1.创建映射
1)创建不可变的映射
scala> val status = Map(1 -> "a",2 -> "b") status: scala.collection.immutable.Map[Int,String] = Map(1 -> a, 2 -> b) scala> val status = Map((1,"a"),(2,"b")) status: scala.collection.immutable.Map[Int,String] = Map(1 -> a, 2 -> b)scala> val status = M
