按javascript中的字典列表分组

const data = [
  { name: 'Alice', age: 25 },
  { name: 'Bob', age: 30 },
  { name: 'Charlie', age: 25 },
  { name: 'Dave', age: 30 }
];

const groupedData = data.reduce((acc, obj) => {
  const key = obj.age; // 以age属性作为分组的键
  if (!acc[key]) {
    acc[key] = [];
  }
  acc[key].push(obj);
  return acc;
}, {});

console.log(groupedData);

{
  25: [
    { name: 'Alice', age: 25 },
    { name: 'Charlie', age: 25 }
  ],
  30: [
    { name: 'Bob', age: 30 },
    { name: 'Dave', age: 30 }
  ]
}