How can I mutate the json in the following way in javascript - node.js

Question

I have been asked in an interview to mutate the array of objects in such a way that the data appears in the following manner
[
{
"companyName": "ABC",
"members": [
{
"id": 13121212,
"firstName": "Ray",
"lastName": "Fernandis",
"points": 1800,
"position": 1
},
{
"id": 13131313,
"firstName": "Carrie",
"lastName": "Yoda",
"points": 1200,
"position": 2
}
]
}]
and the sample data was given below.
[
{
"communityName": "ABC",
"lastUpdateTimestamp": {
"date": {
"year": 2020,
"month": 10,
"day": 7
},
"time": {
"hour": 18,
"minute": 6,
"second": 5,
"nano": 536529000
}
},
"data": {
"listChannelsData": [
{
"channelId": 1234,
"channelName": "BCD",
"members": [
{
"id": 13121212,
"firstName": "Ray",
"lastName": "Fernandis",
"points": 1800,
"position": 1
}
]
}
]
}
},
{
"communityName": "DEF",
"lastUpdateTimestamp": {
"date": {
"year": 2020,
"month": 10,
"day": 7
},
"time": {
"hour": 18,
"minute": 6,
"second": 21,
"nano": 47894000
}
},
"data": {
"listChannelsData": [
{
"channelId": 3421,
"channelName": "GHI",
"members": [
{
"id": 13121212,
"firstName": "Nicholas",
"lastName": "Xin",
"points": 800,
"position": 2
},
{
"id": 13131313,
"firstName": "Carrie",
"lastName": "Yoda",
"points": 1000,
"position": 1
}
]
}
]
}
}
]
The agenda for me was to print the derived json from sample json and I could only figure out this much code which was a courtesy of stackoverflow
function dictionary(data) {
var map = {};
data.forEach(item => {
if (!Array.isArray(map[item.companyName])) {
map[item.companyName] = [item.data.listChannelsData];
} else {
map[item.communityName].push(item.data.listChannelsData);
}
});
return map;
}
console.log(dictionary(data));
But now when I try to pick up the data for the member using another foreach loop, I'm not able to access the data for members. Can anyone help me with the part where I can successfully access the member array and print the company name along side it

Answer 1

Try this code
var newArray = []
data.map((item, index) => {
newArray[index] = {companyName : item.communityName}
newArray[index].members = item.data.listChannelsData[0].members
})
data is the given data.