Vadim Chumel questions

Vadim Chumel answers

• Error on installing ruby rvm
• Rails app won't delete user account using devise
• How to write a capybara matcher that checks that a div is empty?
• How to crop image on upload with Rails, Carrierwave and Minimagick?
• Rails, passing an object to mailer
• Unique usernames in Devise for Rails
• FactoryGirl screws up rake db:migrate process
• Rails 3: respond_with and Completed 406 Not Acceptable