【Scala】foreach方法

package spark.demo

object Demo {

  def main(args: Array[String]) {

    val m: Map[Int, String] = Map(3 -> "Python", 1 -> "Java", 2 -> "Scala", 6 -> "SQL")

    /**
      * key=3, value=Python
      * key=1, value=Java
      * key=2, value=Scala
      * key=6, value=SQL
      */
    val result = m.foreach(x => println("key=" + x._1 + ", value=" + x._2))

  }

}