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<div class="headertitle"><div class="title">trie_using_hashmap.cpp</div></div>
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<div class="contents">
<a href="../../d5/d8a/trie__using__hashmap_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span></div>
<div class="line"><a id="l00013" name="l00013"></a><span class="lineno"> 13</span><span class="preprocessor">#include &lt;cassert&gt;</span> </div>
<div class="line"><a id="l00014" name="l00014"></a><span class="lineno"> 14</span><span class="preprocessor">#include &lt;iostream&gt;</span> </div>
<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include &lt;memory&gt;</span> </div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include &lt;stack&gt;</span> </div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include &lt;unordered_map&gt;</span> </div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include &lt;vector&gt;</span> </div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span></div>
<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d5/d3c/namespacedata__structures.html">data_structures</a> {</div>
<div class="line"><a id="l00025" name="l00025"></a><span class="lineno"> 25</span></div>
<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"> 31</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d7/d0a/namespacetrie__using__hashmap.html">trie_using_hashmap</a> {</div>
<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span></div>
<div class="foldopen" id="foldopen00039" data-start="{" data-end="};">
<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html"> 39</a></span><span class="keyword">class </span><a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a092d0805a9e647c2048777dbe67b35ab">Trie</a> {</div>
<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> <span class="keyword">private</span>:</div>
<div class="foldopen" id="foldopen00044" data-start="{" data-end="};">
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html"> 44</a></span> <span class="keyword">struct </span><a class="code hl_struct" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html">Node</a> {</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> std::unordered_map&lt;char16_t, std::shared_ptr&lt;Node&gt;&gt;</div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"><a class="line" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a08212cdc99164b59da91b81f45e2f88e"> 46</a></span> <a class="code hl_variable" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a08212cdc99164b59da91b81f45e2f88e">children</a>; </div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"><a class="line" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a3cdb077745d3dc97212d693132371219"> 48</a></span> <span class="keywordtype">bool</span> <a class="code hl_variable" href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a3cdb077745d3dc97212d693132371219">word_end</a> = <span class="keyword">false</span>; </div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> };</div>
</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> </div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248"> 51</a></span> std::shared_ptr&lt;Node&gt; <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a> =</div>
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> std::make_shared&lt;Node&gt;(); </div>
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> </div>
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keyword">public</span>:</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a092d0805a9e647c2048777dbe67b35ab"> 56</a></span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a092d0805a9e647c2048777dbe67b35ab">Trie</a>() = <span class="keywordflow">default</span>;</div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span></div>
<div class="foldopen" id="foldopen00062" data-start="{" data-end="}">
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2"> 62</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="keyword">const</span> std::string&amp; word) {</div>
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> std::shared_ptr&lt;Node&gt; curr = <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>;</div>
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> ch : word) {</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <span class="keywordflow">if</span> (curr-&gt;children.find(ch) == curr-&gt;children.end()) {</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> curr-&gt;children[ch] = std::make_shared&lt;Node&gt;();</div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> }</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> curr = curr-&gt;children[ch];</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> }</div>
<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span> </div>
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">if</span> (!curr-&gt;word_end &amp;&amp; curr != <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>) {</div>
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> curr-&gt;word_end = <span class="keyword">true</span>;</div>
