Resources

Learn. Practice. Reference.

Free reference guides designed to help you while you are learning and while you are building. Use them during a course, or on their own years afterward. Free, and free to print.

Foundations

HTML

A complete reference for the structure and meaning of a web page.

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CSS

A complete reference for the visual system of a web page.

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JavaScript

Variables through algorithms, with the Python equivalent noted beside each idea.

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Python

Variables through algorithms, with the JavaScript equivalent noted beside each idea.

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TypeScript

Inference, unions, narrowing, generics and typing untrusted data, with the compiler messages translated into what they actually mean.

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Command Line

A reference for navigating, searching and automating a Unix environment.

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SQL

Querying, joining, grouping and designing relational data, with the evaluation order that explains most of SQL's error messages.

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Development tools

Git & GitHub

A reference for tracking work, branching, and publishing a repository.

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Frameworks

React

Components, state, effects, hooks and routing, with the reasoning behind each rule rather than only the syntax.

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Django

Models, views, templates, the ORM, authentication and deployment, with the reasoning behind Django's conventions rather than only the syntax.

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APIs & Data

HTTP, JSON, authentication, pagination and rate limits, then finding, cleaning and joining real public data without misrepresenting it.

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Cheat sheets

Each reference above is the full cheat sheet for its subject, rebuilt as a web page you can search, link to and read on a phone. Downloadable versions are offered on each page where one exists.

See which course covers each one