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  2. Observer pattern - Wikipedia

    en.wikipedia.org/wiki/Observer_pattern

    The observer design pattern is a behavioural pattern listed among the 23 well-known "Gang of Four" design patterns that address recurring design challenges in order to design flexible and reusable object-oriented software, yielding objects that are easier to implement, change, test and reuse. [1]

  3. Whiteboard Pattern - Wikipedia

    en.wikipedia.org/wiki/Whiteboard_Pattern

    Listener Pattern Architecture. The Listener Pattern is typically known as Observer Pattern. It is a Behavioral Pattern (aka Publish-Subscribe), which deals with dynamic changes in the state of different objects. Listener Pattern follows a structure where an event listener is registered to event source.

  4. Design Patterns - Wikipedia

    en.wikipedia.org/wiki/Design_Patterns

    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 .

  5. Talk:Observer pattern - Wikipedia

    en.wikipedia.org/wiki/Talk:Observer_pattern

    A sample UML class and sequence diagram for the Observer design pattern. In the above UML class diagram , the Subject class doesn't update the state of Observer1 and Observer2 directly. Instead, Subject refers to the Observer interface for updating (synchronizing) state ( for each o in observers: o.update() ), which makes the Subject ...

  6. Visitor pattern - Wikipedia

    en.wikipedia.org/wiki/Visitor_pattern

    A visitor pattern is a software design pattern that separates the algorithm from the object structure. Because of this separation, new operations can be added to existing object structures without modifying the structures.

  7. GRASP (object-oriented design) - Wikipedia

    en.wikipedia.org/wiki/GRASP_(object-oriented_design)

    The indirection pattern supports low coupling and reuses potential between two elements by assigning the responsibility of mediation between them to an intermediate object. An example of this is the introduction of a controller component for mediation between data (model) and its representation (view) in the model-view-controller pattern.

  8. Iterator pattern - Wikipedia

    en.wikipedia.org/wiki/Iterator_pattern

    In object-oriented programming, the iterator pattern is a design pattern in which an iterator is used to traverse a container and access the container's elements. The iterator pattern decouples algorithms from containers; in some cases, algorithms are necessarily container-specific and thus cannot be decoupled.

  9. Pattern-Oriented Software Architecture - Wikipedia

    en.wikipedia.org/wiki/Pattern-Oriented_Software...

    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 ]