$VAR1 = {
          'jack' => '2',
          'joe' => '1',
          '3' => undef,
          'jim' => '4'
        };
$VAR2 = {
          '4' => undef,
          'jack' => '2',
          'joe' => '1',
          'jim' => '3'
        };

##</code><code>##

$VAR1 = {
          'jack' => '2',
          'joe' => '1',
          'jim' => ['3','4']
        };