mutableListOf

kotlin-stdlib/kotlin.collections/mutableListOf

Начиная с Kotlin: 1.1

inline fun <T> mutableListOf(): MutableList<T>

Возвращает новый пустой MutableList.

Примеры

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   val list = mutableListOf<Int>()
println("list.isEmpty() is ${list.isEmpty()}") // true

list.addAll(listOf(1, 2, 3))
println(list) // [1, 2, 3] 
   //sampleEnd
}

fun <T> mutableListOf(vararg elements: T): MutableList<T>

Возвращает новый MutableList с указанными элементами.

Примеры

import kotlin.math.*
import kotlin.test.*

fun main() { 
   //sampleStart 
   val list = mutableListOf(1, 2, 3)
println(list) // [1, 2, 3]

list += listOf(4, 5)
println(list) // [1, 2, 3, 4, 5] 
   //sampleEnd
}

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https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/mutable-list-of.html