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by pwm
1461 days ago
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Not OP but they meant https://hackage.haskell.org/package/base-4.16.1.0/docs/Data-... As you have the normal map function for Functors (using Haskell): > :t fmap
fmap :: Functor f => (a -> b) -> f a -> f b
you can have bimap for Bifunctors: > :t bimap
bimap :: Bifunctor p => (a -> b) -> (c -> d) -> p a c -> p b d
which specialised to pairs is: > :t bimap @(,)
bimap @(,) :: (a -> b) -> (c -> d) -> (a, c) -> (b, d)
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