Kotlin Data Structure

배열과 리스트의 차이 [참고]

 

 

Arrays 

var contacts = arrayOf("John", "James", "Amy")

---

List & MutableList (참고)

List : Read Only 

MutableList : Read and Write

val mulist1: MutableList<Int> = mutableListOf(10, 20, 11, 23, 55)
val mulist2 = mutableListOf(10, 20, 30);
val mulist3 = (1..50).toMutableList()
val mulist4 = mutableListOf<Int>()
val mulist5 = MutableList<Int>(5, { i -> i})

val mulist: MutableList<Int> = mutableListOf<Int>(10, 20, 11, 23, 55)
mulist.add(500) //output : 10, 20, 11, 23, 55, 500
mulist.add(3, 111) //output : 10, 20, 11, 111, 23, 55, 500
val list = listOf<Int>(1, 2, 3)
mulist.addAll(2, list)  //output : 10, 20, 1, 2, 3, 11, 111, 23, 55, 500

mulist.clear()  //output : null

Map 

val menu = mapOf()
val menu = mutableMapOf()
menu.put(string, object) 
menu[string] = object