Scala 中反向遍历数组的俩种方式

循环步长

def main(args: Array[String]): Unit = {
        println(10 to 1 by -1)
        //Range(10, 9, 8, 7, 6, 5, 4, 3, 2, 1)
    }

API——Reverse

def main(args: Array[String]): Unit = {
        (1 to 10) .reverse.foreach(println)
        //10 9 8 7 6 5 4 3 2 1

    }