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add object from array into a Map() Javascript/Node

Is there any way to add an array of objects into a Map() ?
I want to add a username from the array each time i call the function add().

Quick example:

let localHashMap = new Map();
let arr = ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff']; // etc

function add(arrayNumber) {
    addToMap(arr[arrayNumber]);
}

function addToMap(username) {
    localHashMap.set('users', { 'user': username }); // <-- add? put? set?

    let obj;
    if (localHashMap.has('users')) {
        obj = localHashMap.get('users');
    }
    //Then i will use a loop to get the results 
    
    console.log(obj);

    //Output example
    //{ user: fff }
    //{ user: ddd }
    //{ user: aaa }
    //etc
}

Thanks in advance!

I try to figure it out but no luck at all..

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    I figure it out thanks to @Barman with a little bit of modification because i want them inside the Map() as Object.

    if (localHasMap.has('users')) {
   users = localHasMap.get('users');
   } else {
   users = new Map();
   users.set('user', username);
   }
localHasMap.set('users', Object.fromEntries(users));

    Thank you all.


  2. 0

    Fetch the array from the Map; if it doesn’t exist, initialize it to an empty array. Then push the new item onto the array.

    let localHashMap = new Map();
let arr = ['aaa', 'bbb', 'ccc', 'ddd', 'eee', 'fff']; // etc

function add(arrayNumber) {
  addToMap(arr[arrayNumber]);
}

function addToMap(username) {
  let users;
  if (localHashMap.has('users')) {
    users = localHashMap.get('users');
  } else {
    users = [];
    localHashMap.set('users', users);
  }
  users.push({user: username});

  console.log(users);
}

add(3);
add(5);
add(2);
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