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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 ...
In software engineering, double-checked locking (also known as "double-checked locking optimization" [1]) is a software design pattern used to reduce the overhead of acquiring a lock by testing the locking criterion (the "lock hint") before acquiring the lock. Locking occurs only if the locking criterion check indicates that locking is required.
Mary Lou York, 19. Date. June 1, 1979. Charles Laverne Singleton (March 29, 1959 – January 6, 2004) was an American convicted murderer, who, at the time of his execution, lived on death row in Arkansas longer than any other state inmate. [ 1] He was executed in 2004 for the June 1, 1979, murder of 19-year-old Hamburg store owner Mary Lou York ...
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 ...
The curiously recurring template pattern ( CRTP) is an idiom, originally in C++, in which a class X derives from a class template instantiation using X itself as a template argument. [ 1] More generally it is known as F-bound polymorphism, and it is a form of F -bounded quantification .
Date of Execution Details Edmund Dudley: 17 August 1510 Member of the Council Learned in the Law, Speaker of the House of Commons, and President of King's Council under Henry VII. Executed for constructive treason. Sir Richard Empson: Speaker of the House of Commons and knight of the shire for Northamptonshire in the English Parliament under ...
Command pattern. In object-oriented programming, the command pattern is a behavioral design pattern in which an object is used to encapsulate all information needed to perform an action or trigger an event at a later time. This information includes the method name, the object that owns the method and values for the method parameters.
The builder pattern is a design pattern that provides a flexible solution to various object creation problems in object-oriented programming. The builder pattern separates the construction of a complex object from its representation. It is one of the 23 classic design patterns described in the book Design Patterns (often referred to as the ...