golang gets method name

In the field of programming, getting the method name is a very common task. In Golang, getting the method name is also a simple and important operation. In this article, we will discuss how to get method name in Golang.

Golang is a modern programming language that is widely used in web development, data science, machine learning and other fields. Its syntax is simple, execution speed is fast, and concurrency performance is strong, so it is favored by developers.

Methods in Golang

In Golang, methods are functions executed on structure types. Types can be any user-defined type, including structures, interface types, and primitive types.

The general form of method definition is as follows:

func (t Type) methodName(parameter_list) (return_type) {
   // 函数体
}

Among them, "func" represents the function definition, "(t Type)" represents the receiver of the method, and the parameter list and return value are the same as ordinary functions. .

The receiver can be a value receiver or a pointer receiver. If a value receiver is used, the value of the receiver variable modified by the method will not be reflected in the original data; if a pointer receiver is used, the value of the receiver variable modified by the method will be reflected in the original data.

The following is a simple method example:

package main

import "fmt"

type Rectangle struct {
    length, width float64
}

func (r Rectangle) Area() float64 {
    return r.length * r.width
}

func main() {
    r1 := Rectangle{12, 2}
    fmt.Println("矩形面积：", r1.Area())
}

In the above example, we define a "Rectangle" structure and an "Area()" method for calculating the rectangle area. In the "main()" function, we create a Rectangle object and call the Area() method to calculate its area.

How to get the method name

To get the name of the method in Golang, we need to use the reflect package. This package allows us to manipulate the types and values ​​of objects at runtime.

The method name in Golang is actually a string. We can use the Type() method in the reflect package to get the type of the method and get the name of the method from it.

The following is an example:

package main

import (
    "fmt"
    "reflect"
)

type Rectangle struct {
    length, width float64
}

func (r Rectangle) Area() float64 {
    return r.length * r.width
}

func main() {
    r := Rectangle{10, 20}

    // 获取方法名称
    method := reflect.TypeOf(r).Method(0).Name

    fmt.Println("方法名称：", method)
}

In the above example, we first create a Rectangle object and call the Area() method on it. We then use the Type() method of the reflect package to get the object type and get the method name from it.

The Type() method returns the Method type, and we can use its Name() method to get the method name.

In this example, our method list has only one method, so "Method(0)" is used to obtain the method. If there are multiple methods, they should be accessed using different index values.

Summary

Getting the method name in Golang is a very simple yet important task. We can use the Type() method and Method() method in the reflect package to access the object type and method list and get the method names from them.

However, it should be noted that the method name is actually a string, which needs to be converted through reflection at runtime. Therefore, you need to be careful when using the reflect package to ensure the correctness and performance of the code.

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