NodeJS计算数组中有多少个对象？

Question

我如何计算数组中有多少个对象？

该数组看起来像:

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

我假设我可以使用count(),如果它是PHP,但NodeJS/Javascript怎么样？

编辑:

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. ');

怎么会看到"值得X门票",而不是其他部分？

Answer 1

使用 .length

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

console.log(data.length);

更新,在您的编辑中我看到了

offer.items_to_receive是undefined,确保对象offer具有属性items_to_receive(应该是数组);

Answer 2

list = //YOUR OBJECT DATA

count= Object.keys(list).length;

Object.keys() gives the count of keys

那应该给出适当的计数