Java Design Patterns is a site showcasing Java-based design patterns, principles and code snippets. It presents a collection of software design patterns implemented in Java, software design principles, and the 30 Seconds of Java collection of reusable, tested, copy-pasteable Java 17 compatible code snippets. It also offers an open source Java Design Patterns book.
The Cryptopals Crypto Challenges are a collection of exercises demonstrating attacks on real-world cryptography, derived from weaknesses in real-world systems and modern cryptographic constructions. The eight sets become progressively harder, and proficiency in any programming language is required.
Try Ruby provides educational videos, lessons, tutorials, or self-learning resources.
A GNOME application for learning and prototyping with GNOME technologies, from first tinkering to building and testing a GTK user interface. It includes live GTK/CSS preview, a library of over 100 examples, support for JavaScript, Rust, Python and Vala, declarative UI syntax, autosave, sessions and projects, code diagnostics and terminal output.
The USACO Guide is a free collection of curated competitive programming resources intended to take contestants from USACO Bronze to USACO Platinum and beyond. It includes modules, extensive problemsets, progress tracking and a forum, and the guide states it is not an official syllabus.
The Hitchhiker's Guide to Python is an opinionated guide to the Python programming language and a best practice handbook for installing, configuring and using Python daily. It covers topics such as getting started, development environments, writing and shipping code, and project documentation.
CSS Speedrun is a small web app for testing CSS knowledge. Users enter the CSS selector that applies to all elements marked with an arrow, and a timer starts after the first puzzle is solved correctly. It presents 10 puzzles, and users can view their results or check the GitHub repository to create their own puzzles.
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The Cryptopals Crypto Challenges are a collection of exercises demonstrating attacks on real-world cryptography, derived from weaknesses in real-world systems and modern cryptographic constructions. The eight sets become progressively harder, and proficiency in any programming language is required.
Try Ruby provides educational videos, lessons, tutorials, or self-learning resources.
A GNOME application for learning and prototyping with GNOME technologies, from first tinkering to building and testing a GTK user interface. It includes live GTK/CSS preview, a library of over 100 examples, support for JavaScript, Rust, Python and Vala, declarative UI syntax, autosave, sessions and projects, code diagnostics and terminal output.
The USACO Guide is a free collection of curated competitive programming resources intended to take contestants from USACO Bronze to USACO Platinum and beyond. It includes modules, extensive problemsets, progress tracking and a forum, and the guide states it is not an official syllabus.
The Hitchhiker's Guide to Python is an opinionated guide to the Python programming language and a best practice handbook for installing, configuring and using Python daily. It covers topics such as getting started, development environments, writing and shipping code, and project documentation.
CSS Speedrun is a small web app for testing CSS knowledge. Users enter the CSS selector that applies to all elements marked with an arrow, and a timer starts after the first puzzle is solved correctly. It presents 10 puzzles, and users can view their results or check the GitHub repository to create their own puzzles.
