Heap's Algorithm and Generating Perl Code From Pseudocode

I've been researching recursion lately and in particular, permutations algorithms. This interest was spurred by a real-life case where such an algorithm would come in handy (combinations of @clients, @users, @tickets). I came across Wikipedia's entry for Heap's algorithm and the pseudocode illustrating the algorithm. I found the non-recursive version even more interesting specifically for its lack of needing to call itself, so I chose that version of the algorithm to study.

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user-pic I blog about Perl.