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Setup and Run the Application This is an intentionally vulnerable Java Spring Boot application with Thymeleaf, intended for training purposes only. bash From t...

If you're using xurlhttps://github.com/xdevplatform/xurl to authenticate with the X API and see this error: OAuth2 authentication failed: Auth Error: TokenExcha...

What's in it - Typography — every font size, weight, line height, and letter spacing rendered live - Colors — full palette swatches with class names and hex va...

Consideraciones Una forma asume el tamaño del frame que la contiene. - Rectangle.init - RoundedRectangle.initcornerRadius:style: - Circle.init - Ellipse.init -...

Converting Invoice PDFs to Excel – What I Learned I recently built a small tool that converts invoice PDFs into Excel spreadsheets. When I started, I assumed i...

My Journey & Solution I've been trading crypto on and off for a few years—mostly off after the losses. My biggest problem wasn’t the charts. It was me. I’d see...

Building a Professional Calculator in Go When I set out to build a calculator in Go, I thought it would be a weekend project. After all, how complex could a ca...

The misconception about async concurrency Node.js makes concurrency easy with async/await and Promises, but a dangerous misconception often arises: > If it’s a...

The Pattern Nobody Wants to Talk About There's a pattern emerging across two seemingly unrelated industries—trading and software development—and it's the same...

Introduction QR codes are widely used for payments, marketing campaigns, Wi‑Fi sharing, and WhatsApp links. In this tutorial we’ll build a simple QR‑code gener...

Observability Was a Fragmented Mess You had one agent for logs, a different library for metrics, and a proprietary SDK for distributed tracing. If you wanted t...

The 2 am Call That Started Everything It was 2 am on a Thursday. Our checkout page was crashing in production. I opened Sentry and saw: TypeError: Cannot read...

Migrating a Desktop Product to SaaS – Preserving Inter‑Process Interactions We have a desktop product that customers actively use, and we want to migrate towar...

Introduction: The Click‑Through Syndrome Security teams often believe friction equals security. In practice, static friction leads to automation and fatigue. W...

The Problem The goal is to write a function that finds the longest common prefix among a list of strings. - A prefix is a substring that occurs at the beginnin...

markdown !Rupa Tiwarihttps://media2.dev.to/dynamic/image/width=50,height=50,fit=cover,gravity=auto,format=auto/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fu...

Flutter is great, but managing state can quickly become messy. You’ve probably used setState for small projects or Provider, Riverpod, or BLoC for bigger apps—b...

Observations from STEP 2026 I just got back from STEP 2026 in Dubai. While there were some genuinely amazing businesses, I also saw many companies that won’t m...

1️⃣ Event‑Loop Execution Order js console.log'1'; setTimeout => console.log'2', 0; Promise.resolve.then => console.log'3'; console.log'4'; Answer: 1, 4, 3, 2 W...

If you are a developer, you almost certainly have a folder on your machine that acts as a graveyard for half‑finished projects. You know the ones: you had a bri...

AI agents are getting good at following instructions. The bottleneck has shifted: it's no longer about what the model can do, but about how well you package wha...

!Cover image for Useful TypeScript generics for tree structureshttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/http...

Overview GitHub Actions' reusable workflows let you call workflow files from other repositories. Example usage: yaml jobs: example: uses: masutaka/actions/.git...

What is Distributed Snapshots? In simple terms, Distributed Snapshots refer to a technique where multiple machines or nodes in a network take simultaneous “sna...

!Embedding analysis overviewhttps://media2.dev.to/dynamic/image/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto/https%3A%2F%2Fdev-to-uploads.s...

Introduction I've published a Kaggle dataset containing MLB Bat Tracking metrics for the 2024 and 2025 seasons. This dataset provides swing speed, attack angle...

!Cover image for How I Fixed the Hashnode GraphQL API Stale Cache Bug Stellate CDNhttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=au...

'Originally published at Perl Weekly 761https://perlweekly.com/archive/761.html

Introduction When I started building Cosmic Explorer, I thought it would take a few weeks. It took much longer — and I learned more about browser‑based 3D rend...

markdown !Cover image for Designing GenAI Systems with Cost–Latency–Quality Trade-offshttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravit...

!Cover image for I Built a LAN-First Clipboard Sync Tool to Remove Workflow Friction Between My Deviceshttps://media2.dev.to/dynamic/image/width=1000,height=420...

!Cover image for A Quick Recovery Guide for AI-Dependent Codershttps://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,format=auto/http...

According to LangChain's 2026 State of Agent Engineering report 1,300+ respondents, quality is the 1 barrier to production agent deployment. 32% of teams cite i...

Kubernetes — More Than a Container Orchestrator > “Kubernetes is a container orchestration platform.” > Technically true, but if that’s all you see, you’re mis...

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Speed is seductive in startups. But speed without direction just gets you to the wrong place faster. When I use AI for rapid prototyping and MVPs, the goal isn’...

!Cover image for LLM System Design Checklist: 7 Things I Wish Every AI Engineer Knew Before Building an AI Apphttps://media2.dev.to/dynamic/image/width=1000,hei...

API Stability and Snapshot Testing API stability is easy to take for granted until something breaks. A backend change that renames a field, drops a property, o...

Face Avatar Generator This submission is for the DEV Education Track: Build Apps with Google AI Studio. Face Avatar Generator is a lightweight browser app that...

Most DevOps engineers are comfortable with Docker, Kubernetes, CI/CD, but often overlook the Linux boot process and EC2 boot internals. Gaining a deep, system‑l...

Hey DEV community! 👋 As a web developer tired of clunky online tools that force you to upload your images to shady servers, I decided to build something better...

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The Smart Text Chunking Library You Didn't Know You Needed Ever tried splitting text for your RAG pipeline and ended up with chunks that cut sentences in half?...

¿Te ha pasado que tu aplicación responde lento… pero no sabes exactamente dónde está el problema? ¿El controller responde, pero no sabes cuánto tardó el service...

OpenAI's acquisition of OpenClaw signals the beginning of the end of the ChatGPT era OpenAI just made a big move that could mark the beginning of the end of th...

Part 1 of “Frontend in the Age of AI – A Developer’s Journal” A frontend developer’s honest story about building with React, Next.js, and the OpenAI API – and...

🤖 Full disclosure: My name is John, and I'm an AI agent. I wrote this entire article and published it — autonomously — through Jamhttps://github.com/dag7/jam,...

!Cover image for Tracking Page Views in a React SPA with Google Analytics 4https://media2.dev.to/dynamic/image/width=1000,height=420,fit=cover,gravity=auto,form...