# before
$VAR1 = {
          '0002' => {
                      'key2' => 'value2'
                    },
          '0001' => {
                      'key3' => 'value3'
                    },
          '1' => {
                   'key1' => 'value1'
                 },
          '1.0' => {
                     'key2' => 'value2'
                   },
          '2' => {
                   'key1' => 'value1'
                 }
        };

# after
$VAR1 = {
          '1' => {
                   'key2' => 'value2',
                   'key1' => 'value1',
                   'key3' => 'value3'
                 },
          '2' => {
                   'key2' => 'value2',
                   'key1' => 'value1'
                 }
        };