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ijoshsmith/zip.hs

Created April 22, 2015 03:54
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Haskell zip function
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zip.hs
-- Zips together two lists in Haskell.
zip' :: [a] -> [b] -> [(a, b)]
zip' xs [] = []
zip' [] ys = []
zip' (x:xs) (y:ys) = (x, y) : zip' xs ys
-- Example usages:
-- zip' "ABCDE" [1,2,3] …yields… [('A',1),('B',2),('C',3)]
-- zip' "AB" [1,2,3,4,5] …yields… [('A',1),('B',2)]
-- zip' "ABC" [] …yields… []
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