【Kotlin】配列・List・Set・Mapを使用してみる

fun main(args: Array<String>) {
	// int[] array = {10, 20, 30};
	val array = arrayOf(10, 20, 30)
	array[2] = 100
	for (i in array) {
		println(i)
	}
}

fun main(args: Array<String>) {
	// String[] array = {"10", "20", "30"};
	val array = arrayOf("10", "20", "30")
	array[2] = "100"
	for (i in array) {
		println(i)
	}
}

fun main(args: Array<String>) {
  // val list = listOf<Int>(10 , 20 ,30)
	val list = mutableListOf<Int>(10 , 20 ,30)
	list[0] = 100 //要素の書き換え
	list.add(40) //要素の追加
	list.remove(20) //要素の削除
	for (v in list) {
		println(v)
	}
}

fun main(args: Array<String>) {
//	val set = setOf<Int>(10 , 20 ,30, 10)
	val set = mutableSetOf<Int>(10 , 20 ,30, 10)
//	set[0] = 100 //要素の書き換え
	set.add(40) //要素の追加
	set.remove(20) //要素の削除
	for (v in set) {
		println(v)
	}
}

fun main(args: Array<String>) {
//	val map = mapOf<String, Int>("apple" to 100, "orange" to 120, "banana" to 130)
	val map = mutableMapOf<String, Int>("apple" to 100, "orange" to 120, "banana" to 130)
	map.put("grape", 140)
	map.remove("apple")
	for (key in map.keys) {
		println(key)
	}
	for (value in map.values) {
		println(value)
	}
	for (e in map.entries) {
		print(e.key)
		println(e.value)
	}
}