直接看代码

fun main(){
    val numberList1 = listOf(23, 65, 14, 57, 99, 123, 26, 15, 88, 37, 56)
    val numberList2 = listOf(13, 55, 24, 67, 93, 137, 216, 115, 828, 317, 16)
    val numberList3 = listOf(20, 45, 19, 7, 9, 3, 26, 5, 38, 75, 46)
    
    val oddNumberList = mutableListOf<Int>()
    numberList1.filterTo(oddNumberList) {
        it % 2 == 1
    }
    numberList2.filterTo(oddNumberList) {
        it % 2 == 1
    }
    numberList3.filterTo(oddNumberList) {
        it % 2 == 1
    }
    
    //需要注意一点的是，我们从源码看到filterTo第一个参数destination是一个可变集合类型，所以这里使用的mutableListOf初始化
    val evenNumberList = mutableListOf<Int>().apply {
        numberList1.filterTo(this) {
            it % 2 == 0
        }
        numberList2.filterTo(this) {
            it % 2 == 0
        }
        numberList3.filterTo(this) {
            it % 2 == 0
        }
    }
    
    print("从三个集合筛选出的奇数集合: \n")
    oddNumberList.forEach {
        print("$it   ")
    }
    println("\n")

    print("从三个集合筛选出的偶数集合: \n")
    evenNumberList.forEach {
        print("$it   ")
    }
    println("\n")

}

打印结果.png