableExample::ConstructOwnHashSet</a>()
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<a name="l00121"></a>00121         {
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<a name="l00122"></a>00122         <span class="comment">// Creates an object of custom hash function by using our created structure</span>
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<a name="l00123"></a>00123         THashFunction32&lt;TMyOwnObject&gt; ownHashFunction(<a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">MyHashFunction</a>);
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<a name="l00124"></a>00124
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<a name="l00125"></a>00125         <span class="comment">// Creates an object of identity function by using our created structure</span>
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<a name="l00126"></a>00126         TIdentityRelation&lt;TMyOwnObject&gt; ownIdentityFunction(<a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">MyIdentityFunction</a>);
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<a name="l00127"></a>00127
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<a name="l00128"></a>00128         <span class="comment">// Construct hash set by providing custom hash and identity function</span>
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<a name="l00129"></a>00129         RHashSet&lt;TMyOwnObject&gt; ownHashSet(ownHashFunction, ownIdentityFunction);
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<a name="l00130"></a>00130         iConsole-&gt;Printf(KConstructOwnHashSet);
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<a name="l00131"></a>00131         }
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<a name="l00132"></a>00132
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<a name="l00143"></a><a class="code" href="class_c_hash_table_example.html#aa0fb5a532b9e4fcc8e67da7acf7ac339">00143</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#aa0fb5a532b9e4fcc8e67da7acf7ac339">CHashTableExample::OperationsToHashSetL</a>()
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<a name="l00144"></a>00144         {
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<a name="l00145"></a>00145         <span class="comment">// Declare a const integer value for the initial item to be stored</span>
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<a name="l00146"></a>00146     <span class="keyword">const</span> TInt startItem=1;
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<a name="l00147"></a>00147
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<a name="l00148"></a>00148     <span class="comment">// Declare a const integer value for the last item to be stored     </span>
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<a name="l00149"></a>00149         <span class="keyword">const</span> TInt endItem=100;
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<a name="l00150"></a>00150         TInt itemToBeFound=120;
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<a name="l00151"></a>00151         TInt itemToBeRemoved=200;
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<a name="l00152"></a>00152         TInt64 items=1;
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<a name="l00153"></a>00153
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<a name="l00154"></a>00154         iConsole-&gt;Printf(KOperation);
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<a name="l00155"></a>00155
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<a name="l00156"></a>00156         <span class="comment">// Creates an object of hash set using the template class RHashSet </span>
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<a name="l00157"></a>00157         RHashSet&lt;TInt&gt; hashSet;
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<a name="l00158"></a>00158
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<a name="l00159"></a>00159         <span class="comment">// Push hash set on to the cleanup stack</span>
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<a name="l00160"></a>00160         CleanupClosePushL(hashSet);
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<a name="l00161"></a>00161
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<a name="l00162"></a>00162         <span class="comment">// Insert random items to hash set</span>
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<a name="l00163"></a>00163         <span class="keywordflow">for</span> (TInt i=startItem; i&lt;=endItem; ++i)
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<a name="l00164"></a>00164                 {
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<a name="l00165"></a>00165                 TInt res = Math::Rand(items);
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<a name="l00166"></a>00166                 hashSet.InsertL(res);
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<a name="l00167"></a>00167                 }
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<a name="l00168"></a>00168
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<a name="l00169"></a>00169         iConsole-&gt;Printf(KInsertItemsToHashSet);
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<a name="l00170"></a>00170
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<a name="l00171"></a>00171         <span class="comment">// Search the set for a specified item </span>
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<a name="l00172"></a>00172         TInt* result= hashSet.Find(itemToBeFound);
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<a name="l00173"></a>00173
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<a name="l00174"></a>00174         <span class="comment">// result is NULL if specified item is not found in the set</span>
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<a name="l00175"></a>00175         <span class="keywordflow">if</span>(result)
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<a name="l00176"></a>00176                 {
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<a name="l00177"></a>00177                 iConsole-&gt;Printf(KItemPresentInHashSet);
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<a name="l00178"></a>00178                 }
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<a name="l00179"></a>00179         <span class="keywordflow">else</span>
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<a name="l00180"></a>00180                 {
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<a name="l00181"></a>00181                 iConsole-&gt;Printf(KItemNotPresentInHashSet);
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<a name="l00182"></a>00182                 }
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<a name="l00183"></a>00183
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<a name="l00184"></a>00184         <span class="comment">// Creates an object of TIter to iterate over the elements of hash set</span>
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<a name="l00185"></a>00185         RHashSet&lt;TInt&gt;::TIter hashSetIter(hashSet);
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<a name="l00186"></a>00186
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<a name="l00187"></a>00187         <span class="comment">// Iterate over the items in the set</span>
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<a name="l00188"></a>00188         <span class="comment">// Creates an iterator object of type TIter</span>
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<a name="l00189"></a>00189         <span class="keywordflow">for</span> ( ; ;)
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<a name="l00190"></a>00190                 {
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<a name="l00191"></a>00191                 <span class="keyword">const</span> TInt* res = hashSetIter.Next();
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<a name="l00192"></a>00192
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<a name="l00193"></a>00193                 <span class="comment">// Next() moves the iterator to the next item and returns it</span>
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<a name="l00194"></a>00194                 <span class="comment">// Returns NULL if there are no more items </span>
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<a name="l00195"></a>00195                 <span class="keywordflow">if</span> (!res)
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<a name="l00196"></a>00196                         {
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<a name="l00197"></a>00197                         <span class="keywordflow">break</span>;
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<a name="l00198"></a>00198                         }
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<a name="l00199"></a>00199                 }
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<a name="l00200"></a>00200
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<a name="l00201"></a>00201         iConsole-&gt;Printf(KIterateItemsFromHashSet);
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<a name="l00202"></a>00202
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<a name="l00203"></a>00203         <span class="comment">// Remove an item from hash set</span>
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<a name="l00204"></a>00204         TInt res = hashSet.Remove(itemToBeRemoved);
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<a name="l00205"></a>00205         <span class="comment">// Check if the item was successfully removed</span>
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<a name="l00206"></a>00206         <span class="keywordflow">if</span>(res)
