On Sun, 10 Feb 2008, Michael Feathers wrote: > How bad is this: > > addProduct :: [Product] -> Product -> [Product] > addProduct inventory product = nub (product : inventory) > > > compared to this: > > addProduct :: [Product] -> Product -> [Product] > addProduct inventory p > | isNothing (find (==p) inventory) = p : inventory > | otherwise = inventory
Data.Set is first choice, 'elem' is second choice, but still better than 'isNothing (find ...)'. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
