Arrays of Arrays

[xroot]

In the following code from ver. a118 help docs under Arrays of Arrays

Code: Select all

class Array2D extends Array {
    __new(x, y) {
        this.Length := x * y
        this.Width := x
        this.Height := y
    }
    __Item[x, y] {
        get => base[this.Width * (y-1) + x]
        set => base[this.Width * (y-1) + x] := value
    }
}

grid := Array2D.new(4, 3)
grid[4, 1] := "#"
grid[3, 2] := "#"
grid[2, 2] := "#"
grid[1, 3] := "#"
gridtext := ""
Loop grid.Height {
    y := A_Index
    Loop grid.Width {
        x := A_Index
        gridtext .= grid[x, y] || "-"
    }
    gridtext .= "`n"
}
MsgBox gridtext

I get this:

• Warning: This variable appears to never be assigned a value.
  
  Specifically: local base
  
  Line#
  000: }
  023: {
  024: this.Length := x * y
  025: this.Width := x
  026: this.Height := y
  027: }
  029: {
  ---> 029: Return base[this.Width * (y-1) + x]
  029: }
  030: {
  030: Return base[this.Width * (y-1) + x] := value
  030: }
  034: grid := Array2D.new(4, 3)
  035: grid[4, 1] := "#"
  036: grid[3, 2] := "#"

What is the best way to fix this.
Thanks

[swagfag]

base should be super