Scala 可變map與不可變map互轉

object test2 {
  def main(args: Array[String]): Unit = {
    val im = scala.collection.immutable.Map(1->"one",2->"two") //不可變map
    val imh = scala.collection.immutable.HashMap(1->"one",2->"two") //不可變hashmap
    val mu = scala.collection.mutable.Map(1->"one",2->"two") //可變map
    println(im,manOf(im))
    println(imh,manOf(imh))
    println(mu,manOf(mu))

    //mutable.Map to immutable.Map
    val mui = mu.toMap
    println(mui,manOf(mui))

    //immutable.Map to mutable.Map
    val immu = scala.collection.mutable.Map(im.toSeq:_*)
    println(immu,manOf(immu))
    val imhmu = scala.collection.mutable.Map(imh.toSeq:_*)
    println(imhmu,manOf(imhmu))

  }

  //查看數據類型方法-manOf(data)
  def manOf[T:Manifest](t:T):Manifest[T]=manifest[T]
}

注意：

-.toSeq:將元組List轉換成mutable.Map

-:_*:表示變長參數