删除所有重复出现的JSON对象数组

function removeDuplicates(arr) {
  const unique = new Set(arr.map(JSON.stringify)).map(JSON.parse);
  return Array.from(unique);
}

const jsonArray = [
  { id: 1, name: 'Alice' },
  { id: 2, name: 'Bob' },
  { id: 1, name: 'Alice' },
  { id: 3, name: 'Charlie' }
];

const uniqueArray = removeDuplicates(jsonArray);
console.log(uniqueArray);

const MongoClient = require('mongodb').MongoClient;
const uri = "your_mongodb_connection_string";
const client = new MongoClient(uri, { useNewUrlParser: true, useUnifiedTopology: true });

async function removeDuplicatesFromDB() {
  try {
    await client.connect();
    const database = client.db('your_database_name');
    const collection = database.collection('your_collection_name');

    const uniqueDocuments = await collection.aggregate([
      { $group: { _id: "$_id", ...Object.keys(yourJsonSchema).reduce((acc, key) => ({ ...acc, [key]: `$${key}` }), {}) } },
      { $project: { _id: 0, ...Object.keys(yourJsonSchema) } }
    ]).toArray();

    return uniqueDocuments;
  } finally {
    await client.close();
  }
}

removeDuplicatesFromDB().then(console.log).catch(console.error);