orEmpty

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val nullCollection: Collection<Any>? = null
println(nullCollection.orEmpty()) // []

val collection: Collection<Char>? = listOf('a', 'b', 'c')
println(collection.orEmpty()) // [a, b, c]
//sampleEnd
}

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val nullList: List<Any>? = null
println(nullList.orEmpty()) // []

val list: List<Char>? = listOf('a', 'b', 'c')
println(list.orEmpty()) // [a, b, c]
//sampleEnd
}

import kotlin.test.*

fun main(args: Array<String>) {
//sampleStart
val nullArray: Array<Any>? = null
println(nullArray.orEmpty().contentToString()) // []

val array: Array<Char>? = arrayOf('a', 'b', 'c')
println(array.orEmpty().contentToString()) // [a, b, c]
//sampleEnd
}

import kotlin.test.*
import java.util.*

fun main(args: Array<String>) {
//sampleStart
val nullMap: Map<String, Any>? = null
println(nullMap.orEmpty()) // {}

val map: Map<Char, Int>? = mapOf('a' to 1, 'b' to 2, 'c' to 3)
println(map.orEmpty()) // {a=1, b=2, c=3}
//sampleEnd
}