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

8 votes440 views2 answers
Kotlin string to int
Kotlin
4 votes319 views2 answers
Try catch kotlin
Kotlin
1 vote352 views1 answer
Install kotlin
Kotlin
7 votes498 views4 answers
Coroutines kotlin android dependency
Kotlin
0 vote332 views3 answers
How to initialize mutable list kotlin
Kotlin
0 vote344 views1 answer
Kotlin repeat n times
Kotlin
0 vote349 views1 answer
Android studio increment string
Kotlin
0 vote469 views1 answer
Kotlin redundant FindViewById
Kotlin
0 vote332 views1 answer
PropertyCopy from one object to another in kotlin
Kotlin
0 vote380 views1 answer
Kotlin for i in range how to get index value of i
Kotlin