Observer is a behavioral design pattern that allows some objects to notify other objects about changes in their state . The Observer pattern provides a way to subscribe and unsubscribe to and from these events for any object that implements a subscriber interface.
Read moreWhat is the purpose of observer design pattern?
The name of the design pattern is Observer. The intent of this design pattern is to provide a loose coupling between an observable subject and one or more observers . A subject notifies it observers whenever its (the subject’s) state changes.
Read moreWhen should you use Observer pattern?
Use the Observer pattern when changes to the state of one object may require changing other objects , and the actual set of objects is unknown beforehand or changes dynamically. You can often experience this problem when working with classes of the graphical user interface.
Read moreHow does Bridge pattern work?
The Bridge pattern lets you split the monolithic class into several class hierarchies . After this, you can change the classes in each hierarchy independently of the classes in the others. This approach simplifies code maintenance and minimizes the risk of breaking existing code.
Read moreWhy do we use bridge patterns?
Bridge is used when we need to decouple an abstraction from its implementation so that the two can vary independently . This type of design pattern comes under structural pattern as this pattern decouples implementation class and abstract class by providing a bridge structure between them.
Read moreWhat is Bridge pattern C++?
Bridge is a structural design pattern that divides business logic or huge class into separate class hierarchies that can be developed independently . One of these hierarchies (often called the Abstraction) will get a reference to an object of the second hierarchy (Implementation).
Read moreWhat is the difference between command and strategy pattern?
The main difference is , the command does some action over the object . It may change the state of an object. While Strategy decides how to process the object. It encapsulates some business logic.
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