firstOrNull
Returns the first element, or null if the array is empty.
fun <T> Array<out T>.firstOrNull(): T?(source)
fun main() {
val numbers = arrayOf(10, 20, 30)
val firstNumber = numbers.firstOrNull()
println(firstNumber) // 10
val emptyArray = arrayOf<String>()
val firstEmpty = emptyArray.firstOrNull()
println(firstEmpty) // null
}