filterNotNullTo
fun <C : MutableCollection<in T>, T : Any> Array<out 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
}