Frederick Cheung questions

Frederick Cheung answers

• 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
• Add a C native method to a pre-existing Ruby class
• Rails: Find what is the Oldest Item in a Table
• Rails: Using .references on joins even though it is not required
• Rails 3.1 named_scope
• after_commit not getting called after update_all
• How to return 2 json objects at once?