Remove outer Array of Objects in JavaScript

Question

I’ve got an JavaScript Array of Objects. These Objects have a unique identifier as a String. Since there is no need to have them in an array, how do I get rid of the outer array?

When trying to pop, (un)shift, etc. I’m always losing either UniqueStringA or UniqueStringB

I added a jsbin link here: https://jsbin.com/sulozeyelo/edit?js,console

What I got

const arrObj = [
 {
 "UniqueStringA": {
 "abc": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "def": [],
 "efg": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "xyz": []
 }
 },
 {
 "UniqueStringB": {
 "abc": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "def": [],
 "efg": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "xyz": []
 }
 }
];

Result should be like:

const obj = {
 "UniqueStringA": {
 "abc": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "def": [],
 "efg": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "xyz": []
 },
 "UniqueStringB": {
 "abc": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "def": [],
 "efg": [
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 },
 {
 "PropPair": {
 "a": "c",
 "b": "d"
 }
 }
 ],
 "xyz": []
 }
};

• jonny: let obj = arr[0] ... ???
• Hassan Imam: You can access through index or pop out the object using array#pop.
• Nurbol Alpysbayev: I've upvoted just for how this question is clear.

Answer 1

You can use Object.assign() and spread operator.

const arrObj = [
 {
 "uniqueStringA": {
 "abc": [{
 "propPair": {
 "A": "Hello",
 "B": "World"
 }
 }]
 }
 },
 {
 "uniqueStringB": {
 "abc": [{
 "propPair": {
 "A": "Hello",
 "B": "World"
 }
 }]
 }
 }];
const obj = Object.assign({}, ...arrObj );
console.log(obj);

• Kalaschnik: I updated my code. I’m losing uniqueStringA when doing you method