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 software development, we often encounter situations where we need to dynamically select algorithms or behaviors. In order to avoid using a large number of conditional statements (such as if-else or switch-case) in the code, the Strategy Pattern provides an elegant solution. Through the Strategy Pattern, we can encapsulate algorithms or behaviors into independent classes and switch them freely at runtime. This article will introduce the concept of the Strategy Pattern in detail, the difference between it and other similar patterns, the problems it solves, Gol…

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. …