1d ago · 6 min read · Minesweeper looks trivial to implement until you actually start. Then you run into: guaranteed safe first click, the flood-fill cascade that reveals large empty regions, and the scaling problem — the
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1d ago · 32 min read · TLDR: Big O notation describes how an algorithm's resource usage grows as input size grows — not how fast it runs on your laptop. Learn to identify the 7 complexity classes (O(1) through O(n!)), derive time and space complexity by counting loops and ...
Join discussion1d ago · 30 min read · TLDR: Probabilistic data structures — Bloom Filters, Count-Min Sketch, HyperLogLog, and Cuckoo Filters — trade a small, bounded probability of being wrong for orders-of-magnitude better memory efficiency and O(1) speed. Bloom filters answer "definite...
Join discussion2d ago · 8 min read · Some problems cannot be solved faster no matter how clever you are. That is not a reflection on your skill. It is a property of the problem. Knowing which problems fall into that category is one of th
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4d ago · 7 min read · The Problem Nobody Talks About You have a microservices architecture with 50 services. A deployment went sideways and you need to figure out which service is the single point of failure, which groups of services are tightly coupled, and which service...
Join discussion6d ago · 5 min read · Imagine that you are using Google Maps while you are driving somewhere, and suddenly there's a road blockage. In this case Google Maps quickly reroutes and gives a new route where there is no blockage
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Mar 30 · 14 min read · Most people solve algorithms by trial and error. Write code, run tests, tweak, repeat. Eventually it passes. They move on. But they can't tell you why it passed. And when the next problem looks slightly different — same pattern, different wrapping — ...
Join discussionMar 30 · 4 min read · Last year I set out to build a cafe discovery platform. The dataset I ended up with was 440,000 cafes across 195 countries. The first question was obvious: how do you rank them? Star ratings are broken. A 4.2 on Google Maps tells you almost nothing —...
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