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Cropping Images (revised)
Allow users to interactively crop uploaded images using Jcrop and Carrierwave. Includes a live preview that shows the resulting image.
(11 minutes)
Generating RSS Feeds (revised)
If you have a page containing a dynamic list of records, consider providing an RSS or Atom feed for it. It is quite easy to do with XML Builder and the atom_feed helper method as shown in this episode.
(8 minutes)