kotlin-stdlib / kotlin.sequences / orEmpty

orEmpty

Common
JVM
JS
Native
1.3
fun <T> Sequence<T>?.orEmpty(): Sequence<T>
(source)

Returns this sequence if it's not null and the empty sequence otherwise.

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val nullSequence: Sequence<Int>? = null
println(nullSequence.orEmpty().toList()) // []

val sequence: Sequence<Int>? = sequenceOf(1, 2, 3)
println(sequence.orEmpty().toList()) // [1, 2, 3]
//sampleEnd
}