Look at the program:
package main
import (
"fmt"
"time"
)
func main() {
str := []string{"I","like","Golang"}
for _, v := range str{
v += "good"
}
for k, v := range str{
(k, v)
}
(1e9)
}
result:
0 I
1 like
2 Golang
Think about why.
Look again:
package main
import (
"fmt"
"time"
)
func main() {
str := []string{"I","like","Golang"}
for k, v := range str{
(&k, &v)
}
(1e9)
}
result:
0xc000012050 0xc00000e1e0
0xc000012050 0xc00000e1e0
0xc000012050 0xc00000e1e0
Think about why.
Look again:
package main
import (
"fmt"
"time"
)
func main() {
str := []string{"I","like","Golang"}
for k, v := range str{
str = append(str, "good")
(k, v)
}
(1e9)
}
result:
0 I
1 like
2 Golang
Think about why.
Look again:
package main
import (
"fmt"
"time"
)
func main() {
str := []string{"I","like","Golang"}
for k, v := range str{
go func(i int, s string){
(i, s, k, v)
}(k, v)
}
(1e9)
}
result:
0 I 2 Golang
1 like 2 Golang
2 Golang 2 Golang
Think about why.
Finally, look at:
package main
import (
"fmt"
"time"
)
func main() {
str := []string{"I","like","Golang"}
for k, v := range str{
go func(i int, s string){
(i, s, k, v)
}(k, v)
(1e9)
}
(5e9)
}
result:
0 I 0 I
1 like 1 like
2 Golang 2 Golang
Think about why.
Not to say much.
Summarize
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