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Design Patterns: Elements of Reusable Object-Oriented Software (1994) is a software engineering book describing software design patterns.The book was written by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, with a foreword by Grady Booch.
Erich Gamma is a Swiss computer scientist and one of the four co-authors (referred to as "Gang of Four") of the software engineering textbook, Design Patterns: Elements of Reusable Object-Oriented Software.
The group agreed to build on Erich Gamma's study of object-oriented patterns, but to use patterns in a generative way in the sense that Alexander uses patterns for urban planning and architecture. They used the word generative to mean creational, to distinguish them from Gamma's patterns' that captured observations. The group was meeting on the ...
Most of them are based on the work from Erich Gamma, Frank Buschmann and Christopher Alexander on patterns (in architecture or computer science). One of them, proposed by Hahsler, [4] has the following structure: Pattern name: a pattern name should really reflect the meaning of what it is abstracting. It should be simple so that one can refer ...
In object-oriented programming, the template method is one of the behavioral design patterns identified by Gamma et al. [1] in the book Design Patterns.The template method is a method in a superclass, usually an abstract superclass, and defines the skeleton of an operation in terms of a number of high-level steps.
David E. DeLano of C++ Report praised the first volume, writing, "Overall this text is good and I recommend it as an addition to any collection of books on patterns." He said "some of the language and grammar usage feels awkward to the reader" and some of the book has "stiffness and flow problems". [ 1 ]
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The flyweight pattern is one of twenty-three well-known GoF design patterns. [1] These patterns promote flexible object-oriented software design, which is easier to implement, change, test, and reuse. In other contexts, the idea of sharing data structures is called hash consing.