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

Опубликовано: 22 Ноябрь 2025
на канале: Web Coder Abhishek

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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
optimal js code
array manipulation js
modify array
js data structures
dsa javascript
coding interview js
array reversal trick

Hash tags:- #leetcode #javascript #dsa #coding #programming #reactjs

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