f s = Data.Set.map f s
In the definition for method `fmap'
In the instance declaration for `Functor Data.Set.Set'
On the other hand, it seems intuitively natural to make Set an instance of
fmap. Any ideas on how to do it?
Thanks and Regards,
Lajos Nagy
then
ER is restored. (And those two operations is all I
need.)
I tried several ways of implementing it but those
monadic types just kept cropping up in the map interface.
I'd appreciate any ideas or pointers.
Regards,
Lajos Nagy
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(destructive vs. non-destructive) for functions which also seems an
interesting research area.
Regards,
-- Lajos Nagy
Computer Science Ph.D. Student, Florida Institute of Technology
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