Scala Ordering Sample

Ver.scala

object Main extends App {
  assert(Ver(1, 4) > Ver(1, 2))
  assert(Ver(2, 1) < Ver(3, 0))
  assert(Ver(4, 0) == Ver(4, 0))
  assert(List(Ver(1, 2), Ver(1, 4), Ver(1, 6)).min == Ver(1, 2))
}

case class Ver(major: Int, minor: Int) extends Ordered[Ver] {
  def compare(other: Ver) = {
    val major = this.major compare other.major
    if(major == 0) { this.minor compare other.minor } else major
  }
}