If the N is dynamic, one can use Algorithm::Loops's NestedLoops. 

use Algorithm::Loops qw( NestedLoops );

my @arrays = (
   [qw( red blue )],
   [qw( sm med lrg )],
   [ 1..4 ],
);

NestedLoops(
   \@arrays,
   sub { print(join('-', @_), "\n"); },
);

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In reply to Re^2: Combinations / permutations... not even sure what this is called by ikegami
in thread Combinations / permutations... not even sure what this is called by tunafish

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