How to parse a json file without a key?

[dennis.kim]

Hi,
the file i want to parse is as follows.

[
3,
"aabfff",
{
"currentTime": "2022-03-22T14:21:17.416524",
"interval":10,
"status":"Accepted"
}
]

i would like to get each item by index if possible.
I don't know how to parse it.
In particular, I have no idea how to get <3, "aabfff"> without a Key value.
If you know how, please advise.

[jsulm]

@dennis-kim said in How to parse a json file without a key?:

I have no idea how to get <3, "aabfff"> without a Key value

Using index. You have an array, so use index.
Read your JSON into QJsonDocument using https://doc.qt.io/qt-5/qjsondocument.html#fromJson
Then convert QJsonDocument to array using https://doc.qt.io/qt-5/qjsondocument.html#array
Then access array elements using https://doc.qt.io/qt-5/qjsonarray.html#operator-5b-5d

[artwaw]

@dennis-kim the top level is QJsonArray, you can just iterate over it, can't you?

PS. @jsulm was faster ;)

[Pl45m4]

@dennis-kim

The text representation of JSON encloses arrays in square brackets ([ ... ]) and objects in curly brackets ({ ... }). Entries in arrays and objects are separated by commas. The separator between keys and values in an object is a colon (:).

(https://doc.qt.io/qt-5/json.html)

So, what you have here is a JSON, which contains an array of ints, strings and json objects...

Edit:
LOL, didn't refresh my page... thought, I'd be the first :) sry @jsulm @artwaw :D

[dennis.kim]

@jsulm

thanks a lot...
Solved this issue.

    **QByteArray json_bytes = json_msg->toLocal8Bit();
    QJsonDocument doc = QJsonDocument::fromJson(json_bytes, &err);
    QJsonArray jsonArray = doc.array();
    QJsonValue abc = jsonArray[0];
    qDebug() << "abc:" << abc << "type : " << abc.type();

    abc = jsonArray[1];
    qDebug() << "abc1:" << abc << "type : " << abc.type();

    abc = jsonArray[2];
    qDebug() << "abc2:" << abc << "type : " << abc.type();

    for (auto it = jsonArray.constBegin(); it != jsonArray.constEnd(); ++it)
    {
        const QJsonValue &val = *it;

        QJsonObject o = val.toObject();
        for (auto oIt = o.constBegin(); oIt != o.constEnd(); ++oIt)
        {
            qDebug() << "Key:" << oIt.key() << ", Value:" << oIt.value().toString();
        }
    }**