kotlin - compartor 예제

fun comp(s: String, b: String): Int {
        return if(s+b > b+s) -1
        else 1

    }
    fun solution(numbers: IntArray): String {

        val dd = numbers.map { it.toString() }.sortedWith(comparator = Comparator { o1, o2 ->  comp(o1, o2)}).fold(""){ acc, str -> acc + str}
        return dd
    }
}