Generate a list of Rails controllers and methods

列出项目中的controler和他对应的actions：
@controller_actions = ActionController::Routing::Routes.routes.inject({}) do |controller_actions, route|
      (controller_actions[route.requirements[:controller]] ||= []) << route.requirements[:action]
      controller_actions
end

来源：http://snippets.dzone.com/posts/show/4792