Trying to create array of arrays in a way the book suggests:

  val cells = new Array[Array[Cell]](height, width)

yields compiler error:

  too many arguments for constructor Array: (_length:
Int)Array[Array[Model.this.Cell]]

So I used:

  val cells = Array.ofDim[Cell](height, width)

listing 35.7 :

case Coord(row, column) =>
cells(row)(column).value <-----