title: How do I get a slice from an array reference?
body: <p>Let us say that we have following array:</p>
  
  <pre><code>my @arr=('Jan','Feb','Mar','Apr');
  my @arr2=@arr[0..2];
  </code></pre>
  
  <p>How can we do the same thing if we have array reference like below:</p>
  
  <pre><code>my $arr_ref=['Jan','Feb','Mar','Apr'];
  my $arr_ref2; # How can we do something similar to @arr[0..2]; using $arr_ref ?
  </code></pre>