Encapsulation implementation of golang function in object-oriented programming

Object-oriented encapsulation is implemented through functions in Go language. First create a custom type definition object and then use a function wrapper method with pointer parameters. Access and modify object status through pointer parameters to improve code reusability and maintainability.

Encapsulation implementation of Go language functions in object-oriented programming

Encapsulation is an important principle in object-oriented programming (OOP), which allows us to Bind data and methods together to form an object. In the Go language, functions can be used to implement encapsulation.

Create an object

First, we need to create a custom type that represents the object:

type Person struct {
    name string
    age  int
}

Person The type defines an object with two fields Objects of name and age.

Using function encapsulation methods

Next, we can create functions to encapsulate the methods associated with the Person type. For example, create a method that gets the name of an object:

func (p *Person) GetName() string {
    return p.name
}

Note that the method receives a pointer parameter *Person that points to a pointer to the object, because we want to be able to modify the state of the object.

Practical Case

We can show how to use encapsulation in the following sample program:

package main

import "fmt"

type Person struct {
    name string
    age  int
}

func (p *Person) GetName() string {
    return p.name
}

func main() {
    person := Person{
        name: "John Doe",
        age:  25,
    }
    
    name := person.GetName()
    fmt.Println("Name:", name)
}

In this example:

• We create An object of type Person person.
• Use the GetName() method to get and print the object name.

The output will be:

Name: John Doe

Conclusion

By using functions, we can create encapsulated methods for custom types in the Go language. This allows us to control access to object data and improve code reusability and maintainability.

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