freeCodeCamp.org

For today's coding challenge, you'll return the greatest common divisor of two positive integers. Think you can solve it? Go check it out on the freeCodeCamp mobile app.

JSON has been the standard data exchange format for a long time. But it's kind of verbose, especially for use with LLMs. So naturally, there's a new kid on the block called TOON - or Token-Oriented Object Notation. In this guide, @tapasadhikary explains how TOON works and why…

If you have a website, you'll likely want to check out some analytics to see how it's doing. But Google Analytics can be overly complex for small projects, and there are privacy concerns as well. In this guide, Manish walks you through setting up your own GA alternative using…

Trying to muddle your way through a poorly designed system architecture document is no fun at all. So in this guide, @E4ma_u_ teaches you how to create helpful system architecture documentation. She talks about diagrams, making tech language accessible, communicating clearly,…

Your phone’s Bluetooth stack does way more work than you think. Every sync, ping, or audio packet wakes up the main CPU, which burns battery life fast. In this article, Nikheel explains how Android’s Low Power Island and BluetoothSocketSettings offload that work to a smaller…

Retrieval Augmented Generation, or RAG, can help LLMs fetch up-to-date information. But it's not a fool-proof method of getting info, and sometimes it falls short. In this article, Kamal discusses five common things RAG struggles with and how you can use knowledge graphs…

If you're feeling ambitious this weekend, freeCodeCamp just published a FREE 9-hour Discrete Mathematics Python course. 🐍 Learn the math that undergirds many modern Machine Learning approaches. Here are this week's 5 free learning resources worth your time. 1. freeCodeCamp just…

For today's coding challenge, you'll calculate whether it's the weekend or not! Sounds kinda perfect for a Friday...check it out on the freeCodeCamp mobile app.

In Software Development, you'll often run into XML when working with config files, API responses, and so on. And if you're working in Python, you don't need an external library to parse XML - it's all built into the standard library. In this guide, Bala shows you how to parse…

Large Language Models, or LLMs, are powerful - but they can get expensive to run. This has given rise to a new breed of language model: the Small Language Model (we know, we know, inventive name!). In this guide, Manish explains how SLMs work, when and why they're useful, how…

Integrating vector search into data platforms has become pretty common these days. And Google's BigQuery has deeply built in vector search to its existing distributed, columnar architecture. In this tutorial, Chirag dives deep into the engineering behind it all & how BigQuery…

As a dev, you probably love automating things - and writing scripts is a great way to save yourself time. In this guide, Arunachalam explains how scripts work so you can create your own. He goes through some use cases + the pros and cons of using scripts, then shows a few…

As a software developer, you should know how to work with databases. And if you need to learn the basics or brush up on your skills, this course is for you. It covers client & network layers, execution management, storage engines, indexing, & lots more. freecodecamp.org/news/learn-dat…

For today's coding challenge, you'll get an array and an integer that represents how many positions to shift the array. Your mission, should you choose to accept it: return the shifted array. Try it out on freeCodeCamp's mobile app.

A web service is a standarized way for software apps to communicate with each other over a network. And in this tutorial, Kumar teaches you how they work and why they're important. You'll learn about two main types of web services - SOAP and REST - and when to use each one in…

Vite is a modern front-end build tool that that focuses on speed ("vite" means fast in French) and developer experience. And this course teaches you how to start using it in your projects. You'll learn how to integrate TypeScript, manage environment variables, customize Vite,…

As your apps get bigger and more complex, you'll have slower builds, more dependencies, & heavier Docker images. And if you haven't configured your setup properly, things could get painful. Here, @adeboyedn teaches you how to use multi-stage builds to get slim & fast Docker…

If you have a website, big or small, it might become a target for attackers. So you should be familiar with the top ways they might try to exploit vulnerabilities. In this article, Manish talks about SQL injection, cross-site scripting, weak authentication, and more - and how…

Vue.js is a flexible and fast JavaScript framework you can use to build user interfaces and single page apps. And in this course, Rachel teaches you how to use Vue by building real projects. You'll learn core concepts like components, reactivity, and template syntax, split your…

For today's coding challenge, you'll build an email signature generator. Find it on the freeCodeCamp mobile app.