jordanlewis · January 28, 2012 04:07
diff --git a/PFDS_list_update.scala b/PFDS_list_update.scala
 def update[A](xs: List[A], i: Int, y: A) : List[A] = (xs, i) match {
  case (Nil, _) => throw new AssertionError("Invalid subscript")
  case (x::xs, 0) => y::xs
  case (x::xs, i) => x::update(xs, i - 1, y)
 }
	def update[A](xs: List[A], i: Int, y: A) : List[A] = (xs, i) match {
	case (Nil, _) => throw new AssertionError("Invalid subscript")
	case (x::xs, 0) => y::xs
	case (x::xs, i) => x::update(xs, i - 1, y)
	}