Scraping E-commerce Product Data: Variants, Prices and Stock Without Losing Accuracy
E-commerce data scraping is the collection of public product information from online stores (titles, identifiers, variants, prices, availability and…
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How to Know When Your Vibe-Coded App Breaks Before Your Users Do: A 7-Step Beginner Guide to Error Alerts
Your app is live. You tested signup, you tested the main feature, everything worked. Then a week later someone replies to your launch post: "Is your…
System design fundamentals: estimate, scale and trade off
Part 1 of 8 · week 1 of the learning path Every large design is the same few building blocks combined to meet numbers, so learn the blocks and learn…
Why I Practice Coding Interviews Out Loud
For a long time I prepared for coding interviews by solving problems silently. I could solve medium problems on my own, then froze in real interview…
Getting Started with Voice AI Development in 2026
Why Voice AI Is Still a Hot Topic in 2026 If you’ve been following the AI landscape for a few years, you’ve seen text‑based models dominate the head…
Automating Repetitive Clicks for Everyday Testing
You do not need to be a programmer to automate a bit of testing. If you check a website or an app by clicking through the same steps after every cha…
Hey DEV Community! 👋
I'm Lakshya, a self-taught developer from India who loves building things, exploring new technologies, and learning by doing. I'm interested in soft…
A Developer's System for Finishing Online Courses While Working Full-Time
Most people don't fail online courses because the material is too hard. They fail because the course is competing with a full-time job, and the cour…
How the Internet Works for Kids: What Really Happens When You Open a Website?
A child types a website address, presses Enter, and a colourful webpage appears almost instantly. To them, the process seems straightforward. Type a…
A 5-step checklist I use before accepting AI-written code
AI assistants can write code in seconds, but speed only helps if you can trust what lands in your project. Here is the short checklist I run through…
Excel SUM wrong? Fix numbers stored as text with Text to Columns
You add up a column, the total looks too small, and you start re-adding the figures one by one to find the mistake. Often there is no arithmetic mis…
Windows Robocopy Command: Mirror a Folder Without Deleting the Wrong Files
robocopy /MIR is the fastest way to keep two folders identical on Windows. It is also the fastest way to wipe a backup drive, because a mirror does…
How to Stop Your AI App From Leaking API Keys and Running Up Your Bill: A 7-Step Beginner Guide
Your AI feature works and the demo looks great. One question before you share the link: where does your AI API key live? If you built your app with…
21/10
21/10 TOP - Foundation: 91% Project: Etch-a-Sketch Completed the sketch effect for Etch-a-Sketch. I add random RGB color for the sketch too. Shorter…
Should a Resume Be One Page or Two? A Clear Rule
The one-page rule is right more often than it's wrong, and it's applied to a lot of people it was never meant for. Here's where the line actually fa…
Bagaimana Teknologi Digital Mengubah Cara Kita Beraktivitas di Internet?
Bagaimana internet, perangkat pintar, dan layanan digital mengubah kebiasaan kita—serta apa yang perlu dipahami agar tetap aman dan kritis. Ketika m…
How to Test and QA AI-Generated Voice Content
Why Testing AI‑Generated Voice Content Matters Text‑to‑speech (TTS) and voice‑cloning have moved from novelty to production‑grade components in ever…
How to Get Free JetBrains IDEs as a Student and Run Claude Code with Ollama Locally
As a student, you need good tools without paying for subscriptions. In this tutorial, I'll show step by step how to: get JetBrains IDEs for free (In…
REA GitHub Tutorial: Reverse Engineer Anything with Claude Code (Full Setup + Fixes)
REA (Reverse Engineer Anything) is the viral GitHub repo that gives AI coding agents like Claude Code the tools to look inside an installed app — wi…
What Is Tableau? A Beginner's Guide to Data Visualization, Installation, and Benefits
Imagine you open a spreadsheet with 20,000 rows of sales records, customer transactions, or crop prices from different markets. You can scroll for a…
How to make a 30-day social media content calendar in Excel
Most small shops don't stop posting because they lack ideas. They stop because each day starts from a blank page. A 30-day calendar in Excel fixes t…
How Much Should a US Freelancer Set Aside for Taxes? (Self-Employment Tax + Quarterly Payments Explained)
If you just went from a W-2 job to freelancing (or picked up 1099 side gigs), the first client payment feels great. Then you realize nobody withheld…
Which Letter Case Goes Where? A Practical Cheat Sheet
Capitalization looks like a detail until it's inconsistent. One heading in Title Case, the next in sentence case, a button in ALL CAPS, and a page s…
How to Get Your First Real Testimonials for Your SaaS (Without Faking Them): A 7-Step Beginner Guide
Your landing page probably has a testimonials section. The question is whether any of it is real. If you built your first SaaS with Lovable, Bolt, v…
Free and Under-USD-100 AI Certificates: What the Price Actually Buys
As shown in our registry on 20 October 2026, 35 AI programs are free to take and 46 carry an accepted price under USD 100. Only 5 of those 46 are ce…
C++ Static Data Members: One Class, One Shared Variable, Many Objects
OOP Made Simple | CodeWithObaid — Day 2 Imagine you're building a library management system. Your application creates hundreds of Book objects. Each…
How to Get Your App's Signup and Password Reset Emails Out of Spam: A 7-Step Fix for Beginners
You built the app with Cursor, Lovable, Bolt or Claude Code. Signup works. You tested it five times. Then a real person signs up, never gets the con…
What If a Small AI Model Could Speed Up a Big One Without Changing Its Answers?
Hello, I'm Rijul, and I'm building LiveReview — a blast-radius aware AI code review built for your business-critical systems. Star us to help devs d…
I scanned 62 live AI-built apps from Show HN. Here's what they miss before launch
I build ShipSafe , a launch-readiness scanner for apps made with Lovable, Bolt, v0, Replit and friends. Before I told anyone it was useful, I wanted…
How to Stand Out as a Self-Taught Full Stack Developer in 2026: A Practical Guide
Quick Answer: To stand out as a self-taught full stack developer in 2026, focus on building real-world projects, mastering frontend and backend tech…