Dmitry221060

var file = fs.createReadStream("somefilethatnotexist.html");
file.on("error", (err) => {
    console.log('I got error!');
});

server.on("error", (err) => {
    console.log('I got error!');
});

myCollection.aggregate([
    {'$project': {
        "stat": 1,
        "userID": 1,
        "statParsed": {"$objectToArray": "$stat"}
    }},
    {"$unwind": "$statParsed"},
    {"$group": {
        "_id": {
            "userID": "$userID", 
            "stat": "$stat"
        }, 
        "sum": {"$sum": "$statParsed.v"}
    }}
]).sort({"sum": -1}).toArray((err, data) => {
    ...
});