Why not make it unlossy and have: trans :: (Ord k, Ord a) => Map k a -> Map a (Set k)
On Thu, Jun 16, 2011 at 9:10 AM, Johan Tibell <[email protected]>wrote: > On Thu, Jun 16, 2011 at 3:01 PM, Dmitri O.Kondratiev <[email protected]> > wrote: > > Hi, > > Data.Map has many great functions, yet I could not find the one that > allows > > from one map create another map where keys are values and values are keys > of > > the first one. > > Something like: > > transMap:: (Ord k, Ord a) => Map k a -> Map a k > > > > Does such function exist? > > Note that such a function would be lossy as there might be duplicate > values in the map. > > Cheers, > Johan > > _______________________________________________ > Haskell-Cafe mailing list > [email protected] > http://www.haskell.org/mailman/listinfo/haskell-cafe >
_______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
