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Concurrency and parallelism are two software development concepts that are often confused. Both refer to a system's ability to handle multiple tasks - but they work quite differently. In this guide, Wisdom explains the differences between the two to help you build scalable,…
Configuration files give you a more structured way to manage your app's settings than environment variables alone. And in this guide, Bala teaches you how to read and parse INI config files in Python. You'll learn how to use the built-in configparser module and create a config…
For today's coding challenge, you'll figure out how to turn any sentence into Yoda-speak. Find it on the freeCodeCamp mobile app, you can.
Google has a new Generative AI Leader Certification you can get to show you know how to effectively and responsibly use GenAI in business settings. And in this course, @andrewbrown helps you study and prepare for the exam. He'll give you a business-level understanding of Google…
When you're working with and analyzing data, there are many small mistakes you can make that become big down the line. So in this guide, Oyedele walks you through some common pitfalls and how to avoid them. You'll learn about bias, unclear inputs, misinterpreting results,…
Model-Context-Protocol lets AI agents securely and intelligently interact with your databases, functions, and apps. And in this course, you'll learn how to create MCP servers using the open source FastMCP Python lib. You'll build a calculator app, integrate APIs, and test…
If you're building Java apps, you'll want to choose the right framework for what you're working on. And in this guide, Augustine compares Spring vs Spring Boot in detail. He explains their key features and differences, how they work, and walks you through building a demo app…
For today's (really, today's 😅) coding challenge, you'll create a thermostat adjuster. Check it out on freeCodeCamp's mobile app.
A sleek, modern sidebar can really improve the user experience when people are using your apps. And in this tutorial, Hitesh shows you how to use the react-mui-sidebar package in your projects. He explains how it works and helps you install and set it up in a React and Next.js…
On this week's freeCodeCamp podcast, Quincy interviews Kaleb Garner, a former baseball player-turned developer. After moving back in with his parents, he decided to teach himself programming. He shares tips for the job search, how to make your skillset and network…
Today's coding challenge is all about file storage. You'll need to figure out how many files a hard drive can store. Check it out on the freeCodeCamp mobile app.
Virtual canvases like Figma and Miro have become super useful for remote teams. In this tutorial, Cedd uses a simple React and TypeScript clone example, then shows how to optimize it. You’ll measure user-perceived performance, accelerate pan, zoom, and drag with D3 Zoom and…
Built-in functions in C++ are part of the standard libraries. They're designed to provide you with common and essential functionality you'll often need when programming. In this tutorial, Ayush teaches you some helpful built-in functions in C++ that you should know – with…
If you need to host an application you've built, you might be wondering which approach is right for you. Two common hosting options are using a Virtual Private Server (VPS) or a cloud-based Platform-as-a-Service. In this guide, Manish compares them and goes through their…
For many application developers, writing the networking layer of an app can be a tedious process. And if there's a minor change in a backend API - the whole thing can break. That's where the OpenAPI spec comes in. In this guide, Sravan teaches you how to build robust networking…
For today's coding challenge, you'll build a tip calculator! Might come in handy next time you go out to eat (if you live somewhere with a tipping culture!)...check it out on the freeCodeCamp mobile app.
Wishing a very Happy Diwali to all those around the world getting ready to celebrate! 🪔 ✨
If you really want to understand how LLMs work, try coding your own version of one from scratch. And that's exactly what you'll do in this course: build a Llama 4-like LLM from the bottom up. You'll build a tokenizer, learn about the attention mechanism, dive into Rotary…
If you're prepping for tech job interviews, you should know how to apply data structures & algorithms to coding challenges. And this course helps you learn the key DSA you'll need to know with plenty of examples. It covers arrays, sets, hashmaps, Big O notation, sliding window,…
Vim is a powerful, customizable text editor that many devs swear by. It has a steep learning curve for beginners, but this course helps smooth that out for you. @andrewbrown teaches you about Vim's history, customization & plugins, and core commands. freecodecamp.org/news/mastering…
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