Hello minh, Monday, May 8, 2006, 12:28:35 PM, you wrote:
> acc1 ints = foldr (+) 0 ints foldl? > ---------------------------------------------------------------------- > acc2 ints = execState (mapM add2 ints) 0 > add2 :: Int -> State Int () > add2 i = do > acc <- get > put (acc + i) put $! (acc+i) > ---------------------------------------------------------------------- > acc3 ints = runST (acc3' ints :: ST s Int) > acc3' ints = do > accRef <- newSTRef 0 > mapM (add3 accRef) ints > acc <- readSTRef accRef > return acc > add3 accRef i = do > modifySTRef accRef (+ i) use readref/writeref and $! -- Best regards, Bulat mailto:[EMAIL PROTECTED] _______________________________________________ Haskell mailing list Haskell@haskell.org http://www.haskell.org/mailman/listinfo/haskell
