title: Obtain reference from keys()
body: <p>I have an array :</p>
  
  <pre><code>my @y = keys(%{$table-&gt;{fields}});
  </code></pre>
  
  <p>I'd like to have the reference of that array :</p>
  
  <pre><code>$columns = \@y;
  </code></pre>
  
  <p>Is there a way to do this operation on a single line ?</p>