I arrived at the same solution: use Algorithm::Loops;
use Math::Combinatorics;
my $fixed_size = 2;
my @groups = (
[qw( A B C )],
[qw( 1 2 3 4 )],
[qw( yellow blue green )],
[qw( tiny small medium large gigantic )],
);
for my $fixed_size_groups ( combine( $fixed_size, @groups ) ) {
Algorithm::Loops::NestedLoops $fixed_size_groups, sub {
print "@_\n";
};
}
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