Jose A. Lopes <jose.lopes <at> ist.utl.pt> writes: > unionWith :: Ord k => (a -> b -> c) -> Map k a -> Map > k b -> Map k c
what should be the result of unionWith undefined (M.singleton False 42) (M.singleton True "bar") ? perhaps you mean intersectionWith, which already has the type you want. - J.W. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
