[Haskell-cafe] The case of the missing Arrow function

Ross Paterson ross at soi.city.ac.uk
Fri Jan 30 10:24:52 EST 2009

On Fri, Jan 30, 2009 at 03:05:52PM +0000, Neil Mitchell wrote:
> You're only a Hoogle away: http://haskell.org/hoogle/?hoogle=liftA2
> Control.Applicative	liftA2 :: Applicative f => (a -> b -> c) -> f a ->
> f b -> f c
> I guess its both an arrow function and an applicative function.

Ah, but this wasn't the function Henk was after.  liftA2 on arrows is
defined in the papers, but it's not in the library.

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