How to rewrite golang

With the advent of the era of cloud computing and big data, programming languages ​​are also constantly evolving. Among them, Golang has become one of the programming languages ​​that more and more developers pay attention to and use due to its efficient concurrency model and rich library support. However, in actual business scenarios, some functions or methods of Golang may need to be rewritten to meet specific needs. This article will introduce knowledge about rewriting in Golang and provide some practical tips.

1. The reason for Golang rewriting

Golang is a programming language that is very suitable for high concurrency and distributed scenarios, and is usually used to build network and background applications. However, in actual development, there may be situations where Golang functions or methods need to be rewritten. The main reasons are as follows:

(1) Performance Optimization

When developing Golang applications, if you find that the performance of some functions or methods is not good enough, you may need to rewrite them. to improve the overall performance of the program. For example, when processing large data collections, synchronization locks in Golang may become a performance bottleneck, and the use of locks needs to be optimized.

(2) Interface Unification

In the process of multi-person collaborative development, various functions and methods may appear, and even problems such as irregular naming and inconsistent parameters may occur. It will have a great impact on the maintenance and subsequent development of the code. At this point, it needs to be reconstructed and rewritten to make the interface more unified.

(3) Adding new features

As business needs continue to change and develop, some new features may need to be added. At this time, the original code may need to be rewritten to adapt to the addition of new features.

2. Golang overriding method

Golang overriding can be divided into two methods: inheritance and combination. The implementation methods of these two methods will be introduced below.

(1) Inheritance method

Inheritance rewriting refers to the method of adding or deleting some functions based on the original code. The specific implementation method is as follows:

type myString string

func (s myString) MyToUpper() myString {
    return myString(strings.ToUpper(string(s))) // 增加功能
}

func (s myString) MyTrimSpace() myString {
    return myString(strings.TrimSpace(string(s))) // 去除空格
}

In the above code, we used type aliases to create a new type "myString", and rewritten its corresponding MyToUpper and MyTrimSpace methods to add or delete some features. When using it, you only need to use the myString type to call the corresponding method.

(2) Combination method

The combination method refers to adding a new type on the basis of the original code, using the original type as its member variable, and then adding the new type to the new type. How to extend functionality. The specific implementation method is as follows:

type myString struct {
    str string
}

func NewMyString(s string) *myString {
    return &myString{str: s}
}

func (s *myString) MyToUpper() *myString {
    s.str = strings.ToUpper(s.str) // 增加功能
    return s
}

func (s *myString) MyTrimSpace() *myString {
    s.str = strings.TrimSpace(s.str) // 去除空格
    return s
}

In the above code, we added a new type named "myString", used the string type as its member variable, and implemented the MyToUpper and MyTrimSpace methods on the new type, thereby adding or removing some features. When using it, you need to first use the NewMyString function to create an instance of the myString type and call the corresponding method on the instance.

It should be noted that when rewriting using the combination method, you need to first understand the internal structure and implementation of the original type, and expand on this basis.

3. Golang rewriting skills

In the process of Golang rewriting, there are some practical skills that can make code writing more concise and efficient.

(1) Use function variables for batch rewriting

You can use the function variable type Func variable type Func to implement batch rewriting of a certain type. The specific implementation method is as follows:

type myString string

type MyStringFunc func(s myString) myString

func (s myString) MyToUpper() myString {
    return myString(strings.ToUpper(string(s)))
}

func (s myString) MyTrimSpace() myString {
    return myString(strings.TrimSpace(string(s)))
}

func (s myString) MyBatch(fns []MyStringFunc) myString {
    for _, fn := range fns {
        s = fn(s) // 批量重写
    }
    return s
}

In the above code, we have added a new MyBatch method, which rewrites the myString type method in batches by passing in a set of MyStringFunc functions. When using it, you only need to put the MyStringFunc function into the slice to achieve one-time rewriting.

(2) Use interfaces for rewriting

When you need to implement a certain logic, you can use interfaces to define the methods that need to be implemented, and implement different types of rewriting through polymorphism. The specific implementation method is as follows:

type StringInterface interface {
    MyToUpper() string
    MyTrimSpace() string
}

type myString string

func (s myString) MyToUpper() string {
    return string(strings.ToUpper(string(s)))
}

func (s myString) MyTrimSpace() string {
    return string(strings.TrimSpace(string(s)))
}

func (s myString) MyOperate(si StringInterface) string {
    return si.MyToUpper() + si.MyTrimSpace() // 其他操作
}

In the above code, we define a StringInterface interface, which contains two methods: MyToUpper and MyTrimSpace. At the same time, we rewrote the two methods corresponding to the myString type, and used polymorphism to implement different types of rewriting through the MyOperate method.

4. Summary

Golang rewriting is a very practical technology that can extend or delete the functionality of the original function or method to meet specific needs. When rewriting in Golang, you need to understand the different implementation methods, and you can use some techniques to write the code more efficiently and concisely.

The above is the detailed content of How to rewrite golang. For more information, please follow other related articles on the PHP Chinese website!