LeetCode 283: Move Zeroes In-Place | JavaScript Trick

Published: 21 June 2025
on channel: Crappy Coder

In this video, I solve LeetCode 283: Move Zeroes using a clean and efficient two-pointer approach in JavaScript.

The problem: Given an array of integers, move all the 0s to the end in-place while maintaining the relative order of the non-zero elements.

I walk through a space-efficient solution using two pointers to swap elements smartly without creating a new array.

✅ Solves the problem in O(n) time
✅ Uses O(1) extra space
✅ Beginner-friendly and great for interviews

What You'll Learn:

Two-pointer technique

In-place array operations

Edge case handling (all zeros, no zeros, zeros at front/back)

Time Complexity: O(n)
Space Complexity: O(1)

Chapters:
0:00 - Problem Breakdown
1:15 - Two Pointer Strategy Explanation
4:15 - JavaScript Code Walkthrough
6:20 - Time & Space Complexity

💬 Drop a comment if you'd like to see this solved using filtering or another approach!

#leetcode283 #movezeroes #twopointer #javascript #inplacearray #leetcodejavascript #arraymanipulation #interviewprep #codingchallenge

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