Bruce Tate continues his fine Crossing Borders series with a look at Ruby's support for closures. If code blocks and block techniques used by routines such as Rails' respond_to confuse you, it's a great primer.

Vsevolod Balashov has taken a PHP PageRank decoder and rewritten it in Ruby. It works and it's fast. Simply, it retrieves the PageRank value for a supplied URL from Google and decodes it back to the PageRank value between 0 and 10. Each page indexed by Google has one of these numbers, and have historically represented how well linked a Web site is and how well it will rank in Google. The usefulness of PageRank has dropped a lot in the past year or two, but it can still be a useful indicator of how significant a Web site is.

Russ Olsen has been putting together a small series of blog posts about building a DSL in Ruby. The first part dates from October 2006, but the second part has just been released, making it a good double length read. In the mini-series, Russ looks at the motivation for developing a DSL and develops a basic DSL called Potemkin.

Tattle is a project from Chad Fowler, Jim Weirich, and Bruce Williams that allows you to submit information that would be useful to the RubyGem developers and, ultimately, developers of other Ruby gems. You can see charts showing the data submitted so far here.

License: Creative Commons Attribution-ShareAlike 2.0. Copyright, Why The Lucky Stiff.

You're about to start a new Rails project. Do you type rails <project name>? No, "Stop using the rails command", says Josh Susser. If you create a dummy / default Rails project that's set up just the way you like it with plugins, your own extensions, and all those carefully defined svn:ignore flags, you can just create a new Rails project with a simple svn copy. So simple, but I've totally missed this idea, and it's a real timesaver.

Amy Hoy has written a great tutorial running through the Rails console that's suitable for both complete novices and experts (there are a couple of tricks she mentions that I didn't know at least!). Amy appears to have taken up Slash7 with a new zeal lately, so let's hope we'll see more great content like this on her blog through 2007!