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> }</div>
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> }</div>
</div>
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span></div>
<div class="foldopen" id="foldopen00082" data-start="{" data-end="}">
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f"> 82</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="keyword">const</span> std::string&amp; word) {</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> std::shared_ptr&lt;Node&gt; curr = <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>;</div>
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> ch : word) {</div>
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> <span class="keywordflow">if</span> (curr-&gt;children.find(ch) == curr-&gt;children.end()) {</div>
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> }</div>
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> curr = curr-&gt;children[ch];</div>
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <span class="keywordflow">if</span> (!curr) {</div>
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> }</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> }</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> </div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="keywordflow">if</span> (curr-&gt;word_end) {</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> }</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> }</div>
</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span></div>
<div class="foldopen" id="foldopen00107" data-start="{" data-end="}">
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17"> 107</a></span> <span class="keywordtype">bool</span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="keyword">const</span> std::string&amp; prefix) {</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> std::shared_ptr&lt;Node&gt; curr = <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>;</div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> ch : prefix) {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">if</span> (curr-&gt;children.find(ch) == curr-&gt;children.end()) {</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> }</div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> curr = curr-&gt;children[ch];</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> }</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> }</div>
</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span></div>
<div class="foldopen" id="foldopen00122" data-start="{" data-end="}">
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ac0bf3d6791cba144b3f539835d835e75"> 122</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ac0bf3d6791cba144b3f539835d835e75">delete_word</a>(std::string word) {</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> std::shared_ptr&lt;Node&gt; curr = <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>;</div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> std::stack&lt;std::shared_ptr&lt;Node&gt;&gt; nodes;</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="keywordtype">int</span> cnt = 0;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> ch : word) {</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> <span class="keywordflow">if</span> (curr-&gt;children.find(ch) == curr-&gt;children.end()) {</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> <span class="keywordflow">return</span>;</div>
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> }</div>
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> <span class="keywordflow">if</span> (curr-&gt;word_end) {</div>
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> cnt++;</div>
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> }</div>
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> </div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> nodes.push(curr-&gt;children[ch]);</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> curr = curr-&gt;children[ch];</div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> }</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <span class="comment">// Delete only when it&#39;s a word, and it has children after</span></div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> <span class="comment">// or prefix in the line</span></div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="keywordflow">if</span> (nodes.top()-&gt;word_end) {</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> nodes.top()-&gt;word_end = <span class="keyword">false</span>;</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> }</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> <span class="comment">// Delete only when it has no children after</span></div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <span class="comment">// and also no prefix in the line</span></div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="keywordflow">while</span> (!(nodes.top()-&gt;word_end) &amp;&amp; nodes.top()-&gt;children.empty()) {</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> nodes.pop();</div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> nodes.top()-&gt;children.erase(word.back());</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> word.pop_back();</div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> }</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> }</div>
