title: Where to methods by used by all objects?
body: <p>I am developing a rails app and I want all my objects to have a certain method that process them. Now, while I realize that I could write that method in each object's model, I would rather stick with the DRY (don't repeat yourself) theory and place the method in one place.</p>
  
  <p>Is there a place I could place a method where all my objects have access to?</p>