I read an interesting article by Dave Fayram (kirindave) contrasting monkeypatching in Ruby with protocol extension in Clojure. The article compares two of my favorite languages, but I think it was unfortunate to present monkeypatching as the main way to “associate behavior and data in a flexible way.” In fact, Ruby has a number of safer ways to extend types and single objects. (And in Ruby even monkeypatching doesn’t have to be dangerous.)