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| # | Name | Comments | Duration | Released |
|---|---|---|---|---|
| 398 | Service Objects pro | 114 comments | 12 minutes | Dec 18, 2012 |
| 71 | Testing Controllers with RSpec | 59 comments | 11 minutes | Sep 17, 2007 |
| 123 | Subdomains | 82 comments | 18 minutes | Aug 18, 2008 |