Challenge: Write an Extension Function to Reverse an Array

Problem statement

Implement an extension function, reverseArray(), for the intArray class, to reverse the order of a given array.

Sample test case

This is how we’ll test the extension function:

var array = intArrayOf(1, 3, 4, 6, 7)
array.reverse_()

Expected output

array => [7, 6, 4, 3, 1]

Business logic

The following illustration shows one of the ways to accomplishthis: