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  2. Composition over inheritance - Wikipedia

    en.wikipedia.org/wiki/Composition_over_inheritance

    Composition over inheritance (or composite reuse principle) in object-oriented programming (OOP) is the principle that classes should favor polymorphic behavior and code reuse by their composition (by containing instances of other classes that implement the desired functionality) over inheritance from a base or parent class. [2]

  3. Entity component system - Wikipedia

    en.wikipedia.org/wiki/Entity_component_system

    The ECS uses composition, rather than inheritance trees. An entity will be typically made up of an ID and a list of components that are attached to it. Any game object can be created by adding the correct components to an entity. This allows the developer to easily add features to an entity, without any dependency issues.

  4. Class diagram - Wikipedia

    en.wikipedia.org/wiki/Class_diagram

    The composite aggregation (colloquially called composition) relationship is a stronger form of aggregation where the aggregate controls the lifecycle of the elements it aggregates. The graphical representation is a filled diamond shape on the containing class end of the line that connect contained class(es) to the containing class.

  5. Class hierarchy - Wikipedia

    en.wikipedia.org/wiki/Class_hierarchy

    In general, the further down in the hierarchy a class appears, the more specialized its behavior. When a message is sent to an object, it is passed up the inheritance tree starting from the class of the receiving object until a definition is found for the method. This process is called upcasting.

  6. Inheritance (object-oriented programming) - Wikipedia

    en.wikipedia.org/wiki/Inheritance_(object...

    Inheritance is contrasted with object composition, where one object contains another object (or objects of one class contain objects of another class); see composition over inheritance. In contrast to subtyping’s is-a relationship, composition implements a has-a relationship.

  7. Composite pattern - Wikipedia

    en.wikipedia.org/wiki/Composite_pattern

    Composite pattern in UML. Component. is the abstraction for all components, including composite ones; declares the interface for objects in the composition (optional) defines an interface for accessing a component's parent in the recursive structure, and implements it if that's appropriate; Leaf. represents leaf objects in the composition

  8. Abstract factory pattern - Wikipedia

    en.wikipedia.org/wiki/Abstract_factory_pattern

    UML class diagram. The abstract factory pattern in software engineering is a design pattern that provides a way to create families of related objects without imposing their concrete classes, by encapsulating a group of individual factories that have a common theme without specifying their concrete classes. [1]

  9. Delegation pattern - Wikipedia

    en.wikipedia.org/wiki/Delegation_pattern

    In software engineering, the delegation pattern is an object-oriented design pattern that allows object composition to achieve the same code reuse as inheritance. In delegation, an object handles a request by delegating to a second object (the delegate). The delegate is a helper object, but with the original context.