Scala example source code file (bug3984.scala)

This example Scala source code file (bug3984.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

ih, ih, immutmap, immutset, int, int, list, map, map, mutset, set, set, test, unit

The Scala bug3984.scala source code

object SetBug {
  import scala.collection.immutable.{ Set => ImmutSet }
  import scala.collection.mutable.{ Set => MutSet }

  case class IH (i: Int, h: Int) {
    override def hashCode: Int = h
  }

  def run() {
    var is = ImmutSet.empty[IH]
    var ms = MutSet.empty[IH]
    for (ih <- List(IH(2,0),IH(0,0),IH(4,4),IH(6,4),IH(-8,1520786080))) {
      is = is + ih
      ms = ms + ih
    }
    assert(is == ms)
    val x = IH(6,4)
    is = is - x
    ms = ms - x
    assert(is == ms)
  }
}

object MapBug {
  import scala.collection.immutable.{ Map => ImmutMap }
  import scala.collection.mutable.{ Map => MutMap }

  case class IH (i: Int, h: Int) {
    override def hashCode: Int = h
  }

  def run() {
    var im = ImmutMap.empty[IH,IH]
    var mm = MutMap.empty[IH,IH]
    for (ih <- List(IH(2,0),IH(0,0),IH(4,4),IH(6,4),IH(-8,1520786080))) {
      im = im + ((ih,ih))
      mm = mm + ((ih,ih))
    }
    assert(im == mm)    
    val x = IH(6,4)
    im = im - x
    mm = mm - x
    assert(im == mm)
  }
}

object Test {
  def main(args: Array[String]): Unit = {
    SetBug.run()
    MapBug.run()
  }
}