Question

I need to use function cartesian from List::Gen. This function requires LIST as a second parameter, but I have an array, like

$VAR1 = [
          [
            1,
            2,
            3
          ],
          [
            'a',
            'b',
            'c'
          ],
          [
            'x'
          ]
        ];

How can I “convert” such array into list, so cartesian can be used? Putting array into list context does not seems to work in this case.

Answer 1

In your new question, you have

$VAR1 = [
      [
        1,
        2,
        3
      ],
      [
        'a',
        'b',
        'c'
      ],
      [
        'x'
      ]
    ];

Despite your claims that it doesn’t work, all you need is to evaluate the array in list context.

cartesian { ... } @$VAR1;

For example,

( cartesian { join '|', @_ } @$VAR1 )->say;

gives

1|a|x 1|b|x 1|c|x 2|a|x 2|b|x 2|c|x 3|a|x 3|b|x 3|c|x