Scala example source code file (bug1220.scala)

This example Scala source code file (bug1220.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Scala tags/keywords

app, app, int, iterable, list, option, partialfunction, qsrichiterable, qsrichiterable, some, test, test, un, un

The Scala bug1220.scala source code

object Test extends App {

  class QSRichIterable[A](self: Iterable[A]) {
    def filterMap[R](f: PartialFunction[A,R]) = 
      self filter (f.isDefinedAt) map f
  }

  object Un {
    def unapply(i: Int): Option[Int] = Some(i)
  }

  val richIter = new QSRichIterable(List(0, 1, 2, 3, 4))

  assert((richIter filterMap {case Un(3) => 7}) == List(7))
}