如何在javascript对象中分组和创建新属性？

let obj = {
  name: 'Alice',
  age: 25
};

// 添加新属性
obj.group = 'Developers';
obj.newProperty = 'New Value';

console.log(obj);
// 输出: { name: 'Alice', age: 25, group: 'Developers', newProperty: 'New Value' }

let obj = {
  name: 'Alice',
  age: 25
};

// 使用计算属性名添加新属性
obj['group'] = 'Developers';
obj['newProperty' + 1] = 'Another Value';

console.log(obj);
// 输出: { name: 'Alice', age: 25, group: 'Developers', newProperty1: 'Another Value' }

let obj1 = {
  name: 'Alice',
  age: 25
};

let obj2 = {
  group: 'Developers',
  newProperty: 'New Value'
};

let newObj = Object.assign({}, obj1, obj2);

console.log(newObj);
// 输出: { name: 'Alice', age: 25, group: 'Developers', newProperty: 'New Value' }

let obj1 = {
  name: 'Alice',
  age: 25
};

let obj2 = {
  group: 'Developers',
  newProperty: 'New Value'
};

let newObj = { ...obj1, ...obj2 };

console.log(newObj);
// 输出: { name: 'Alice', age: 25, group: 'Developers', newProperty: 'New Value' }

let obj1 = {
  name: 'Alice',
  age: 25
};

let obj2 = {
  age: 30, // 覆盖age属性
  group: 'Developers'
};

let newObj = { ...obj1, ...obj2 };

// 检查并避免覆盖
if (!newObj.hasOwnProperty('age')) {
  newObj.age = obj2.age;
}

console.log(newObj);
// 输出: { name: 'Alice', age: 25, group: 'Developers' }

let obj1 = {
  name: 'Alice',
  age: 25
};

let obj2 = {
  group: 'Developers',
  newProperty: 'New Value'
};

let newObj = {};

for (let key in obj1) {
  if (obj1.hasOwnProperty(key)) {
    newObj[key] = obj1[key];
  }
}

for (let key in obj2) {
  if (obj2.hasOwnProperty(key)) {
    newObj[key] = obj2[key];
  }
}

console.log(newObj);
// 输出: { name: 'Alice', age: 25, group: 'Developers', newProperty: 'New Value' }