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bond15/Monad.hs

Created November 13, 2020 21:11
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Monad.hs
data Maybe a = None | Some a
class Monad f where
return :: a -> f a
bind :: f a -> (a -> f b) -> f b
instance Monad Maybe where
return x = Some x
bind None f = None
bind (Some x) f = f x
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