كل مايخص الحاسوب والبرامج (كمبيوتر -اندرويد) برمجة وغيرها

When the state inside an object changes, it can not change its behavior by switching to a set of different operations

................... can be seen as a dynamic version of the Strategy pattern.

Strategy pattern allows an object to alter its behavior dynamically according to its internal state.

.A Strategy defines a set of algorithms that can be used interchangeably.

The Decorator patterns capture ways of expressing the division of operations between classes and optimize how the communication should be handled

The operations that make up a single algorithm might be split up between different classes, making a complex arrangement that is difficult to manage and maintain.

..................are concerned with algorithms and communication between them.

The proxy is often a small (public) object that stands in for a more complex (private) object that is activated once certain circumstances are clear.

.................supports objects that control the creation of and access to other objects

There are several kinds of proxies except:

•The role of the .............. pattern is to provide a way of attaching new state and behavior to an object dynamically.

In Adapter Pattern alterations to the original code are required.

..............pattern is a versatile(many ways of use ) pattern that joins together types that were not designed to work with each other.

Subsystem classes

Adapter defines a higher-level interface that makes the subsystem easier to use

Provide a unified interface to a set of interfaces in a subsystem

Creational:

............includes Abstract Factory, Singleton ,Double-Checked Locking and Factory Method

............The purpose of this type is to Give a way to manifest flexible (varying) behavior ,this type is a strategy .It is used for containing variation.

Bridge and Decorator used for relating implementation with abstraction.