Duck Typing

ScalaProject.scala

object Main {
  def main(args:Array[String]) {
    //Duck typing
    def quackTheDuck( quackable: {def quack:String }) = {
      "What does a duck say? " + quackable.quack
    }
    class RealDuck { def quack = "Quack!" }
    class ImposterDuck { def quack = "Qwaack!" }
    quackTheDuck(new RealDuck)
    quackTheDuck(new ImposterDuck)
  }
}