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

6 votes145 views3 answers
Kotlin sleep
Kotlin
1 vote146 views2 answers
Date to string kotlin
Kotlin
1 vote128 views2 answers
Android studio keep device awake
Kotlin
1 vote142 views1 answer
Context kotlin
Kotlin
1 vote279 views1 answer
Kotlin coroutine builders
Kotlin
1 vote157 views2 answers
Kotlin reverse list
Kotlin
0 vote148 views1 answer
Recyclerview infinite scroll kotlin
Kotlin
0 vote130 views1 answer
Contentresolver.insert in fragment
Kotlin
0 vote150 views1 answer
Empty mutable list kotlin
Kotlin
0 vote164 views1 answer
Kotlin filterisinstance
Kotlin