js对象的定义方法

let person = {
    name: "Alice",
    age: 25,
    greet: function() {
        console.log("Hello, my name is " + this.name);
    }
};

person.greet(); // 输出: Hello, my name is Alice

function Person(name, age) {
    this.name = name;
    this.age = age;
    this.greet = function() {
        console.log("Hello, my name is " + this.name);
    };
}

let person = new Person("Bob", 30);
person.greet(); // 输出: Hello, my name is Bob

let proto = {
    greet: function() {
        console.log("Hello, my name is " + this.name);
    }
};

let person = Object.create(proto);
person.name = "Charlie";
person.age = 28;
person.greet(); // 输出: Hello, my name is Charlie

class Person {
    constructor(name, age) {
        this.name = name;
        this.age = age;
    }

    greet() {
        console.log("Hello, my name is " + this.name);
    }
}

let person = new Person("David", 35);
person.greet(); // 输出: Hello, my name is David