Scala Array中_ filter map的用法示例

object S {
  def main(args: Array[String]): Unit = {
    println("scala")
    val arr: Array[Int] = Array(1, 2, 3, 4, 5, 6)
    val res: Array[Int] = arr.filter(_ % 2 == 0).map(_ * 2)
    res.foreach(println)
  }

}