freeCodeCamp

Beyond NVIDIA: Where the AI Infra Trade Actually Shows Up

Nikhil Adithyan |
The AI capex trade is usually discussed like one clean idea. Capex simply means capital expenditure, or the money companies spend on long-term assets like data centers, chips, servers, power systems,... read more

How to Build a PDF Page Numbering Tool in the Browser Using JavaScript

Bhavin Sheth |
When you're working with contracts, reports, invoices, manuals, or academic documents, page numbers make navigation much easier. Instead of manually editing every page, modern JavaScript libraries let... read more

How Step Counters Work in Wearables and Why Different Devices Give Different Results

Shradha Puri |
It’s been three years since I started using my wearables to count my steps. Three years of trying to hit the daily 10K target, closing rings, and going to sleep knowing that I accomplished something p... read more

How Declarative Partial Updates Work in HTML

Sumit Saha |
HTML has always supported streaming. The server doesn't need to build an entire page in memory before sending it to the browser. It can send the initial HTML first, then send more chunks as each chunk... read more

The Tradeoff That Slows Production Teams Down: Flexibility vs Actually Shipping

Manish Shivanandhan |
Every company says it wants speed. Roadmaps talk about velocity. Leadership meetings talk about reducing cycle time. Quarterly goals talk about faster execution and quicker releases. Every business wa... read more

How Contextual Embeddings and Hybrid Search Fix Retrieval Failures

Rishi Raj Jain |
If you’ve built a RAG (Retrieval-Augmented Generation) system in the past year, you’ve probably hit the wall where your LLM returns confidently wrong answers, cites information that doesn’t exist, or... read more

How Wearable IoT Enables Real-Time Fall Detection and Alerts

Shradha Puri |
Wearable IoT technology has become an important part of today’s elder care, as it can help detect falls and alert caregivers or family members immediately after an incident. This technology combines s... read more

Why Your Deep Learning Model Isn't Learning: Diagnosing Data Problems in Medical Imaging

Lakshmi Mahabaleshwara |
I built a clean, well-structured deep learning pipeline using MONAI (Medical Open Network for AI) on a public abdominal ultrasound dataset. The pipeline included: proper subject-grouped train/validat... read more

Build Professional Web Scrapers That Actually Work

Beau Carnes |
Web scraping has evolved. If you’ve ever tried to pull data from a site, only to be hit with a CAPTCHA, an IP ban, or a "403 Forbidden" error, you know that modern websites are built to block automate... read more

A Developer's Guide to WebMCP: Shipping a 0% Adoption Standard

Chudi Nnorukam |
I scanned 111,076 of the top 200,000 websites on the internet looking for a specific HTTP header. I found exactly zero. Not one domain has shipped WebMCP in production. Not a single Fortune 500 site.... read more