如何合并JSON对象数组中的数组？

// 原始的JSON对象数组
const jsonArr = [
  {
    id: 1,
    name: 'John',
    hobbies: ['reading', 'music']
  },
  {
    id: 2,
    name: 'Alice',
    hobbies: ['swimming', 'photography']
  },
  {
    id: 3,
    name: 'Bob',
    hobbies: ['reading', 'gaming']
  }
];

// 合并数组
const mergedArray = [];
jsonArr.forEach(obj => {
  mergedArray.push(...obj.hobbies);
});

// 数组去重
const uniqueArray = Array.from(new Set(mergedArray));

// 添加合并后的数组到原始JSON对象数组
jsonArr.forEach(obj => {
  obj.mergedHobbies = uniqueArray;
});

console.log(jsonArr);

[
  {
    id: 1,
    name: 'John',
    hobbies: ['reading', 'music'],
    mergedHobbies: ['reading', 'music', 'swimming', 'photography', 'gaming']
  },
  {
    id: 2,
    name: 'Alice',
    hobbies: ['swimming', 'photography'],
    mergedHobbies: ['reading', 'music', 'swimming', 'photography', 'gaming']
  },
  {
    id: 3,
    name: 'Bob',
    hobbies: ['reading', 'gaming'],
    mergedHobbies: ['reading', 'music', 'swimming', 'photography', 'gaming']
  }
]