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<a name="l00207"></a>00207                 {
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<a name="l00208"></a>00208                 iConsole-&gt;Printf(KItemPresentInHashSet);
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<a name="l00209"></a>00209                 }
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<a name="l00210"></a>00210         <span class="keywordflow">else</span>
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<a name="l00211"></a>00211                 {
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<a name="l00212"></a>00212                 iConsole-&gt;Printf(KItemNotPresentInHashSet);
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<a name="l00213"></a>00213                 }
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<a name="l00214"></a>00214
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<a name="l00215"></a>00215         iConsole-&gt;Printf(KRemoveItemsFromHashSet);
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<a name="l00216"></a>00216
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<a name="l00217"></a>00217         <span class="comment">// Close and cleanup hash set</span>
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<a name="l00218"></a>00218         CleanupStack::PopAndDestroy(&amp;hashSet);
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<a name="l00219"></a>00219
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<a name="l00220"></a>00220         iConsole-&gt;Printf(KPressAKey);
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<a name="l00221"></a>00221         iConsole-&gt;Getch();
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<a name="l00222"></a>00222         }
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<a name="l00223"></a>00223
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<a name="l00228"></a><a class="code" href="class_c_hash_table_example.html#a5d812199c1ec12e9f4fb087881c7486e">00228</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a5d812199c1ec12e9f4fb087881c7486e">CHashTableExample::ConstructDefaultPtrHashSet</a>()
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<a name="l00229"></a>00229         {
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<a name="l00230"></a>00230         <span class="comment">// Construct hash set of pointers using default hash and identity functions for integer</span>
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<a name="l00231"></a>00231         RPtrHashSet&lt;TInt&gt; ptrHashSetInt();
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<a name="l00232"></a>00232
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<a name="l00233"></a>00233         <span class="comment">// Construct hash set of pointers using default hash and identity functions for 8bit descriptor</span>
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<a name="l00234"></a>00234         RPtrHashSet&lt;TDesC8&gt; ptrHashSetDes8();
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<a name="l00235"></a>00235
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<a name="l00236"></a>00236         <span class="comment">// Construct hash set of pointers using default hash and identity functions for 16bit descriptor</span>
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<a name="l00237"></a>00237         RPtrHashSet&lt;TDesC16&gt; ptrHashSetDes16();
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<a name="l00238"></a>00238
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<a name="l00239"></a>00239         iConsole-&gt;Printf(KPtrHashSet);
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<a name="l00240"></a>00240         iConsole-&gt;Printf(KConstruct);
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<a name="l00241"></a>00241         iConsole-&gt;Printf(KConstructDefaultPtrHashSet);
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<a name="l00242"></a>00242         }
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<a name="l00243"></a>00243
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<a name="l00248"></a><a class="code" href="class_c_hash_table_example.html#aa5ee720dec65ddad2526ec9f4ef9d83a">00248</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#aa5ee720dec65ddad2526ec9f4ef9d83a">CHashTableExample::ConstructOwnPtrHashSet</a>()
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<a name="l00249"></a>00249         {
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<a name="l00250"></a>00250         <span class="comment">// Creates an object of custom hash function by using our created structure</span>
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<a name="l00251"></a>00251         THashFunction32&lt;TMyOwnObject&gt; ownHashFunction(<a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">MyHashFunction</a>);
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<a name="l00252"></a>00252
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<a name="l00253"></a>00253         <span class="comment">// Creates an object of identity relation by using our created structure</span>
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<a name="l00254"></a>00254         TIdentityRelation&lt;TMyOwnObject&gt; ownIdentityFunction(<a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">MyIdentityFunction</a>);
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<a name="l00255"></a>00255
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<a name="l00256"></a>00256         <span class="comment">// Construct hash set of pointers by providing custom hash and identity functions</span>
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<a name="l00257"></a>00257         RPtrHashSet&lt;TMyOwnObject&gt; ownPtrHashSet(ownHashFunction, ownIdentityFunction);
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<a name="l00258"></a>00258         iConsole-&gt;Printf(KConstructOwnPtrHashSet);
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<a name="l00259"></a>00259         }
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<a name="l00260"></a>00260
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<a name="l00266"></a><a class="code" href="hashtableexample_8cpp.html#a842a2320b517c541434909df8fe2dbc2">00266</a> <span class="keywordtype">void</span> <a class="code" href="hashtableexample_8cpp.html#a842a2320b517c541434909df8fe2dbc2">FindNumberInWords</a>(<span class="keyword">const</span> TInt&amp; aNum, TDes&amp; aDes)
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<a name="l00267"></a>00267         {
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<a name="l00268"></a>00268         TInt number = aNum;
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<a name="l00269"></a>00269         <span class="keyword">const</span> TInt bufferSize=256;
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<a name="l00270"></a>00270         <span class="keyword">const</span> TText* numbers[] = {_S(<span class="stringliteral">&quot;zero&quot;</span>), _S(<span class="stringliteral">&quot;one&quot;</span>), _S(<span class="stringliteral">&quot;two&quot;</span>),_S(<span class="stringliteral">&quot;three&quot;</span>),_S(<span class="stringliteral">&quot;four&quot;</span>),_S(<span class="stringliteral">&quot;five&quot;</span>),_S(<span class="stringliteral">&quot;six&quot;</span>),_S(<span class="stringliteral">&quot;seven&quot;</span>),
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<a name="l00271"></a>00271                                                         _S(<span class="stringliteral">&quot;eight&quot;</span>),_S(<span class="stringliteral">&quot;nine&quot;</span>),_S(<span class="stringliteral">&quot;ten&quot;</span>),_S(<span class="stringliteral">&quot;eleven&quot;</span>),_S(<span class="stringliteral">&quot;twelve&quot;</span>),_S(<span class="stringliteral">&quot;thirteen&quot;</span>),
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<a name="l00272"></a>00272                                                         _S(<span class="stringliteral">&quot;fourteen&quot;</span>),_S(<span class="stringliteral">&quot;fifteen&quot;</span>), _S(<span class="stringliteral">&quot;sixteen&quot;</span>),_S( <span class="stringliteral">&quot;seventeen&quot;</span>),_S( <span class="stringliteral">&quot;eighteen&quot;</span>),
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<a name="l00273"></a>00273                                                         _S(<span class="stringliteral">&quot;nineteen&quot;</span>),_S( <span class="stringliteral">&quot;twenty&quot;</span>),_S( <span class="stringliteral">&quot;thirty&quot;</span>),_S( <span class="stringliteral">&quot;forty&quot;</span>),_S( <span class="stringliteral">&quot;fifty&quot;</span>),_S(<span class="stringliteral">&quot;sixty&quot;</span>),
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<a name="l00274"></a>00274                                                         _S(<span class="stringliteral">&quot;seventy&quot;</span>),_S( <span class="stringliteral">&quot;eighty&quot;</span>), _S(<span class="stringliteral">&quot;ninety&quot;</span>), _S(<span class="stringliteral">&quot;hundred&quot;</span>), _S(<span class="stringliteral">&quot;thousand&quot;</span>)  };
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<a name="l00275"></a>00275
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<a name="l00276"></a>00276         <span class="comment">// Converts the words if the number is less than 20</span>
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<a name="l00277"></a>00277         <span class="keywordflow">if</span> (number&lt;20)
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<a name="l00278"></a>00278                 {
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<a name="l00279"></a>00279                 aDes.Copy(reinterpret_cast&lt;const TUint16*&gt; (numbers[number]));
