JustinSDK/EitherFunctor.hs

Created February 15, 2015 00:55

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〈Haskell Tutorial（25）可映射盒中物行為的 Functor〉的解答

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EitherFunctor.hs

	instance Functor (Either a) where
	fmap f (Right x) = Right (f x)
	fmap f (Left x) = Left x

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