saberworks,
I believe this does what you want and more:
#!/usr/bin/perl
use strict;
use warnings;
use Algorithm::Loops qw( NestedLoops );
my @products = qw(tshirt pants sweatshirt socks shoes);
my %options = (
sizes => [ qw(small medium large extra-large) ],
colors => [ qw(red green blue) ],
brands => [ qw(foo bar blah asdf) ]
);
my @Loops;
push @Loops , \@products;
push @Loops , $options{$_} for keys %options;
my $iter = NestedLoops( \@Loops );
my @combo;
print "@combo\n" while ( @combo = $iter->() );
Cheers - L~R
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