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Description - Random key from Ruby Hash
I needed a Ruby Hash class that could Extract a Random Key from the keys that have not been extracted before. Plus that the class should be re-entrant...I found baby`s class, but it was not working (at least not in Ruby 1.8.x). I made it work (slight changes), and I added the keys_not_used to make it work FASTER (baby`s random would cycle almost forever on large lists). But I would say all credit should go to the original author, who did all the hard work.
