scala函数式编程--map和filter

package day3

object demo_high_func {
    def main(args: Array[String]): Unit = {
        val list = Array(1,2,3,4,5,6,7,8)
        // 过滤数组中的元素， 将为true的元素组合成一个新的数组
        val list2 = list.filter(e=>e%2==0)
        println(list2.mkString("[",",","]"))

        // map函数,对每个元素操作,组合成一个新集合
        println("-" * 40 + "map" + "-" * 40)
        val list3 = list.map(n=>n * 10)
        println(list3.mkString("[",",","]"))

    }

}