Learn prompt engineering basics: system and user roles, clear instructions, XML tags, few-shot examples and prompt templates, with Python and Node.js code.
Continue reading...DuckDB 2.0 Tutorial: Fast SQL on CSV, Parquet and JSON in Python and Node.js
DuckDB tutorial for beginners: install DuckDB 2.0, query CSV, Parquet and JSON with SQL in Python and Node.js, and learn what changed in the 2.0 release.
Continue reading...Node.js Part 1: What Is Node.js and How to Build Your First Node.js App
What is Node.js? Learn how Node.js runs JavaScript on the server, how the event loop works, and build your first Node.js app and web server step by step.
Continue reading...React Part 1: What Is React and How to Build Your First React App
What is React? Learn React in simple words: components, JSX, state and the virtual DOM, then build your first React app with Vite, step by step.
Continue reading...DevOps CI/CD Part 1: What Is DevOps and How Does CI/CD Work?
What is DevOps? Learn DevOps and CI/CD in simple words: the DevOps lifecycle, CI vs CD, pipeline basics, and build your first GitHub Actions pipeline.
Continue reading...Agentic AI Part 1: What Is Agentic AI and How Do AI Agents Work?
Learn what agentic AI is, how AI agents work with the think-act-observe loop, and build your first tool-calling agent in Python and Node.js. Beginner friendly.
Continue reading...Generative AI Part 3: Your First LLM API Calls in Python and Node.js
Make your first LLM API calls in Python and Node.js with OpenAI, Claude and Gemini. Learn API keys, requests, token usage, errors and cost, step by step.
Continue reading...Generative AI Part 2: Tokens, Context Windows and Model Parameters
Learn what tokens, the LLM context window and model parameters mean, with Python and Node.js code to count tokens, trim chat history and estimate memory.
Continue reading...Generative AI Part 1: What Is Generative AI and How Do LLMs Work?
What is generative AI? Learn how LLMs work through next-token prediction, tokens and training, then run your first Python, Node.js and free local model code.
Continue reading...Tailwind CSS v4 Tutorial: Setup, @theme and Upgrading from v3
Learn Tailwind CSS v4 step by step: install with Vite or Next.js, customize with @theme, add dark mode, and upgrade from v3 without breaking your design.
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