Web Reference: Jul 23, 2025 · JavaScript provides a built-in array method called reverse () that reverses the elements of the array in place. This method mutates the original array and returns the reversed array. I was asked recently what was the most efficient way to reverse an array in JavaScript. At the moment, I suggested using a for loop and fiddling with the array but then realized there is a native Array.reverse() method. Reverse an array interview question explained. In this short video, you will learn how to reverse an array without mutating the original array and achieve O (n) time complexity.
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