You can refactor with confidence in Ruby if you have a good test suite. Just do it incrementally and test it well along the way, and also (when using Rails) add

You can refactor with confidence in Ruby if you have a good test suite. Just do it incrementally and test it well along the way, and also (when using Rails) address any deprecation notices you find along the way and you'll be fine. I've been using Rails since late 2005, and in my last job upgrades a few Rails apps that haven't been touched since 2008 or so.