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Learn about the visitor pattern, a software design pattern that separates the algorithm from the object structure. See how it can be used to add new operations to existing classes without modifying them, and how it relates to other patterns like iterator and double dispatch.
Design Patterns is a software engineering book describing 23 software design patterns. It was written by Erich Gamma, Richard Helm, Ralph Johnson, and John Vlissides, with a foreword by Grady Booch, and published in 1994.
Learn about exhibit design, the process of developing three-dimensional exhibitions that communicate information, involve and engage audiences. Explore different types of exhibits, such as museums, retail spaces, and themed attractions, and see how they are influenced by culture, technology, and visitor experience.
Applicability. The single-serving visitor pattern should be used when visitors do not need to remain in memory. This is often the case when visiting a hierarchy of objects (such as when the visitor pattern is used together with the composite pattern) to perform a single task on it, for example counting the number of cameras in a 3D scene.
Learn how the adapter pattern allows the interface of an existing class to be used as another interface, often to make classes work together without modifying their source code. See examples, diagrams, and code snippets of the adapter pattern in different programming languages.
Learn about design patterns in software engineering, a concept that describes a well-defined aspect of a program in terms of how to write the code. Find out the history, benefits, types and examples of design patterns, as well as related books and resources.
The Digital Visitor and Resident (V&R) model provides a framework to depict how user preference and habit motivates engagement with technology and the web. V&R is commonly described as a continuum , with two modes of online engagement at either end, making a separation between different approaches to engagement.
Learn about the history, design and usage of tourist signs, also known as brown signs, that direct visitors to tourist destinations. Find out how they are used in different countries and what critics say about them.
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