为什么Ordered [A]使用比较方法而不是重用compareTo？

Question

trait Ordered[A] extends java.lang.Comparable[A] {
  def compare(that: A): Int
  def <  (that: A): Boolean = (this compare that) <  0
  def >  (that: A): Boolean = (this compare that) >  0
  def <= (that: A): Boolean = (this compare that) <= 0
  def >= (that: A): Boolean = (this compare that) >= 0
  def compareTo(that: A): Int = compare(that)
}

是不是有点用处有两个compare和compareTo？我在这里失踪的巨大好处是什么？

如果他们刚刚用compareTo我可能只是取代了Comparable用Ordered在我的代码和完成.

Answer 1

我认为这是一次历史性的事故.Ordered最初没有继承自Comparable.一旦它成功,compare名称已经建立.