javascript - 如何避免 JavaScript 中的 JSON 指针不使用 json.stringify？

Question

我想将员工复制到新员工，而不是指向老员工。
我尝试使用：

newEmployees.assign([{}].employees); <br>
newEmployees = [{...employees}]; <br>

他们指着一位老员工。

const employees = [
    {
        "id": "1001",
        "firstname": "Luke",
        "lastname": "Skywalker",
        "company": "Walt Disney",
        "salary": "40000"
    },
    {
        "id": "1002",
        "firstname": "Tony",
        "lastname": "Stark",
        "company": "Marvel",
        "salary": "1000000"
    },
    {
        "id": "1003",
        "firstname": "Somchai",
        "lastname": "Jaidee",
        "company": "Love2work",
        "salary": "20000"
    },
    {
        "id": "1004",
        "firstname": "Monkey D",
        "lastname": "Luffee",
        "company": "One Piece",
        "salary": "9000000"
    }
];

let newEmployees = [{}];
newEmployees[0] = employees[3]; // assign
employees[3]['firstname'] = 'Arhus'; // change old employees
console.log(newEmployees); //firstname: 'Arhus' - shows employees content

太感谢了。

标签： javascriptjsonpointers

Answer 1

只需在分配这样的值时使用传播

const employees = [
    {
        "id": "1001",
        "firstname": "Luke",
        "lastname": "Skywalker",
        "company": "Walt Disney",
        "salary": "40000"
    },
    {
        "id": "1002",
        "firstname": "Tony",
        "lastname": "Stark",
        "company": "Marvel",
        "salary": "1000000"
    },
    {
        "id": "1003",
        "firstname": "Somchai",
        "lastname": "Jaidee",
        "company": "Love2work",
        "salary": "20000"
    },
    {
        "id": "1004",
        "firstname": "Monkey D",
        "lastname": "Luffee",
        "company": "One Piece",
        "salary": "9000000"
    }
];

let newEmployees = [{}];
newEmployees[0] = { ...employees[3] };
employees[3]['firstname'] = 'Arhus'; // change employee
console.log(newEmployees); //firstname is still Monkey D