DEV Community • 2026-04-20 08:00

Subqueries vs. CTEs and When to Use Each

SQL offers multiple ways to break down complex problems into manageable steps. Two of the most powerful tools for this are subqueries and Common Table Expressions (CTEs). While they often overlap in functionality, understanding their differences is key to writing efficient, maintainable queries. A subquery is a query nested inside another query. It executes first, and its result feeds into the ou...

0 0
2m read
Глубокий разбор архитектуры видеостриминга NYTimes: Создание высокопроизводительного движка экстракции на базе HLS и FFmpeg Введение
DEV Community • 2026-04-20 07:56

Глубокий разбор архитектуры видеостриминга NYTimes: Создание высокопроизводительного движка экстракции на базе HLS и FFmpeg Введение

Как разработчиков, нас часто захватывает то, как платформы глобального масштаба управляют распределением мультимедийных данных. The New York Times (NYTimes), ведущее мировое новостное издание, использует сложную архитектуру доставки, которая представляет собой не просто статический хостинг файлов, а высокотехнологичную систему на базе протокола HLS (HTTP Live Streaming). Для исследователей, архиви...

0 0
4m read
DEV Community • 2026-04-20 07:55

I'm a CS Student in Placement Season. I Replaced My Inbox Anxiety With 80 Lines of Markdown.

This is a submission for the OpenClaw Challenge. What I Built I built inbox-triage — a personal email triage skill for OpenClaw. It's a single SKILL.md file, 80 lines of Markdown, no code, no API keys, no deployment. When I paste email subject lines or a screenshot of my Gmail into OpenClaw, it sorts them into four buckets: 🔴 URGENT — open now (OA deadlines, interview invites, placemen...

0 0
4m read
Hacker News: Front Page • 2026-04-20 07:49

OpenClaw isn't fooling me. I remember MS-DOS

Article URL: https://www.flyingpenguin.com/build-an-openclaw-free-secure-always-on-local-ai-agent/ Comments URL: https://news.ycombinator.com/item?id=47831437 Points: 4 # Comments: 0

0 0
1m read
DEV Community • 2026-04-20 07:49

The Context Window Pricing Collapse

Claude's Opus 4.6 and Sonnet 4.6 now ship with 1M token context windows at standard pricing. No premium tier. No waitlist. Just 1M tokens, available to everyone. This single change killed the moat that every RAG startup built in 2023-24. The competitive advantage those companies sold was never retrieval quality. It was working around small context windows. That constraint just disappeared. ...

0 0
4m read
DEV Community • 2026-04-20 07:49

Capability-Priced Micro-Markets: The Missing Layer Between Agents and HTTP

At Ostronaut, we run a multi-agent pipeline where one agent structures content, another generates video assets, another validates quality. When we wanted to swap in a better external video provider, it took three days: read docs, negotiate pricing tier, configure auth, write retry logic, handle edge cases. Three days for one integration. We have twelve capability slots across the pipeline. HTTP ...

0 0
5m read
DEV Community • 2026-04-20 07:48

Designing with Open Data: What Developers Should Consider Before Building

Working with Open Data can feel deceptively simple at first. You find a dataset, explore a few endpoints, maybe even build a quick prototype. Everything seems straightforward until you try to turn that prototype into something more stable. At that point, a different set of challenges starts to appear. This article is not about how to use Open Data Hub step by step. Instead, it focuses on someth...

0 0
3m read
DEV Community • 2026-04-20 07:47

Sensitive Env Vars Should Be Default, Not Opt-In

I wrote a post earlier today about cleaning up after the Vercel breach. The cleanup itself is easy — ten minutes, a sequence of clicks, done. What's been bugging me all afternoon is a different question: Why is "sensitive" opt-in? The implicit default is wrong When you add an env var to Vercel, it's not marked sensitive by default. You have to remember to toggle it. This is the wron...

0 0
3m read
Setting Up a GCP Landing Zone for Organizations with Strict Regulatory Requirements
DEV Community • 2026-04-20 07:46

Setting Up a GCP Landing Zone for Organizations with Strict Regulatory Requirements

Setting up a GCP Landing Zone for organizations with strict compliance requirements is not a trivial task. Cloud Foundation Fabric with a suitable template can significantly simplify the work — but what if no appropriate template exists, or your specific requirements go beyond what the templates cover? In this article, we explain how a tool we built, Merlin Studio, can help set up a landing zone u...

0 0
5m read
DEV Community • 2026-04-20 07:43

How Synthetic Networks and Knowledge Graphs Surface Deep Intent for AI and Digital Transformation

The Problem: Surface-Level Signals Don’t Drive Enterprise Decisions Most organisations today rely on signals like: Search intent Website visits Content downloads Engagement metrics These signals are useful, but limited. They indicate what people are exploring, not what organisations are actually planning to implement. In AI and digital transformation, that distinction is critical. Enterprise d...

