Kotlin Extension and Infix Functions

Main.kt

fun main() {

    println(5.triple())

    val list = mutableListOf("emre", "pbu", "arg")
    list.swap(0, 1)
    println(list)

    println(5.topla(1))
    println(5 topla 1)
    println(list[0].birlestir(list[1]))
}

fun Int.triple() = this * 3

fun MutableList<String>.swap(firstIndex: Int, secondIndex: Int) {
    val temp = this[firstIndex]
    this[firstIndex] = this[secondIndex]
    this[secondIndex] = temp
}

infix fun Int.topla(value: Int): Int = this + value

infix fun String.birlestir(str: String): String = this + str