Struct Composition Go

employee.go

type Employee struct {
	Name            string
	Age             int
	Height          float32 // cm
	Gender          string
	PositionName    string
	MonthsOfService int
	Department      string
}

employee_human.go

type Employee struct {
	Human           Human
	PositionName    string
	MonthsOfService int
	Department      string
}

employee_introduction.go

func (e *Employee) Introduction() {
	fmt.Printf("Hello my name is %s. My age is %d. Nice to meet you :)\n", e.Name, e.Age)
	fmt.Printf("I have been working on the department of %s at company X as a %s for almost %d years now", e.Department, e.PositionName, e.MonthsOfService)
}

employee_is_human.go

type Employee struct {
	Human
	PositionName    string
	MonthsOfService int
	Department      string
}

employee_main.go

func NewEmployee(
	person Human,
	positionName string,
	monthsOfService int,
	department string,
) *Employee {
	return &Employee{
		Human:           person,
		PositionName:    positionName,
		MonthsOfService: monthsOfService,
		Department:      department,
	}
}

func main() {
	person := NewHuman("John Doe", 24, 180, "Male")
	employee := NewEmployee(*person, "Sr. Software Engineer", 2, "Core Banking Integration")
	employee.Introduction()

	employee.SetName("Mariah Carey")
	employee.Introduction()
}

full_code.go

// You can run this code on https://go.dev/play/

import "fmt"

type Human struct {
	Name   string
	Age    int
	Height float32 // cm
	Gender string
}

func NewHuman(name string, age int, height float32, gender string) *Human {
	return &Human{
		Name:   name,
		Age:    age,
		Height: height,
		Gender: gender,
	}
}

func (h *Human) SetName(name string) {
	h.Name = name
}

func (h *Human) Introduction() {
	fmt.Printf("Hello my name is %s. My age is %d. Nice to meet you :)\n", h.Name, h.Age)
}

type Employee struct {
	Human
	PositionName    string
	MonthsOfService int
	Department      string
}

func NewEmployee(
	person Human,
	positionName string,
	monthsOfService int,
	department string,
) *Employee {
	return &Employee{
		Human:           person,
		PositionName:    positionName,
		MonthsOfService: monthsOfService,
		Department:      department,
	}
}

func (e *Employee) Introduction() {
	fmt.Printf("Hello my name is %s. My age is %d. Nice to meet you :)\n", e.Name, e.Age)
	fmt.Printf("I have been working on the department of %s at company X as a %s for almost %d years now", e.Department, e.PositionName, e.MonthsOfService)
}

func main() {
	human := NewHuman("John Doe", 24, 180, "Male")
	human.Introduction()
	human.SetName("Mariah Carey")
	human.Introduction()

	fmt.Println("\n================================================================\n")

	person := NewHuman("John Doe", 24, 180, "Male")
	employee := NewEmployee(*person, "Sr. Software Engineer", 2, "Core Banking Integration")
	employee.Introduction()
}

human.go

type Human struct {
	Name   string
	Age    int
	Height float32
	Gender string
}

human_factory.go

func NewHuman(name string, age int, height float32, gender string) *Human {
	return &Human{
		Name:   name,
		Age:    age,
		Height: height,
		Gender: gender,
	}
}

human_main.go

func main() {
	human := NewHuman("John Doe", 24, 180, "Male")
	human.Introduction()
	fmt.Println("")
	human.SetName("Mariah Carey")
	human.Introduction()
}

human_methods.go

func (h *Human) SetName(name string) {
	h.Name = name
}

func (h *Human) Introduction() {
	fmt.Printf("Hello my name is %s. My age is %d. Nice to meet you :)", h.Name, h.Age)
}