Scala example source code file (looping-jsig.scala)

This example Scala source code file (looping-jsig.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

a, a, b, b, bugtrack, hashmap, int, int, none, none, some

The Scala looping-jsig.scala source code

import scala.collection.mutable._

trait BugTrack {
    trait B[+T] 
    val cache : HashMap[A[_], B[_]] = HashMap.empty

    def A[T](f: Int => B[T]): A[T] 
        = new A[T]{def apply(in: Int) = f(in)}
        
    abstract class A[+T] extends (Int => B[T]) {
      def giveMeSame = this
    }  

    def amethod[T](p: =>A[T]): A[T] = A(in => cache.get(p) match {
           case Some(res) => res
           case None => p(in)
     }).giveMeSame.asInstanceOf[A[T]]
}