Using joinToString, removePrefix, removeSuffix and split with Kotlin

StringTest.kt

class StringTest {

    private fun stringList(){
        val ids = "[57670,57669,57668,57667,57666,57665,57664,57663,57661,57662,57659]"

        val personList = mutableListOf<Person>(
                Person("Dave", "Kingdom", 23),
                Person("Joshi", "Delete", 30),
                Person("Kora", "Rabbit", 27),
                Person("Kurt", "Banana", 30),
                Person("Jack", "Reverse", 17)
        )

        val text = "[String Test]\n" +
                "|- Date : 2017-11-01 16:30\n" +
                "|- Place : Seoul \n"

        val convertTwo = personList.joinToString(separator = "\n", prefix = text){ item->
            "name : ${item.name}, nickName : ${item.nick}"
        }

        println(getDevidedArray(ids))
        println(convertTwo)
    }

    private fun getDevidedArray(data : String):List<String>{
        return data.removePrefix("[")
                .removeSuffix("]")
                .split(",")
    }

    data class Person(
            val name : String,
            val nick : String,
            val age : Int
    )


    companion object{
        @JvmStatic fun main(args : Array<String>) {
            KotlinTest().stringList()
        }
    }
}