week5/mart/Origami.icl

   1 module Origami
   2
   3 import StdEnv
   4
   5 sum` = foldr (+) 0
   6 prod` = foldr (*) 1
   7 flatten` = foldr (++) []
   8 length` = foldr (\x l=l+1) 0
   9 reverse` = foldl (\xs x=[x:xs]) []
  10 takeWhile` p = foldr (\x xs=if (p x) [x:xs] []) []
  11 maxList` [x:xs] = foldr max x xs