kotlin-stdlib / kotlin.collections / filterNotNullTo

filterNotNullTo

Common

JVM

Native

1.0

fun <C : MutableCollection<in T>, T : Any> Array<out T?>.filterNotNullTo(
    destination: C
): C

(source)

fun <C : MutableCollection<in T>, T : Any> Iterable<T?>.filterNotNullTo(
    destination: C
): C

(source)

Appends all elements that are not null to the given destination.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val numbers: List<Int?> = listOf(1, 2, null, 4)
val nonNullNumbers = mutableListOf<Int>()

println(nonNullNumbers) // []

numbers.filterNotNullTo(nonNullNumbers)

println(nonNullNumbers) // [1, 2, 4]
//sampleEnd
}