</div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span></div>
<div class="foldopen" id="foldopen00160" data-start="{" data-end="}">
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a7bbe538c8015e8ce158e7ed43f605ebd"> 160</a></span> std::vector&lt;std::string&gt; <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a7bbe538c8015e8ce158e7ed43f605ebd">get_all_words</a>(std::vector&lt;std::string&gt; results,</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> <span class="keyword">const</span> std::shared_ptr&lt;Node&gt;&amp; element,</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> std::string prefix) {</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> <span class="keywordflow">if</span> (element-&gt;word_end) {</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> results.push_back(prefix);</div>
<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> }</div>
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <span class="keywordflow">if</span> (element-&gt;children.empty()) {</div>
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> <span class="keywordflow">return</span> results;</div>
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> }</div>
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> <span class="keyword">const</span>&amp; x : element-&gt;children) {</div>
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> std::string key = <span class="stringliteral">&quot;&quot;</span>;</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> key = x.first;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> prefix += key;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> results =</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a7bbe538c8015e8ce158e7ed43f605ebd">get_all_words</a>(results, element-&gt;children[x.first], prefix);</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> </div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> prefix.pop_back();</div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> }</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> </div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> <span class="keywordflow">return</span> results;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> }</div>
</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span></div>
<div class="foldopen" id="foldopen00188" data-start="{" data-end="}">
<div class="line"><a id="l00188" name="l00188"></a><span class="lineno"><a class="line" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4"> 188</a></span> std::vector&lt;std::string&gt; <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="keyword">const</span> std::string&amp; prefix) {</div>
<div class="line"><a id="l00189" name="l00189"></a><span class="lineno"> 189</span> std::vector&lt;std::string&gt; result;</div>
<div class="line"><a id="l00190" name="l00190"></a><span class="lineno"> 190</span> std::shared_ptr&lt;Node&gt; curr = <a class="code hl_variable" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">root_node</a>;</div>
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"> 191</span> <span class="comment">// traversing until the end of the given prefix in trie</span></div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> </div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="keywordflow">for</span> (<span class="keywordtype">char</span> ch : prefix) {</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> <span class="keywordflow">if</span> (curr-&gt;children.find(ch) == curr-&gt;children.end()) {</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> }</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> </div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> curr = curr-&gt;children[ch];</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> }</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> </div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> <span class="comment">// if the given prefix is the only word without children</span></div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> <span class="keywordflow">if</span> (curr-&gt;word_end &amp;&amp; curr-&gt;children.empty()) {</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span> result.push_back(prefix);</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span> }</div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="line"><a id="l00207" name="l00207"></a><span class="lineno"> 207</span> result = <a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a7bbe538c8015e8ce158e7ed43f605ebd">get_all_words</a>(</div>
<div class="line"><a id="l00208" name="l00208"></a><span class="lineno"> 208</span> result, curr,</div>
<div class="line"><a id="l00209" name="l00209"></a><span class="lineno"> 209</span> prefix); </div>
