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

1 vote263 views1 answer
Kotlin mutable list to json
Kotlin
-2 votes246 views1 answer
Regex for email validation extended version
Kotlin
1 vote261 views1 answer
Android long to duration string
Kotlin
2 votes255 views1 answer
Kotlin read all inputstream
Kotlin
0 vote250 views1 answer
Kotlin with
Kotlin
0 vote187 views1 answer
Mutable parameters kotlin
Kotlin
1 vote253 views1 answer
Getsystemservice in fragment kotlin
Kotlin
0 vote273 views2 answers
Kotlin while loop
Kotlin
0 vote282 views1 answer
Kotlin collection to linked list
Kotlin
0 vote271 views1 answer
Kotlin for i in range how to get index value of i
Kotlin