js+对象+update

function deepCopy(obj) {
    return JSON.parse(JSON.stringify(obj));
}

let original = { a: 1, b: { c: 2 } };
let copy = deepCopy(original);
copy.b.c = 3;
console.log(original.b.c); // 输出: 2

function safeUpdate(obj, path, value) {
    let current = obj;
    for (let i = 0; i < path.length - 1; i++) {
        if (!current[path[i]]) current[path[i]] = {};
        current = current[path[i]];
    }
    current[path[path.length - 1]] = value;
}

let user = { profile: { name: 'Alice' } };
safeUpdate(user, ['profile', 'age'], 26);
console.log(user); // 输出: { profile: { name: 'Alice', age: 26 } }

for (let key in obj) {
    if (obj.hasOwnProperty(key)) {
        console.log(key, obj[key]);
    }
}