遍历对象并仅选择特定字段

const obj = {
  name: 'John',
  age: 25,
  email: 'john@example.com',
  address: '123 Main St',
  phone: '123-456-7890'
};

const selectedFields = ['name', 'email']; // 需要选择的字段

const selectedObj = {}; // 存储选择的字段

for (const key in obj) {
  if (selectedFields.includes(key)) {
    selectedObj[key] = obj[key];
  }
}

console.log(selectedObj); // 输出 { name: 'John', email: 'john@example.com' }

obj = {
  'name': 'John',
  'age': 25,
  'email': 'john@example.com',
  'address': '123 Main St',
  'phone': '123-456-7890'
}

selected_fields = ['name', 'email']  # 需要选择的字段

selected_obj = {key: obj[key] for key in obj if key in selected_fields}

print(selected_obj)  # 输出 {'name': 'John', 'email': 'john@example.com'}