Proposal: add foldMapWithIndex to Data.Sequence

[Bardur Arantsson]

On 05/20/2016 07:20 PM, David Feuer wrote:
> foldMapWithIndex :: Monoid m
>      => (Int -> a -> m) -> Seq a -> m
> 
> This would match both Data.Map.foldMapWithKey and
> Control.Lens.Indexed.ifoldMap, filling out the indexed fold menagerie.
> 

+1

on the general principle that having as uniform an interface to the
'collections' is a Good Thing.