Re: [Haskell-cafe] Arrow instance of function type [a] -> [b]

On Wed, Jul 6, 2011 at 6:04 AM, Markus Läll wrote:

Is it possible to define an Arrow instance of list to list functions?

import Control.Arrow import Control.Category

type X a b = [a] -> [b]

You need a newtype here. (->) is already an arrow.