kotlin-stdlib / kotlin.collections / filterNotNull

filterNotNull

Common
JVM
JS
Native
1.0
fun <T : Any> Array<out T?>.filterNotNull(): List<T>
(source)
fun <T : Any> Iterable<T?>.filterNotNull(): List<T>
(source)

Returns a list containing all elements that are not null.

import kotlin.test.*

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

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