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kotlin extension function

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Joyous Jellyfish answered on July 27, 2021 Popularity 10/10 Helpfulness 4/10

answer kotlin extension function

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kotlin extension function

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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.
}

Popularity 10/10 Helpfulness 4/10 Language kotlin

Source: Grepper

Tags: kotlin

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Contributed on Jul 27 2021

Joyous Jellyfish

0 Answers Avg Quality 2/10

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kotlin extension

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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
}

Popularity 10/10 Helpfulness 2/10 Language kotlin

Source: Grepper

Tags: kotlin ko

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Contributed on Nov 10 2021

android developer

0 Answers Avg Quality 2/10

extension function kotlin

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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
}

Popularity 10/10 Helpfulness 2/10 Language kotlin

Source: Grepper

Tags: extension-function extension-functio

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Contributed on Dec 03 2021

android developer

0 Answers Avg Quality 2/10

kotlin extension function

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