Re: [Haskell-cafe] standard function

On 06/06/07, Steffen Mazanek wrote:

Hello,

is there a function f::[a->b]->a->[b] in the libraries? Couldn't find one using hoogle although this seems to be quite a common thing...

Possibly it's just too small to bother putting in a separate function.

let fs = [ (*2), (+2), (2-) ] :t fs fs :: [Integer -> Integer] map ($5) fs [10,7,-3] :t map ($5) map ($5) :: (Num a) => [a -> b] -> [b] let g = \x -> map ($x) :t g g :: a -> [a -> b] -> [b]

That's essentially what you want, but we could go the extra distance.

:t flip g flip g :: [a -> b] -> a -> [b] let h = flip g h fs (5) [10,7,-3]

f fs i = map ($i) fs

D.