Hi, There is also this nice trick to use Debug.Trace:
merge xs ys | trace (show (xs,ys)) False = undefined -- add this as the first case to merge mergesort xs | trace (show xs) False = undefined -- and this as the first case to mergesort HTH, Ozgur
_______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe