Somebody asked me to do something that was partially solved by tsort,
but the next step exceeds the limitations of tsort.
After a bit of thought I realize this problem was a poster child
application for languages like Prolog or Mercury.
But I know I’m not going to have to time to learn them.
But ruby is pretty flexible…
Anybody have any Prolog alike goal finding / backtracking type ruby
module available? (Couldn’t spot any on RAA or rubyforge.)
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