如何使用go复制公共变量？

Question

How to copy a public variable use go?

For example, a public variadble named PublicVar

a := []string{"A", "B"}
b := a
fmt.Printf("%v
", a)
fmt.Printf("%v
", b)

b[0] = "C"
fmt.Printf("%v
", a)
fmt.Printf("%v
", b)
// a has been changed.

The PublicVar's name will be changed, but this is not what I want.

I just want to copy the value of PublicVar.

Answer 1

This happen because probably PublicVar is a pointer to an instance. So temp is also pointing to the same instance. You can get a value type by following.

temp := *PublicVar
temp.name = "bob"

See an example at Playground

Edit: Since the question is edited to show the variable of concern is a slice, khrm's answer is more relevant.