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Ingy döt Net 2013-04-11 01:07:29 -07:00
parent b83f433714
commit 68f8f3e56b
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12
Task/Sorting-algorithms-Permutation-sort/Haskell/sorting-algorithms-permutation-sort-1.hs Normal file
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import Control.Monad
permutationSort l = head [p | p <- permute l, sorted p]
sorted (e1 : e2 : r) = e1 <= e2 && sorted (e2 : r)
sorted _ = True
permute = foldM (flip insert) []
insert e [] = return [e]
insert e l@(h : t) = return (e : l) `mplus`
do { t' <- insert e t ; return (h : t') }

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Task/Sorting-algorithms-Permutation-sort/Haskell/sorting-algorithms-permutation-sort-2.hs Normal file
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import Data.List (permutations)
permutationSort l = head [p | p <- permutations l, sorted p]
sorted (e1 : e2 : r) = e1 <= e2 && sorted (e2 : r)
sorted _ = True