Extension function kotlin

Kotlin extension function

fun Int.increment(): Int {
    return this+1
}
fun Boolean.invert(): Boolean {
    return xor(true) // a xor true = !a, by the conditional inversion property of xor.
}

Extension function kotlin

Kotlin provides the ability to extend a class with new functionality without 
having to inherit from the class or use design patterns such as Decorator. 
This is done via special declarations called extensions.

fun MutableList<Int>.swap(index1: Int, index2: Int) {
    val tmp = this[index1] // 'this' corresponds to the list
    this[index1] = this[index2]
    this[index2] = tmp
}

Similar codes

0 vote310 views1 answer
Kotlin run task every second
Kotlin
2 votes297 views1 answer
Print kotlin console
Kotlin
6 votes326 views2 answers
Kotlin thread
Kotlin
3 votes291 views2 answers
Create a map from list kotlin
Kotlin
2 votes306 views1 answer
Kotlin uuid
Kotlin
1 vote272 views1 answer
Kotlin runblock
Kotlin
0 vote316 views1 answer
Capitalise text kotlin
Kotlin
1 vote321 views1 answer
Koltin measureTimeMillis
Kotlin
2 votes307 views1 answer
Arraylist vs mutablelist kotlin
Kotlin
0 vote317 views1 answer
Disable button when edittext is empty kotlin
Kotlin