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<a name="l00280"></a>00280                 }
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<a name="l00281"></a>00281
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<a name="l00282"></a>00282         <span class="comment">// Converts the words if the number between 20 and 100 </span>
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<a name="l00283"></a>00283         <span class="keywordflow">if</span> (number&lt;100 &amp;&amp; number&gt;=20)
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<a name="l00284"></a>00284                 {
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<a name="l00285"></a>00285                 TInt tens = number/10;
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<a name="l00286"></a>00286                 TInt units = number%10;
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<a name="l00287"></a>00287                 aDes.Copy(reinterpret_cast&lt;const TUint16*&gt; (numbers[tens-2+20]));
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<a name="l00288"></a>00288                 <span class="keywordflow">if</span> (units)
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<a name="l00289"></a>00289                         {
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<a name="l00290"></a>00290                         aDes.Append(<span class="charliteral">&#39; &#39;</span>);
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<a name="l00291"></a>00291                         aDes.Append(TPtrC16(reinterpret_cast&lt;const TUint16*&gt; (numbers[units])));
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<a name="l00292"></a>00292                         }
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<a name="l00293"></a>00293                 }
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<a name="l00294"></a>00294
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<a name="l00295"></a>00295         <span class="comment">// Converts the words if the number is between 100 and 1000 </span>
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<a name="l00296"></a>00296         <span class="keywordflow">if</span> (number&lt;1000 &amp;&amp; number&gt;=100)
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<a name="l00297"></a>00297                 {
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<a name="l00298"></a>00298                 TInt hundreds = number/100;
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<a name="l00299"></a>00299                 aDes.Copy(reinterpret_cast&lt;const TUint16*&gt; (numbers[hundreds]));
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<a name="l00300"></a>00300                 aDes.Append(<span class="charliteral">&#39; &#39;</span>);
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<a name="l00301"></a>00301                 aDes.Append(TPtrC16(reinterpret_cast&lt;const TUint16*&gt; (numbers[28])));
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<a name="l00302"></a>00302                 number%=100;
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<a name="l00303"></a>00303                 <span class="keywordflow">if</span> (number)
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<a name="l00304"></a>00304                         {
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<a name="l00305"></a>00305                         TBuf&lt;bufferSize&gt; buf;
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<a name="l00306"></a>00306                         TDes&amp; des1= buf;
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<a name="l00307"></a>00307                         <a class="code" href="hashtableexample_8cpp.html#a842a2320b517c541434909df8fe2dbc2">FindNumberInWords</a>(number, des1);
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<a name="l00308"></a>00308                         aDes.Append(KAnd);
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<a name="l00309"></a>00309                         aDes+=des1;
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<a name="l00310"></a>00310                         }
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<a name="l00311"></a>00311                 }
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<a name="l00312"></a>00312
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<a name="l00313"></a>00313         <span class="comment">// Converts the words if the number is greater than or equal to 1000</span>
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<a name="l00314"></a>00314         <span class="keywordflow">if</span>(number&gt;=1000)
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<a name="l00315"></a>00315                 {
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<a name="l00316"></a>00316                 TInt hundreds = number/1000;
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<a name="l00317"></a>00317                 aDes.Copy(reinterpret_cast&lt;const TUint16*&gt; (numbers[hundreds]));
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<a name="l00318"></a>00318                 aDes.Append(<span class="charliteral">&#39; &#39;</span>);
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<a name="l00319"></a>00319                 aDes.Append(TPtrC16(reinterpret_cast&lt;const TUint16*&gt; (numbers[29])));
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<a name="l00320"></a>00320                 number%=1000;
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<a name="l00321"></a>00321                 <span class="keywordflow">if</span> (number)
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<a name="l00322"></a>00322                         {
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<a name="l00323"></a>00323                         TBuf&lt;bufferSize&gt; buf;
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<a name="l00324"></a>00324                         TDes&amp; des1= buf;
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<a name="l00325"></a>00325                         <a class="code" href="hashtableexample_8cpp.html#a842a2320b517c541434909df8fe2dbc2">FindNumberInWords</a>(number, des1);
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<a name="l00326"></a>00326                         aDes.Append(KAnd);
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<a name="l00327"></a>00327                         aDes+=des1;
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<a name="l00328"></a>00328                         }
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<a name="l00329"></a>00329                 }
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<a name="l00330"></a>00330         }
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<a name="l00331"></a>00331
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<a name="l00342"></a><a class="code" href="class_c_hash_table_example.html#ae386e8c189e8574d2e58e84b3e72d88a">00342</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#ae386e8c189e8574d2e58e84b3e72d88a">CHashTableExample::OperationsToPtrHashSetL</a>()
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<a name="l00343"></a>00343         {
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<a name="l00344"></a>00344         <span class="comment">//      </span>
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<a name="l00345"></a>00345         iConsole-&gt;Printf(KOperation);
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<a name="l00346"></a>00346
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<a name="l00347"></a>00347     <span class="comment">// First, set up some sample data to store in the hash</span>
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<a name="l00348"></a>00348     <span class="comment">// We&#39;re going to use strings for the numbers 0 to 1999 </span>
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<a name="l00349"></a>00349
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<a name="l00350"></a>00350         <span class="comment">// Populate a string array temporarily with the sample data</span>
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<a name="l00351"></a>00351         <span class="comment">// We&#39;ll use the array to populate the set, and later on use it also</span>
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<a name="l00352"></a>00352         <span class="comment">// to populate a map</span>
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<a name="l00353"></a>00353     <span class="keyword">const</span> TInt KMaxItem=1200;
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<a name="l00354"></a>00354     <span class="keyword">const</span> TInt KMaxBufferSize=256;
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<a name="l00355"></a>00355     TInt i=0;
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<a name="l00356"></a>00356         <span class="keywordflow">for</span> (i=0; i&lt;KMaxItem; ++i)
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<a name="l00357"></a>00357                 {
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<a name="l00358"></a>00358                 HBufC* hbuf = HBufC::NewLC(KMaxBufferSize);
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<a name="l00359"></a>00359                 TPtr buf = hbuf-&gt;Des();
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<a name="l00360"></a>00360                 <span class="comment">// FindNumberInWords gets a string representation of the specified integer</span>
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<a name="l00361"></a>00361                 <a class="code" href="hashtableexample_8cpp.html#a842a2320b517c541434909df8fe2dbc2">FindNumberInWords</a>(i, buf);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   301
 
