嵌套的结构体初始化数组：如果两个结构体的构造函数都可用，该怎么办？

Question

New to golang. I have two struct types (called Inner, Outer), and have constructors for each of them that I would like to use. Outer struct "has-a" 2d array of Inner struct. How do I use the constructor for the inner type inside the constructor of outer struct, to initialize the array of inner?

type Inner struct {
  val int
}

func newInner(val int) *Inner {
  i:=new(Inner)
  i.val=val
  return i
}


type Outer struct {
  members [][]Inner
  row int
  col int
}

func newOuter(row int, col int) *Outer {
  o:=new(Outer)
  o.row=row
  o.col=col
  //how do I initialize a 2d array of size [row][col] and 
  //using the constructor for inner?
  return o  
}

</div>

Answer 1

You can use make and then iterate through the matrix to initialize it.

    defaultInner := newInner(100)
    o.members = make([][]Inner, o.row)
    for i := 0; i < o.row; i++ {
        o.members[i] = make([]Inner, o.col)
        for j := 0; j < o.col; j++ {
            o.members[i][j] = *defaultInner
        }
    }