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singularitti/Slice.String.hs

Created April 7, 2019 05:34
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Slice a string in Haskell #Haskell #string
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Slice.String.hs
-- from [StackOverflow](https://stackoverflow.com/questions/4597820/does-haskell-have-list-slices-i-e-python)
takeStep :: Int -> [a] -> [a]
takeStep _ [] = []
takeStep n (x:xs) = x : takeStep n (drop (n-1) xs)
slice :: Int -> Int -> Int -> [a] -> [a]
slice start stop step = takeStep step . take (stop - start) . drop start
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