$VAR1 = {
          '3a' => 'Three',
          '2a' => 'Two',
          '4a' => 'Four',
          '1a' => 'One'
        };
$VAR1 = [
          '3a',
          '9d',
          '4a',
          '7b'
        ];

---------------------------------------
3a-inside while()3a-inside while()3a-inside while()3a-inside while()
9d-inside while()9d-inside while()9d-inside while()9d-inside while()Inside unless()

4a-inside while()4a-inside while()4a-inside while()4a-inside while()
7b-inside while()7b-inside while()7b-inside while()7b-inside while()Inside unless()
------------------------
$VAR1 = [
          'Three',
          '9d',
          'Four',
          '7b'
        ];