Blog

Notes on data structures & algorithms, system design, and things I learn along the way.

Learning DSA? Follow the structured path — ordered articles from recursion to dynamic programming.→
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July 7, 2026Type Coercion and Equality: Making Sense of == in JavaScript5 min read

Why [] == ![] is true and other coercion puzzles — the actual rules behind == , truthiness, and the handful of habits that keep them from biting.

#JavaScript
July 6, 2026Binary Search and BSTs: Halving Your Way to O(log n)5 min read

How binary search eliminates half the problem with every comparison, and how binary search trees turn the same idea into a data structure — with interactive animations.

#DSA
July 6, 2026Closures in JavaScript: Private State, Loops, and Stale Values5 min read

What a closure actually is, how the scope chain makes it work, and the three places closures matter most — private state, the classic loop bug, and React hooks.

#JavaScript
July 6, 2026Debounce vs Throttle: Taming Event Storms in JavaScript4 min read

An interactive guide to debouncing and throttling — when to use each, how to implement them from scratch, and the edge cases that bite in production.

#JavaScript
July 6, 2026Hash Maps Under the Hood: Why O(1) Comes With an Asterisk5 min read

How hash maps actually work — hashing, buckets, collisions, and resizing — with an animated walkthrough and a from-scratch implementation.

#DSA
July 6, 2026The JavaScript Event Loop: How Async Actually Works10 min read

A visual, step-by-step guide to the event loop — call stack, task queue, microtasks, and async/await — with interactive animations you can play through.

#JavaScript
July 6, 2026JavaScript Promises in Depth: Chaining, Errors, and Combinators10 min read

The rules that make promises predictable — state transitions, how .then chains really resolve, error propagation, and when to reach for all, allSettled, race, or any.

#JavaScript
July 6, 2026Building an LRU Cache From Scratch4 min read

Why the classic interview question is really a lesson in composing data structures — with an animated walkthrough and two working implementations.

#DSA#System Design
July 6, 2026Rate Limiting Algorithms: Token Bucket, Windows, and Their Trade-offs10 min read

How APIs decide who gets throttled — token bucket, fixed and sliding windows, animated demos of each, and what changes when the limiter goes distributed.

#System Design
July 6, 2026WebSockets vs SSE vs Polling: Choosing a Real-Time Strategy4 min read

Four ways to get server data to the browser without a refresh — animated message flows for each, and a decision guide drawn from building live-data UIs.

#System Design

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