$HASH1 = {
           host_1 => '192.168.1.1',
           host_2 => '192.168.1.2',
           host_3 => '192.168.1.3'
         };
$ARRAY1 = [
            [
              'host_1',
              '192.168.1.1'
            ],
            [
              'host_2',
              '192.168.1.2'
            ],
            [
              'host_3',
              '192.168.1.3'
            ]
          ];