John Sonmez has just added a new pattern to the Design Patterns Library: Composite

The composite pattern is a partitioning design pattern that lets clients treat individual objects and compositions of objects uniformly. In this module, John will teach you how to use the composite pattern in your designs to organize your object hierarchies in a consistent and easy to consume way, with many practical examples to demonstrate the concepts along the way.

Be sure to check out the other 30+ patterns in the library, as well.  These patterns are time proven techniques for building long-lived, well factored software that are widely used in software development today.  We add new design patterns on a regular basis, so be sure to check back frequently!