Tutorials

• basic devise auth
  • http://andreapavoni.com/blog/2013/8/a-rails-4-tutorial-application-for-beginners/#.V1yeGPSKQ6g
• concerns
  • https://richonrails.com/articles/rails-4-code-concerns-in-active-record-models

https://www.railstutorial.org/book

http://railsforzombies.org

Up and Running

• http://stackoverflow.com/questions/2083112/difference-between-or-and-in-ruby
• http://stackoverflow.com/questions/5890118/what-does-variable-mean-in-ruby/5890199#5890199