aparler/RosettaCodeData
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Initial data commit

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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 72d218235f
commit f23f22d71c
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Task/Parametric-polymorphism/Clean/parametric-polymorphism-1.clean Normal file
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::Tree a = Empty | Node a (Tree a) (Tree a)
mapTree :: (a -> b) (Tree a) -> (Tree b)
mapTree f Empty = Empty
mapTree f (Node x l r) = Node (f x) (mapTree f l) (mapTree f r)

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Task/Parametric-polymorphism/Clean/parametric-polymorphism-2.clean Normal file
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instance Functor Tree where
fmap f Empty = Empty
fmap f (Node x l r) = Node (f x) (fmap f l) (fmap f r)

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Task/Parametric-polymorphism/Clean/parametric-polymorphism-3.clean Normal file
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add1Everywhere :: (f a) -> (f a) | Functor f & Num a
add1Everywhere nums = fmap (\x = x + 1) nums