DEV Community • 2026-04-18 21:46

Day 2 at OHDSI Rotterdam: Everything You Learned Yesterday Isn't in Your Network Yet

You have been in Rotterdam for 36 hours now. You have heard talks on pharmacovigilance signal synthesis across EMA networks. You have seen poster results from three European cancer registries that share an identical challenge with outcomes they cannot route to each other. You had a hallway conversation with a researcher from a Scandinavian hospital that confirmed what your own institution found s...

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DEV Community • 2026-04-18 21:44

India's Homegrown AI Ecosystem: 110+ Apps Across 22 Languages and 28 Sectors

If you've been building AI tools and wondering where your next big market opportunity is — look east. Specifically, India. India is not just another emerging market for Western AI products. It is a civilization with 22 official languages, 1.4 billion people, and deeply specific needs across agriculture, healthcare, education, fintech, and governance. And right now, a wave of homegrown Indian AI st...

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DEV Community • 2026-04-18 21:41

Coding-Beginner-Quest

Hey, I'm currently learning to code. My question for you is how you code/learn new things, like new Rust crates or Python modules.

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I’m Learning Hash Tables (And Why You Should Care)
DEV Community • 2026-04-18 21:41

I’m Learning Hash Tables (And Why You Should Care)

I have a goal for my learning: to gain mastery so quickly and deeply that I can help my beloved ones master it too. Today, that topic is Hash Tables. If you’ve ever wondered how Google finds a search result in milliseconds or how a database finds your profile out of millions of users, the answer is usually a Hash Table. To understand how they work, let’s step away from the computer and walk into...

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Stuxnet: How a USB Drive Destroyed 1,000 Nuclear Centrifuges — A Technical Deep Dive
DEV Community • 2026-04-18 21:35

Stuxnet: How a USB Drive Destroyed 1,000 Nuclear Centrifuges — A Technical Deep Dive

In 2010, the world discovered that a piece of software had done something previously considered impossible: it caused real, physical destruction to industrial machinery — without anyone in the target facility knowing it was happening. This is the story of Stuxnet. Not the headlines version. The technical one. Background: The Target Iran's Natanz Fuel Enrichment Plant operated rou...

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DEV Community • 2026-04-18 21:23

Built a free browser-only dev tools site, no server side slowness, no signup

We all know that moment when you just want to format a JSON response from an API, and somehow you end up with 4 tabs open — one for JSON formatter, one for base64 decoder, one for regex tester, and one you don't even remember opening? Or when you paste your data into some "free online tool" and it spins for 3 seconds doing a SHA-256 hash... on a server... somewhere... for a string you typed. A st...

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Newest questions tagged css - Stack Overflow • 2026-04-18 21:21

Firefox Web Extensions: adding datepicker input to popup?

I am trying to add a builtin datepicker (i.e. <input type="date">) to a Mozilla web extension (which is based on html/css/js) but the calendar does not popup. The code below (stripped off extra css and js) does not popup the calendar if it is part of a web-extension (but it does popup the calendar if you just open it as html in a browser): <!DOCTYPE html> <html lang="...

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Stuxnet: How a USB Drive Destroyed 1,000 Nuclear Centrifuges — A Technical Deep Dive
DEV Community • 2026-04-18 21:18

Stuxnet: How a USB Drive Destroyed 1,000 Nuclear Centrifuges — A Technical Deep Dive

Stuxnet: How a USB Drive Destroyed 1,000 Nuclear Centrifuges — A Technical Deep Dive In 2010, the world discovered that a piece of software had done something previously considered impossible: it caused real, physical destruction to industrial machinery — without anyone in the target facility knowing it was happening. This is the story of Stuxnet. Not the headlines version. The technica...

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5m read
DEV Community • 2026-04-18 21:10

AI-Powered Crisis Management: How Independent Pharmacies Can Automate Shortage Response

The Manual Burden is Real Drug shortages are a constant, exhausting battle. You're manually calling patients, scrambling for alternatives, and watching adherence crumble—all while your workflow collapses. This reactive mode hurts patients and your business. But a new, proactive approach exists: AI automation. Core Principle: Intelligent Prioritization The key is moving from ...

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2m read
DEV Community • 2026-04-18 21:04

Korea's #1 Real Estate Platform Has No Official API — So I Built a Scraper. Then Got Blocked.

Korea has a real estate problem. Not in the market — in the data. Naver Real Estate (land.naver.com) is South Korea's dominant property platform. Millions of Koreans check it before every apartment decision: buying, renting, investing. It's where prices are listed, where transactions happen, where the market shows its face. But there's no official API. Not restricted. Not paid. Not deprecated. ...

