[Haskell-beginners] Mapping list over datatype using Traversable and State monad.

[Dmitriy Matrosov]

On Mon, 24 Sep 2012 16:35:45 -0400
Brent Yorgey <byorgey at seas.upenn.edu> wrote:

> My one suggestion might be to abstract out the "zippy apply" pattern,
> like so:
> 
>   zipApp :: Traversable f => [a -> b] -> f a -> f b
>   zipApp fs = fst . flip runState fs . T.mapM f
>     where 
>       f x = ... etc, same as above
> 
> Then inlineSeps g = zipApp (id : repeat g), and you can reuse zipApp
> for other things.

Thanks! This is nicer, indeed. Perhaps, the last piece i'm missed for :)