Frederick Cheung questions

Frederick Cheung answers

• undefined method `sass' for #<Rails::Application::Configuration:0x1cf3338> on Staging
• Memory issue with huge CSV Export in Rails
• Rails 4.1 environment variables not reloading
• Modify Ruby array in C with RubyInline
• after_commit callback is being called several times
• Replacing the to_s method in Ruby. Not printing out desired string
• How to mock/stub the config initializer hash in rails 3
• Why does ActiveRecord's :include do two queries?
• Ruby: wait for any child process to finish
• have_selector is failing test