y</code>, remove the last element and return it, otherwise
return <code>nil</code>.</p>

<p><strong>Complexity:</strong> O(<code>self.count</code>) if the array is bridged,
  otherwise O(1).</p>

    <h4>Declaration</h4>    
    <code class="language-swift">mutating func popLast() -&gt; Element?</code>
    
    
</div></div>
</div>
<div class="declaration inherited" id="func-prefix_">
<a class="toggle-link" data-toggle="collapse" href="#comment-func-prefix_">func prefix(<wbr>_:)</a>
        
<div class="com