OS X Lion comes with ruby 1.8.7-p249 installed, although it's compiled against libedit rather than libreadline. Whilst libedit is a mostly-compatible replacement for libreadline, I find there's a couple of settings I'm used to that don't work in libedit. (Like history-beginning-search-backward.)

Any rubyist that's defined a class should understand the following class definition:

I've had a dream for a while. A simple webapp that takes the last tweet in a conversation and outputs that conversation in chronological order on a page you can link to forevermore. Occasionally I'll google to see if anything new's turned up, but they all seem to do far more, require the start and end tweets or are covered ...

Imagine you've got a blogging app and it's currently generating URL paths like posts/10 for individual posts. You decide the path should contain the post title (in some form) to make your URLs friendlier when someone reads them. I know I certainly prefer to read http://caiustheory.com/abusing-ruby-19-and-json-for-fun vs http://caiustheory.com/?id=70. (That's a fun blog post if you're into (ab)using ruby occasionally!)

Ever since I found out about the new hash syntax you can use in ruby 1.9, and how similar that syntax is to JSON, I've been waiting for someone to realise you can just abuse eval() for parsing (some) JSON now.