相关疑难解决方法(0)

我只看了List.scala的实现foldRight().

  override def reverse: List[A] = {
    var result: List[A] = Nil
    var these = this
    while (!these.isEmpty) {
      result = these.head :: result
      these = these.tail
    }
    result
  }

  override def foldRight[B](z: B)(op: (A, B) => B): B =
    reverse.foldLeft(z)((right, left) => op(left, right))

据我了解,呼吁foldRight对List结果调用theList.reverse.foldLeft(...).

是List.foldRight与实施foldLeft以便利用一个单一的堆栈帧,而不是使用多个堆栈帧与foldLeft？