如何在Golang中初始化嵌套结构数组的值

Question

My struct

type Result struct {
   name   string
   Objects []struct {
       id int
   }
}

Initialize values for this

func main() {
   var r Result;
   r.name  = "Vanaraj";
   r.Objects[0].id = 10;
   fmt.Println(r)
}

I got this error. "panic: runtime error: index out of range"

How to fix this?

Answer 1

Objects contains no elements. You need to append element first. Like this:

r.Objects = append(r.Objects, struct{ id int }{}) 

Also you can omit r.Objects[0].id = 10; using initialization of your struct like this:

r.Objects = append(r.Objects, struct{ id int }{ 10 })