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							<!DOCTYPE html>
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    <meta charset="utf-8">
    <title>JSDoc: Class: Map</title>

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    <h1 class="page-title">Class: Map</h1>

    
<section>

<header>
    
        <h2><span class="attribs"><span class="type-signature"></span></span>
            <span class="ancestors"><a href="module-barejs_polyfill.html">barejs/polyfill</a>.</span>Map<span class="signature">()</span><span class="type-signature"></span></h2>
        
            <div class="class-description"><p>Mimics the implementation of a native <a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Map">Map</a>.
Has an O(n) lookup time for non String or Number keys, so cannot compete with a native Map (Which is supposed to have an O(1) lookup time).</p></div>
        
    
</header>

<article>
    <div class="container-overview">
    
        
    <h2>Constructor</h2>
    

    <h4 class="name" id="Map"><span class="type-signature"></span>new Map<span class="signature">()</span><span class="type-signature"></span></h4>
    

<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line32">line 32</a>
    </li></ul></dd>
    

</dl>


    </div>

    
        <h3 class="subsection-title">Classes</h3>

        <dl>
            <dt><a href="module-barejs_polyfill.Map-MapIterator.html">MapIterator</a></dt>
            <dd></dd>
        </dl>
    

        <h3 class="subsection-title">Members</h3>

        
<h4 class="name" id="size"><span class="type-signature">(readonly) </span>size<span class="type-signature"> :number</span></h4>


<div class="description">
    <p>The size of the Map, which represents the number of entries currently in the Map.</p>
</div>


    <h5>Type:</h5>
    <ul>
        <li>
            
<span class="param-type">number</span>


        </li>
    </ul>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line56">line 56</a>
    </li></ul></dd>
    

</dl>


        <h3 class="subsection-title">Methods</h3>

        
    <h4 class="name" id="delete"><span class="type-signature"></span>delete<span class="signature">(_key)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    <p>Remove the value for the specified key</p>
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>_key</code></td>
            

            <td class="type">
            
                
<span class="param-type">object</span>


            </td>

            
            <td class="description last"><p>The object to use as key.</p></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line106">line 106</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>True if the entry was deleted, false otherwise</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id="entries"><span class="type-signature"></span>entries<span class="signature">()</span><span class="type-signature"> &rarr; {<a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a>}</span></h4>
    

<div class="description">
    <p>Get an entry iterator</p>
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line159">line 159</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>A entry iterator</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type"><a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a></span>


    </dd>
</dl>

    
    <h4 class="name" id="forEach"><span class="type-signature"></span>forEach<span class="signature">(_callback, _thisArg<span class="signature-attributes">opt</span>)</span><span class="type-signature"></span></h4>
    

<div class="description">
    <p>Iterate the Map</p>
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th>Attributes</th>
        

        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>_callback</code></td>
            

            <td class="type">
            
                
<span class="param-type">function</span>


            </td>

            
                <td class="attributes">
                

                </td>
            

            <td class="description last"><p>The callback function.</p></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>_thisArg</code></td>
            

            <td class="type">
            
            </td>

            
                <td class="attributes">
                
                    &lt;optional><br>
                

                </td>
            

            <td class="description last"><p>Optional: context to call the callback in.</p></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line129">line 129</a>
    </li></ul></dd>
    

</dl>


    <h4 class="name" id="get"><span class="type-signature"></span>get<span class="signature">(_key)</span><span class="type-signature"></span></h4>
    

<div class="description">
    <p>Get the value for the specified key</p>
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>_key</code></td>
            

            <td class="type">
            
                
<span class="param-type">object</span>


            </td>

            
            <td class="description last"><p>The object to use as key.</p></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line83">line 83</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>The value, or undefined if the key is not known.</p>
</div>


    <h4 class="name" id="has"><span class="type-signature"></span>has<span class="signature">(_key)</span><span class="type-signature"> &rarr; {boolean}</span></h4>
    

<div class="description">
    <p>Check if the Map has an entry for the specified key</p>
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>_key</code></td>
            

            <td class="type">
            
                
<span class="param-type">object</span>


            </td>

            
            <td class="description last"><p>The object to use as key.</p></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line95">line 95</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>True if there is an entry for the key, false otherwise</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type">boolean</span>


    </dd>
</dl>

    
    <h4 class="name" id="keys"><span class="type-signature"></span>keys<span class="signature">()</span><span class="type-signature"> &rarr; {<a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a>}</span></h4>
    

<div class="description">
    <p>Get a key iterator</p>
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line139">line 139</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>A key iterator</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type"><a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a></span>


    </dd>
</dl>

    
    <h4 class="name" id="set"><span class="type-signature"></span>set<span class="signature">(_key, _value)</span><span class="type-signature"> &rarr; {<a href="module-barejs_polyfill.Map.html">module:barejs/polyfill.Map</a>}</span></h4>
    

<div class="description">
    <p>Set a value for the specified key in the Map.</p>
</div>


    <h5>Parameters:</h5>
    

<table class="params">
    <thead>
    <tr>
        
        <th>Name</th>
        

        <th>Type</th>

        
        <th class="last">Description</th>
    </tr>
    </thead>

    <tbody>
    

        <tr>
            
                <td class="name"><code>_key</code></td>
            

            <td class="type">
            
            </td>

            
            <td class="description last"><p>The object to use as key.</p></td>
        </tr>

    
        <tr>
            
                <td class="name"><code>_value</code></td>
            

            <td class="type">
            
            </td>

            
            <td class="description last"><p>The value to add.</p></td>
        </tr>

    
    </tbody>
</table>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line67">line 67</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>The Map (for chaining)</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type"><a href="module-barejs_polyfill.Map.html">module:barejs/polyfill.Map</a></span>


    </dd>
</dl>

    
    <h4 class="name" id="values"><span class="type-signature"></span>values<span class="signature">()</span><span class="type-signature"> &rarr; {<a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a>}</span></h4>
    

<div class="description">
    <p>Get a value iterator</p>
</div>


<dl class="details">

    
    <dt class="tag-source">Source:</dt>
    <dd class="tag-source"><ul class="dummy"><li>
        <a href="polyfill_Map.js.html">polyfill/Map.js</a>, <a href="polyfill_Map.js.html#line149">line 149</a>
    </li></ul></dd>
    

</dl>


<h5>Returns:</h5>

        
<div class="param-desc">
    <p>A value iterator</p>
</div>


<dl>
    <dt>
        Type
    </dt>
    <dd>
        
<span class="param-type"><a href="module-barejs_polyfill.Map-MapIterator.html">module:barejs/polyfill.Map~MapIterator</a></span>


    </dd>
</dl>

    
</article>

</section>


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