How to push object into array by checking it is undefined or not in javascript

Question

I want to push object into array if it is defined else push '0'

I am sending count object into count array.

var emptyObj = { 'cnt': 0 };

countArr.push(matchCdnCnt !== 'undefined' ? matchCdnCnt : emptyObj.cnt);
countArr.push(matchInvCnt !== 'undefined' ? matchInvCnt : emptyObj.cnt);
countArr.push(mismatchInvCnt !== 'undefined' ? mismatchInvCnt : emptyObj.cnt);
countArr.push(mismatchCdnCnt !== 'undefined' ? mismatchCdnCnt : emptyObj.cnt);
countArr.push(onHoldInvCnt !== 'undefined' ? onHoldInvCnt : emptyObj.cnt);
countArr.push(onHoldCdnCnt !== 'undefined' ? onHoldCdnCnt : emptyObj.cnt);
countArr.push(availgstnInvCnt !== 'undefined' ? availgstnInvCnt : emptyObj.cnt);
countArr.push(availgstnCdnCnt !== 'undefined' ? availgstnCdnCnt : emptyObj.cnt);
countArr.push(pendingInvCnt !== 'undefined' ? pendingInvCnt : emptyObj.cnt);
countArr.push(pendingCdnCnt !== 'undefined' ? pendingCdnCnt : emptyObj.cnt);

I wants to push count object or 0.

'undefined' and undefined are not the same.

Jonas Wilms
– Jonas Wilms

2019-08-27 09:01:45 +00:00
Commented Aug 27, 2019 at 9:01 — Jonas Wilms
– Jonas Wilms, Commented Aug 27, 2019 at 9:01
you can use countArr.push(matchCdnCnt || emptyObj.cnt)

arizafar
– arizafar

2019-08-27 09:06:58 +00:00
Commented Aug 27, 2019 at 9:06 — arizafar
– arizafar, Commented Aug 27, 2019 at 9:06
@AZ_ And what if value is some other falsy value ?

whatamidoingwithmylife
– whatamidoingwithmylife

2019-08-27 09:19:25 +00:00
Commented Aug 27, 2019 at 9:19 — whatamidoingwithmylife
– whatamidoingwithmylife, Commented Aug 27, 2019 at 9:19
ahh missed that, thanks @prsvr. will have to use ternary.

arizafar
– arizafar

2019-08-27 09:21:20 +00:00
Commented Aug 27, 2019 at 9:21 — arizafar
– arizafar, Commented Aug 27, 2019 at 9:21

Neel Rathod · Accepted Answer · 2019-08-27 09:14:06Z

1

You achieve this with only one condition if(cnt), Check below snippet, I take an array of objects to check all cases In which It pushes 0 into an array if cnt is undefined/''/null else it's push value of cnt.

const array = [];
const myObjects = [{ cnt: 3 }, { cnt: 4 }, { cnt: 5 }, { cnt: undefined }, { cnt: '' }, { cnt: null }];

myObjects.forEach((m) => {
  const { cnt } = m;
  const pushElement = cnt || 0;
  array.push(pushElement);
});

console.log(array);

answered Aug 27, 2019 at 9:14

Neel Rathod

2,11115 silver badges29 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Ricardo Rocha · Accepted Answer · 2019-08-27 09:03:54Z

0

You can do something like this:

let emptyObj = { 'cnt': 3 };
let undefinedObj;

let array = [
  emptyObj && emptyObj.cnt ? emptyObj.cnt : 0,
  undefinedObj ? undefinedObj: 0
];

console.log(array)

The emptyObj && emptyObj.cnt ? emptyObj.cnt : 0 doesn't only validates "undefined" objects but also nulls objects.

answered Aug 27, 2019 at 9:03

Ricardo Rocha

16.5k24 gold badges86 silver badges142 bronze badges

Comments

Nagnath Mungade · Accepted Answer · 2019-08-27 12:49:21Z

0

I found another solution where it will assign count 0 if required count variable return undefined else cnt value as below

    countArr.push(typeof matchCdnCnt!= 'undefined'? matchCdnCnt.cnt: emptyObj.cnt);
    countArr.push(typeof matchInvCnt!= 'undefined'? matchInvCnt.cnt: emptyObj.cnt);

I have to do so much after this result.

answered Aug 27, 2019 at 12:49

Nagnath Mungade

1,00911 silver badges12 bronze badges

Collectives™ on Stack Overflow

How to push object into array by checking it is undefined or not in javascript

3 Answers 3

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related