Multidataset, multidimensional array of objects in JS and in Node

Question

I am stuck with the problem. Is there a difference between arrays in examples below:

This one in React:

const multiDataSet = [
    {
        columns: [
            {title: "Last name", width: {wpx: 150}}
        ],
        data: []
    }
];

Same time in NodeJS server side:

const tmp = [
                    {
                        user:[]
                    }
            ];

I am trying to do in a cycle on NodeJs server side:

tmp.[i].user.push(somevar);

It's saying that [ is unexpected. But same time in React I can do the below and it's working:

multiDataSet.[0].data.push(somevar);

What can be wrong here?

Answer 1

There should not be a . before accessing array item using index in any of the following cases.

Change

tmp.[i].user.push(somevar);

to

tmp[i].user.push(somevar);

and Change

multiDataSet.[0].data.push(somevar);

to

multiDataSet[0].data.push(somevar);