Scala example source code file (t3829.scala)

This example Scala source code file (t3829.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

array, array, none, none, test, test

The Scala t3829.scala source code

// ticket #3829
object Test {
  import collection.{ mutable, immutable }
  
  def main(args: Array[String]) {
    val map = immutable.Map(1 -> 2, 3 -> 4)
    assert(map.get(0) == None)
    
    // Since r24255 defaultMap.get(x) returns None rather than
    // using the default, so these mostly use apply.
    val defmap = map.withDefaultValue(-1)
    assert(defmap(0) == -1)
    assert(defmap.size == 2)
    assert(defmap.iterator.size == 2)
    assert(defmap.empty(0) == -1)
    assert((defmap + (2 -> 3))(0) == -1)
    assert((defmap + (2 -> 3))(1) == 2)
    assert((defmap + (2 -> 3))(2) == 3)
    assert((defmap - 1)(0) == -1)
    assert((defmap - 1)(1) == -1)
    assert((defmap - 1)(3) == 4)
    
    val mutmap = mutable.Map(1 -> 2, 2 -> 3)
    assert(mutmap.get(0) == None)
    
    val defmutmap = mutmap.withDefaultValue(-1)
    assert(defmutmap(0) == -1)
    assert(defmutmap(3) == -1)
    mutmap += 3 -> 4
    assert(defmutmap(3) == 4)
    assert(defmutmap(1) == 2)
    mutmap -= 1
    assert(defmutmap(1) == -1)
    assert(mutmap.get(1) == None)
    defmutmap += 1 -> 2
    assert(defmutmap(1) == 2)
    assert(mutmap(1) == 2)
  }
  
}