I stand corrected On Thu, 6 Nov 2003 06:39 pm, Tomasz Zielonka wrote:
On Thu, Nov 06, 2003 at 03:41:32PM +1100, Thomas L. Bevan wrote:
patty,
what you have written is not a fold. A fold operates over a list. There is no list in your code, only some sort of tree structure.
I think you are wrong. Folds are not restricted to lists and lists are also "some sort of tree structure".
See http://www.haskell.org/hawiki/WhatIsaFold
Best regards, Tom
-- It is inconceivable that a judicious observer from another solar system would see in our species -- which has tended to be cruel, destructive, wasteful, and irrational -- the crown and apex of cosmic evolution. Viewing us as the culmination of *anything* is grotesque; viewing us as a transitional species makes more sense -- and gives us more hope. - Betty McCollister, "Our Transitional Species", Free Inquiry magazine, Vol. 8, No. 1