toLongArray
Returns an array of Long containing all of the elements of this generic array.
fun Array<out Long>.toLongArray(): LongArray(source)
val boxedArray: Array<Long> = arrayOf(1L, 2L, 3L)
val longArray: LongArray = boxedArray.toLongArray()
println(longArray.contentToString()) // prints: [1, 2, 3]