How a Bloom Filter Works: Build One From Scratch in Python
Prasanth Madhurapantula |
A Bloom filter gives you something that feels like magic: it can tell you whether an item is in a set of billions, using only a few kilobytes of memory. And it answers in the same tiny amount of time... read more
How to Use Claude Code to Build Flutter Apps Faster — Best Practices for 2026
Jesutoni Aderibigbe |
In early 2023, I was interning at a US-based company, long before agentic AI became part of everyday development. We had tools like ChatGPT, Gemini, and Copilot, but they were mostly chat interfaces:... read more
How to Build a Personal AI Web Research Agent with Ollama and Qwen
Darsh Shah |
In this tutorial, I’ll show you how to build an AI web research agent using Ollama, Qwen, and Python. The agent searches the web for a topic, fetches relevant pages, and uses a local LLM to generate a... read more
The Best Cloudflare Tunnel Alternatives – How to Choose the Right Tunneling Solution for Your Use Case
Abdul Talha |
Cloudflare Tunnel is a secure tunneling solution that allows developers to expose local applications and private services to the internet without opening inbound ports or changing firewall rules. Inst... read more
Scaling Your AI Models with Micro-DDP
Beau Carnes |
Scaling large AI models requires more than just raw computing power. It demands sophisticated techniques to distribute workloads efficiently across hardware. We just posted a new course on the freeCod... read more
Why Computers Can’t Count Money
Beau Carnes |
Computers are incredibly fast, but they have a surprising, fundamental flaw when it comes to counting money. In our latest freeCodeCamp.org video, "Why Computers Can’t Count Money," Ania Kubow dives i... read more
Build an AI Agent in Telegram with Vercel, Cursor, Composio
Beau Carnes |
Building your own AI agent has never been more accessible. We just released a comprehensive new course on the freeCodeCamp.org YouTube channel that guides you through building a powerful, persistent A... read more
How to Build a Reliable SSE Client in TypeScript
timothy ogbemudia |
When you build a feature that streams data, like an AI chat response or a live notification feed, the network is rarely as cooperative as fetch makes it look. Connections drop, proxies buffer response... read more
Advanced Dart: Learn Asynchronous Programming with Streams, Isolates, and the Event Loop
Gidudu Nicholas |
I had been writing Flutter apps for over a year before I actually understood how Dart handles concurrency. I knew how to use await. I knew FutureBuilder and StreamBuilder well enough to get things wor... read more
How I Became Brazil's First Visually Impaired Cybersecurity Graduate — and Changed Vulnerability Research
Juan Mathews Rebello Santos |
I was born prematurely at six months. My mother's placenta detached before delivery, and she essentially "gave birth" before I came out. Two days after my birth, doctors found a heart murmur that requ... read more