<a name="l00362"></a>00362                 iPointerArray.AppendL(hbuf);
43e37759235e Week 12 contribution of example code"
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   302
 
<a name="l00363"></a>00363                 CleanupStack::Pop(hbuf);
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<a name="l00364"></a>00364                 }
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   304
 
<a name="l00365"></a>00365
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<a name="l00366"></a>00366         <span class="comment">// Now create a set and populate it with the data from the array</span>
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   306
 
<a name="l00367"></a>00367
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   307
 
<a name="l00368"></a>00368         <span class="comment">// Creates an object of hash set of pointers for 16 bit data using the template class RPtrHashSet</span>
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<a name="l00369"></a>00369         RPtrHashSet&lt;TDesC16&gt; ptrHashSet;
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   309
 
<a name="l00370"></a>00370         <span class="comment">// Push hash set of pointers on to the cleanup stack</span>
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   310
 
<a name="l00371"></a>00371         CleanupClosePushL(ptrHashSet);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   311
 
<a name="l00372"></a>00372         <span class="comment">// Insert items to hash set of pointers from 16 bit descriptor array</span>
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   312
 
<a name="l00373"></a>00373         <span class="keywordflow">for</span> (i=0; i&lt;KMaxItem; ++i)
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   313
 
<a name="l00374"></a>00374                 {
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   314
 
<a name="l00375"></a>00375                 ptrHashSet.InsertL(iPointerArray[i]);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   315
 
<a name="l00376"></a>00376                 }
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diff changeset 
   316
 
<a name="l00377"></a>00377         iConsole-&gt;Printf(KInsertItemsToPtrHashSet);
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diff changeset 
   317
 
<a name="l00378"></a>00378
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   318
 
<a name="l00379"></a>00379         <span class="comment">// Search the set for a specified item </span>
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   319
 
<a name="l00380"></a>00380         TDesC16* item1 = ptrHashSet.Find(KFindItem);
43e37759235e Week 12 contribution of example code"
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   320
 
<a name="l00381"></a>00381         <span class="comment">// item1 is NULL if KFindItem is not found in the set</span>
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   321
 
<a name="l00382"></a>00382         <span class="keywordflow">if</span> (item1)
43e37759235e Week 12 contribution of example code"
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diff changeset 
   322
 
<a name="l00383"></a>00383                 {
43e37759235e Week 12 contribution of example code"
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   323
 
<a name="l00384"></a>00384                 iConsole-&gt;Printf(KItemPresentInPtrHashSet);
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diff changeset 
   324
 
<a name="l00385"></a>00385                 }
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   325
 
<a name="l00386"></a>00386         <span class="keywordflow">else</span>
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diff changeset 
   326
 
<a name="l00387"></a>00387                 {
43e37759235e Week 12 contribution of example code"
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   327
 
<a name="l00388"></a>00388                 iConsole-&gt;Printf(KItemNotPresentInPtrHashSet);
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diff changeset 
   328
 
<a name="l00389"></a>00389                 }
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diff changeset 
   329
 
<a name="l00390"></a>00390
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   330
 
<a name="l00391"></a>00391         <span class="comment">// Iterate over the items in the set</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   331
 
<a name="l00392"></a>00392         <span class="comment">// Creates an iterator object of type TIter</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   332
 
<a name="l00393"></a>00393         RPtrHashSet&lt;TDesC16&gt;::TIter ptrHashSetIter(ptrHashSet);
43e37759235e Week 12 contribution of example code"
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   333
 
<a name="l00394"></a>00394         <span class="comment">// Loop through the items </span>
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   334
 
<a name="l00395"></a>00395         <span class="keywordflow">for</span> ( ; ; )
43e37759235e Week 12 contribution of example code"
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diff changeset 
   335
 
<a name="l00396"></a>00396                 {
43e37759235e Week 12 contribution of example code"
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   336
 
<a name="l00397"></a>00397                 <span class="keyword">const</span> TDesC16* resNext = ptrHashSetIter.Next();
43e37759235e Week 12 contribution of example code"
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   337
 
<a name="l00398"></a>00398                 <span class="comment">// Next() moves the iterator to the next item and returns it</span>
43e37759235e Week 12 contribution of example code"
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   338
 
<a name="l00399"></a>00399                 <span class="comment">// Returns NULL if there are no more items  </span>
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<a name="l00400"></a>00400                 <span class="keywordflow">if</span> (!resNext)
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   340
 
<a name="l00401"></a>00401                         {
43e37759235e Week 12 contribution of example code"
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   341
 
<a name="l00402"></a>00402                         <span class="keywordflow">break</span>;
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   342
 
<a name="l00403"></a>00403                         }
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diff changeset 
   343
 
<a name="l00404"></a>00404                 }
43e37759235e Week 12 contribution of example code"
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diff changeset 
   344
 
<a name="l00405"></a>00405         iConsole-&gt;Printf(KIterateItemsFromPtrHashSet);
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diff changeset 
   345
 
<a name="l00406"></a>00406
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diff changeset 
   346
 
<a name="l00407"></a>00407         <span class="comment">// Remove an item from hash set</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   347
 
<a name="l00408"></a>00408         TInt err = ptrHashSet.Remove(&amp;KRemoveItem);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   348
 
<a name="l00409"></a>00409         <span class="comment">// Check if the item was successfully removed</span>
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diff changeset 
   349
 
<a name="l00410"></a>00410         <span class="keywordflow">if</span> (err == KErrNone)
43e37759235e Week 12 contribution of example code"
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diff changeset 
   350
 
<a name="l00411"></a>00411                 {
43e37759235e Week 12 contribution of example code"
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diff changeset 
   351
 
<a name="l00412"></a>00412                 iConsole-&gt;Printf(KItemPresentInPtrHashSet);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   352
 
<a name="l00413"></a>00413                 }
43e37759235e Week 12 contribution of example code"
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diff changeset 
   353
 
<a name="l00414"></a>00414         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   354
 
<a name="l00415"></a>00415                 {
43e37759235e Week 12 contribution of example code"
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diff changeset 
   355
 
<a name="l00416"></a>00416                 iConsole-&gt;Printf(KItemNotPresentInPtrHashSet);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   356
 
<a name="l00417"></a>00417                 }
43e37759235e Week 12 contribution of example code"
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diff changeset 
   357
 
<a name="l00418"></a>00418         iConsole-&gt;Printf(KRemoveItemsFromPtrHashSet);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   358
 
