Your approach generates oodles of duplicates which it then filters back out by eating up memory for hashes. The approach I outlined above generates no dupes to begin with.

I didn’t know about Math::Combinatorics though; nice module. It did annoy me that I had to use two different modules with confusing differences in their APIs. I’ll update my code to use M::C instead. Nope, doesn’t help, still need S::CP.

Makeshifts last the longest.

In reply to Re^2: Finding Neighbours of a String by Aristotle
in thread Finding Neighbours of a String by monkfan

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