可以在golang中使用批量分配吗？

Question

I have my struct like this:

type User struct {
    Id uint64
    Email string
}

And I know, that I can declare it like this:

user := User{
    Id: 1,
    Email: "[e-mail]",
}

And I can update it like this:

user.Id = 2
user.Email = "[e-mail]"

Is it possible to use similar construction like for creating but for updating struct?

Answer 1

No, there really isn't an equivalent multi-property setter.

EDIT:

Possibly with reflection you could do something like:

updates := user := User{
  Email: "[e-mail]",
}
//via reflection (pseudo code)
for each field in target object {
  if updates.field is not zero value{
     set target.field = updates.field
  }
}

The reflection part could be factored into a function updateFields(dst, src interface{}), but I would generally say the complexity is not worth the savings. Just have a few lines of setting fields one by one.