Screen scraping is not pretty, but sometimes it's your only option to extract content from an external site. In this episode I show you how to fetch product prices using ScrAPI. (15 minutes)

Rails 2.3.3 brings us a new feature called "touch". See how to use this to auto-expire associated caches in this episode. (6 minutes)

Is there a long running task which should be handled in the background? One of the best ways is using the delayed_job plugin like I show in this episode. (10 minutes)

Learn how to apply OpenID to an existing Authlogic setup as I show in this episode. This builds upon the app from episode 160. (11 minutes)

Use JavaScript to allow dynamic content in a page cache. In this episode I show you how to insert the user-specific content into a page through JavaScript. (11 minutes)

Learn two different techniques for parsing an RSS feed using Feedzirra in this episode! (10 minutes)

Use a virtual attribute to implement a simple tagging feature. In this episode I show you how to assign virtual attributes through a callback instead of a setter method. (7 minutes)

Metric Fu is a compilation of several tools to help find areas of code that could be improved. In this episode I show you how to setup this tool on the railscasts.com source code. (9 minutes)

Use checkboxes to select multiple records and edit them all in one form as shown in this episode. With virtual attributes you can even edit values relatively! (14 minutes)

Cron is great for handling recurring tasks, but it is an external dependency with a crazy syntax. In this episode I show you how to use Whenever to create cron jobs with Ruby. (8 minutes)