[Haskell-cafe] Generalized null / zero

Mario Blažević blamario at acanac.net
Sat Feb 1 17:08:31 UTC 2014

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.


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