LeetCode 133: Clone Graph | DFS with Hash Map in JavaScript
In this video, I solve LeetCode 133: Clone Graph using a depth-first search (DFS) approach with a Map to track visited nodes in JavaScript.
This problem is all about making a deep copy of a connected graph, even when cycles or shared nodes are involved. I explain how DFS works to traverse each node and how a hash map (or JS Map) prevents infinite loops by remembering what’s already cloned.
This solution is efficient, interview-safe, and easily extendable to BFS if needed.
P.S. I said children a lot, I mean neighbors.
What You’ll Learn:
✅ How to clone a graph using DFS
✅ Why a map is needed to track visited/cloned nodes
✅ JavaScript class-based graph representation
✅ Time and space complexity explained
Chapters:
0:00 - Question
1:50 - Solution Explanation
6:30 - Code
💬 Want to see the BFS version using a queue instead of recursion? Let me know in the comments!
#leetcode #clonegraph #javascript #dfs #leetcode133 #graphproblems #deepcopy #datastructures #codinginterview #graphtraversal #cloninggraph
Видео LeetCode 133: Clone Graph | DFS with Hash Map in JavaScript канала Crappy Coder
This problem is all about making a deep copy of a connected graph, even when cycles or shared nodes are involved. I explain how DFS works to traverse each node and how a hash map (or JS Map) prevents infinite loops by remembering what’s already cloned.
This solution is efficient, interview-safe, and easily extendable to BFS if needed.
P.S. I said children a lot, I mean neighbors.
What You’ll Learn:
✅ How to clone a graph using DFS
✅ Why a map is needed to track visited/cloned nodes
✅ JavaScript class-based graph representation
✅ Time and space complexity explained
Chapters:
0:00 - Question
1:50 - Solution Explanation
6:30 - Code
💬 Want to see the BFS version using a queue instead of recursion? Let me know in the comments!
#leetcode #clonegraph #javascript #dfs #leetcode133 #graphproblems #deepcopy #datastructures #codinginterview #graphtraversal #cloninggraph
Видео LeetCode 133: Clone Graph | DFS with Hash Map in JavaScript канала Crappy Coder
clone connected graph js clone graph explained js clone graph javascript clone graph recursion javascript dfs graph clone dfs vs bfs clone graph graph cloning interview graph problems javascript javascript deep copy graph leetcode 133 solution leetcode dfs problems leetcode graph dfs solution map to avoid cycles
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Информация о видео
16 мая 2025 г. 15:36:58
00:09:06
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