Great universal backend object programming language for smart humans with features as mixins, meta programming, duck typing, threading, gem libraries management and a lot more.
Domain data modelling for relational database engines such as mysql, postgres or sqlite.
For ruby I strongly recommend http://rubykoans.com/ . Execellent source of ruby basics. Regarding JS, it's always better to understand the basics (DOM, events) instead of just copy&paste of jquery snippets.