On Sat, 2007-04-28 at 15:08 +0100, Neil Mitchell wrote: > Hi Hans, > > > > The standard function groupBy of List.hs doesn't work as I expect in > > > this case: > > > > > > groupBy (\x y -> (last x) == (last y)) ["abc", "bd","cac"] > > > > You are doing something wrong. groupBy is specified to never reorder > > elements. You probably want to use sortBy first. > > I have a defined groupSetBy which does groupBy working as though the > list was in fact a set (which is often what it really is). Its a > common thing to want - perhaps it should be a library function. And thanks again. I'll roll my own then..
Hans > > Thanks > > Neil _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
