Courses

Learn practical web development techniques that improve both user experience and search engine rankings.

Make the jump from Ruby to Clojure and functional programming, one idiom at a time. Quizzes after every chapter and a final exam earn a certificate.

Learn TypeScript by comparing it with the Ruby you already know. Chapter quizzes and a final exam lead to a certificate.

Learn Rust by mapping it to the Ruby you already write. Each chapter ends with a quiz, and a final exam earns you a certificate.

Learn Go through the lens of Ruby, comparing each idiom side by side. Quizzes after every chapter and a final exam earn you a certificate.

Skip the black-box frameworks. Build a working AI coding agent from scratch in pure Python. Add tools and memory, use cloud or local models, and test it with pytest. All in one file.

Learn Python asyncio from zero by building the event loop by hand. Six fetches go from 12 seconds to 3 on one thread, and you understand every line. Most asyncio tutorials throw async and await at you on page one. This course builds the event loop by hand first, in plain Python, so the keywords finally click. Six fetches drop from 12 seconds to 3, on one thread, and you understand every line. No magic. This interactive course has a companion book, Asyncio Without the Magic, on Leanpub at https://leanpub.com/asyncio . The book is the deep, cover-to-cover read; the course is where you make it stick with quizzes, build-it-yourself exercises, and runnable notebooks. They are built to be used together: read the idea in the book, then drill it in the course until it is yours. You get a lot from either one on its own, and the most by far from both together.

What was so unusual and special about Cray Research? We accomplished, repeatedly, what nobody else on the planet was able to match. High-Performance Computing is not merely parallelism and large-scale systems. That is the public-facing decoy version.

This course is designed for anyone curious about AI, whether you are a student, professional, entrepreneur, or enthusiast. Our goal is to tell the complete story of AI, from its beginnings to today, in a clear, engaging, and comprehensive manner.

Unlock the power of blockchain! Master the skills to build your own secure, scalable blockchain from scratch with our step-by-step, hands-on developer course. Start your journey today!

Learn the easiest way to get your first job in software development. It's possible even if you haven't done any formal computer science education or any professional programming experience. This course will show you how.