kotlin-stdlib/kotlin.collections/filterNotNull

filterNotNull

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.

Since Kotlin

1.0

Samples

import kotlin.test.*

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

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