lass="toggle-link" data-toggle="collapse" href="#comment-func-map_">func map(<wbr>_:)</a>
        
<div class="comment collapse" id="comment-func-map_"><div class="p">
    <p>If <code>self == nil</code>, returns <code>nil</code>.  Otherwise, returns <code>f(self!)</code>.</p>

    <h4>Declaration</h4>    
    <code class="language-swift">func map&lt;U&gt;(f: @noescape (T) -&gt; U) -&gt; U?</code>
    
    
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