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 vote95 views1 answer
How to calculate date in kotlin
Kotlin
1 vote137 views1 answer
How to do flip horizontal for ImageView kotlin
Kotlin
1 vote128 views1 answer
Date format kotlin
Kotlin
2 votes141 views1 answer
Settext kotlin
Kotlin
3 votes137 views1 answer
Kotlin convert string to char array
Kotlin
1 vote138 views1 answer
Any in kotlin
Kotlin
0 vote132 views1 answer
Create array of array in kotlin
Kotlin
0 vote145 views1 answer
Var and val in kotlin
Kotlin
8 votes228 views2 answers
SetOnLongClick in android kotlin
Kotlin
1 vote131 views1 answer
Kotlin set environment variable
Kotlin