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Note: This post is a translated version of an article originally published on my personal blog. You can read the original Korean post here.
Originally published at recca0120.github.io The previous post covered DI + Fake + in-memory basics. This one takes it further, into a scenario most t
Originally published at recca0120.github.io The most common testing pattern I see looks like this: test('saves user data', () => { const mockSto
If you're still switching layouts manually in your Vue app… you're doing it wrong. Most people, especially beginners, end up writing messy logic just
What if you could just ask a smart contract questions in plain English? "What's the total supply?" → calls totalSupply() → "1,000,000 USDC" "Who is t
Turn-based multiplayer is deceptively hard. Here's how I designed a simple, fast, and cost-effective relay backend that auto reconnects dropped client
Hey DEV community! 👋 Recently, I shared how I completely rewrote the Classic ASP engine from scratch in Go to save legacy applications from Microsoft
Null was a billion-dollar mistake. Falsy was the second. "I call it my billion-dollar mistake. It was the invention of the null reference
I was building a markdown editor for my platform StringTechHub. At some point I needed to decide how to represent the document internally. I could use
After months of building admin panels from scratch for every project, I decided to build a proper starter template. Here's what I ended up with and
If you've built an LLM feature in Spring Boot, you've probably done something like this: created a @Bean with @Tool-annotated methods, wired it into y
This is a submission for Weekend Challenge: Earth Day Edition What I Built green-linter is a zero-dependency CLI tool that scans your proj
What if I told you that even if you hash passwords, an attacker might still crack them in seconds? Authentication is one of the most critical parts o
You clone a repo you've never seen before and you want to understand it. Not the code, not yet. The shape of the project. Who's been working on it? Ho
Every time Magento handles a request, it loads hundreds of PHP classes, registers thousands of event observers, and wires up a plugin chain across the
Magento deployments done wrong mean minutes of downtime, broken shopping carts, and unhappy customers. Done right, they're invisible — customers never
Varnish is the gold standard for full-page caching in front of Magento. Configured correctly, it serves the vast majority of your traffic without touc
If your Magento store is slow, the database is almost always the first place to look. A single unoptimized query running on every page load can add hu
Magento stores are high-value targets. They process payments, store customer data, and often run on shared infrastructure. A compromised store means p
Redis is table stakes for any production Magento store. But "just install Redis" is not enough — the default configuration leaves significant performa