[Haskell-cafe] Re: Why no merge and listDiff?

Christian Maeder Christian.Maeder at dfki.de
Wed Jan 20 12:35:32 EST 2010

Will Ness schrieb:
> I meant strictly increasing ordered lists, without multiples, for which the two 
> operations, 'merge' and 'minus', would also have to produce like lists, i.e 
> strictly increasing, without multiples.

Why don't you use directly Data.Set?

> I guess the first variety is more appropriate for bags, and the second one - 
> for sets. The two would have to be de-conflated for that. (?)

There are also bags aka multisets:

Cheers Christian

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