[Haskell-cafe] Why is there no Zippable class? Would this work?

Jules Bean jules at jellybean.co.uk
Fri Jul 17 07:26:04 EDT 2009

Job Vranish wrote:
> I was needing a way to zip generic data structures together today and 
> was very annoyed to find that there is no Zippable class, or variant 
> there of.

Notice that you can always do this if the LHS is traversable and the RHS 
is Foldable (as a special case the RHS is the same as the LHS, since all 
foldables are traversable) :


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