In object-oriented systems, we often need to perform different operations on complex data structures. If the operation logic is embedded directly inside the data structure, it will not only increase the complexity of the class, but also make the code difficult to maintain and expand. The Visitor Pattern provides an elegant way to define new operations for these structures by separating operations from data structures. This article will introduce the concept of the Visitor Pattern in detail, the difference from other patterns, the problems it solves, and implementation examples in Golang...

In a complex system, some requests need to be processed by multiple objects, and these objects may have different processing logic. If we use conditional statements in each object to handle these requests, it will not only increase the complexity of the code, but also make the system difficult to maintain. The Chain of Responsibility Pattern elegantly solves this problem by passing requests along the processing chain to achieve decoupling between objects. This article will introduce the Chain of Responsibility Pattern in detail...

In complex software systems, we often need to encapsulate requests as objects to support functions such as parameterization, cancellation, and queuing of requests. The Command Pattern provides an elegant solution to this requirement. It is a behavioral design pattern that decouples requests from executors by encapsulating requests as objects. This article will introduce the concept of the Command Pattern, the difference from other similar patterns, the problems it solves, its implementation in Golang, and the precautions in actual development. …