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class="sidebar-link">whereBetween()</a></li><li><a href="/<REPO>/api/whereIn.html" class="sidebar-link">whereIn()</a></li><li><a href="/<REPO>/api/whereInstanceOf.html" class="sidebar-link">whereInstanceOf()</a></li><li><a href="/<REPO>/api/whereNotBetween.html" class="sidebar-link">whereNotBetween()</a></li><li><a href="/<REPO>/api/whereNotIn.html" class="sidebar-link">whereNotIn()</a></li><li><a href="/<REPO>/api/wrap.html" class="sidebar-link">wrap()</a></li><li><a href="/<REPO>/api/zip.html" class="sidebar-link">zip()</a></li></ul></section></li></ul> </aside> <main class="page"> <div class="theme-default-content content__default"><h1 id="mapwithkeys"><a href="#mapwithkeys" aria-hidden="true" class="header-anchor">#</a> <code>mapWithKeys()</code></h1> <p>The mapWithKeys method iterates through the collection and passes each value to the given callback. The callback should return an array where the first element represents the key and the second element represents the value pair:</p> <div class="language-js extra-class"><pre class="language-js"><code><span class="token keyword">const</span> collection <span class="token operator">=</span> <span class="token function">collect</span><span class="token punctuation">(</span><span class="token punctuation">[</span>
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<span class="token punctuation">{</span>
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name<span class="token punctuation">:</span> <span class="token string">"John"</span><span class="token punctuation">,</span>
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department<span class="token punctuation">:</span> <span class="token string">"Sales"</span><span class="token punctuation">,</span>
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email<span class="token punctuation">:</span> <span class="token string">"john@example.com"</span>
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<span class="token punctuation">}</span><span class="token punctuation">,</span>
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<span class="token punctuation">{</span>
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name<span class="token punctuation">:</span> <span class="token string">"Jane"</span><span class="token punctuation">,</span>
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department<span class="token punctuation">:</span> <span class="token string">"Marketing"</span><span class="token punctuation">,</span>
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email<span class="token punctuation">:</span> <span class="token string">"jane@example.com"</span>
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<span class="token punctuation">}</span>
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<span class="token punctuation">]</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token keyword">const</span> keyed <span class="token operator">=</span> collection<span class="token punctuation">.</span><span class="token function">mapWithKeys</span><span class="token punctuation">(</span><span class="token keyword">function</span><span class="token punctuation">(</span><span class="token parameter">item</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
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<span class="token keyword">return</span> <span class="token punctuation">[</span>item<span class="token punctuation">.</span>email<span class="token punctuation">,</span> item<span class="token punctuation">.</span>name<span class="token punctuation">]</span><span class="token punctuation">;</span>
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<span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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keyed<span class="token punctuation">.</span><span class="token function">all</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
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<span class="token comment">//=> {</span>
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<span class="token comment">//=> 'john@example.com': 'John',</span>
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<span class="token comment">//=> 'jane@example.com': 'Jane',</span>
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<span class="token comment">//=> }</span>
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</code></pre></div><p><a href="https://github.com/ecrmnn/collect.js/blob/master/src/methods/mapWithKeys.js" target="_blank" rel="noopener noreferrer">View source on GitHub<svg xmlns="http://www.w3.org/2000/svg" aria-hidden="true" x="0px" y="0px" viewBox="0 0 100 100" width="15" height="15" class="icon outbound"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path> <polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></p></div> <footer class="page-edit"><!----> <!----></footer> <div class="page-nav"><p class="inner"><span class="prev">
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