[Haskell-cafe] Re: Leaves of a Tree

Hi Chad,

I think this idea is better than what I had suggested, but as it stands it doesn't typecheck. Did you mean something like this?

Yep, just the type signature was wrong :)

leaves :: Tree -> [Int] leaves = f [] where f rest (Leaf n) = n : rest f rest (Branch l r) = f (f rest r) l

Thanks Neil