Kotlin extension

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.
}

Kotlin extension

To declare an extension function, prefix its name with a receiver 
type, which refers to the type being extended. The following adds a 
swap function to MutableList<Int>:

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 vote155 views3 answers
How to initialize mutable list kotlin
Kotlin
1 vote172 views1 answer
Android studio kotlin
Kotlin
6 votes177 views1 answer
What is the difference var and val in kotlin
Kotlin
0 vote154 views1 answer
Kotlin question mark
Kotlin
0 vote178 views3 answers
How to change status bar color
Kotlin
0 vote161 views1 answer
Kotlin enum serialization
Kotlin
-1 vote189 views3 answers
Change spinner text color android kotlin
Kotlin
1 vote156 views1 answer
Kotlin not configured android studio
Kotlin
0 vote159 views10 answers
Convert kotlin code to java online
Kotlin
4 votes197 views1 answer
Kotlin remove name from an activity
Kotlin