api.js

// I'm trying to hide most of the JS class and provide a public API in this style.
GridGame.classes.board = function () {
  this.rows = [['1', '2'], ['3', '4']];

  this.draw_row = function (row_index, row_tiles) {
    //...
  };

  return {
    draw: function () {
      GridGame.table.empty();
      $.each(this.rows, this.draw_row);
    }
  }
};

// It's not working because within the returned object, 'this.rows' and 'this.draw_row' are undefined.