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What this article shares to you is about the applicable scenarios of the singleton model. The editor thinks it is very practical, so I share it with you. I hope you can get something after reading this article. Let's take a look at it with the editor.

The applicable scenarios of the singleton pattern include: 1, when the class can only have one instance and the customer can access it from a well-known access point; 2, when the only instance should be extensible through subclassing, and the customer should be able to use an extended instance without changing the code.

Applicability

When a class can have only one instance and the customer can access it from a well-known access point

When this unique instance should be extensible by subclassing and the customer should be able to use an extended instance without changing the code

Singleton mode

Ensure that there is only one instance of a class and provide a global access point to it. Let the class itself be responsible for saving its unique instance and provide a method to access that instance. This is the singleton pattern.

The above are the applicable scenarios of the singleton model, and the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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