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Composition over Inheritance Atharv Rawat Atharv Rawat Atharv Rawat ...

A follow-up to Java Records deserve a mapper My earlier post introduced Immuto and made the general case for a mapper designed around Records from day one. This one is narrower and more specific: it walks through exactly where MapStruct , which is the mapper most Java teams already use, runs into friction with Records, with real annotations and real generated code on both sides. MapStruct is excellent. It’s been the go-to compile-time mapper for a decade, and it has supported Records ...

Why I Built This Every Spring Boot project I started, I spent the first 2–3 weeks building the exact same things: JWT authentication Email verification Forgot password flow Google OAuth2 integration Docker setup CI/CD pipeline That is weeks of work before writing a single line of my actual product. So I packaged all of it into SpringLaunch API — a production-ready Spring Boot 4.1.0 boilerplate. Here are the biggest lessons I learned while building it. ...

Mastering FastAPI: A Complete Learning Roadmap prasanna Kumar prasanna Kumar prasanna Kumar ...

from https://www.kmwebdev.me/blog/night-of-the-living-bugs At 4 AM, the CI pipeline wasn’t broken. It was confused. What I thought was a simple automated check had turned into a chain of small misunderstandings across multiple systems. Everything was still “working,” but the results no longer made sense. That gap between execution and understanding is where everything started to fail. The system I thought I was building The goal was simple: run automated checks on a webs...

Email verification looks easy until you try to prove it works repeatably in CI. The happy path is obvious: create user, send email, click link, mark account verified. The fragile part is everything between the Node.js handler, the PostgreSQL transaction, and the mailbox your test inspects. In backend teams, I see the same mistake again and again: people confirm that an email showed up, then assume the auth flow is covered. It is not. A reliable test has to connect one signup request to one ve...

Me and my team deal with images a lot. Compress a bunch of photos for our website. Convert PNGs someone sent into WebPs. Cut out backgrounds for product shots. Turn a HEIC into something a CMS will actually accept. Convert a GIF with transparent background to animated WebP. Every one of those is a different tool. TinyPNG does compression but won't touch animated WebPs. Squoosh is nice but one file at a time. remove.bg slaps a watermark on unless you pay. CloudConvert does batch but uploads ev...

Ever installed a beta build on your phone, and it silently replaced your production app? Then you opened it, and it was logged into your production account, talking to your production API? Me too. That's the day I decided my beta and production builds needed to be two completely separate apps. The usual answer is "just use EAS build profiles." And EAS is fine, but you don't need it for this. Everything EAS does with build variants is powered by something that already lives in your project: C...

I spent my most of day's on a new team grepping through 80,000 lines of code trying to find where authentication worked. Four hours. Three teammates interrupted. Twelve dead ends across files I didn't understand. The code was fine — it was well-written, well-organized, reasonably documented. The tooling was the problem. I was using grep to understand something that wasn't a text search problem. Code has structure: call edges, import chains, type hierarchies, AST relationships. Grep ignores al...

For more than 20 years I've worked as a PHP developer, building everything from small websites to larger business applications. During that time I've worked extensively with vanilla PHP, Laravel, and Symfony. Both Laravel and Symfony are fantastic frameworks. They have large communities, mature ecosystems, and solve problems that would otherwise take months to implement yourself. This isn't an article about replacing them. It's about why I decided to build something different. The p...

How to Improve WordPress Core Web Vitals (2026) A senior developer's practical guide to improving WordPress Core Web Vitals — LCP, INP, and CLS — often without a full rebuild. amr-osama.net Most slow WordPress sites do not need a full rebuild first. They need a proper performance diagnosis. When I audit a WordPress site, I usually start with three questions: What is...

My drift detector is built on one idea: take two snapshots of your cloud, diff them, and grade what moved. A security group opened to 0.0.0.0/0 ? Critical. An RDS instance that flipped to public? Critical. A tag someone fat-fingered? Low. Every rule is a function of an old → new transition — a change happened, and I score how bad the change is. Then I went to add "your Secrets Manager secret hasn't rotated in too long" and the whole model fell over. Not because it's hard to detect. Be...

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Article URL: https://craigmod.com/essays/fast_software/ Comments URL: https://news.ycombinator.com/item?id=48792008 Points: 34 # Comments: 12

Article URL: https://jacob.gold/posts/programmers-need-to-start-meditating-now/ Comments URL: https://news.ycombinator.com/item?id=48792080 Points: 84 # Comments: 83

Article URL: https://0dd.company/galleries/triumph/1.html Comments URL: https://news.ycombinator.com/item?id=48792352 Points: 26 # Comments: 3

Article URL: https://github.com/Trystan-SA/claude-design-system-prompt Comments URL: https://news.ycombinator.com/item?id=48792399 Points: 18 # Comments: 1

Article URL: https://www.bbc.com/news/articles/cz758x04g83o Comments URL: https://news.ycombinator.com/item?id=48792780 Points: 9 # Comments: 2

Article URL: https://www.bbc.com/news/articles/c8e2j0j87reo Comments URL: https://news.ycombinator.com/item?id=48792790 Points: 39 # Comments: 5

Article URL: https://mihai.page/pi-square-is-10/ Comments URL: https://news.ycombinator.com/item?id=48793073 Points: 10 # Comments: 4

Hey everyone, I'm starting a project called CatAI—a native AI model engine built entirely from scratch in C++. I want to skip the bloated standard frameworks and write the core tensor math and memory layouts directly. Because doing a raw scratch build is complex systems work, I'm looking for other C++ devs or math nerds who want to collaborate, brain-dump architecture ideas, or help guide the backend logic. If you love bare-metal optimization, low-level memory management, or custom neur...

Query one Apache Iceberg table from Trino, Spark, and DuckDB Iceberg is useful because it lets multiple engines read the same table without copying data into engine-specific storage. The table stays in object storage. The engines differ only in how they reach the metadata. That is the part most posts skip. They explain Trino, Spark, or DuckDB in isolation, then leave you to infer how the same table behaves across all three. If you are working on a real lakehouse, that missing comparison i...

Agents with access to a SKILL.md file for a service are 4-5x more likely to successfully integrate it on the first try vs. reading raw API docs. They make fewer mistakes, waste fewer tokens, and produce better results. Your API docs were written for humans. Your SKILL.md is written for agents. You need both. So what makes a software agent ready. 1. Agent-Native Payments Agents don't have wallets. They don't have credit cards. They can't fill out billing forms. But they CAN: Pay per ...

I subscribe to about 25 newsletters. For a long time my relationship with them worked like this: subscribe with genuine excitement, read the first two issues, then watch the rest pile up in Gmail until the unread count made me feel bad enough to archive everything and start over. The problem was never the newsletters. Most of them are good. The problem is that "good" and "worth my time this week" are different bars, and an inbox can't tell them apart. Every issue lands with identical urgency,...

I wanted to turn some photos into pixel art for a side project, and every online tool I found either watermarked the output, required signup, or uploaded my images to a server. So I built my own: https://imagetopixelart.top How it works (no backend at all): Downsampling — draw the image onto a small canvas ( drawImage with smoothing), where each cell becomes one "pixel". A slider controls block size from 2 to 64px. Color quantization — median-cut over the RGB space for the "...