A functional pattern system for object-oriented design

These patterns can be used with any object-oriented language to advance software design. The patterns form a system, i.e., a collaborating set of patterns. In their "Related Patterns" sections the patterns refer to each other and to many other published design patterns. The book uses the Eiffel programming language to illustrate the patterns with running sample code. It includes a critical review of the Eiffel language in terms of its suitability as a functional pattern implementation language.