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 some software systems, we need to deal with complex business rules, syntax parsing or expression evaluation. In order to simplify the parsing and processing of these logics, the Interpreter Pattern provides an elegant solution. The Interpreter Pattern is often used to build a custom language or simplify complex rule engines, such as mathematical expression evaluation, command parsers, configuration file parsing, and other scenarios. This article will introduce the concept of the Interpreter Pattern, the difference from other patterns, and the problems it solves...

In software development, we often encounter the need to save the historical state of an object so that it can be restored to a specific state when necessary. For example, a text editor needs to support undo and redo functions, and a game needs to record the player's save files. In order to elegantly implement state preservation and restoration, the Memento Pattern provides an excellent solution. This article will introduce the concept of the Memento Pattern in detail, the difference between it and other design patterns, the problems it solves, its implementation in Golang, and how to use it in...

In software development, it is a common requirement to handle behavior changes when an object changes state. In order to avoid using complex conditional judgments in the code, the State Pattern provides an elegant solution. Through the State Pattern, we can encapsulate the behaviors of different states into independent state classes, making state management clearer and more flexible. This article will explore the concept of the State Pattern, the difference from other patterns, the problems it solves, implementation examples in Golang, and practical applications of the State Pattern.

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 software development, when the overall structure of some business logic is the same, but the implementation of some steps needs to be flexibly adjusted, the Template Method Pattern can provide an elegant solution. It defines a common framework for the algorithm and leaves part of the implementation to the subclasses, making the code more flexible and easy to expand. This article will introduce the concept of the Template Method Pattern in detail, the difference between other patterns, the problems it solves, implementation examples in Golang, and practical development...

In software development, we often need to traverse elements in data structures, such as collections, arrays, or linked lists. In order to avoid coupling the traversal logic inside the data structure and improve the readability and scalability of the code, the Iterator Pattern came into being. This article will introduce in detail the concept of the Iterator Pattern, the difference from other patterns, the problems it solves, and how to implement and use the Iterator Pattern in Golang. What is the Iterator Pattern?

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. …

In complex software systems, we often encounter a scenario where when the state of an object changes, other objects need to be notified so that they can react accordingly. If dependencies are established directly between these objects, the coupling of the system will increase significantly and the code will become difficult to maintain. The Observer Pattern helps us solve this problem elegantly through the publish-subscribe method. This article will introduce the concept of the Observer Pattern, the difference between it and other similar patterns, and how to solve it.