Go值方法 & 指针方法

Posted 2020-09-24 kelamoyujuzhen

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func main() {
28     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
29     fmt.Println("ok1", ok1)
30 
31     _, ok2 := interface{}(SortableStrings{}).(Sortable)
32     fmt.Println("ok2", ok2)
33 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
33     fmt.Println("ok1", ok1)
34 
35     _, ok2 := interface{}(SortableStrings{}).(Sortable)
36     fmt.Println("ok2", ok2)
37 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self *SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
33     fmt.Println("ok1", ok1)
34 
35     _, ok2 := interface{}(SortableStrings{}).(Sortable)
36     fmt.Println("ok2", ok2)
37 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self *SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
33     fmt.Println("ok1", ok1)
34 
35     _, ok2 := interface{}(&SortableStrings{}).(Sortable)
36     fmt.Println("ok2", ok2)
37 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self *SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     _, ok1 := interface{}(&SortableStrings{}).(sort.Interface)
33     fmt.Println("ok1", ok1)
34 
35     _, ok2 := interface{}(&SortableStrings{}).(Sortable)
36     fmt.Println("ok2", ok2)
37 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self *SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     ss := SortableStrings{"2", "3", "1"}
33     ss.Sort()
34     fmt.Println("Sortable Strings", ss)
35     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
36     fmt.Println("ok1", ok1)
37 
38     _, ok2 := interface{}(SortableStrings{}).(Sortable)
39     fmt.Println("ok2", ok2)
40 
41     _, ok3 := interface{}(&SortableStrings{}).(sort.Interface)
42     fmt.Println("ok3", ok3)
43 
44     _, ok4 := interface{}(&SortableStrings{}).(Sortable)
45     fmt.Println("ok4", ok4)
46 }

---

 1 package main
 2 
 3 import (
 4     "fmt"
 5     "sort"
 6 )
 7 
 8 type SortableStrings [3]string
 9 
10 type Sortable interface {
11     sort.Interface
12     Sort()
13 }
14 
15 func (self *SortableStrings) Len() int {
16     return len(self)
17 }
18 
19 func (self *SortableStrings) Less(i, j int) bool {
20     return self[i] < self[j]
21 }
22 
23 func (self *SortableStrings) Swap(i, j int) {
24     self[i], self[j] = self[j], self[i]
25 }
26 
27 func (self *SortableStrings) Sort() {
28     sort.Sort(self)
29 }
30 
31 func main() {
32     ss := SortableStrings{"2", "3", "1"}
33     ss.Sort()
34     fmt.Println("Sortable Strings", ss)
35     _, ok1 := interface{}(SortableStrings{}).(sort.Interface)
36     fmt.Println("ok1", ok1)
37 
38     _, ok2 := interface{}(SortableStrings{}).(Sortable)
39     fmt.Println("ok2", ok2)
40 
41     _, ok3 := interface{}(&SortableStrings{}).(sort.Interface)
42     fmt.Println("ok3", ok3)
43 
44     _, ok4 := interface{}(&SortableStrings{}).(Sortable)
45     fmt.Println("ok4", ok4)
46 }