Frederick Cheung questions

Frederick Cheung answers

• Why does ActiveRecord's :include do two queries?
• Ruby: wait for any child process to finish
• have_selector is failing test
• Rails 2 Mailer View Prepending 3D to strings
• Calling private method outputs undefined method error
• how to set default value to column in rails while creating migration
• How to bind lambda to hash in Ruby?
• Thread running in Middleware is using old version of parent's instance variable
• Ad Hoc Distribution on XCode 4.2.1 - entitlements
• Ruby: Elegant way to substitute captured part of string