js数据类型object

// 创建一个普通对象
let person = {
    firstName: "John",
    lastName: "Doe",
    age: 30,
    fullName: function() {
        return this.firstName + " " + this.lastName;
    }
};

console.log(person.fullName()); // 输出: John Doe

// 动态添加属性
person.email = "john.doe@example.com";
console.log(person.email); // 输出: john.doe@example.com

// 修改属性
person.age = person.age + 1;
console.log(person.age); // 输出: 31

// 删除属性
delete person.email;
console.log(person.email); // 输出: undefined

let obj = { key1: 'value1' };

// 使用 in 操作符
console.log('key1' in obj); // 输出: true

// 使用 hasOwnProperty 方法
console.log(obj.hasOwnProperty('key1')); // 输出: true

let obj = { a: 1, b: 2, c: 3 };

for (let prop in obj) {
    console.log(`obj.${prop} = ${obj[prop]}`);
}
// 输出:
// obj.a = 1
// obj.b = 2
// obj.c = 3

function deepClone(obj) {
    if (obj === null || typeof obj !== 'object') {
        return obj;
    }
    let clone = Array.isArray(obj) ? [] : {};
    for (let key in obj) {
        if (obj.hasOwnProperty(key)) {
            clone[key] = deepClone(obj[key]);
        }
    }
    return clone;
}

let original = { a: 1, b: { c: 2 } };
let cloned = deepClone(original);
console.log(cloned); // 输出: { a: 1, b: { c: 2 } }