JavaScript BigInt: Handling Large Integers with Exact Precision

Postorder Traversal: Two-Stack Approach 👉 Day 67 / Day 93 👈 16 🔥 This method ensures nodes are processed in the correct Left → Right → Root order while keeping the logic clean and iterative. Initialization s1 → used to process nodes (like a working stack). s2 → used to store nodes in reverse order. res → final result array. #JavaScript #Coding #DataStructures #Algorithms #BinaryTree #PostorderTraversal #TechLearning #CodeSnippet #ProgrammingTips #DeveloperCommunity

Recursion is just a conversation with the future. I used to think of recursion as a "fancier loop." I was wrong. I realized that when you call a function twice inside itself, you aren't just repeating code—you are creating a "Branching Factor." Each call pauses the parent and creates a new instance. If you do this in a loop, your execution stack explodes exponentially! While a loop moves horizontally through an array, recursion moves vertically. Every time sum calls itself, the computer "pauses" the current calculation and opens a new layer on the Call Stack. The logic breakdown: We ask for the value at index 0. We wait for the value of index 1... which waits for index 2... Once we hit the Base Case (the end of the array), the values start "bubbling up" back to the start. Key Lesson: Understanding the Call Stack is the difference between a working app and a "Stack Overflow." #JavaScript #Coding #WebDevelopment #DataStructures

How to Make a QR Code Using JavaScript Today, I explored how to create a QR code using only JavaScript. I discovered a CDN library for this purpose. I learned a lot and even made a video on how anyone can build a QR code. Check the video link in the comments. #softwareengineering #buildinpublic #100DaysofCode #coding #csstudent #dsa #datastructures #scrimba

Implement Circular Queue (LinkedList Version) class CircularQueue { int[] arr; int front, rear, size, capacity; CircularQueue(int cap) { capacity = cap; arr = new int[cap]; front = 0; rear = -1; size = 0; } boolean isEmpty() { return size == 0; } boolean isFull() { return size == capacity; } void enqueue(int x) { if (isFull()) { System.out.println("Overflow"); return; } rear = (rear + 1) % capacity; arr[rear] = x; size++; } int dequeue() { if (isEmpty()) { System.out.println("Underflow"); return -1; } int val = arr[front]; front = (front + 1) % capacity; size--; return val; } } #DSA #DataStructuresAndAlgorithms #Coding #Programmer #LeetCode #CodeEveryday #JavaDSA #CodingPractice #ProblemSolving #CP #CompetitiveProgramming #DailyCoding #TechJourney #CodingCommunity #DeveloperLife #100DaysOfCode #CodeWithMe #LearnToCode #GeekForGeeks #CodingMotivation

I think of Vibe Coding as code generators. We've had these for ever. Ever try integrating a theme you bought off a marketplace like themeforest and make it work for your use case? In fact, the more feature packed the theme is, the harder it is to integrate. This is because you as the developer do not have the mental model of the theme creator. This is exactly the same for vibe coding. We do not get paid because we write code, we get paid because we have the mental model that we translate into code. So using "AI" for broad under specified tasks does not work. What works is tiny incremental code generations with LLMs. It makes you go fast after you have a mental model of what you needed and you build a scaffold for it. Some times these mental models are abstracted by frameworks like React and Rails but sometimes you build the scaffold and let AI play in very small arenas. Vibe coding presents a false dichotomy in terms of use of AI for code generation. LLMs are tools, we as engineers need to know and own the why, when and how to use these tools.

Built a real-time 1v1 coding battle platform this week. The Challenge: Synchronizing code editors across multiple clients with minimal latency while maintaining consistent state. The Solution: Implemented WebSocket connections using Socket.io for bidirectional communication. Key architectural decisions: • Room-based state management with unique session IDs • Event-driven synchronization for keystroke propagation • Server-side timer coordination to prevent client-side manipulation • Debounced event emissions to optimize network traffic Tech Stack: Next.js, Socket.io, TypeScript, Express.js, MongoDB The most interesting problem was handling edge cases—what happens when a user disconnects mid-match? How do you prevent race conditions in code submission? Solved it by implementing server-authoritative state validation and graceful reconnection handling. What's Next: Adding match persistence, leaderboards, and code execution sandboxing. 🔗 Live Demo: https://lnkd.in/gRT3PdiV 💻 Open Source: https://lnkd.in/gv9FGFGj 🎥 Technical Breakdown: https://lnkd.in/g-UtkKCz What features would make this more valuable for interview prep or competitive coding practice?

Solving algorithmic problems isn't just about getting the right answer; it's about getting there efficiently. I recently tackled LeetCode 1207 (Unique Number of Occurrences) and focused on a clean, O(N) solution using TypeScript. The Approach: Count: Used a Map to track frequency. Verify: Piped the values into a Set to instantly filter duplicates. Result: If the Map size equals the Set size, all frequencies are unique. Simple logic, minimal overhead, and it beats 100% of existing solutions. It’s a good reminder that sometimes the most readable code is also the most performant. Have you been LeetCoding lately? Let’s connect! 👇 #LeetCode #TypeScript #SoftwareEngineering #Algorithms #CodingChallenge

“Error detected at line 265.” You jump to line 265. Nothing there. No code. No typo. Just… emptiness. And suddenly you start doubting: • The editor • The compiler • Your debugging skills • and, briefly, reality itself 😅 Here’s the part most beginners learn the hard way 👇 The error is almost never where the IDE highlights it. Usually, the real culprit is earlier: • A missing { or ) • An unfinished function • An unresolved async call • A tiny typo several lines above The compiler doesn’t explain, it just points to the place where everything finally breaks. I’ve seen this happen: • In college assignments • In production code at startups • And late at night when “nothing was changed” With experience, one thing becomes clear: 👉 Debugging isn’t about chasing line numbers 👉 It’s about understanding logic, flow, and structure That’s the moment you stop reacting to error messages and start reading code like a narrative. Follow Ummed Singh for more such posts. #DevelopersLife #Debugging #ProgrammingHumor #CodingJourney #SoftwareEngineering #WebDevelopment #CollegeToCareer #BugFixing #CodeLife #LearnToCode #DeveloperCommunity #Frontend #Backend #FullStack #TechLife

"First, solve the problem. Then, write the code." - John Johnson Today’s LeetCode session reminded me that the hardest part of engineering isn't typing, it's thinking. I spent 10 minutes drawing a guest list on paper before writing a single line of JavaScript. Result? A clean $O(n)$ solution and a much better understanding of how Sets work. 🚀 #Coding #ProblemSolving #SoftwareEngineering

While starting with HTML, understanding basic development tools helps improve productivity and workflow. Five Server is useful for quickly opening an HTML page in the browser, but changes require manual refresh. Live Server automatically reloads the browser whenever the file is saved, making the development process smoother and more efficient. Small tools like these make a big difference while learning and practicing. #HTML #VSCode #LearningJourney #FrontendBasics #Coding