CODEWITHSUNDEEP
javascriptnode.js
prk
prk

Reputation: 3809

NodeJS Count how many objects in array?

How would I count how many objects there are inside an array?

The array looking like:

[ {id: 1}, {id: 2}, ...]

I assume I could use count() if it was PHP, but what about NodeJS/Javascript?

Edit:

asd

if (offer.items_to_receive.length > 0) { 
    console.log("items: " + offer.items_to_receive.length);
    for(var i = 0; i < offer.items_to_receive.length; i++) {
        usersInRound.push(offer.steamid_other);
    }
}

logData('Accepted trade offer from ' + offer.steamid_other + '. (tradeofferid: ' + offer.tradeofferid + ')\nWorth ' + offer.items_to_receive.length + ' tickets. ');

How come it can read the "worth X tickets", but not the other part?

Upvotes: 13

Views: 63928

Answers (4)

Prakash
Prakash

Reputation: 1

a.arr.length

.length is not working while used in express it says deprecated

Error: express deprecated res.send(status): Use res.sendStatus(status) instead

Upvotes: 0

Oleksandr T.
Oleksandr T.

Reputation: 77482

Use .length

var data = [{
    id: 1
}, {
    id: 2
}];

console.log(data.length);

Update, in your edit I see that

offer.items_to_receive is undefined, ensure that object offer has property items_to_receive (should be array);

Upvotes: 28

Zuber Surya
Zuber Surya

Reputation: 869

list = //YOUR OBJECT DATA

count= Object.keys(list).length;

Object.keys() gives the count of keys

That should give proper count

Upvotes: 10

Sheharyar
Sheharyar

Reputation: 75770

I think your question should be How to get Array Size in Javascript?

Answer: Use the length method.

Examples:

[1,2,3].length
// => 3

var a = { num: 1, obj: {}, arr: [{}, 3, "asd", {q: 3}, 1] }
a.arr.length
// => 5

Upvotes: 1

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