ARTS_20200520

public static int singleNumber(int[] nums) {
    int result = 0;
    int len = nums.length;
    for (int i = 0; i < len; i++) {
      result = result ^ nums[i];
    }
    return result;
  }

function countBytes(beginTime, endTime) {
    var total = 0;
    var dayArray = new Array();
    db.test.aggregate([
        {
            $match: {
                "incomingTime": {$gte: new Date(beginTime), $lt: new Date(endTime)},
                'externalFilling.state': 'Finished'
            }
        },
        {
            $project: {
                day: {$dateToString: {format: "%Y-%m-%d", date: "$incomingTime"}},
                bytes: "$data.final.typeInfoBytes",
                _id: 0
            }
        },
        {
            $group: {
                _id: {day: "$day"},
                bytes: {$sum: "$bytes"}
            }
        },
        {
            $project: {
                day: "$_id.day",
                bytes: "$bytes",
                _id: 0
            }
        },
        {$sort: {"day": 1}}
    ]).map(function (detail) {
        total += detail.bytes;
        dayArray.push(detail);
    });
    return {"total": total, "detail": dayArray};
}
countBytes(beginTime, endTime);