Our languages give us great tools in the form of primitives: things like integers, strings, and arrays. However, over-relying on these leads to problems. This practice even has it's own fancy code smell name: Primitive Obsession. In this video, Derek and Joël take a look at Primitive Obsession and the various abstraction tools languages provide to deal with it.
This is a companion discussion topic for the original entry at https://thoughtbot.com/upcase/videos/primitive-obsession