Ruby — resources
roadmap.sh: https://roadmap.sh/ruby
Books
- The Well-Grounded Rubyist (David A. Black) — the best deep, modern introduction to how Ruby actually works.
- Programming Ruby (The Pickaxe) (Dave Thomas et al.) — the classic comprehensive reference for the language and stdlib.
- Practical Object-Oriented Design in Ruby (POODR) (Sandi Metz) — essential OO design wisdom taught through Ruby.
- Eloquent Ruby (Russ Olsen) — teaches idiomatic, expressive Ruby style and conventions.
Courses / practice
- Official Ruby docs — canonical language site with guides and references.
- Ruby core/stdlib API docs — authoritative reference for every built-in class and method.
- The Odin Project — Ruby — free, project-based full curriculum.
- Exercism Ruby track — hands-on exercises with mentoring to build fluency.