<a name="l00419"></a>00419
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diff changeset 
   359
 
<a name="l00420"></a>00420         <span class="comment">// Close and cleanup hash set of pointers</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   360
 
<a name="l00421"></a>00421         CleanupStack::PopAndDestroy(&amp;ptrHashSet);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   361
 
<a name="l00422"></a>00422
43e37759235e Week 12 contribution of example code"
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diff changeset 
   362
 
<a name="l00423"></a>00423         iConsole-&gt;Printf(KPressAKey);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   363
 
<a name="l00424"></a>00424         iConsole-&gt;Getch();
43e37759235e Week 12 contribution of example code"
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diff changeset 
   364
 
<a name="l00425"></a>00425         }
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   365
 
<a name="l00426"></a>00426
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diff changeset 
   366
 
<a name="l00431"></a><a class="code" href="class_c_hash_table_example.html#aa5cab6d3367986e74c7751ad7ffbff56">00431</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#aa5cab6d3367986e74c7751ad7ffbff56">CHashTableExample::ConstructDefaultHashMap</a>()
43e37759235e Week 12 contribution of example code"
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diff changeset 
   367
 
<a name="l00432"></a>00432         {
43e37759235e Week 12 contribution of example code"
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diff changeset 
   368
 
<a name="l00433"></a>00433         <span class="comment">// Construct hash map using default hash and identity functions for integer</span>
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   369
 
<a name="l00434"></a>00434         RHashMap&lt;TInt, TInt&gt; hashMapInt();
43e37759235e Week 12 contribution of example code"
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diff changeset 
   370
 
<a name="l00435"></a>00435
43e37759235e Week 12 contribution of example code"
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diff changeset 
   371
 
<a name="l00436"></a>00436         <span class="comment">// Construct hash map using default hash and identity functions for 8 bit descriptor</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   372
 
<a name="l00437"></a>00437         RHashMap&lt;TDesC8, TDesC8&gt; hashMapDes8();
43e37759235e Week 12 contribution of example code"
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diff changeset 
   373
 
<a name="l00438"></a>00438
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diff changeset 
   374
 
<a name="l00439"></a>00439         <span class="comment">// Construct hash map using default hash and identity functions for 16bit descriptor</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   375
 
<a name="l00440"></a>00440         RHashMap&lt;TDesC16, TDesC16&gt; hashMapDes16();
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diff changeset 
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<a name="l00441"></a>00441
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diff changeset 
   377
 
<a name="l00442"></a>00442         iConsole-&gt;Printf(KHashMap);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   378
 
<a name="l00443"></a>00443         iConsole-&gt;Printf(KConstruct);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   379
 
<a name="l00444"></a>00444         iConsole-&gt;Printf(KConstructDeafultHashMap);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   380
 
<a name="l00445"></a>00445         }
43e37759235e Week 12 contribution of example code"
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diff changeset 
   381
 
<a name="l00446"></a>00446
43e37759235e Week 12 contribution of example code"
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diff changeset 
   382
 
<a name="l00451"></a><a class="code" href="class_c_hash_table_example.html#a3eb16d70e743b00df2392d58ce36d906">00451</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a3eb16d70e743b00df2392d58ce36d906">CHashTableExample::ConstructOwnHashMap</a>()
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   383
 
<a name="l00452"></a>00452         {
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   384
 
<a name="l00453"></a>00453         <span class="comment">// Creates an object of custom hash function by using our created structure</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   385
 
<a name="l00454"></a>00454         THashFunction32&lt;TMyOwnObject&gt; ownHashFunction(<a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">MyHashFunction</a>);
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   386
 
<a name="l00455"></a>00455
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parents:
diff changeset 
   387
 
<a name="l00456"></a>00456         <span class="comment">// Creates an object of identity function by using our created structure</span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   388
 
<a name="l00457"></a>00457         TIdentityRelation&lt;TMyOwnObject&gt; ownIdentityFunction(<a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">MyIdentityFunction</a>);
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   389
 
<a name="l00458"></a>00458
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   390
 
<a name="l00459"></a>00459         <span class="comment">// Construct hash map by providing custom hash and identity function    </span>
43e37759235e Week 12 contribution of example code"
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diff changeset 
   391
 
<a name="l00460"></a>00460         RHashMap&lt;TMyOwnObject, TMyOwnObject&gt; ownHashMap(ownHashFunction, ownIdentityFunction);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   392
 
<a name="l00461"></a>00461         iConsole-&gt;Printf(KConstructOwnHashMap);
43e37759235e Week 12 contribution of example code"
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diff changeset 
   393
 
<a name="l00462"></a>00462         }
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   394
 
<a name="l00463"></a>00463
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diff changeset 
   395
 
<a name="l00474"></a><a class="code" href="class_c_hash_table_example.html#a44a2596c976b9bf32231603e74453f38">00474</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a44a2596c976b9bf32231603e74453f38">CHashTableExample::OperationsToHashMapL</a>()
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   396
 
<a name="l00475"></a>00475         {
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   397
 
<a name="l00476"></a>00476         TInt maxItem=300;
43e37759235e Week 12 contribution of example code"
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diff changeset 
   398
 
<a name="l00477"></a>00477         TInt itemToBeFound=150;
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   399
 
<a name="l00478"></a>00478         TInt itemToBeRemoved=200;
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   400
 
<a name="l00479"></a>00479         TInt64 items;
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   401
 
<a name="l00480"></a>00480
43e37759235e Week 12 contribution of example code"
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parents:
diff changeset 
   402
 
<a name="l00481"></a>00481         iConsole-&gt;Printf(KOperation);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   403
 
<a name="l00482"></a>00482
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   404
 
<a name="l00483"></a>00483         <span class="comment">// Creates an object of hash map using the template class RHashMap</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   405
 
<a name="l00484"></a>00484         RHashMap&lt;TInt, TInt&gt; hashMap;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   406
 
<a name="l00485"></a>00485
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   407
 
<a name="l00486"></a>00486         <span class="comment">// Push hash map on to the cleanup stack</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   408
 
<a name="l00487"></a>00487         CleanupClosePushL(hashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   409
 
<a name="l00488"></a>00488
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   410
 
<a name="l00489"></a>00489         <span class="comment">// Insert items to hash map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   411
 
<a name="l00490"></a>00490         <span class="keywordflow">for</span> (TInt i=0; i&lt;maxItem; i++)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   412
 
<a name="l00491"></a>00491                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   413
 
<a name="l00492"></a>00492                 TInt res = Math::Rand(items);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   414
 
<a name="l00493"></a>00493                 hashMap.InsertL(res*res, res);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   415
 
