Like in other theme-based systems, fragments of HTML code are stored in the .pstpl template files. For example, a vanilla scaffold will be accessible by ActiveResource. ActiveSupport There’s not all that much new in ActiveSupport. We’ve a host of new methods like Array#rand for getting a random element from an array, Hash#except to filter down a hash from undesired keys and lots of extensions for Date. We also made testing a little nicer with assert_difference.