如何将对象中的嵌套数组转换为逗号分隔的连接字符串值？

function convertNestedArrayToString(obj) {
  for (let key in obj) {
    if (Array.isArray(obj[key])) {
      obj[key] = obj[key].join(',');
    }
  }
  return obj;
}

// 示例对象
let obj = {
  name: 'John',
  age: 30,
  hobbies: ['reading', 'music', 'sports'],
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA'
  }
};

// 转换对象中的嵌套数组为逗号分隔的字符串
let result = convertNestedArrayToString(obj);

console.log(result);

{
  name: 'John',
  age: 30,
  hobbies: 'reading,music,sports',
  address: {
    street: '123 Main St',
    city: 'New York',
    country: 'USA'
  }
}