<a name="l00494"></a>00494                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   416
 
<a name="l00495"></a>00495
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   417
 
<a name="l00496"></a>00496         iConsole-&gt;Printf(KInsertItemsToHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   418
 
<a name="l00497"></a>00497
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   419
 
<a name="l00498"></a>00498         <span class="comment">// Search the map for a specified item</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   420
 
<a name="l00499"></a>00499         TInt* result= hashMap.Find(itemToBeFound);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   421
 
<a name="l00500"></a>00500
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   422
 
<a name="l00501"></a>00501         <span class="comment">// result is NULL if specified item is not found in the map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   423
 
<a name="l00502"></a>00502         <span class="keywordflow">if</span>(result)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   424
 
<a name="l00503"></a>00503                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   425
 
<a name="l00504"></a>00504                 iConsole-&gt;Printf(KItemPresentInHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   426
 
<a name="l00505"></a>00505                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   427
 
<a name="l00506"></a>00506         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   428
 
<a name="l00507"></a>00507                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   429
 
<a name="l00508"></a>00508                 iConsole-&gt;Printf(KItemNotPresentInHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   430
 
<a name="l00509"></a>00509                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   431
 
<a name="l00510"></a>00510
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   432
 
<a name="l00511"></a>00511         <span class="comment">// Iterate over the items in the map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   433
 
<a name="l00512"></a>00512         <span class="comment">// Creates an iterator object of type TIter</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   434
 
<a name="l00513"></a>00513         RHashMap&lt;TInt, TInt&gt;::TIter hashMapIter(hashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   435
 
<a name="l00514"></a>00514
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   436
 
<a name="l00515"></a>00515         <span class="keywordflow">for</span> ( ; ; )
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   437
 
<a name="l00516"></a>00516                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   438
 
<a name="l00517"></a>00517                 <span class="keyword">const</span> TInt* resNext = hashMapIter.NextKey();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   439
 
<a name="l00518"></a>00518                 <span class="keywordflow">if</span> (!resNext)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   440
 
<a name="l00519"></a>00519                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   441
 
<a name="l00520"></a>00520                         <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   442
 
<a name="l00521"></a>00521                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   443
 
<a name="l00522"></a>00522                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   444
 
<a name="l00523"></a>00523
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   445
 
<a name="l00524"></a>00524         iConsole-&gt;Printf(KIterateItemsFromHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   446
 
<a name="l00525"></a>00525
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   447
 
<a name="l00526"></a>00526         <span class="comment">// Remove an item from hash map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   448
 
<a name="l00527"></a>00527         TInt res = hashMap.Remove(itemToBeRemoved);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   449
 
<a name="l00528"></a>00528
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   450
 
<a name="l00529"></a>00529         <span class="comment">// Check if the item was successfully removed</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   451
 
<a name="l00530"></a>00530         <span class="keywordflow">if</span>(res)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   452
 
<a name="l00531"></a>00531                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   453
 
<a name="l00532"></a>00532                 iConsole-&gt;Printf(KItemPresentInHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   454
 
<a name="l00533"></a>00533                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   455
 
<a name="l00534"></a>00534         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   456
 
<a name="l00535"></a>00535                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   457
 
<a name="l00536"></a>00536                 iConsole-&gt;Printf(KItemNotPresentInHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   458
 
<a name="l00537"></a>00537                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   459
 
<a name="l00538"></a>00538
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   460
 
<a name="l00539"></a>00539         iConsole-&gt;Printf(KRemoveItemsFromHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   461
 
<a name="l00540"></a>00540
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   462
 
<a name="l00541"></a>00541         <span class="comment">// Close and cleanup hash map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   463
 
<a name="l00542"></a>00542         CleanupStack::PopAndDestroy(&amp;hashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   464
 
<a name="l00543"></a>00543
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   465
 
<a name="l00544"></a>00544         iConsole-&gt;Printf(KPressAKey);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   466
 
<a name="l00545"></a>00545         iConsole-&gt;Getch();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   467
 
<a name="l00546"></a>00546         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   468
 
<a name="l00547"></a>00547
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   469
 
<a name="l00552"></a><a class="code" href="class_c_hash_table_example.html#a002b4a538fbbfcb250b5b6b0553559a4">00552</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a002b4a538fbbfcb250b5b6b0553559a4">CHashTableExample::ConstructDefaultPtrHashMap</a>()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   470
 
<a name="l00553"></a>00553         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   471
 
<a name="l00554"></a>00554         <span class="comment">// Construct hash map of pointers using default hash and identity functions for integer</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   472
 
<a name="l00555"></a>00555         RPtrHashMap&lt;TInt, TInt&gt; ptrHashMapInt();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   473
 
<a name="l00556"></a>00556
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   474
 
<a name="l00557"></a>00557         <span class="comment">// Construct hash map of pointers using default hash and identity functions for 8bit descriptor</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   475
 
<a name="l00558"></a>00558         RPtrHashMap&lt;TDesC8, TDesC8&gt; ptrHashMapDes8();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   476
 
<a name="l00559"></a>00559
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   477
 
<a name="l00560"></a>00560         <span class="comment">// Construct hash map of pointers using default hash and identity functions for 16bit descriptor</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   478
 
<a name="l00561"></a>00561         RPtrHashMap&lt;TDesC16, TDesC16&gt; ptrHashMapDes16();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   479
 
<a name="l00562"></a>00562
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   480
 
<a name="l00563"></a>00563         iConsole-&gt;Printf(KPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   481
 
<a name="l00564"></a>00564         iConsole-&gt;Printf(KConstruct);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   482
 
<a name="l00565"></a>00565         iConsole-&gt;Printf(KConstructDeafultPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   483
 
<a name="l00566"></a>00566         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   484
 
<a name="l00567"></a>00567
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   485
 
<a name="l00572"></a><a class="code" href="class_c_hash_table_example.html#a88d7ae0091bd0fa4682736db79c88975">00572</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a88d7ae0091bd0fa4682736db79c88975">CHashTableExample::ConstructOwnPtrHashMap</a>()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   486
 
<a name="l00573"></a>00573         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   487
 
<a name="l00574"></a>00574         <span class="comment">// Creates an object of custom hash function by using our created structure</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   488
 
<a name="l00575"></a>00575         THashFunction32&lt;TMyOwnObject&gt; ownHashFunction(<a class="code" href="hashtableexample_8cpp.html#af116fb9d6e7d2da4bc1190cc359bacb7">MyHashFunction</a>);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   489
 
<a name="l00576"></a>00576
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   490
 
<a name="l00577"></a>00577         <span class="comment">// Creates an object of identity function by using our created structure</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   491
 
