http://qs1969.pair.com?node_id=11124919


in reply to Please help me understand this permutation sub?

It looks like those more knowledgeable than me have already set you on the right path but I too, struggle with recursion and coming up with permutations. I finally put together a small script in Perl to help with this and wrote about it here if you're interested.

Gratias tibi ago
Leudwinus