The value in the condition without a variable

I hope to get the result and assign it a new value using such a short entry. I want the result and value to be without creating a variable. How should I do it right?

for example:

let clientOnline =[{num:4},{num:1},{num:3}];
let myValue =clientOnline.find(cli=>cli['num']===4)
if(myValue) myValue['num'] = 0;

What I would like:

let clientOnline =[{num:4},{num:1},{num:3}]
if(clientOnline.find(cli=>cli['num']===4)) this['num']=4

I have more experience in languages where variables need to be freed. I know that JS does it on its own. But I really want to control it. I hope it’s possible.

>Solution :

You can find the element in the array and update it in one go

clientOnline.map(c => c.num === 4 ? ({ num: "new_value" }) : c)

Update (addressing your comment)

If you have multiple elements with the same value then you can simply use a for loop and stop whenever you need.

for(let i = 0; i < clientOnline.length; i++) {
  if(clientOnline[i].num === 4) {
    clientOnline[i].num = "new_value"
    break
  }
}