code: function getMinWidthByTableCells( cells ) {
  
          var minWidth = Number.MAX_VALUE;
  
          for( var i = 0, curCell; curCell = cells[ i ] ; i++ ) {
  
              minWidth = Math.min( minWidth, curCell.width || getTableCellWidth( curCell ) );
  
          }
  
          return minWidth;
  
      }
docs: 通过给定的单元格集合获取最小的单元格width