elementAtOrElse

Returns an element at the given index or the result of calling the defaultValue function if the index is out of bounds of this array.

inline fun <T> Array<out T>.elementAtOrElse(index: Int, defaultValue: (Int) -> T): T(source)

fun main() {
    val numbers = arrayOf(10, 20, 30)

    val value = numbers.elementAtOrElse(5) { idx ->
        "No element at index $idx, using default"
    }

    println(value)  // prints: No element at index 5, using default
}

Source