Mountable Engines are a great way to extract code into its own namespace and allow the code to be reused in other applications. Other popular gems that are mountable engines are Devise and Doorkeeper.
Chosen is a jQuery plugin that makes long, unwieldy select boxes much more user-friendly. Learn how to use Chosen in a few different ways in this episode; Rails form builder and Simple Form.
Using Interact.js to create draggable and droppable items in our view, we can use AJAX callbacks on events to interact with our Ruby on Rails application. Also, learn how to use Ruby Assets to manage our Javascript Libraries.
Sometimes you may find yourself with an application that has javascript that needs to execute only on a specific page. This episode lays the foundation to easily manage page specific javascript.
When displaying a significant number of records, it is often a basic functions in a web application is to paginate the records and load them as requested.