How to create golang method?

Steps to create a Go method: 1. Define the method syntax: func (receiver_type) method_name (parameters) return_type; 2. Call the method: instance_of_struct_type.method_name (arguments).

How to create a Go method

Define a method

In Go, a method is a function bound to a struct type. To create a method in a struct type, use the following syntax:

func (receiver_type) method_name(parameters) return_type

where

• receiver_type is the struct type to which the method belongs.
• method_name is the name of the method.
• parameters is the list of parameters accepted by the method.
• return_type is the type returned by the method.

Example

Create a Person structure with a getName method:

type Person struct {
    name string
}

func (p Person) getName() string {
    return p.name
}

Call method

To call a method, use the following syntax:

instance_of_struct_type.method_name(arguments)

where

• instance_of_struct_type is the instance of the structure on which the method is to be called.
• method_name is the name of the method to be called.
• arguments are the parameters to be passed to the method.

Practical Case

Consider a web application that manages a list of users. We can create a User structure to represent the user, which contains the getName and setName methods:

type User struct {
    name string
}

func (u *User) getName() string {
    return u.name
}

func (u *User) setName(name string) {
    u.name = name
}

We can use these methods to retrieve And modify the user's name:

user := &User{name: "John Doe"}
fmt.Println(user.getName()) // 输出："John Doe"

user.setName("Jane Doe")
fmt.Println(user.getName()) // 输出："Jane Doe"

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