<div class="line"><a id="l00210" name="l00210"></a><span class="lineno"> 210</span> </div>
<div class="line"><a id="l00211" name="l00211"></a><span class="lineno"> 211</span> <span class="keywordflow">return</span> result;</div>
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"> 212</span> }</div>
</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span>};</div>
</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span>} <span class="comment">// namespace trie_using_hashmap</span></div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span>} <span class="comment">// namespace data_structures</span></div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span></div>
<div class="foldopen" id="foldopen00221" data-start="{" data-end="}">
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"><a class="line" href="../../d5/d8a/trie__using__hashmap_8cpp.html#aa8dca7b867074164d5f45b0f3851269d"> 221</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d5/d8a/trie__using__hashmap_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>() {</div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> <a class="code hl_class" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html">data_structures::trie_using_hashmap::Trie</a> obj;</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> <span class="comment">// Inserting data into trie using the insert</span></div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> <span class="comment">// method and testing it with search method</span></div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;app&quot;</span>);</div>
<div class="line"><a id="l00226" name="l00226"></a><span class="lineno"> 226</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;abscond&quot;</span>);</div>
<div class="line"><a id="l00227" name="l00227"></a><span class="lineno"> 227</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;about&quot;</span>);</div>
<div class="line"><a id="l00228" name="l00228"></a><span class="lineno"> 228</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;apps&quot;</span>);</div>
<div class="line"><a id="l00229" name="l00229"></a><span class="lineno"> 229</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;apen&quot;</span>);</div>
<div class="line"><a id="l00230" name="l00230"></a><span class="lineno"> 230</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;apples&quot;</span>);</div>
<div class="line"><a id="l00231" name="l00231"></a><span class="lineno"> 231</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;apple&quot;</span>);</div>
<div class="line"><a id="l00232" name="l00232"></a><span class="lineno"> 232</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;approach&quot;</span>);</div>
<div class="line"><a id="l00233" name="l00233"></a><span class="lineno"> 233</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;bus&quot;</span>);</div>
<div class="line"><a id="l00234" name="l00234"></a><span class="lineno"> 234</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;buses&quot;</span>);</div>
<div class="line"><a id="l00235" name="l00235"></a><span class="lineno"> 235</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;Apple&quot;</span>);</div>
<div class="line"><a id="l00236" name="l00236"></a><span class="lineno"> 236</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;Bounce&quot;</span>);</div>
<div class="line"><a id="l00237" name="l00237"></a><span class="lineno"> 237</span> </div>
<div class="line"><a id="l00238" name="l00238"></a><span class="lineno"> 238</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;appy&quot;</span>));</div>
<div class="line"><a id="l00239" name="l00239"></a><span class="lineno"> 239</span> std::cout &lt;&lt; <span class="stringliteral">&quot;appy is not a word in trie&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00240" name="l00240"></a><span class="lineno"> 240</span> </div>
<div class="line"><a id="l00241" name="l00241"></a><span class="lineno"> 241</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;car&quot;</span>));</div>
<div class="line"><a id="l00242" name="l00242"></a><span class="lineno"> 242</span> std::cout &lt;&lt; <span class="stringliteral">&quot;car is not a word in trie&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00243" name="l00243"></a><span class="lineno"> 243</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;app&quot;</span>));</div>
<div class="line"><a id="l00244" name="l00244"></a><span class="lineno"> 244</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;apple&quot;</span>));</div>
<div class="line"><a id="l00245" name="l00245"></a><span class="lineno"> 245</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;apples&quot;</span>));</div>
<div class="line"><a id="l00246" name="l00246"></a><span class="lineno"> 246</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;apps&quot;</span>));</div>
<div class="line"><a id="l00247" name="l00247"></a><span class="lineno"> 247</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;apen&quot;</span>));</div>
<div class="line"><a id="l00248" name="l00248"></a><span class="lineno"> 248</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;approach&quot;</span>));</div>
