How to correctly calculate data in JSON?

Question

JavaScript

The bottom line is this, I have a json file:

[
    {
        "id": 0,
        "username": "Antony",
        "users": [
            {
                "id": 1,
                "like": 0
            },
            {
                "id": 2,
                "like": 1
            },
            {
                "id": 3,
                "like": 0
            },
            {
                "id": 4,
                "like": 1
            }
        ]
    },
    {
        "id": 1,
        "username": "Janet",
        "users": [
            {
                "id": 0,
                "like": 0
            },
            {
                "id": 2,
                "like": 1
            },
            {
                "id": 3,
                "like": 1
            },
            {
                "id": 4,
                "like": 1
            }
        ]
    },.......

I need to count how many "likes" each user has.
That is:
For example, we take the first id == 0.
We go through the objects, which can be very many and look:
If id == 0 and like == 1, add +1 to the array.
As a result, I should get:

usersWithLikes[user id] = number of likes in all objects

usersWithLikes[0] = 3
usersWithLikes[1] = 1
usersWithLikes[2] = 4
usersWithLikes[3] = 0

At the moment I think like this:
thumbsUp_data - json data

var usersWithLikes = thumbsUp_data.map(function(user_data){
                    return user_data.users.filter(function(value){
                        return value.like == 1;
                    }).length;
                });

But this is not correct, because it counts how many likes there are in the object.
Help me decide...

Answer 1

var usersWithLikes = {};

thumbsUp_data.forEach(function(data) {
    data.users.forEach(function(value) {
        // Если переменная пуста, положим туда 0
        usersWithLikes[value.id] = usersWithLikes[value.id] || 0;
        
        // Прибавим лайк
        usersWithLikes[value.id] += value.like;
    });
});

// На выходе получился хеш. Если надо именно массив, можно сделать так:
usersWithLikes = Array.prototype.slice.call(usersWithLikes, 0);

Answer 2

var likes = users.reduce(function (likes, user) {
  user.users.forEach(function (user) {
    likes[user.id] = likes[user.id]|| 0;
    likes[user.id] += user.like;
  });
  return likes;
}, {});
console.log(likes)

This is hardly what you need, but the idea should be clear