Actually it's second that is fmap. Prelude> :m +Control.Monad.Instances Control.Arrow Prelude Control.Monad.Instances Control.Arrow> fmap (*2) (1,3) (1,6) Prelude Control.Monad.Instances Control.Arrow> second (*2) (1,3) (1,6) -Brent On Fri, Mar 09, 2012 at 07:23:50PM +0000, Thomas Davie wrote:
first ofc also being known as fmap.
Bob if (*ra4 != 0xffc78948) { return false; }
On 9 Mar 2012, at 19:09, Brent Yorgey wrote:
On Fri, Mar 09, 2012 at 09:07:24PM +0200, Ovidiu Deac wrote:
Does anybody know if there are any functions like these in the Haskell libray?
updateSnd f (x,y) -> (x, f y)
updateFst f (x,y) -> (f x, y)
Yes: 'first' and 'second' from Control.Arrow.
-Brent
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