Paul Simpson questions

Paul Simpson answers

• Do static images get cached by Heroku if they're loaded from Amazon's S3 cloud servers?
• Rails 3 and PDFKit. How to specify page size?
• Access stylesheet_link_tag from controller
• ActiveRecord query for a count of new users by day
• Ruby Count Array objects if object includes value
• Rails 3. before_destroy validation to prevent deleting parent records
• Odd behavior of backspace in Vim (SSH to Linux from Mac)
• Include module in all MiniTest tests like in RSpec
• Remove/Uninstall old version of ruby gem