<div class="line"><a id="l00249" name="l00249"></a><span class="lineno"> 249</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;about&quot;</span>));</div>
<div class="line"><a id="l00250" name="l00250"></a><span class="lineno"> 250</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;abscond&quot;</span>));</div>
<div class="line"><a id="l00251" name="l00251"></a><span class="lineno"> 251</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;bus&quot;</span>));</div>
<div class="line"><a id="l00252" name="l00252"></a><span class="lineno"> 252</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;buses&quot;</span>));</div>
<div class="line"><a id="l00253" name="l00253"></a><span class="lineno"> 253</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;Bounce&quot;</span>));</div>
<div class="line"><a id="l00254" name="l00254"></a><span class="lineno"> 254</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;Apple&quot;</span>));</div>
<div class="line"><a id="l00255" name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a id="l00256" name="l00256"></a><span class="lineno"> 256</span> std::cout &lt;&lt; <span class="stringliteral">&quot;All the Inserted words are present in the trie&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00257" name="l00257"></a><span class="lineno"> 257</span> </div>
<div class="line"><a id="l00258" name="l00258"></a><span class="lineno"> 258</span> <span class="comment">// test for startwith prefix method</span></div>
<div class="line"><a id="l00259" name="l00259"></a><span class="lineno"> 259</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;approachs&quot;</span>));</div>
<div class="line"><a id="l00260" name="l00260"></a><span class="lineno"> 260</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;approach&quot;</span>));</div>
<div class="line"><a id="l00261" name="l00261"></a><span class="lineno"> 261</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;about&quot;</span>));</div>
<div class="line"><a id="l00262" name="l00262"></a><span class="lineno"> 262</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;appy&quot;</span>));</div>
<div class="line"><a id="l00263" name="l00263"></a><span class="lineno"> 263</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;abscond&quot;</span>));</div>
<div class="line"><a id="l00264" name="l00264"></a><span class="lineno"> 264</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;bus&quot;</span>));</div>
<div class="line"><a id="l00265" name="l00265"></a><span class="lineno"> 265</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;buses&quot;</span>));</div>
<div class="line"><a id="l00266" name="l00266"></a><span class="lineno"> 266</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;Bounce&quot;</span>));</div>
<div class="line"><a id="l00267" name="l00267"></a><span class="lineno"> 267</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;Apple&quot;</span>));</div>
<div class="line"><a id="l00268" name="l00268"></a><span class="lineno"> 268</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;abs&quot;</span>));</div>
<div class="line"><a id="l00269" name="l00269"></a><span class="lineno"> 269</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;b&quot;</span>));</div>
<div class="line"><a id="l00270" name="l00270"></a><span class="lineno"> 270</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;bus&quot;</span>));</div>
<div class="line"><a id="l00271" name="l00271"></a><span class="lineno"> 271</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;Bo&quot;</span>));</div>
<div class="line"><a id="l00272" name="l00272"></a><span class="lineno"> 272</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;A&quot;</span>));</div>
<div class="line"><a id="l00273" name="l00273"></a><span class="lineno"> 273</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;Ca&quot;</span>));</div>
<div class="line"><a id="l00274" name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a id="l00275" name="l00275"></a><span class="lineno"> 275</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;C&quot;</span>));</div>
<div class="line"><a id="l00276" name="l00276"></a><span class="lineno"> 276</span> </div>
<div class="line"><a id="l00277" name="l00277"></a><span class="lineno"> 277</span> std::cout &lt;&lt; <span class="stringliteral">&quot;All the tests passed for startwith method&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00278" name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a id="l00279" name="l00279"></a><span class="lineno"> 279</span> <span class="comment">// test for predict_words/recommendation of words based on a given prefix</span></div>
<div class="line"><a id="l00280" name="l00280"></a><span class="lineno"> 280</span> </div>
<div class="line"><a id="l00281" name="l00281"></a><span class="lineno"> 281</span> std::vector&lt;std::string&gt; pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;a&quot;</span>);</div>
<div class="line"><a id="l00282" name="l00282"></a><span class="lineno"> 282</span> </div>
