Rotate Array - Leetcode 189 - In-Place - JavaScript Solution Explained

Pubblicato il: 22 novembre 2025
sul canale di: Web Coder Abhishek

343

In this tutorial, solve Leetcode 189: Rotate Array with a fast, in-place reversal technique in JavaScript.
Given an array and a number k, rotate the array to the right by k steps—modifying the array in place for optimal space and time.
What you'll learn: Why brute force is inefficient

How to use the reversal algorithm for O(n) complexity
Handling edge cases and large kStep-by-step code, dry runs, and performance tips
📌 Example:
Input: nums = [1,2,3,4,5,6,7], k = 3
Output: [5,6,7,1,2,3,4]
Master array manipulation for interviews and real-world coding with this elegant technique!

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Keywords:
leetcode 189
rotate array
in-place array rotation
javascript solution
reverse algorithm js
efficient array rotation
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array manipulation js
modify array
js data structures
dsa javascript
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Hash tags:- #leetcode #javascript #dsa #coding #programming #reactjs

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