jyp_7 at yahoo.com
Mon Apr 26 09:50:13 EDT 2004
--- haskell at alias.spaceandtime.org wrote:
> I would like to request that multimap be added to
> the data library. As a
> C++ programmer (and a complete Haskell newbie), I
> find myself frequently
> using std::multimap from the STL. However, as I'm
> moving my programs to
> Haskell, I'm having to do hacks such as a maps of
> keys to sets of values.
> I noticed that DData is under consideration, which
> has a multiset, so
> why not a multimap?
I suggest you try "Map key (Set value)" with DData.
A number of functions are there to help you to
implement multimap semantics. (i.e. unionWith, adjust)
> I would implement it myself,
> but as I said, I am
> just learning FP.
With the scheme I described eariler, it is rather
trivial to implement; (almost) all you need is to
You're welcome :)
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