0 0
4m read
Researchers Detect ZionSiphon Malware Targeting Israeli Water, Desalination OT Systems
The Hacker News • 2026-04-20 07:34

Researchers Detect ZionSiphon Malware Targeting Israeli Water, Desalination OT Systems

Cybersecurity researchers have flagged a new malware called ZionSiphon that appears to be specifically designed to target Israeli water treatment and desalination systems. The malware has been codenamed ZionSiphon by Darktrace, highlighting its ability to set up persistence, tamper with local configuration files, and scan for operational technology (OT)-relevant services on the local subnet.

0 0
1m read
Next.js 16 Complete Beginner's Guide
DEV Community • 2026-04-20 07:32

Next.js 16 Complete Beginner's Guide

In this article, you will learn everything you need to know about Next.js 16. This is a completely beginner-friendly guide. So let's get started. Section 1: Next.js Fundamentals 1. What is Next.js & Why React Developers Should Care Next.js is a powerful React framework created by Vercel that enables developers to build full-stack web applications with ease. It...

0 0
28m read
DEV Community • 2026-04-20 07:30

The Future: Engineers as AI System Architects

AI is not replacing engineers. It’s redefining what it means to be one. 🚨 The Narrative is Wrong The common belief: “AI will replace programmers” But what’s actually happening is more subtle: AI is replacing parts of programming not the role of engineers 🧠 What’s Actually Changing Traditionally, engineers: Wrote code Debugged logic Built features Now, ...

0 0
2m read
DEV Community • 2026-04-20 07:30

Launch Day: 7 AI Agents Start Building Startups with $100 Each

I just launched an experiment: 7 AI coding agents each get $100 and 12 weeks to build a real startup from scratch. No human coding. The lineup Agent Tool Model Cost 🟣 Claude Claude Code Sonnet / Haiku $20/mo 🟢 GPT Codex CLI GPT-5.4 / Mini €23/mo 🔵 Gemini Gemini CLI 2.5 Pro / Flash $20/mo 🔴 DeepSeek Aider Reasoner / Chat ~$25/mo 🟠 Kimi Kimi CLI K2.5 ~$19/mo 🟡 Xiaomi Aid...

0 0
1m read
Product Hunt — The best new products, every day • 2026-04-20 07:25

KingCoding

Your Claude Code & Codex dev, now in your pocket Discussion | Link

0 0
1m read
DEV Community • 2026-04-20 07:20

What Is LangGraph? A Beginner-Friendly Introduction

What Is LangGraph? A Beginner-Friendly Introduction As LLM applications become more advanced, developers often need more than a simple prompt-response flow. Many modern AI apps must keep track of state, call tools, make decisions, and loop through multiple steps. That is where LangGraph becomes useful. I originally published the full Vietnamese guide here: LangGraph là gì? Hướng dẫn t...

0 0
2m read
Hacker News: Front Page • 2026-04-20 07:19

IEA: Solar overtakes all energy sources in a major global first

Article URL: https://electrek.co/2026/04/19/iea-solar-overtakes-all-energy-sources-in-a-major-global-first/ Comments URL: https://news.ycombinator.com/item?id=47831272 Points: 8 # Comments: 1

0 0
1m read
DEV Community • 2026-04-20 07:18

FinOps for AI vs Traditional FinOps: Key Differences Explained

Cloud cost management has always been a balancing act. But with the rise of AI—especially generative AI—that balance is shifting from predictable arithmetic to something far more dynamic. Welcome to the evolving world where traditional FinOps meets AI-driven uncertainty. The Foundation: What is FinOps? At its core, FinOps (Financial Operations) is a cultural and operational practice that brings to...

0 0
2m read
I Built and Shipped a $39 macOS App in One Day (Here's How)
DEV Community • 2026-04-20 07:16

I Built and Shipped a $39 macOS App in One Day (Here's How)

Yesterday I had an idea. Today it's on Gumroad making money. Here's exactly how I shipped HiyokoBar — a menu bar HUD for engineers — in a single day. The Idea I was constantly alt-tabbing to check Docker status, GitHub PRs, server health. I wanted something that pushes information to me, not something I have to pull from. Raycast is great but it's Pull-type. You invoke it when you need it. I ...

0 0
2m read
AI-Native Workflow: The Operating Manual for Your Agent
DEV Community • 2026-04-20 07:15

AI-Native Workflow: The Operating Manual for Your Agent

Imagine your first day on a new team. The codebase is well organized, the docs are written, the linter is configured. Nobody, however, tells you how this team actually works. Which channel for what, when to ask before pushing, when the senior dev expects to review. That's exactly what a new engineer faces when they first open the scaffold we've been building across this series. The folders are c...

0 0
7m read
Previous Next