<div class="line"><a id="l00283" name="l00283"></a><span class="lineno"> 283</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> std::string&amp; str : obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;a&quot;</span>)) {</div>
<div class="line"><a id="l00284" name="l00284"></a><span class="lineno"> 284</span> std::cout &lt;&lt; str &lt;&lt; std::endl;</div>
<div class="line"><a id="l00285" name="l00285"></a><span class="lineno"> 285</span> }</div>
<div class="line"><a id="l00286" name="l00286"></a><span class="lineno"> 286</span> assert(pred_words.size() == 8);</div>
<div class="line"><a id="l00287" name="l00287"></a><span class="lineno"> 287</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Returned all words that start with prefix a &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00288" name="l00288"></a><span class="lineno"> 288</span> pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;app&quot;</span>);</div>
<div class="line"><a id="l00289" name="l00289"></a><span class="lineno"> 289</span> </div>
<div class="line"><a id="l00290" name="l00290"></a><span class="lineno"> 290</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> std::string&amp; str : pred_words) {</div>
<div class="line"><a id="l00291" name="l00291"></a><span class="lineno"> 291</span> std::cout &lt;&lt; str &lt;&lt; std::endl;</div>
<div class="line"><a id="l00292" name="l00292"></a><span class="lineno"> 292</span> }</div>
<div class="line"><a id="l00293" name="l00293"></a><span class="lineno"> 293</span> </div>
<div class="line"><a id="l00294" name="l00294"></a><span class="lineno"> 294</span> assert(pred_words.size() == 5);</div>
<div class="line"><a id="l00295" name="l00295"></a><span class="lineno"> 295</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Returned all words that start with prefix app &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00296" name="l00296"></a><span class="lineno"> 296</span> pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;A&quot;</span>);</div>
<div class="line"><a id="l00297" name="l00297"></a><span class="lineno"> 297</span> </div>
<div class="line"><a id="l00298" name="l00298"></a><span class="lineno"> 298</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> std::string&amp; str : pred_words) {</div>
<div class="line"><a id="l00299" name="l00299"></a><span class="lineno"> 299</span> std::cout &lt;&lt; str &lt;&lt; std::endl;</div>
<div class="line"><a id="l00300" name="l00300"></a><span class="lineno"> 300</span> }</div>
<div class="line"><a id="l00301" name="l00301"></a><span class="lineno"> 301</span> </div>
<div class="line"><a id="l00302" name="l00302"></a><span class="lineno"> 302</span> assert(pred_words.size() == 1);</div>
<div class="line"><a id="l00303" name="l00303"></a><span class="lineno"> 303</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Returned all words that start with prefix A &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00304" name="l00304"></a><span class="lineno"> 304</span> pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;bu&quot;</span>);</div>
<div class="line"><a id="l00305" name="l00305"></a><span class="lineno"> 305</span> </div>
<div class="line"><a id="l00306" name="l00306"></a><span class="lineno"> 306</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> std::string&amp; str : pred_words) {</div>
<div class="line"><a id="l00307" name="l00307"></a><span class="lineno"> 307</span> std::cout &lt;&lt; str &lt;&lt; std::endl;</div>
<div class="line"><a id="l00308" name="l00308"></a><span class="lineno"> 308</span> }</div>
<div class="line"><a id="l00309" name="l00309"></a><span class="lineno"> 309</span> </div>
<div class="line"><a id="l00310" name="l00310"></a><span class="lineno"> 310</span> assert(pred_words.size() == 2);</div>
<div class="line"><a id="l00311" name="l00311"></a><span class="lineno"> 311</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Returned all words that start with prefix bu &quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00312" name="l00312"></a><span class="lineno"> 312</span> </div>
<div class="line"><a id="l00313" name="l00313"></a><span class="lineno"> 313</span> <span class="comment">// tests for delete method</span></div>
<div class="line"><a id="l00314" name="l00314"></a><span class="lineno"> 314</span> </div>
<div class="line"><a id="l00315" name="l00315"></a><span class="lineno"> 315</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ac0bf3d6791cba144b3f539835d835e75">delete_word</a>(<span class="stringliteral">&quot;app&quot;</span>);</div>
<div class="line"><a id="l00316" name="l00316"></a><span class="lineno"> 316</span> assert(!obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">search</a>(<span class="stringliteral">&quot;app&quot;</span>));</div>
<div class="line"><a id="l00317" name="l00317"></a><span class="lineno"> 317</span> std::cout &lt;&lt; <span class="stringliteral">&quot;word app is deleted sucessful&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00318" name="l00318"></a><span class="lineno"> 318</span> </div>
