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Ingy döt Net 2013-04-11 01:07:29 -07:00
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Task/Sorting-algorithms-Shell-sort/Haskell/sorting-algorithms-shell-sort.hs Normal file
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import Data.List
shellSort xs = foldr (invColumnize (map (foldr insert []))) xs gaps
where gaps = takeWhile (< length xs) $ iterate (succ.(3*)) 1
invColumnize f k = concat. transpose. f. transpose
. takeWhile (not.null). unfoldr (Just. splitAt k)