freeCodeCamp.org
70 articles in the Truth Foundry index. Each links out to the original.
- Practical Guide to Profiling Flutter Apps with DevTools to Fix Jank · Flutter DevTools help identify and fix UI thread and raster thread jank in apps.
- freeCodeCamp Releases Full-Length TypeScript and React Tutorial · Rachel Johnson teaches how to refactor React apps to be type-safe and maintainable using TypeScript.
- freeCodeCamp Video Essay Examines Recurring AWS US-East-1 Outages · freeCodeCamp explores how AWS US-East-1 failures reveal systemic fragility in the modern internet.
- Build Browser-Based PDF OCR to Text Converter Using JavaScript · Tutorial on creating a local PDF OCR tool using PDF.js and Tesseract.js in JavaScript.
- Tutorial: Build Four Production-Ready Card Components with shadcn/ui · Learn to create four production-ready card components using shadcn/ui and Base UI primitives.
- freeCodeCamp Releases Hands-On AI Agents Video Course Led by Mumshad Mannambeth · freeCodeCamp launches a comprehensive video course on building AI agents with Mumshad Mannambeth
- Why Modern Cloud Alternatives Fail to Recreate Heroku's Cognitive Ease · The author argues Render, Railway, and Fly.io fail to match Heroku's value of cognitive zero, not just easy deploys.
- Software Engineering Systems Behind Production AI Products · Building reliable AI products requires engineering systems beyond just the model API.
- Build a Private Local RAG Q&A AI Agent with LangChain v1 · Tutorial on creating a local RAG-powered Q&A agent using LangChain v1, Ollama, and Qwen for private document analysis.
- Comparing OpenAI Codex and Anthropic Claude Code for Developers · Analysis of OpenAI Codex and Anthropic Claude Code reveals distinct philosophies for software development.
- Stop Early on AI Product Experiments Without P-Hacking Using mSPRT · mSPRT enables early stopping in AI product experiments while maintaining valid statistical inference
- freeCodeCamp Releases Comprehensive JavaScript Date and Time Mastery Course · freeCodeCamp.org launches a 2-hour course by Tapas to master JavaScript date handling.
- Build Resilient JavaScript Apps with TypeScript Guard Utilities · Four TypeScript utility functions prevent runtime crashes from unsafe API data.
- Enterprise Team Cuts Infrastructure Time by 80% Migrating AWS to Sevalla PaaS · A 7-person team reduced infrastructure maintenance from 15 hours to 3 hours weekly by migrating from AWS to Sevalla.
- How to Enable iPhone VoiceOver and Test Website Accessibility · Learn to turn on VoiceOver, master gestures, and adjust settings to test website accessibility on iPhone.
- Why Different Wearables Report Different Heart Rates · Wearable heart rate discrepancies stem from sensor placement, sampling speeds, and proprietary algorithms.
- Build a Browser-Based PDF Resizer with JavaScript and pdf-lib · Create a client-side PDF resizing tool using JavaScript and the pdf-lib library
- Beginner's Guide to Writing Your First Quantum Circuit in Python with Qiskit · This tutorial teaches Python developers to build a Bell State circuit using Qiskit.
- Build a Bloom Filter From Scratch in Python: A Step-by-Step Tutorial · This tutorial explains how to build a Bloom filter from scratch in Python using bit arrays and hash functions.
- How to Use Claude Code to Build Flutter Apps Faster — Best Practices for 2026 · The article outlines best practices for using Claude Code to accelerate Flutter app development through structured architecture and agentic workflows.
- Build a Local AI Web Research Agent Using Ollama and Qwen · A Python-based agent uses Ollama's web search and local Qwen to summarize topics privately.
- Five Best Cloudflare Tunnel Alternatives for Developers · LocalXpose, Tailscale Funnel, Inlets, FRP, and Tunnelmole offer secure tunneling options with varying levels of control and ease of use.
- freeCodeCamp Course Teaches Distributed Data Parallelism for AI Scaling · A new freeCodeCamp course guides developers through mastering Distributed Data Parallelism to scale AI models across multiple GPUs.
- Computers Cannot Precisely Count Money Due to Binary Rounding Errors · Computers struggle with exact decimal math, forcing financial systems to use integers instead of floating-point numbers.
- Build Persistent AI Agents in Telegram with Vercel, Cursor, and Composio · A new freeCodeCamp course teaches building AI agents with Vercel, Cursor, and Telegram integration.
- Building Reliable SSE Clients in TypeScript with Ore Library · Learn to build robust Server-Sent Event clients in TypeScript using the Ore library for automatic retries and reconnection.
- Advanced Dart Concurrency: Mastering Streams, Isolates, and the Event Loop · Dart uses a single-threaded event loop with microtask and event queues to manage async operations without blocking the UI.
- Brazilian Visually Impaired Graduate Becomes First Blind Cybersecurity CVE Publisher · A Brazilian visually impaired researcher became the first blind person to publish a CVE in the U.S. National Vulnerability Database.
- Dart 3.10 Introduces Dot Shorthands to Reduce Boilerplate in Flutter Code · Dart 3.10 and Flutter 3.38 add dot shorthands to eliminate repetitive type names in widget code.
- How to Insert and Display Images in Google Sheets Using Menus and Functions · Learn to insert images inside or over cells using the Insert menu and IMAGE function in Google Sheets.