kotlin-stdlib/kotlin.collections/filterNotNullTo

filterNotNullTo

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

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

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

Samples

import samples.*
import kotlin.test.*
fun main() { 
   //sampleStart 
   val numbers: List<Int?> = listOf(1, 2, null, 4)
val nonNullNumbers = mutableListOf<Int>()

assertPrints(nonNullNumbers, "[]")

numbers.filterNotNullTo(nonNullNumbers)

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