krn questions

• Shell: how check if no .txt files exist in the directory?
• Rspec: implicitly defined subject
• Ruby on Rails: CanCan and static pages
• Ruby on Rails: running Typhoeus on Windows 7 (64 bit)
• Ruby regex: ignore quotes if a colon stands before them
• Ruby flow control: throw an exception, return nil or let it fail?
• Ruby regex: replace double slashes in URL
• Ruby on Rails: should all my ActiveRecord callback methods be private?
• Ruby regex: "capture string unless it is followed by..."
• Ruby on Rails: prevent from selecting a column by default

krn answers