Function0 (original) (raw)

scala.Function0

A function of 0 parameters.

In the following example, the definition of greeting is shorthand, conceptually, for the anonymous class definition anonfun0, although the implementation details of how the function value is constructed may differ:

object Main extends App {
  val name = "world"
  val greeting = () => s"hello, $name"

  val anonfun0 = new Function0[String] {
    def apply(): String = s"hello, $name"
  }
  assert(greeting() == anonfun0())
}