Created
April 25, 2011 19:16
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Powerset: Haskell vs. Ruby
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| import Control.Monad (filterM) | |
| powerset :: [a] -> [[a]] | |
| powerset = filterM (\x -> [True, False]) |
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| class Array | |
| def powerset | |
| return [[]] if empty? | |
| self[1..-1].powerset.map {|a| [self[0]] + a} + self[1..-1].powerset | |
| end | |
| end |
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