The Best of OO: Clojure Types and Protocols

About this Presentation

The best abstraction in OO is the interface: a pure specification that can the be implemented polymorphically by many different callees. Clojure's types and protocols generalize this idea to solve
the expression problem. In this session you will learn:

• What the expression problem is.
• How the expression problem hurts your code every day, through wrappers, mixins, adapters, facades, open classes, and monkey patches.
• How protocols solve the expression problem.
• Ease of use matters: using protocols and types are as simple as classes and interfaces.
• Performance matters too: protocols take advantage of the host environment's support for fast polymorphic dispatch.

Examples will include hands-on exercises for you to take home.