[Haskell-cafe] Generalized null / zero

[Alvaro J. Genial]

On Sat, Feb 1, 2014 at 12:08 PM, Mario Blažević <blamario at acanac.net> wrote:

> 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.
>

This is very nice as it seems to mesh with my current thinking; I may end
up using it in Neat [1] shortly.

Thank you,

Alvaro
http://alva.ro

[1] https://github.com/ajg/neat
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