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Add a both function.

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This commit is contained in:
Rob Rix 2016-02-29 01:31:04 -05:00
parent 7f73085dd5
commit 391d102dcf
1 changed files with 3 additions and 0 deletions
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src/Data/Functor/Both.hs
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@ -3,6 +3,9 @@ module Data.Functor.Both where
newtype Both a = Both { runBoth :: (a, a) }
deriving (Eq, Show, Functor, Foldable, Traversable)
both :: a -> a -> Both a
both = curry Both
instance Applicative Both where
pure a = Both (a, a)
Both (f, g) <*> Both (a, b) = Both (f a, g b)