这是Go语言中组合的有效实现吗？

huangapple
go评论105阅读模式
英文:

Is this a valid implementation of composition in Go?

问题

这是一个有效的组合吗？还是还有其他解决方案？

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"strings"
  6. )
  8. type Person struct{ name string }
  10. type Swimmer struct{}
  12. func (s *Swimmer) Swim(name string) {
  13. 	fmt.Println(strings.Join([]string{
  14. 		name,
  15. 		" is swimming",
  16. 	}, ""))
  17. }
  19. type IronMan struct {
  20. 	person  Person
  21. 	swimmer Swimmer
  22. }
  24. func (i *IronMan) Swim() {
  25. 	i.swimmer.Swim(i.person.name)
  26. }
  28. func main() {
  29. 	ironMan := IronMan{
  30. 		person:  Person{"Mariottide"},
  31. 		swimmer: Swimmer{},
  32. 	}
  34. 	ironMan.Swim()
  35. }

这段代码是有效的。它定义了一个名为Person的结构体，一个名为Swimmer的结构体，以及一个名为IronMan的结构体。Swimmer结构体有一个Swim方法，用于打印出人名和" is swimming"的信息。IronMan结构体包含一个Person类型的字段和一个Swimmer类型的字段。IronMan结构体还有一个Swim方法，它调用了Swimmer结构体的Swim方法，并传入了Person结构体的name字段作为参数。在main函数中，创建了一个IronMan实例，并调用了它的Swim方法。运行代码将输出"Marriottide is swimming"。

英文:

Is this valid composition? Or there are other solutions?

  1. package main
  3. import (
  4. 	"fmt"
  5. 	"strings"
  6. )
  8. type Person struct{ name string }
  10. type Swimmer struct{}
  12. func (s *Swimmer) Swim(name string) {
  13. 	fmt.Println(strings.Join([]string{
  14. 		name,
  15. 		" is swimming",
  16. 	}, ""))
  17. }
  19. type IronMan struct {
  20. 	person  Person
  21. 	swimmer Swimmer
  22. }
  24. func (i *IronMan) Swim() {
  25. 	i.swimmer.Swim(i.person.name)
  26. }
  28. func main() {
  29. 	ironMan := IronMan{
  30. 		person:  Person{"Mariottide"},
  31. 		swimmer: Swimmer{},
  32. 	}
  34. 	ironMan.Swim()
  35. }

答案1

得分: 1

Go语言中有struct嵌入：

  1. package main
  3. import (
  4. 	"fmt"
  5. )
  7. type Person struct{ name string }
  9. func (p *Person) Talk(message string) {
  10. 	fmt.Printf("%s says: %s\n", p.name, message)
  11. }
  13. type Swimmer struct {
  14. 	Person
  15. }
  17. func (s *Swimmer) Swim() {
  18. 	fmt.Printf("%s is swimming\n", s.name)
  19. }
  21. type IronMan struct {
  22. 	Swimmer
  23. }
  25. func main() {
  26. 	ironMan := IronMan{Swimmer{Person{"Mariottide"}}}
  28. 	ironMan.Swim()
  29. 	ironMan.Talk("Hey")
  30. }
英文:

Go has struct embedding:

  1. package main
  3. import (
  4. 	"fmt"
  5. )
  7. type Person struct{ name string }
  9. func (p *Person) Talk(message string) {
  10. 	fmt.Printf("%s says: %s\n", p.name, message)
  11. }
  13. type Swimmer struct {
  14. 	Person
  15. }
  17. func (s *Swimmer) Swim() {
  18. 	fmt.Printf("%s is swimming\n", s.name)
  19. }
  21. type IronMan struct {
  22. 	Swimmer
  23. }
  25. func main() {
  26. 	ironMan := IronMan{Swimmer{Person{"Mariottide"}}}
  28. 	ironMan.Swim()
  29. 	ironMan.Talk("Hey")
  30. }

huangapple
  • 本文由 发表于 2017年9月17日 23:30:15
  • 转载请务必保留本文链接：https://go.coder-hub.com/46265777.html
  • composition
  • go
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