<div class="line"><a id="l00319" name="l00319"></a><span class="lineno"> 319</span> pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;app&quot;</span>);</div>
<div class="line"><a id="l00320" name="l00320"></a><span class="lineno"> 320</span> <span class="keywordflow">for</span> (<span class="keyword">const</span> std::string&amp; str : pred_words) {</div>
<div class="line"><a id="l00321" name="l00321"></a><span class="lineno"> 321</span> std::cout &lt;&lt; str &lt;&lt; std::endl;</div>
<div class="line"><a id="l00322" name="l00322"></a><span class="lineno"> 322</span> }</div>
<div class="line"><a id="l00323" name="l00323"></a><span class="lineno"> 323</span> assert(pred_words.size() == 4);</div>
<div class="line"><a id="l00324" name="l00324"></a><span class="lineno"> 324</span> std::cout &lt;&lt; <span class="stringliteral">&quot;app is deleted sucessful&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00325" name="l00325"></a><span class="lineno"> 325</span> </div>
<div class="line"><a id="l00326" name="l00326"></a><span class="lineno"> 326</span> <span class="comment">// test case for Chinese language</span></div>
<div class="line"><a id="l00327" name="l00327"></a><span class="lineno"> 327</span> </div>
<div class="line"><a id="l00328" name="l00328"></a><span class="lineno"> 328</span> obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">insert</a>(<span class="stringliteral">&quot;苹果&quot;</span>);</div>
<div class="line"><a id="l00329" name="l00329"></a><span class="lineno"> 329</span> assert(obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">startwith</a>(<span class="stringliteral">&quot;苹&quot;</span>));</div>
<div class="line"><a id="l00330" name="l00330"></a><span class="lineno"> 330</span> pred_words = obj.<a class="code hl_function" href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">predict_words</a>(<span class="stringliteral">&quot;h&quot;</span>);</div>
<div class="line"><a id="l00331" name="l00331"></a><span class="lineno"> 331</span> </div>
<div class="line"><a id="l00332" name="l00332"></a><span class="lineno"> 332</span> assert(pred_words.size() == 0);</div>
<div class="line"><a id="l00333" name="l00333"></a><span class="lineno"> 333</span> std::cout &lt;&lt; <span class="stringliteral">&quot;No word starts with prefix h in trie&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00334" name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a id="l00335" name="l00335"></a><span class="lineno"> 335</span> std::cout &lt;&lt; <span class="stringliteral">&quot;All tests passed&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00336" name="l00336"></a><span class="lineno"> 336</span>}</div>
</div>
<div class="line"><a id="l00337" name="l00337"></a><span class="lineno"> 337</span></div>
<div class="foldopen" id="foldopen00342" data-start="{" data-end="}">
<div class="line"><a id="l00342" name="l00342"></a><span class="lineno"><a class="line" href="../../d5/d8a/trie__using__hashmap_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 342</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d5/d8a/trie__using__hashmap_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00343" name="l00343"></a><span class="lineno"> 343</span> <a class="code hl_function" href="../../d5/d8a/trie__using__hashmap_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementaions</span></div>
<div class="line"><a id="l00344" name="l00344"></a><span class="lineno"> 344</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00345" name="l00345"></a><span class="lineno"> 345</span>}</div>
</div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html">data_structures::trie_using_hashmap::Trie</a></div><div class="ttdoc">Trie class, implementation of trie using hashmap in each trie node for all the characters of char16_t...</div><div class="ttdef"><b>Definition</b> <a href="#l00039">trie_using_hashmap.cpp:39</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_a092d0805a9e647c2048777dbe67b35ab"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a092d0805a9e647c2048777dbe67b35ab">data_structures::trie_using_hashmap::Trie::Trie</a></div><div class="ttdeci">Trie()=default</div><div class="ttdoc">&lt; Constructor</div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_a7bbe538c8015e8ce158e7ed43f605ebd"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a7bbe538c8015e8ce158e7ed43f605ebd">data_structures::trie_using_hashmap::Trie::get_all_words</a></div><div class="ttdeci">std::vector&lt; std::string &gt; get_all_words(std::vector&lt; std::string &gt; results, const std::shared_ptr&lt; Node &gt; &amp;element, std::string prefix)</div><div class="ttdoc">helper function to predict/recommend words that starts with a given prefix from the end of prefix&#39;s n...