英文:
Best practice of counter in map struct golang
问题
我有一个代码不够简洁的问题。我想在NameLike结构体中递增Counter，但我认为这样做不够有效。
package main
import "fmt"
type NameLike struct {
Name string
Counter int
}
func main() {
sosmed := make(map[string]NameLike)
sosmed["rizal"] = NameLike{"Rizal Arfiyan", 10}
for i := 1; i < 10; i++ {
sosmed["rizal"] = NameLike{
Counter: sosmed["rizal"].Counter + 1,
}
}
fmt.Println(sosmed)
}
你对这段代码有什么想法，如何使其更简洁？
sosmed["rizal"].Counter++
英文:
I have a code that is not clean. I want to increment Counter in struct of NameLike but I think this is not effective.
package main
import "fmt"
type NameLike struct {
Name string
Counter int
}
func main() {
sosmed := make(map[string]NameLike)
sosmed["rizal"] = NameLike{"Rizal Arfiyan", 10}
for i := 1; i < 10; i++ {
sosmed["rizal"] = NameLike{
Counter: sosmed["rizal"].Counter + 1,
}
}
fmt.Println(sosmed)
}
do you have any ideas regarding this code, to make it clean?
sosmed["rizal"] = NameLike{
Counter: sosmed["rizal"].Counter + 1,
}
This link for Golang Playground
答案1
得分: 1
有几种方法可以简化这段代码。
当前的代码通过值传递 NameLike。如果你改为通过引用传递，可以简化一些东西：
package main
import "fmt"
type NameLike struct {
Name string
Counter int
}
func main() {
sosmed := make(map[string]*NameLike)
sosmed["rizal"] = &NameLike{"Rizal Arfiyan", 10}
for i := 1; i < 10; i++ {
sosmed["rizal"].Counter++
}
fmt.Println(sosmed["rizal"])
}
https://play.golang.org/p/-xvCJyqQ6V0
英文:
There are a few approaches you could take to simplify this code.
The current map passes NameLike by value. If you pass by reference, you can simplify things a bit:
package main
import "fmt"
type NameLike struct {
Name string
Counter int
}
func main() {
sosmed := make(map[string]*NameLike)
sosmed["rizal"] = &NameLike{"Rizal Arfiyan", 10}
for i := 1; i < 10; i++ {
sosmed["rizal"].Counter++
}
fmt.Println(sosmed["rizal"])
}
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