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Irio/gist:430a457be0a5d8ab580d

Created July 9, 2014 18:10
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Function composition and application in Haskell
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gistfile1.hs
sumArgs :: Integer -> Integer -> Integer
sumArgs x y = x + y
times10 :: Integer -> Integer
times10 x = x * 10
-- times10 . sumArgs 1 2 will become
-- > let composed = \x -> times10 (sumArgs x)
-- > composed 1 2
-- error!
--
-- times10 . sumArgs 1 $ 2 will become
-- > let composed = \x -> times10 ((sumArgs x) 2)
-- > composed 1
-- 30
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