--- haskell@alias.spaceandtime.org wrote:

Hello,

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 rename functions.

Thanks,

You're welcome :) JP. __________________________________ Do you Yahoo!? Yahoo! Photos: High-quality 4x6 digital prints for 25� http://photos.yahoo.com/ph/print_splash