[Haskell-cafe] Generalizing catMaybes

[Tony Morris]

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 I am wondering if it possible to generalise catMaybes:

(Something f, SomethingElse t) => t (f a) -> t a

I have being doing some gymnastics with Traversable and Foldable and a
couple of other things from category-extras to no avail. Perhaps
someone else's brain is molded into an appropriate shape to reveal an
answer!

- -- 
Tony Morris
http://tmorris.net/

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