js结构体

const person = {
    name: "Alice",
    age: 25,
    gender: "female"
};

function Person(name, age, gender) {
    this.name = name;
    this.age = age;
    this.gender = gender;
}

const alice = new Person("Alice", 25, "female");

if (person.hasOwnProperty('name')) {
    console.log(person.name);
} else {
    console.log('属性不存在');
}

function setAge(person, age) {
    if (typeof age === 'number') {
        person.age = age;
    } else {
        console.error('年龄必须是数字');
    }
}

// 定义一个 Person 对象
const person = {
    name: "Alice",
    age: 25,
    gender: "female",
    sayHello: function() {
        console.log(`Hello, my name is ${this.name}`);
    }
};

// 访问属性和方法
console.log(person.name); // 输出: Alice
person.sayHello(); // 输出: Hello, my name is Alice

// 修改属性
person.age = 26;
console.log(person.age); // 输出: 26

// 检查属性是否存在
if (person.hasOwnProperty('name')) {
    console.log('属性存在');
} else {
    console.log('属性不存在');
}