On Jun 14, 2011, at 10:01 PM, Zhi-Qiang Lei wrote: > I wonder why haskell do not take foldl' as default foldl if foldl is not used in production often. It would be quite interesting to grep over the ghc sources to find uses of foldl. ____________________ David Place Owner, Panpipes Ho! LLC http://panpipesho.com d at vidplace.com