If you’re a developer looking for a simple, fast, and self-hosted backend, PocketBase might be exactly what you need. It’s an open-source backend written in Go that lets you set up a complete backend with database, authentication, file storage, and ...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
Dr. David J. Malan teaches computer science at Harvard. Over the past decade, millions of people have taken his CS50 course both in person and online. He joins us to talk about: Why he still recommends learning the C programming language in 2026 Ho...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
Several languages and frameworks depend on dependency injection—no pun intended. Go, Angular, NestJS, and Python's FastAPI all use it as a core pattern. If you've been working with FastAPI, you've likely encountered dependencies in action. Perhaps yo...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
When people think of artificial intelligence, they imagine complex models, data centers, and cloud servers. What most don’t realize is that the real engine behind this AI revolution started in a place few expected: inside the humble gaming PC. The sa...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
Picture this: you’re sitting in a café with your laptop open, phone on the table, smartwatch buzzing every few minutes, and Bluetooth earbuds playing music. From your perspective, life is peaceful. From your phone’s perspective, it’s juggling a ridic...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
If your phone were a person, it would probably be that overachieving friend who cannot sit still. The kind who insists they are relaxing while secretly running errands, replying to messages, and checking the weather at the same time. Inside your Andr...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
Large language models are powerful, but they can also be unpredictable. They might generate long explanations when you expect a short summary, skip fields in a JSON output, or change the format completely from one request to another. When you’re buil...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
JSON, or JavaScript Object Notation, was popularized by Douglas Crockford in early 2000. Since then, there’s been no looking back. JSON has become the standardized data exchange format between client and server technologies. JSON was built for humans...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
If you’ve ever opened the Android Bluetooth source code, you might know this feeling. You go in with the calm confidence of a developer who just wants to understand how things work. You open BluetoothAdapter.java and think, “Ah, this looks clean.” Th...| freeCodeCamp Programming Tutorials: Python, JavaScript, Git & More
You may have built a Retrieval-Augmented Generation (RAG) pipeline to connect a vector store to a powerful LLM. And RAG pipelines are incredibly effective at grounding models in factual, up-to-date knowledge. But if you've worked with them long enoug...| freeCodeCamp.org
You can learn modern application architecture by building real-world serverless and microservices solutions using C# and Azure. We just posted a full course on the freeCodeCamp that will teach you to build scaleable cloud applications. Muhammad Abdul...| freeCodeCamp.org
You might be wondering what pseudocode is and why it's so useful for writing computer programs. But before we jump into pseudocode, let's refresh our memories about what programming and coding are, in the simplest sense. Programming is the manifestat...| freeCodeCamp.org
By Alexander Arobelidze People have been using random numbers for millennia, so the concept isn't new. From the lottery in ancient Babylon, to roulette tables in Monte Carlo, to dice games in Vegas, the goal is to leave the end result up to random ch...| freeCodeCamp.org
By Vijit Ail Often while developing projects, you will find yourself looking for ways to generate random numbers. The most common use cases for generating random numbers are games of chance like rolling dice, shuffling playing cards, and spinning ro...| freeCodeCamp.org
As technology evolves and game contents become more algorithmically generated, it’s not difficult to imagine the creation of a life-like simulation with unique experiences for each player. Technological breakthroughs, patience, and refined skills wil...| freeCodeCamp.org
Have you ever wondered how you can sign in to a website once and remain signed in, even if you close your browser? Or added an item to your shopping cart without signing in at all? Whether you know it or not, cookies are everywhere, and for better or...| freeCodeCamp.org
Large Language Models (LLMs) like LLaMA 2 and Mistral are often described as “black boxes”. This means that you can see the text you give them and the responses they produce, but their inner workings remain hidden. Inside the model, billions of weigh...| freeCodeCamp.org
When most people think of image hosting, they imagine uploading photos to a cloud service and getting back a simple link. It feels seamless, but behind that experience sits a powerful set of technologies. At the core is something called object storag...| freeCodeCamp.org
By Sampurna Chapagain Polymorphic association in Ruby on Rails refers to the type of active record association. From the Rails Guide, it allows a single model to belong to more than one other model on a single association. This tutorial assumes that ...| freeCodeCamp.org
Looking to get hands-on with AI? We just posted a comprehensive course on the freeCodeCamp.org YouTube channel designed to help you build powerful AI agent applications. Led by Cerebras growth engineer Sarah Chieng alongside industry experts from Exa...| freeCodeCamp.org
By Wassim Chegham TL;DR: A developer advocate is a developer’s best friend! For the past three years or so, I have been dedicating my professional time and a huge amount of my personal time to help fellow developers be successful and productive with...| freeCodeCamp.org
Good documentation is the backbone of a supported and empowered community. From the moment someone new joins and finds a clear guide to get started, to the experienced member who can quickly find a process, well-organized information saves everyone t...| freeCodeCamp.org
When building Flutter applications, managing local data efficiently is critical. You want a database that is lightweight, fast, and easy to integrate, especially if your app will work offline. Isar is one such database. It is a high-performance, easy...| freeCodeCamp.org
When you talk to an AI assistant, it can feel like it remembers what you said before. But large language models (LLMs) don’t actually have memory on their own. They don’t remember conversations unless that information is given to them again. So, how ...| freeCodeCamp.org
When you talk to a large language model (LLM), it feels like the model understands meaning. But under the hood, the system relies on numbers, vectors, and math to find the relationships between words and sentences. One of the most important tools tha...| freeCodeCamp.org
Map, reduce, and filter are all array methods in JavaScript. Each one will iterate over an array and perform a transformation or computation. Each will return a new array based on the result of the function. In this article, you will learn why and ho...| freeCodeCamp.org
If you're working in IT, you might need to schedule various repetitive tasks as part of your automation processes. For example, you could schedule a particular job to periodically execute at specific times of the day. This is helpful for performing ...| freeCodeCamp.org
Object Relational Mapping (ORM) is a technique used in creating a "bridge" between object-oriented programs and, in most cases, relational databases. Put another way, you can see the ORM as the layer that connects object oriented programming (OOP) to...| freeCodeCamp.org
If everything is predictable in a game, that isn't much fun. RNGs, or Random Number Generators, are a way to introduce a touch of randomness and causality you need to spice it up. In this article, we'll learn how random number generators work. How an...| freeCodeCamp.org
Random Method The JavaScript Math.random() method is an excellent built-in method for producing random numbers. When Math.random() is executed, it returns a random number that can be anywhere between 0 and 1. The 0 is included and 1 is excluded. Gene...| freeCodeCamp.org
By Nader Dabit If you’re reading this then you are a participant in the modern web. The web we are experiencing today is much different than what it was just 10 years ago. How has the web evolved, and more importantly – where is it going next? Also, ...| freeCodeCamp.org
By Shen Huang Do you really understand Big O? If so, then this will refresh your understanding before an interview. If not, don’t worry — come and join us for some endeavors in computer science. If you have taken some algorithm related courses, you’v...| freeCodeCamp.org
