Design Patterns: The mystic secret of great programmers

Design patterns hold the key to effective software development. We all know what a great UI looks like, but what does great software design look like? Get a brief introduction to design patterns and design principles, and then dive into the most impotant and commonly used patterns: Model-View-Controller, The Observer Pattern, Delegation, the Open/Closed principle, and a few others. Design patterns are applicable to almost any computer language, but are especially useful in object-oriented ones.