Golang Gin: Implementing Interfaces

 interfaces define a set of methods. Any type that implements these methods satisfies the interface.

Example of an Interface Implementation:

package main

==========================
import "fmt"

// Interface definition
type Printable interface {
	PrintInfo() string
}

==========================
// Struct that implements the interface
type User struct {
	Name  string
	Email string
}

==========================
// Implement the interface
func (u User) PrintInfo() string {
	return fmt.Sprintf("Name: %s, Email: %s", u.Name, u.Email)
}

==========================
func main() {
	user := User{Name: "Le Giang", Email: "le.giang@example.com"}
	var p Printable = user // User satisfies the Printable interface
	fmt.Println(p.PrintInfo())
}

Output:

Name: Le Giang, Email: le.giang@example.com