https://udemy-rails-message-me.herokuapp.com/

Things I learned during this section

• Terminology
  • Double-bang operator !!
  • unless conditional statement
• Semantic UI
• Testing terminology
  • refute
  • assert_not_nil
• Test-Driven Development (TDD)
• Fixtures
• Helper methods
• byebug
• ActionCable
• Coffeescript
• Render partial from controller
• Scope