A fun alternative that uses glob:

use strict;
use warnings;

my @lists = (
   [ qw/A B C D E F/ ],
   [ qw/1 2 3 4 5 6/ ],
   [ qw/apple orange pomegranate grape/ ],
   [ qw/wolf lion dog cat cow ape whale/ ],
);

my @ranges = map { [ 0..$#$_ ] } @lists;

my $glob_string = join '\\ ', 
                  map { '{'.join(',', @$_).'}' }
                  @ranges;

my @results;
while (glob($glob_string)) {
   my $i = 0;
   push(@results, [ map { $lists[$i++][$_] } split ]);
} 

print(join(' ', @$_), $/)
   foreach @results;

[download]

In reply to Re: generating combinations of elements of an arbitrary number of arrays by ikegami
in thread generating combinations of elements of an arbitrary number of arrays by mickey

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