Created
February 7, 2012 03:11
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Haskell Powerset
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| {- | |
| Calling powerset with a list | |
| will return a list of all combinations of elements in the list. Example: | |
| powerset [1,2,3] | |
| returns : [[1,2,3],[1,2],[1,3],[1],[2,3],[2],[3],[]] | |
| -} | |
| import Control.Monad | |
| powerset :: [a] -> [[a]] | |
| powerset xs = filterM (\x -> [True, False]) xs |
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