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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. This can decrease the time to develop software and increase the quality of the ...
Interaction design patterns are design patterns applied in the context human-computer interaction, describing common designs for graphical user interfaces. A design pattern is a formal way of documenting a solution to a common design problem. The idea was introduced by the architect Christopher Alexander for use in urban planning and building ...
Dark pattern. A dark pattern (also known as a "deceptive design pattern ") is "a user interface that has been carefully crafted to trick users into doing things, such as buying overpriced insurance with their purchase or signing up for recurring bills". [1] [2] [3] User experience designer Harry Brignull coined the neologism on 28 July 2010 ...
Anti-pattern. An anti-pattern in software engineering, project management, and business processes is a common response to a recurring problem that is usually ineffective and risks being highly counterproductive. [ 1][ 2] The term, coined in 1995 by computer programmer Andrew Koenig, was inspired by the book Design Patterns (which highlights a ...
Observer pattern. In software design and engineering, the observer pattern is a software design pattern in which an object, named the subject, maintains a list of its dependents, called observers, and notifies them automatically of any state changes, usually by calling one of their methods . It is often used for implementing distributed event ...
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 ...
An architectural pattern is rather a concept that solves and delineates some essential cohesive elements of a software architecture. Countless different architectures may implement the same pattern and thereby share the related characteristics. Furthermore, patterns are often defined as something "strictly described and commonly available".
A class diagram exemplifying the singleton pattern. In software engineering, the singleton pattern is a software design pattern that restricts the instantiation of a class to a singular instance. One of the well-known "Gang of Four" design patterns, which describes how to solve recurring problems in object-oriented software, [ 1] the pattern is ...