MyOrderingNum

MyOrderingNum.scala

case class MyOrderedNum(value: Int) extends Ordered[MyOrderedNum] {
  override def compare(that: MyOrderedNum): Int = {
    if (this.value < that.value) -1
    else if (that.value < this.value) 1
    else 0
  }
}

case class MyOrderingNum(value: Int)(implicit ord: Ordering[MyOrderingNum]) {
  def >(that: MyOrderingNum): Boolean = ord.compare(this, that) > 0
}

object MyNumExample extends App {

  implicit object MyOrdering extends Ordering[MyOrderingNum] {
    override def compare(x: MyOrderingNum, y: MyOrderingNum): Int = {
      if (x.value < y.value) -1
      else if (y.value < x.value) 1
      else 0
    }
  }

  assert(MyOrderedNum(10) > MyOrderedNum(2))
  assert(MyOrderingNum(10) > MyOrderingNum(2))
}