Thanks Monks for the replies. Algorithm::Combinatorics appears to do this with:

variations_with_repetition(\@data, $k)

which is probably the correct name for it.

As far as a brute force cracker goes, the question then might be: is it more efficient to use Alorithm::Combinatronics in XScode and no threading, or divide the namespace into slabs for each thread of an Algorithm::Loop threaded implementation.

In reply to Re^2: Fastest way to do permutations with replacement by wdef2
in thread Fastest way to do permutations with replacement by wdef2

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