초보자를 위한 Kotlin 200제 #3

fun returnFunc(num: Int): () -> Unit = { println(num)}

fun main(args:Array<String>) {
    val f:() -> Unit = returnFunc(30)

    f()
}

fun <T> toFunction(value: T): () -> T = { value }

fun main(args:Array<String>) {
    val func: () -> Int = toFunction<Int>(1107)

    println(func())
}

interface ValueContainer {
    fun getValue(): Int
}

class AAA : ValueContainer {
    override fun getValue(): Int = 1102
}

class BBB : ValueContainer {
    override fun getValue(): Int = 127
}

fun <T: ValueContainer> T.printValue() {
    println(this.getValue())
}

fun main(args: Array<String>) {
    AAA().printValue()
    BBB().printValue()
}

fun main(args: Array<String>) {
    val oneToTen: IntRange = 1..10
    println(5 in oneToTen)

    val upperAtoZ: CharRange = 'A'..'Z'
    if('C' in upperAtoZ) {
        println("대문자 입니다")
    }

    if('p' in 'a'..'z') {
        println("소문자 입니다")
    }
}

fun printAll(vararg tokens: String) {
    for(token in tokens) {
        print("$token ")
    }
}

fun main(args: Array<String>) {
    val numbers: Array<String> = arrayOf("What's", "your", "name?")

    printAll(*numbers)
}

fun main(args: Array<String>) {
    val list: Collection<Int> = listOf(10, 20, 10)
    val set: Collection<Int> = setOf(1,2,3,2,3)
    val map: Map<String, String> = mapOf("Apple" to "사과", "Banana" to "바나나")

    println(list)
    println(set)
    println(map)
}