Golang has no functions? ——Some thoughts and experiences of beginners learning Go language
As a beginner, I have reservations about the idea that Go language has no functions.
In other programming languages, functions are considered the core and foundation, the skeleton of the program. However, in the Go language, functions do not occupy this important position, but are replaced by some more advanced concepts. For example: packages, structures, methods, interfaces, etc.
In the Go language, a package is a collection of related functions and types, not a collection of functions. Therefore, a package can contain multiple functions, but these functions do not necessarily have a unified entry point. On the contrary, packages in the Go language adopt the "everyone is the main function" model, that is to say, every Go language program needs a main() function, but this function can be defined in any file and can Choose a different file name.
In addition, the Go language also provides many powerful features to replace functions, such as structures, methods, and interfaces. The structure can be regarded as a basic unit of object-oriented programming. By defining a structure type and a series of methods, many functions of object-oriented programming can be realized. The interface supports duck typing. It does not require that the implementation types must be completely consistent, as long as the methods of the interface are implemented. Through interfaces, we can achieve code reuse and extension.
All these features together constitute the programming model of the Go language, which is simpler, easier to understand and maintain than other programming languages. Moreover, in the Go language, these features can also be flexibly combined and expanded to meet the needs of different scenarios.
Therefore, although Golang does not have the concept of function, it will not become an obstacle to learning and using the Go language. On the contrary, it is precisely because of the existence of these more advanced concepts and features that make the Go language more powerful and flexible.
In short, it is not accurate to say that Golang has no functions. It only performs functional programming in a more advanced and flexible way. For beginners, it is recommended to start learning from more basic features and concepts, and gradually understand and master the programming ideas of Go language.
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