code: function (cell) {
        var num = cell.match(/\d+$/),
            alpha = cell.replace(num, '');
  
        return {
          row: parseInt(num[0], 10) - 1,
          col: instance.utils.toNum(alpha)
        };
      }
docs: get cell coordinates
  @param {String} cell A1
  @returns {{row: Number, col: number}}