从不同的JSON数组中删除重复项

function removeDuplicatesFromJSONArrays(jsonArrays) {
  // 合并所有的JSON数组
  const mergedArray = [].concat(...jsonArrays);

  // 使用哈希表记录每个元素的出现次数
  const countMap = {};
  mergedArray.forEach((element) => {
    const key = JSON.stringify(element);
    countMap[key] = (countMap[key] || 0) + 1;
  });

  // 删除重复项
  const uniqueArray = mergedArray.filter((element) => {
    const key = JSON.stringify(element);
    return countMap[key] === 1;
  });

  return uniqueArray;
}

// 示例用法
const jsonArrays = [
  [{ "id": 1, "name": "John" }, { "id": 2, "name": "Jane" }],
  [{ "id": 2, "name": "Jane" }, { "id": 3, "name": "Bob" }],
  [{ "id": 4, "name": "Alice" }, { "id": 5, "name": "John" }]
];

const uniqueArray = removeDuplicatesFromJSONArrays(jsonArrays);
console.log(uniqueArray);