1 Feb
2014
1 Feb
'14
12:08 p.m.
On 01/28/14 21:25, Alvaro J. Genial wrote:
1. Is there a more general version of `null`? (e.g. for a Monad, Functor, Applicative, Traversable or the like.)
There is the MonoidNull class from my monoid-subclasses library. It comes with plenty of standard instances. http://hackage.haskell.org/package/monoid-subclasses-0.3.5/docs/Data-Monoid-...