This combines two techniques I shared before:
- http://ascendbruce.logdown.com/posts/205967-using-irbrc-to-serve-frequent-used-commands-in-rails-console
- http://ascendbruce.logdown.com/posts/208604-awesome-rails-console-customization-using-pry
This is helpful for people who want to customize rails console but not permitted to add those gems into Gemfile.