darcs patch: add Data.Set.notMember and Data.Map.notMember

Neil Mitchell ndmitchell at gmail.com
Fri Mar 10 07:02:39 EST 2006

Since everyone is disagreeing, and I think these are a good idea, I
thought I'd just say so.

> only a single obvious interpretation of meaning so people likely to
> define their own with same name conflicting with each other and it
> won't hurt to provide them.
This is the killer reason

If "not" is so easy and simple, why do we have both break and span ;)



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