I’ve added a new category: “things I’ve learned more than once.”

To inaugurate this category, I give you rak, a nice little directory-level search tool.

Need to find all the times you used a method in a pile of code? Searching desperately for the error alert that says, “This stupid file has been changed?”

There are a fair number of tools for this — rak is based on ack, for instance, which is probably based on awk — but rak is nice because it’s pretty. And Ruby. Line numbers! Color! Automatically skips most version control files!

Dave says check it out.