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5m read
DEV Community • 2026-04-18 21:04

Flutter CI Broke With 2288 Errors — How dart fix --apply Saved Us

Flutter CI Broke With 2288 Errors — How dart fix --apply Saved Us What Happened One morning, deploy-prod.yml started failing: error • Use 'const' with the constructor to improve performance lib/pages/landing_page.dart:12:15 • prefer_const_constructors ... (2287 more errors) 2,288 errors. A 200-page Flutter Web app went from green to red overnight. The cause: one lin...

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DEV Community • 2026-04-18 21:01

Security+ started, 3 tools built, real attacks found on my own machine

Two weeks into a structured cybersecurity learning journey. This is the Week 2 review. Week 1 review and daily posts are on my profile. What changed between Week 1 and Week 2 Week 1 was about understanding how things work — networking protocols, Linux commands, basic Python. The goal was to build a mental model. Week 2 was about applying that understanding — studying for a real certification, b...

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DEV Community • 2026-04-18 20:59

10 CSS tricks that feel illegal to know in 2026 🤫

🧊 Hey, quick story Last week I watched a senior dev write 47 lines of JavaScript. To center a div. He wasn't joking. look, CSS has changed. A LOT. Most tutorials still teach you the 2019 way of doing things. The stuff I'm about to show you? It makes old approaches look like cave paintings. let's go. 🎯 1) :has() — The selector CSS never had (until now) This is the one ...

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9m read
DEV Community • 2026-04-18 20:57

I built a log analyzer, and it found real attacks on my own machine

I am documenting every day of my cybersecurity learning journey publicly. This post covers Days 8 through 12 — the first half of Week 2. The log analyzer and what it found The most significant thing I built this week is a Python log analyzer. It reads Linux auth.log files, finds every failed SSH login attempt, extracts the source IP from each one, and counts how many times each IP trie...

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EcoPulse: Real-time Air Quality + Gemini AI
DEV Community • 2026-04-18 20:55

EcoPulse: Real-time Air Quality + Gemini AI

🌍 EcoPulse: Real-time Air Quality + Gemini AI 🔗 Live Demo https://celebrated-dodol-6f257b.netlify.app 🎯 What I Built EcoPulse helps people understand local air quality and get AI-powered sustainability tips. Enter any city - get real-time AQI data and personalized Earth Day advice from Google Gemini. 🛠️ How It Works User enters a city name (try: New Y...

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Hacker News: Front Page • 2026-04-18 20:54

Any Color You Like: NIST Scientists Create 'Any Wavelength' Lasers

Article URL: https://www.nist.gov/news-events/news/2026/04/any-color-you-nist-scientists-create-any-wavelength-lasers-tiny-circuits Comments URL: https://news.ycombinator.com/item?id=47819453 Points: 7 # Comments: 0

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I replaced Auth0 with an open source library in 30 minutes. Here is what broke.
DEV Community • 2026-04-18 20:52

I replaced Auth0 with an open source library in 30 minutes. Here is what broke.

My Auth0 bill last month was $427. For 12,000 monthly active users on a side project that makes roughly $0 in revenue. I spent a Saturday moving off it. This is what happened. The bill Auth0's pricing jumps at the 1,000 MAU line. My project crossed it in March. The next tier is $240/month. Then I turned on MFA, which is extra. Then I wanted SAML for a B2B customer, which is extra. Then...

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DEV Community • 2026-04-18 20:52

Running 3 Parallel Claude Code Instances to Get $200 of Dev Work for $20/month

Running 3 Parallel Claude Code Instances to Get $200 of Dev Work for $20/month Overview I build Jibun Kabushiki Kaisha — a 200-page Flutter Web SaaS — using Claude Code. On a $20/month plan, I run 3 specialized Claude Code instances in parallel to achieve roughly 10x the development throughput. The Role Assignment System Each instance has a fixed responsibility: ...

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3m read
A Game for the Mind
DEV Community • 2026-04-18 20:50

A Game for the Mind

Spoiler! It is time to reveal my cards: mordorjs is a joke wrapped around a serious question for all of us. It is a game for the mind. A mental exercise meant to make us think a little harder. My goal with it is simple: we should not forget how to think. We should keep exercising our minds, because this may be the most important human ability we have left. And maybe it is also one of ...

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DEV Community • 2026-04-18 20:46

Why random.randint(300, 850) is a bad fake credit score

I searched GitHub for Python test files that reference credit_score. Across about 100 repos, every single one hardcodes an integer: user["credit_score"] = 720 Not one of them uses a generator, a factory, or even random.randint. They just pick a number and move on and random.randint isn't much better. 720 doesn't mean what you think it means A FICO 8 score of 720 falls in the ...

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