Comparison of the pros and cons of built-in functions and custom functions in Golang

Golang is a very popular programming language with a very powerful function library. In Golang, functions are considered first-class citizens, which means that Golang functions can be passed, copied, and overloaded like variables. In addition, Golang also provides two types of built-in functions and custom functions. In this article, we will explore the pros and cons of built-in functions and custom functions in Golang to help readers understand when to choose which type of function.

First, let’s look at the built-in functions. Built-in functions are Golang's built-in functions and they do not need to be explicitly defined in the program. Built-in functions include some very useful functions such as string processing, mathematical operations, type conversion, etc. Built-in functions are efficient and stable because they are written and tested by Golang developers themselves. In addition, built-in functions do not need to be installed or imported, you can use them directly.

In contrast, custom functions need to be explicitly defined in the program. Custom functions are functions written based on the developer's needs and used with the application. Custom functions can handle any special operations needed in your program, with specific parameters, return values, names, and functionality. Custom functions have high flexibility and scalability and can cope with any needs in the program that are not solved by built-in functions. Additionally, custom functions are easy to reuse and can be used in other applications.

At the same time, both built-in functions and custom functions have disadvantages. Although built-in functions are convenient, their results may sometimes be unsatisfactory. For example, some limitations of built-in functions may make your needs impossible to achieve. Additionally, built-in functions may not take into account the specific requirements needed in your application. In contrast, custom functions take into account the specific requirements required by your application, but they may not be as efficient as built-in functions. Custom functions need to be explicitly defined, which results in more code and sometimes poor performance.

So the answer to the question of which type of function is better depends on your needs and code implementation. The use of Golang built-in functions makes sense if they meet the application's requirements. Built-in functions provide reliability and efficiency to help speed development and optimize code performance. However, if the built-in functions do not solve the requirements in your application, you need to use custom functions. Custom functions are specially designed based on code requirements and have higher flexibility and scalability.

Conclusion:

Overall, both built-in functions and custom functions have their own advantages and disadvantages in Golang. If you have a lot of built-in functions to use, it is recommended to use built-in functions because of their efficiency and stability. However, if specific functionality is required or the application requires specific requirements that cannot be achieved through built-in functions, then a custom function is required. Using custom functions can add flexibility and scalability to your Golang project.

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