[Youtube DiMo] 26강. Set / Map

[26강] https://youtu.be/TXa-o5rwT2U

 

1. Set

fun main() {
    val a = mutableSetOf("귤", "바나나", "키위")
    
    for(item in a) {
        println(item)
    }
    
    a.add("자몽")
    println(a)
    
    println(a.contains("바나나"))
    
    a.remove("바나나")
    println(a)
    
    println(a.contains("바나나"))
}

귤
바나나
키위
[귤, 바나나, 키위, 자몽]
true
[귤, 키위, 자몽]
false

 

 

2. Map

fun main() {
    val lockerRoom = mutableMapOf(123 to "김철수",
                                  345 to "홍길동",
                                  5252 to "임꺽정")
    
    println(lockerRoom)
    
    for(entry in lockerRoom) {
        println(entry)
    }
    
    println(lockerRoom[5252])
    
    lockerRoom.put(999, "김개똥")
    println(lockerRoom)
    
    lockerRoom.remove(345)
    println(lockerRoom)
}

{123=김철수, 345=홍길동, 5252=임꺽정}
123=김철수
345=홍길동
5252=임꺽정
임꺽정
{123=김철수, 345=홍길동, 5252=임꺽정, 999=김개똥}
{123=김철수, 5252=임꺽정, 999=김개똥}