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Overview. The Visitor [1] design pattern is one of the twenty-three well-known Gang of Four design patterns that describe how to solve recurring design problems to design flexible and reusable object-oriented software, that is, objects that are easier to implement, change, test, and reuse.
Exhibit design (or exhibition design [1]) is the process of developing an exhibit—from a concept through to a physical, three-dimensional exhibition. It is a continually evolving field, drawing on innovative, creative, and practical solutions to the challenge of developing communicative environments that 'tell a story' in a three-dimensional ...
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. The book is divided into two parts, with the first two chapters exploring the capabilities ...
Visitor management. Visitor management refers to a set of practices or hardware additions that administrators can use to monitor the usage of a building or site. By gathering this information, a visitor management system can record the usage of facilities by specific visitors and provide documentation of visitor's whereabouts. [1]
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.
Software design pattern. In software engineering, a design pattern describes a relatively small, well-defined aspect (i.e. functionality) of a computer program in terms of how to write the code . Using a pattern is intended to leverage an existing concept rather than re-inventing it.
David M. Cote (Chairman and CEO of Honeywell International) was the most frequent business visitor to the White House during the Obama administration. While Obama's release of the logs was generally praised by transparency activists, [1] the Sunlight Foundation noted, "The voluntary system can be too easily circumvented.
Single-serving visitor pattern. In computer programming, the single-serving visitor pattern is a design pattern. Its intent is to optimise the implementation of a visitor that is allocated, used only once, and then deleted (which is the case of most visitors).
Login. In computer security, logging in (or logging on, signing in, or signing on) is the process by which an individual gains access to a computer system or program by identifying and authenticating themselves. The user credentials are typically some form of a username and a password, [1] and these credentials themselves are sometimes referred ...
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