将重复的对象从一个数组推送到它们自己的数组中

function pushDuplicatesToArrays(arr) {
  var dict = {};
  var result = [];

  for (var i = 0; i < arr.length; i++) {
    var obj = arr[i];
    var key = JSON.stringify(obj);

    if (dict[key]) {
      dict[key].push(obj);
    } else {
      dict[key] = [obj];
    }
  }

  for (var key in dict) {
    result.push(dict[key]);
  }

  return result;
}

// 示例用法
var originalArray = [
  { id: 1, name: 'A' },
  { id: 2, name: 'B' },
  { id: 1, name: 'A' },
  { id: 3, name: 'C' },
  { id: 2, name: 'B' }
];

var newArray = pushDuplicatesToArrays(originalArray);
console.log(newArray);

[
  [
    { id: 1, name: 'A' },
    { id: 1, name: 'A' }
  ],
  [
    { id: 2, name: 'B' },
    { id: 2, name: 'B' }
  ],
  [
    { id: 3, name: 'C' }
  ]
]