How to iterate map and assign value to field in lightning component?

Question

I have list of account Ids in an array and list of accounts in array.

I need to find the account Ids from the account list and want to change the status field.

var accId=[]; //holding accIds
var accObjectMap = [];
var accList=component.get("v.listOfacc");
console.log('sa##'+accList);
for(var i=0; i<accList.length; i++) {
    console.log('acceee##'+accList[i].Name);
    var temp = { "key": accList[i].Id, "list": [accList[i]] };
    console.log('temp##'+temp);
    accObjectMap.push(temp);
 }

 for(var j=0;j<accId.length;j++){

     console.log('accId##'+accId[j]);
 }

Eg : My accId have 2 account ids .My accList have 6 values. I want to find that 2 values from acclist and assign the status as "New".

Answer 1

You can use Array.prototype.filter, Array.prototype.indexOf, and Array.prototype.forEach:

var accIds = []; // Has account Ids
var accountList = component.get("v.listOfacc");
var accountsToUpdate = accountList.filter(item => accIds.indexOf(item.Id) > -1);
accountsToUpdate.forEach(item => item.Status__c = "New");

filter accepts a method that returns true/false for each item and returns an Array for each item where the value is true. indexOf finds a matching value in an Array or returns -1. forEach takes each item in an Array and passes it to a method; we use this to update the status of each account.