<a name="l00578"></a>00578         TIdentityRelation&lt;TMyOwnObject&gt; ownIdentityFunction(<a class="code" href="hashtableexample_8cpp.html#acbe0e70da9a3bb5c887d39c02af66258">MyIdentityFunction</a>);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   492
 
<a name="l00579"></a>00579
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   493
 
<a name="l00580"></a>00580         <span class="comment">// Construct hash map of pointers by providing custom hash and identity function</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   494
 
<a name="l00581"></a>00581         RPtrHashMap&lt;TMyOwnObject, TMyOwnObject&gt; ownPtrHashMap(ownHashFunction, ownIdentityFunction);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   495
 
<a name="l00582"></a>00582         iConsole-&gt;Printf(KConstructOwnPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   496
 
<a name="l00583"></a>00583         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   497
 
<a name="l00584"></a>00584
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   498
 
<a name="l00595"></a><a class="code" href="class_c_hash_table_example.html#a3c2f6d5cdfd1b1f2ac2074fab48ca98a">00595</a> <span class="keywordtype">void</span> <a class="code" href="class_c_hash_table_example.html#a3c2f6d5cdfd1b1f2ac2074fab48ca98a">CHashTableExample::OperationsToPtrHashMapL</a>()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   499
 
<a name="l00596"></a>00596         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   500
 
<a name="l00597"></a>00597         TInt i;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   501
 
<a name="l00598"></a>00598         TInt maxItem=200;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   502
 
<a name="l00599"></a>00599
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   503
 
<a name="l00600"></a>00600         iConsole-&gt;Printf(KOperation);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   504
 
<a name="l00601"></a>00601
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   505
 
<a name="l00602"></a>00602         <span class="comment">// Creates an object of hash map of pointers using the template class RPtrHashMap</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   506
 
<a name="l00603"></a>00603         RPtrHashMap&lt;TDesC16, TDesC16&gt; ptrHashMap;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   507
 
<a name="l00604"></a>00604
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   508
 
<a name="l00605"></a>00605         <span class="comment">// Push hash map of pointers on to the cleanup stack</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   509
 
<a name="l00606"></a>00606         CleanupClosePushL(ptrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   510
 
<a name="l00607"></a>00607
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   511
 
<a name="l00608"></a>00608         <span class="comment">// Insert items to hash map of pointers </span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   512
 
<a name="l00609"></a>00609         <span class="keywordflow">for</span> (i=0; i&lt;maxItem; ++i)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   513
 
<a name="l00610"></a>00610                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   514
 
<a name="l00611"></a>00611             ptrHashMap.InsertL(iPointerArray[i], iPointerArray[i+1]);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   515
 
<a name="l00612"></a>00612                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   516
 
<a name="l00613"></a>00613
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   517
 
<a name="l00614"></a>00614         iConsole-&gt;Printf(KInsertItemsToPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   518
 
<a name="l00615"></a>00615
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   519
 
<a name="l00616"></a>00616         <span class="comment">// Search the set for a specified item </span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   520
 
<a name="l00617"></a>00617         TDesC16* item1= ptrHashMap.Find(KFindItem);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   521
 
<a name="l00618"></a>00618
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   522
 
<a name="l00619"></a>00619         <span class="comment">// item1 is NULL if KFindItem is not found in the map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   523
 
<a name="l00620"></a>00620         <span class="keywordflow">if</span>(item1)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   524
 
<a name="l00621"></a>00621                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   525
 
<a name="l00622"></a>00622                 iConsole-&gt;Printf(KItemPresentInPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   526
 
<a name="l00623"></a>00623                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   527
 
<a name="l00624"></a>00624         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   528
 
<a name="l00625"></a>00625                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   529
 
<a name="l00626"></a>00626                 iConsole-&gt;Printf(KItemNotPresentInPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   530
 
<a name="l00627"></a>00627                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   531
 
<a name="l00628"></a>00628
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   532
 
<a name="l00629"></a>00629         <span class="comment">// Iterate over the items in the map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   533
 
<a name="l00630"></a>00630         <span class="comment">// Creates an iterator object of type TIter</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   534
 
<a name="l00631"></a>00631         RPtrHashMap&lt;TDesC16, TDesC16&gt;::TIter ptrHashMapIter(ptrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   535
 
<a name="l00632"></a>00632
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   536
 
<a name="l00633"></a>00633         <span class="keywordflow">for</span> ( ; ; )
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   537
 
<a name="l00634"></a>00634                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   538
 
<a name="l00635"></a>00635                 <span class="keyword">const</span> TDesC16* resNext = ptrHashMapIter.NextKey();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   539
 
<a name="l00636"></a>00636                 <span class="comment">// Next() moves the iterator to the next item and returns it</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   540
 
<a name="l00637"></a>00637                 <span class="comment">// Returns NULL if there are no more items </span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   541
 
<a name="l00638"></a>00638                 <span class="keywordflow">if</span> (!resNext)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   542
 
<a name="l00639"></a>00639                         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   543
 
<a name="l00640"></a>00640                         <span class="keywordflow">break</span>;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   544
 
<a name="l00641"></a>00641                         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   545
 
<a name="l00642"></a>00642                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   546
 
<a name="l00643"></a>00643
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   547
 
<a name="l00644"></a>00644         iConsole-&gt;Printf(KIterateItemsFromPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   548
 
<a name="l00645"></a>00645
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   549
 
<a name="l00646"></a>00646         <span class="comment">// Remove an item from hash map of pointers </span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   550
 
<a name="l00647"></a>00647     TInt res = ptrHashMap.Remove(&amp;KRemoveItem);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   551
 
<a name="l00648"></a>00648
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   552
 
<a name="l00649"></a>00649     <span class="comment">// Check if the item was successfully removed</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   553
 
<a name="l00650"></a>00650         <span class="keywordflow">if</span>(res)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   554
 
<a name="l00651"></a>00651                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   555
 
<a name="l00652"></a>00652                 iConsole-&gt;Printf(KItemPresentInPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   556
 
<a name="l00653"></a>00653                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   557
 
<a name="l00654"></a>00654         <span class="keywordflow">else</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   558
 
<a name="l00655"></a>00655                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   559
 
<a name="l00656"></a>00656                 iConsole-&gt;Printf(KItemNotPresentInPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   560
 
<a name="l00657"></a>00657                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   561
 
<a name="l00658"></a>00658
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   562
 
<a name="l00659"></a>00659         iConsole-&gt;Printf(KRemoveItemsFromPtrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   563
 
<a name="l00660"></a>00660         iConsole-&gt;Printf(KExitMsg);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   564
 
