Include vs Extend in Ruby // RailsTips by John NunemakerRailsTips One man, lazily posting some of the things he learns. subscribe » Now that we know the difference between an instance method and a class method, let’s cover the difference between include and extend in regards to modules. Include is for adding methods to an instance of a class and extend is for adding class methods. Let’s take a look at a small example. module Foo def foo puts 'heyyyyooo
