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lib: currying helpers

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Simon Michael 2019-08-19 02:09:27 +01:00
parent de9df350b4
commit 4beb416070
1 changed files with 21 additions and 0 deletions
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21
hledger-lib/Hledger/Utils.hs
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@ -93,6 +93,27 @@ fourth6 (_,_,_,x,_,_) = x
fifth6 (_,_,_,_,x,_) = x
sixth6 (_,_,_,_,_,x) = x
-- currying
curry2 :: ((a, b) -> c) -> a -> b -> c
curry2 f x y = f (x, y)
uncurry2 :: (a -> b -> c) -> (a, b) -> c
uncurry2 f (x, y) = f x y
curry3 :: ((a, b, c) -> d) -> a -> b -> c -> d
curry3 f x y z = f (x, y, z)
uncurry3 :: (a -> b -> c -> d) -> (a, b, c) -> d
uncurry3 f (x, y, z) = f x y z
curry4 :: ((a, b, c, d) -> e) -> a -> b -> c -> d -> e
curry4 f w x y z = f (w, x, y, z)
uncurry4 :: (a -> b -> c -> d -> e) -> (a, b, c, d) -> e
uncurry4 f (w, x, y, z) = f w x y z
-- lists
splitAtElement :: Eq a => a -> [a] -> [[a]]