freeCodeCamp.org @freeCodeCamp
We're a community of millions of people who are building new skills and getting new jobs together. A 501(c)(3) public charity. Tweets by @abbeyrenn. freecodecamp.org Just here on Earth... for now Joined August 2013-
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Not every big stock move is really about the market. In this guide, Nikhil shows how to find stock-specific moves in the S&P 500 with Python. You'll estimate rolling beta, calculate residual returns, score abnormal moves, confirm with volume, and check the story against the news. freecodecamp.org/news/how-to-fi…
freeCodeCamp is going HARD with the Python Machine Learning courses this summer. Level up your conceptual knowledge this weekend.
Badges are popular, but they're often quite simple and, frankly, boring. Luckily, some tasteful animation can help. In this tutorial, @gupta05_vaibhav shows you how to build an animated badge with shadcn/ui, Tailwind CSS, and Motion. You'll add glow layers, animate a check icon, stagger each letter, and customize the component for other badge styles. freecodecamp.org/news/how-to-bu…
For today's coding challenge, you'll get an array of the inventory of a blood bank and an array of patient blood type requests. You'll need to return a string in the format "X of Y patients served." See if you can solve it on the freeCodeCamp mobile app.
Enterprise AI apps need more than clever system prompts. They need solid engineering, too. In this guide, Chidiebere explains how to build production-grade guardrails around LLM workflows. You'll add input checks, role-based retrieval filters, hallucination checks, a layered Python architecture, and more for safer internal apps. freecodecamp.org/news/how-to-bu…
Sleep trackers collect a lot of data while you rest, but they don't directly measure sleep. In this article, Shradha explains how wearables estimate sleep and what Bluetooth signals actually emit. You'll learn about BLE, SAR limits, melatonin research, RF-EMF evidence, and why sleep-score anxiety may be the bigger issue. freecodecamp.org/news/sleep-tra…
Flutter rebuilds widgets all the time, but that doesn't mean it throws everything away. In this guide, @GiduduNicowalte explains how Flutter renders under the hood. You'll learn how Widget, Element, and RenderObject trees work, what BuildContext really is, and why setState, keys, and ancestor lookups behave like they do. freecodecamp.org/news/how-flutt…
Fun fact: a LOT of the machine learning videos we publish on freeCodeCamp YouTube actual DESTROY our subscriber base. YouTube: "Keep in mind that some topics may just naturally attract a smaller audience." But we do it anyway. Because devs should learn these advanced concepts.
Modern AI apps typically involve more than one prompt sent to one model. In this guide, @sudheeshshetty explains how LLMs connect to tools, MCP servers, and LangChain workflows. You'll build Node.js examples for model calls, tool use, MCP integration, and orchestration to help demystify it all. freecodecamp.org/news/from-llms…
Terraform gets harder to manage when a ton of engineers start changing infrastructure together. In this guide, @irvingpictures shows you how enterprise teams manage Terraform at scale. You'll learn about state locking, module versioning, CODEOWNERS, CI/CD applies, drift detection, and recovery when state goes wrong. freecodecamp.org/news/how-enter…
Long-running AI agents need to be able to handle crashes and scale to fit workflows. In this guide, @shricodev shows you how to build a durable, autoscaling agent runtime. You'll use Temporal for retries and recovery, Composio for tool use, Docker and Kubernetes for deployment, and KEDA to scale workers based on workload. freecodecamp.org/news/how-to-bu…
For today's coding challenge, you'll get a string representing a frontmatter block. Your task is to parse it and return an object (JS) or a dictionary (Python) with the keys and values. See if you can solve it on the freeCodeCamp mobile app.
Small LLMs can be super useful when they're trained for a specific classroom task. In this guide, Srishti shows you how to teach one to suggest creative K12 project ideas. You'll build a Wikipedia-based dataset, filter unsafe content, fine-tune with LoRA, add RAG, and integrate the model into an educational app. freecodecamp.org/news/how-to-te…
Flutter apps don't usually become hard to scale because of UI complexity alone. They become hard to scale when features, state, navigation, and infra concerns start blending together. In this guide, @enthusiastDev teaches you how to structure large Flutter apps with feature folders, presentation/domain/data layers, scoped state, and other helpful features. freecodecamp.org/news/how-to-st…
Notion Workers let you build native automations without relying on third-party no-code connectors. In this course, Matthias teaches you how to get started using them. You'll learn how to pull external data into Notion, push updates to other apps, and automate business logic inside your workspace. freecodecamp.org/news/learn-not…
Reflection can make AI agent output sound better, but it doesn't reliably make structured output correct. In this guide, Manish shows why validators beat self-review for JSON, configs, SQL, and so on. You'll build a LangGraph loop that generates output, checks it with deterministic validation, feeds back exact errors, and retries safely. freecodecamp.org/news/what-to-d…
Automation helps you and your team eliminate repetitive work and focus on creative or strategic tasks. And there are various tools that help you automate things more effectively. In this beginner-friendly guide, @manishmshiva teaches you how build and use your own automation workflows using open source n8n. freecodecamp.org/news/a-beginne…
Azure Repos can get messy fast as teams, services, and pipelines multiply. In this guide, @casweb_dev shows how to organize repositories around ownership and business boundaries. You'll learn about naming standards, branch policies, RBAC, Terraform provisioning, Git LFS, shallow cloning, and more. freecodecamp.org/news/how-to-or…
For today's coding challenge, you'll get two DNA strands of equal length. You'll need to return an array of indexes where the strands differ. These represent mutations! Check it out on the freeCodeCamp mobile app.
EKS bills often grow because clusters are over-requested, over-provisioned, and optimized in the wrong order. In this handbook, Ayobami shows you a playbook for cutting Kubernetes costs before buying commitments. You'll right-size pods, set up Karpenter, use Spot and Graviton, add VPC endpoints, optimize EBS, and more. freecodecamp.org/news/eks-cost-…
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