Data.Map/Data.IntMap additional features

Sterling Clover s.clover at
Tue Nov 3 19:23:27 EST 2009

On Tue, Nov 3, 2009 at 3:39 PM, Louis Wasserman
<wasserman.louis at> wrote:
> Using MonadPlus or Alternative instances for First and Last are rather
> elegant here, and I strongly support adding their Applicative, Alternative,
> Monad, and MonadPlus instances to base.

+1 for this. I've had to do it myself more than once. Also the functor instance.


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