如何根据另一列将数据行分组到子数组中？

function groupByColumn(data, column) {
  var groupedData = {};

  for (var i = 0; i < data.length; i++) {
    var row = data[i];
    var key = row[column];

    if (!groupedData.hasOwnProperty(key)) {
      groupedData[key] = [];
    }

    groupedData[key].push(row);
  }

  return groupedData;
}

// 示例数据
var data = [
  { name: 'John', group: 'A' },
  { name: 'Jane', group: 'B' },
  { name: 'Tom', group: 'A' },
  { name: 'Emily', group: 'B' },
  { name: 'Mike', group: 'C' }
];

// 根据 group 列进行分组
var grouped = groupByColumn(data, 'group');

console.log(grouped);

{
  'A': [
    { name: 'John', group: 'A' },
    { name: 'Tom', group: 'A' }
  ],
  'B': [
    { name: 'Jane', group: 'B' },
    { name: 'Emily', group: 'B' }
  ],
  'C': [
    { name: 'Mike', group: 'C' }
  ]
}