Hi, I am trying to do the exercise which asks to define built-in functions 'last' and 'init' using 'foldr' function, such as last "Greggery Peccary" = 'y' the type for my function is: myLast :: [Char] -> Char I am not generalizing type so that make it less complicated. But what ever i am trying would not work. The only function type foldr takes as an argument is either (a->a->a) or (a->b->b) and none of the functions i found that would match this type from Char to Char. So in other words should be (Char->Char-Char). I can define the function without foldr but that misses the point of the exercise. Any hint will be appreciated, Thank you -- View this message in context: http://www.nabble.com/defining-last-using-foldr-tf4269357.html#a12151145 Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.