Function with 1 parameter.

In the following example the definition of succ is a shorthand for the anonymous class definition anonfun1:

  object Main extends Application {

    val succ = (x: Int) => x + 1

    val anonfun1 = new Function1[Int, Int] {
      def apply(x: Int): Int = x + 1
    }

    println(succ(0))
    println(anonfun1(0))
  }