</div><div class="ttdef"><b>Definition</b> <a href="#l00160">trie_using_hashmap.cpp:160</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_a832072498abeaa52ad43c4fc99cba248"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#a832072498abeaa52ad43c4fc99cba248">data_structures::trie_using_hashmap::Trie::root_node</a></div><div class="ttdeci">std::shared_ptr&lt; Node &gt; root_node</div><div class="ttdoc">declaring root node of trie</div><div class="ttdef"><b>Definition</b> <a href="#l00051">trie_using_hashmap.cpp:51</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_abcae0a4456e7f583ce716e3ef466dfd2"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#abcae0a4456e7f583ce716e3ef466dfd2">data_structures::trie_using_hashmap::Trie::insert</a></div><div class="ttdeci">void insert(const std::string &amp;word)</div><div class="ttdoc">insert the string into the trie</div><div class="ttdef"><b>Definition</b> <a href="#l00062">trie_using_hashmap.cpp:62</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_ac0bf3d6791cba144b3f539835d835e75"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ac0bf3d6791cba144b3f539835d835e75">data_structures::trie_using_hashmap::Trie::delete_word</a></div><div class="ttdeci">void delete_word(std::string word)</div><div class="ttdoc">delete a word/string from a trie</div><div class="ttdef"><b>Definition</b> <a href="#l00122">trie_using_hashmap.cpp:122</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_ad71eb24207c28b546631802dba97310f"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ad71eb24207c28b546631802dba97310f">data_structures::trie_using_hashmap::Trie::search</a></div><div class="ttdeci">bool search(const std::string &amp;word)</div><div class="ttdoc">search a word/string inside the trie</div><div class="ttdef"><b>Definition</b> <a href="#l00082">trie_using_hashmap.cpp:82</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_ae15fdc7f2b5023992d87a711d78566c4"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#ae15fdc7f2b5023992d87a711d78566c4">data_structures::trie_using_hashmap::Trie::predict_words</a></div><div class="ttdeci">std::vector&lt; std::string &gt; predict_words(const std::string &amp;prefix)</div><div class="ttdoc">predict/recommend a word that starts with a given prefix</div><div class="ttdef"><b>Definition</b> <a href="#l00188">trie_using_hashmap.cpp:188</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1trie__using__hashmap_1_1_trie_html_af3aee573fbabd2c1510c0f74f842dd17"><div class="ttname"><a href="../../d3/d26/classdata__structures_1_1trie__using__hashmap_1_1_trie.html#af3aee573fbabd2c1510c0f74f842dd17">data_structures::trie_using_hashmap::Trie::startwith</a></div><div class="ttdeci">bool startwith(const std::string &amp;prefix)</div><div class="ttdoc">search a word/string that starts with a given prefix</div><div class="ttdef"><b>Definition</b> <a href="#l00107">trie_using_hashmap.cpp:107</a></div></div>
<div class="ttc" id="anamespacedata__structures_html"><div class="ttname"><a href="../../d5/d3c/namespacedata__structures.html">data_structures</a></div><div class="ttdoc">for IO operations</div></div>
<div class="ttc" id="anamespacetrie__using__hashmap_html"><div class="ttname"><a href="../../d7/d0a/namespacetrie__using__hashmap.html">trie_using_hashmap</a></div><div class="ttdoc">Functions for Trie data structure using hashmap implementation.</div></div>
<div class="ttc" id="astructdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node_html"><div class="ttname"><a href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html">data_structures::trie_using_hashmap::Trie::Node</a></div><div class="ttdoc">struct representing a trie node.</div><div class="ttdef"><b>Definition</b> <a href="#l00044">trie_using_hashmap.cpp:44</a></div></div>
<div class="ttc" id="astructdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node_html_a08212cdc99164b59da91b81f45e2f88e"><div class="ttname"><a href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a08212cdc99164b59da91b81f45e2f88e">data_structures::trie_using_hashmap::Trie::Node::children</a></div><div class="ttdeci">std::unordered_map&lt; char16_t, std::shared_ptr&lt; Node &gt; &gt; children</div><div class="ttdef"><b>Definition</b> <a href="#l00046">trie_using_hashmap.cpp:46</a></div></div>
<div class="ttc" id="astructdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node_html_a3cdb077745d3dc97212d693132371219"><div class="ttname"><a href="../../d5/d12/structdata__structures_1_1trie__using__hashmap_1_1_trie_1_1_node.html#a3cdb077745d3dc97212d693132371219">data_structures::trie_using_hashmap::Trie::Node::word_end</a></div><div class="ttdeci">bool word_end</div><div class="ttdoc">boolean variable to represent the node end</div><div class="ttdef"><b>Definition</b> <a href="#l00048">trie_using_hashmap.cpp:48</a></div></div>
<div class="ttc" id="atrie__using__hashmap_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../d5/d8a/trie__using__hashmap_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition</b> <a href="#l00221">trie_using_hashmap.cpp:221</a></div></div>
<div class="ttc" id="atrie__using__hashmap_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d5/d8a/trie__using__hashmap_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdoc">Main function.</div><div class="ttdef"><b>Definition</b> <a href="#l00342">trie_using_hashmap.cpp:342</a></div></div>
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