On 6/13/06, Jenny678 <[EMAIL PROTECTED]> wrote:
Hallo I search a code for >elements_in_List([1,2],[1,2]). >True >elements_in_List([1,8],[1,2,3,4,8]). >True >elements_in_List([2,1],[1,2]). >True >elements_in_List([1,1],[1]). >False I have a code elements_in_List :: Eq a => [a] -> [a] -> Bool elements_in_List [] _ = True elements_in_List _ [] = False elements_in_List (x:xs) (y:ys) | x == y = elements_in_List xs ys | True = elements_in_List (x:xs) ys but it failed at >elements_in_List([2,1],[1,2]). >True I hope somebody can help me Please don't use built-in-Functions. Thanks for Help
I haven't looked too far into this, but how about something like this: elements_in_list a b = and $ map (\x -> element_in_list x b) a where element_in_list = ... Maybe if you don't want to use built-in functions, define your own 'and' as well. Bryan _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