<a name="l00661"></a>00661         iConsole-&gt;Getch();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   565
 
<a name="l00662"></a>00662
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   566
 
<a name="l00663"></a>00663         <span class="comment">// Close and Cleanup hash map of pointers</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   567
 
<a name="l00664"></a>00664         CleanupStack::PopAndDestroy(&amp;ptrHashMap);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   568
 
<a name="l00665"></a>00665         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   569
 
<a name="l00666"></a>00666
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   570
 
<a name="l00667"></a>00667 <span class="keywordtype">void</span> MainL()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   571
 
<a name="l00668"></a>00668         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   572
 
<a name="l00669"></a>00669         <a class="code" href="class_c_hash_table_example.html">CHashTableExample</a>* app= <a class="code" href="class_c_hash_table_example.html#acf16d511ffe0f92724a2938659902ce8">CHashTableExample::NewL</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   573
 
<a name="l00670"></a>00670         CleanupStack::PushL(app);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   574
 
<a name="l00671"></a>00671
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   575
 
<a name="l00672"></a>00672         <span class="comment">// Hash set </span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   576
 
<a name="l00673"></a>00673         app-&gt;<a class="code" href="class_c_hash_table_example.html#a9f45f193bd3d5827ec302510e210a4ab">ConstructDefaultHashSet</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   577
 
<a name="l00674"></a>00674         app-&gt;<a class="code" href="class_c_hash_table_example.html#af0c455879cdb6f865a22fbf22bbff1d8">ConstructOwnHashSet</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   578
 
<a name="l00675"></a>00675         app-&gt;<a class="code" href="class_c_hash_table_example.html#aa0fb5a532b9e4fcc8e67da7acf7ac339">OperationsToHashSetL</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   579
 
<a name="l00676"></a>00676
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   580
 
<a name="l00677"></a>00677         <span class="comment">// Hash set of pointers</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   581
 
<a name="l00678"></a>00678         app-&gt;<a class="code" href="class_c_hash_table_example.html#a5d812199c1ec12e9f4fb087881c7486e">ConstructDefaultPtrHashSet</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   582
 
<a name="l00679"></a>00679         app-&gt;<a class="code" href="class_c_hash_table_example.html#aa5ee720dec65ddad2526ec9f4ef9d83a">ConstructOwnPtrHashSet</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   583
 
<a name="l00680"></a>00680         app-&gt;<a class="code" href="class_c_hash_table_example.html#ae386e8c189e8574d2e58e84b3e72d88a">OperationsToPtrHashSetL</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   584
 
<a name="l00681"></a>00681
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   585
 
<a name="l00682"></a>00682         <span class="comment">// Hash map</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   586
 
<a name="l00683"></a>00683         app-&gt;<a class="code" href="class_c_hash_table_example.html#aa5cab6d3367986e74c7751ad7ffbff56">ConstructDefaultHashMap</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   587
 
<a name="l00684"></a>00684         app-&gt;<a class="code" href="class_c_hash_table_example.html#a3eb16d70e743b00df2392d58ce36d906">ConstructOwnHashMap</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   588
 
<a name="l00685"></a>00685         app-&gt;<a class="code" href="class_c_hash_table_example.html#a44a2596c976b9bf32231603e74453f38">OperationsToHashMapL</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   589
 
<a name="l00686"></a>00686
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   590
 
<a name="l00687"></a>00687         <span class="comment">// Hash map of pointers</span>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   591
 
<a name="l00688"></a>00688         app-&gt;<a class="code" href="class_c_hash_table_example.html#a002b4a538fbbfcb250b5b6b0553559a4">ConstructDefaultPtrHashMap</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   592
 
<a name="l00689"></a>00689         app-&gt;<a class="code" href="class_c_hash_table_example.html#a88d7ae0091bd0fa4682736db79c88975">ConstructOwnPtrHashMap</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   593
 
<a name="l00690"></a>00690         app-&gt;<a class="code" href="class_c_hash_table_example.html#a3c2f6d5cdfd1b1f2ac2074fab48ca98a">OperationsToPtrHashMapL</a>();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   594
 
<a name="l00691"></a>00691
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   595
 
<a name="l00692"></a>00692         CleanupStack::PopAndDestroy(app);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   596
 
<a name="l00693"></a>00693         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   597
 
<a name="l00694"></a>00694
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   598
 
<a name="l00695"></a>00695 GLDEF_C TInt E32Main()
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   599
 
<a name="l00696"></a>00696         {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   600
 
<a name="l00697"></a>00697         __UHEAP_MARK;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   601
 
<a name="l00698"></a>00698
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   602
 
<a name="l00699"></a>00699         CTrapCleanup* cleanup = CTrapCleanup::New();
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   603
 
<a name="l00700"></a>00700         <span class="keywordflow">if</span>(cleanup == NULL)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   604
 
<a name="l00701"></a>00701                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   605
 
<a name="l00702"></a>00702                 <span class="keywordflow">return</span> KErrNoMemory;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   606
 
<a name="l00703"></a>00703                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   607
 
<a name="l00704"></a>00704         TRAPD(err, MainL());
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   608
 
<a name="l00705"></a>00705         <span class="keywordflow">if</span>(err !=KErrNone)
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   609
 
<a name="l00706"></a>00706                 {
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   610
 
<a name="l00707"></a>00707                 User::Panic(KFailed, err);
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   611
 
<a name="l00708"></a>00708                 }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   612
 
<a name="l00709"></a>00709         <span class="keyword">delete</span> cleanup;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   613
 
<a name="l00710"></a>00710
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   614
 
<a name="l00711"></a>00711         __UHEAP_MARKEND;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   615
 
<a name="l00712"></a>00712         <span class="keywordflow">return</span> KErrNone;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   616
 
<a name="l00713"></a>00713         }
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   617
 
<a name="l00714"></a>00714
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   618
 
<a name="l00715"></a>00715
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   619
 
<a name="l00716"></a>00716
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   620
 
<a name="l00717"></a>00717
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   621
 
<a name="l00718"></a>00718
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   622
 
<a name="l00719"></a>00719
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   623
 
<a name="l00720"></a>00720
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   624
 
</pre></div></div>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   625
 
<hr size="1"/><address style="text-align: right;"><small>Generated by&nbsp;
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
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diff changeset 
   626
 
<a href="http://www.doxygen.org/index.html">
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   627
 
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.6.2 </small></address>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   628
 
</body>
43e37759235e Week 12 contribution of example code"
Dominic Pinkman <Dominic.Pinkman@Nokia.com>
parents:
diff changeset 
   629
 
</html>
MCL/sftools/depl/docscontent