如何根据包含数据的特定列数将一行拆分为多行

function splitRowByColumnCount(row, columnCount, delimiter) {
  var dataArray = row.split(delimiter); // 拆分原始行数据为数组
  var rowCount = Math.ceil(dataArray.length / columnCount); // 计算行数

  var resultArray = [];
  for (var i = 0; i < rowCount; i++) {
    var newRow = [];
    for (var j = 0; j < columnCount; j++) {
      var dataIndex = i * columnCount + j;
      if (dataIndex < dataArray.length) {
        newRow.push(dataArray[dataIndex]);
      } else {
        newRow.push(""); // 如果数据不足，用空字符串填充
      }
    }
    resultArray.push(newRow);
  }

  var result = "";
  for (var i = 0; i < resultArray.length; i++) {
    result += resultArray[i].join(delimiter) + "\n"; // 拼接每一行的数据
  }

  return result;
}

// 示例用法
var row = "1,2,3,4,5,6,7,8,9,10,11,12";
var columnCount = 3;
var delimiter = ",";
var result = splitRowByColumnCount(row, columnCount, delimiter);
console.log(result);