kotlin-stdlib/kotlin.collections/filterNotNullTo

filterNotNullTo

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.

Since Kotlin

1.0

Samples

import kotlin.test.*

fun main() { 
   //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
}