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 vote124 views1 answer
Btn click kotlin
Kotlin
-1 vote126 views1 answer
Kotlin time hours
Kotlin
0 vote142 views1 answer
Kotlin gradle resources folder
Kotlin
2 votes56 views2 answers
How to navigate to last back stack in android studio
Kotlin
3 votes103 views1 answer
Fragment back pressed kotlin
Kotlin
0 vote143 views3 answers
While loop kotlin
Kotlin
0 vote116 views1 answer
Kotlin iterate 1 to 10
Kotlin
1 vote107 views2 answers
Kotlin date to string
Kotlin
0 vote115 views1 answer
Button kotlin
Kotlin
0 vote111 views2 answers
Kotlin filter map by key
Kotlin