I was looking over the code behind the New Relic RPM plugin for Rails, and noticed a small bit of code in the following style:

@obj = SomeClass.new
# Do stuff
def @obj.a_new_method
  # add functionality
  # to obj, specifically
end

Without entering into the mostly futile discussion regarding the numerous goods / evils of this sort of monkey patching, it was a cool piece of Ruby functionality I hadn’t yet seen.

This entry was posted on Saturday, January 24th, 2009 at 1:14 am and is filed under Ruby. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.