如何通过比较一个对象来更改另一个对象的键名？

function changeKey(obj1, obj2, oldKey, newKey) {
  if (obj2.hasOwnProperty(oldKey)) {
    obj2[newKey] = obj1[oldKey];
    delete obj1[oldKey];
  }
}

// 示例对象
var obj1 = { name: "Alice", age: 25, city: "Beijing" };
var obj2 = { name: "", age: 0, country: "China" };

// 比较并更改键名
changeKey(obj1, obj2, "name", "fullName");
changeKey(obj1, obj2, "age", "personAge");

console.log(obj1); // 输出: { city: "Beijing" }
console.log(obj2); // 输出: { fullName: "Alice", personAge: 25, country: "China" }