根据相同的id合并数组内的数组对象

function mergeArrayObjectsById(arr) {
  const tempObj = {};
  
  // 遍历数组，将具有相同id的数组对象放入临时对象中
  arr.forEach(obj => {
    if (tempObj[obj.id]) {
      tempObj[obj.id].push(obj);
    } else {
      tempObj[obj.id] = [obj];
    }
  });
  
  // 将临时对象中的值转换为数组
  const mergedArr = Object.values(tempObj);
  
  // 返回处理后的数组对象
  return mergedArr;
}

// 示例数据
const arr = [
  { id: 1, name: 'obj1' },
  { id: 2, name: 'obj2' },
  { id: 1, name: 'obj3' },
  { id: 3, name: 'obj4' },
  { id: 2, name: 'obj5' }
];

// 调用函数进行合并
const mergedArray = mergeArrayObjectsById(arr);
console.log(mergedArray);

[
  [
    { id: 1, name: 'obj1' },
    { id: 1, name: 'obj3' }
  ],
  [
    { id: 2, name: 'obj2' },
    { id: 2, name: 'obj5' }
  ],
  [
    { id: 3, name: 'obj4' }
  ]
]