gyugyu90

val jane = User("Jane", 35)
val (name, age) = jane // 구조 분해
println("$name, $age세") // Jane, 35세

gyugyu90

val jack = User(name = "Jack", age = 1)
val olderJack = jack.copy(age = 2)

gyugyu90

data class Person(val name: String) {
    var age: Int = 0
}

fun main() {
    val person1 = Person("John")
    val person2 = Person("John")

    person1.age = 10
    person2.age = 20

gyugyu90

data class Person(val name: String) {
	var age: Int = 0 
}

gyugyu90

val rectangle = Rectangle(5.0, 2.0)
val triangle = Triangle(3.0, 4.0, 5.0)

gyugyu90

fun main() {
    val fruits = listOf("banana", "avocado", "apple", "kiwifruit")
    fruits
        .filter { it.startsWith("a") }
        .sortedBy { it }
        .map { it.toUpperCase() }
        .forEach{ println(it) }
}

gyugyu90

fun main() {
    val items = setOf("apple", "banana", "kiwifruit")
    when {
        "orange" in items -> println("juicy")
        "apple" in items -> println("apple is fine too")
    }
}

gyugyu90

fun main() {
    val items = listOf("apple", "banana", "kiwifruit")
    for (item in items) {
        println(item)
    }
}

gyugyu90

fun main() {
    for (x in 1..10 step 2) {
        print(x) //13579
    }
    println()
    for (x in 9 downTo 0 step 3) {
        print(x) //9630
    }
}

gyugyu90

fun main() {
    for (x in 1..5) {
        print(x)
    }
}