Lacking the magic of solutions by
LanX or
choroba, this solution uses
Algorithm::Combinatorics and
List::MoreUtils.
#!/usr/bin/perl
use strict;
use warnings;
use Algorithm::Combinatorics 'variations_with_repetition';
use List::MoreUtils 'pairwise';
my @a = 1 .. 3;
my @b = qw/a b/;
my @c;
my $iter = variations_with_repetition (\@b, scalar @a);
while (my $tuple = $iter->next) {
no warnings 'once'; # silence warnings about $a $b only used once
my @temp = pairwise { [$a,$b] } @a, @$tuple;
push @c, \@temp;
}
use Data::Dump; dd \@c;
Dump output:
[
[[1, "a"], [2, "a"], [3, "a"]],
[[1, "a"], [2, "a"], [3, "b"]],
[[1, "a"], [2, "b"], [3, "a"]],
[[1, "a"], [2, "b"], [3, "b"]],
[[1, "b"], [2, "a"], [3, "a"]],
[[1, "b"], [2, "a"], [3, "b"]],
[[1, "b"], [2, "b"], [3, "a"]],
[[1, "b"], [2, "b"], [3, "b"]],
]
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