Bubble Sort in Kotlin

BubbleSort.kt

object BubbleSort {

    fun sort(array: Array<Int>) {
        for (i in array.indices) {
            for (j in 0 until array.size - i - 1) {
                if (array[j] > array[j + 1]) {
                    swap(array, firstIndex = j, secondIndex = j + 1)
                }
            }
        }
    }

    private fun swap(array: Array<Int>, firstIndex: Int, secondIndex: Int) {
        val temp: Int = array[firstIndex]
        array[firstIndex] = array[secondIndex]
        array[secondIndex] = temp
    }
}