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This article will explain in detail what the applicable scenarios of the observer model are, and the content of the article is of high quality, so the editor will share it with you for reference. I hope you will have some understanding of the relevant knowledge after reading this article.

The applicable scenarios of the observer pattern include: 1, when an abstract model has two aspects, one of which depends on the other; 2, when a change to one object needs to change other objects at the same time, without knowing how many objects need to be changed; 3, when an object must notify other objects, and it can not assume who the other objects are.

Observer mode

Define an one-to-many dependency between objects. When the state of an object changes, all objects that depend on it are notified and updated automatically.

Applicability

When an abstract model has two aspects, one aspect depends on the other. Encapsulate the two in separate objects so that they can be changed and reused independently

When you change one object, you need to change other objects at the same time, without knowing how many objects need to be changed.

When an object must notify other objects, it cannot assume who the other objects are. In other words, you don't know that these objects are tightly coupled.

What are the applicable scenarios of the observer model are shared here, I hope that the above content can be of some help to you, can learn more knowledge. If you think the article is good, you can share it for more people to see.

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