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I built a sports card scanner that shows you the actual e Bay sold comps
40+ min ago (679+ words) I'm a solo dev who spent the last 6 months building a sports card scanner app from scratch. Along the way I hit an interesting problem: every existing scanner on the market gives different prices for the same card, and almost…...
5 Performance Mistakes Quietly Slowing Down Your Next. js Site (and How to Fix Each One)
38+ min ago (642+ words) Next. js gives you a fast site almost for free. The framework does a lot of heavy lifting out of the box, which is exactly why most performance problems aren't dramatic. There's no error, nothing crashes. Your Lighthouse score just…...
The Oracle and the Wolf: I Made Gemini Lose Like a Kid "
23+ min ago (826+ words) How I used Gemini in Save the Sun: it reads players' plain-language questions and plays a Norse wolf tuned to lose like a kid'never to cheat. DEV June Game Jam 2026 entry. Tagged with devchallenge, gamechallenge, gamedev, gemini....
Neural Networks with Py Torch and Lightning AI Part 5: Final Results and GPU Acceleration
26+ min ago (20+ words) In the previous article, we saw how we automated several manual pieces when training a neural. .. Tagged with ai, machinelearning....
Cursor vs Git Hub Copilot vs Windsurf " Which AI Coding Tool Wins in 2026?
30+ min ago (226+ words) If you write code in 2026, you've had this argument: Cursor, Git Hub Copilot, or Windsurf? They look similar on the surface, but they're built on genuinely different philosophies " and picking the wrong one means fighting your editor instead of shipping....
Feature Flags at Scale: Designing a Distributed Control System for Production Behavior
30+ min ago (905+ words) Most engineers first encounter feature flags as a simple abstraction: a key-value lookup that returns true or false. That mental model works fine for a single service handling a few hundred requests per minute. It becomes actively dangerous at scale....
" Project Showcase: Carbon Footprint Tracker
30+ min ago (134+ words) As developers, we have the opportunity to build technology that not only solves problems but also creates awareness about important global challenges. This project was a great experience in combining technology, user experience, and sustainability into a single application. " Carbon…...
N-th root of a number | Binary Search on Answer
42+ min ago (6+ words) . .. Tagged with algorithms, interview, java, tutorial....
Median in a Row Wise Sorted Matrix | Binary Search on Answer
42+ min ago (179+ words) Given a row-wise sorted matrix of size N " M, find the median of the matrix. The matrix contains an odd number of elements. In an interview, you can explain it like this: Since every row is sorted, one straightforward approach…...
What building HIPAA-compliant lakehouses taught me about real-world encryption
41+ min ago (672+ words) Eighty-two percent of data breaches in healthcare don't happen because of a sophisticated nation-state actor; they happen because a junior engineer accidentally left an S3 bucket open or pushed a cleartext JSON blob containing social security numbers to a shared staging…...