tarquin-the-brave/treblebangbefore.hs

Created May 12, 2020 13:36

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example from https://tarquin-the-brave.github.io/blog/posts/re-learning-haskell-2/

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treblebangbefore.hs

	(!!!) :: Integral a => [a] -> Int -> Maybe a
	infixl 9 !!!
	xs !!! i
	\| i < 0 = Nothing
	\| i >= length xs = Just 0
	\| otherwise = Just $ xs !! i

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