Scala example source code file (eq.scala)

This example Scala source code file (eq.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

int, int, object, object, t, t

The Scala eq.scala source code

object eq extends testing.Benchmark {

  def eqtest[T](creator: Int => T, n: Int): Int = {
    val elems = Array.tabulate[AnyRef](n)(i => creator(i % 2).asInstanceOf[AnyRef])

    var sum = 0
    var i = 0
    while (i < n) {
      var j = 0
      while (j < n) {
        if (elems(i) eq elems(j)) sum += 1
        j += 1
      }
      i += 1
    }
    sum
  }

  val obj1 = new Object
  val obj2 = new Object

  def run() {
    var sum = 0
    sum += eqtest(x => if (x == 0) obj1 else obj2, 2000)
    sum += eqtest(x => x, 1000)
    sum += eqtest(x => x.toChar, 550)
    sum += eqtest(x => x.toByte, 550)
    sum += eqtest(x => x.toLong, 550)
    sum += eqtest(x => x.toShort, 100)
    sum += eqtest(x => x.toFloat, 100)
    sum += eqtest(x => x.toDouble, 100)
    assert(sum == 2958950)
  }
}