Interviews

• Design Patterns 15 Years Later: An Interview with Erich Gamma, Richard Helm, and Ralph Johnson Erich Gamma, Richard Helm, and Ralph Johnson talk to Larry O'Brien about Design Patterns, 15 years later.

Articles

• A Look Back: Why We Wrote Design Patterns: Elements of Reusable Object-Oriented Software On the 15th anniversary of the publication of the Gang of Four's Design Patterns, we are republishing this article written in 1994 for Addison-Wesley's Innovations newsletter, in which Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides made the case for the book on the eve of its publication.

Sample Chapters

Design Patterns in Ruby: Reaching into a Collection with the Iterator; Design Patterns in Ruby: Picking the Right Class with a Factory from Design Patterns in Ruby by Russ Olsen

Framework Design Guidelines: Data Source Architectural Patterns; Framework Design Guidelines: Domain Logic Patterns from Patterns of Enterprise Application Architecture by Martin Fowler

Design Patterns: Chain of Responsibility; Design Patterns: Abstract Factory; and Design Patterns: Adapter from Design Patterns: Elements of Reusable Object-Oriented Software by Erich Gamma, Richard Helm, Ralph Johnson, John M. Vlissides

Refactoring to Patterns: Simplification and Refactoring to Patterns: Creation from Refactoring to Patterns by Joshua Kerievsky

Design Patterns in C#: Flyweight and Design Patterns in C#: Singleton from Design Patterns in C# by Steven John Metsker

Applying UML and Patterns: Mapping Designs to Code and Applying UML and Patterns: UML Class Diagrams from Applying UML and Patterns, Third Edition by Craig Larman