This book was created to give programmers who are learning the Ruby programming language as well as those delving into more complicated issues a clear and succinct explanation of the topics at hand.
The majority of examples provide links to online playgrounds where you can edit the code and rerun it.
Additionally, you can rapidly navigate to desired information by utilizing the table of contents on the left and the search bar at the top (pro tip: you may start a search with the shortcut '/' on your keyboard).