[Interest] Qt 5: Converting QJsonValue to QJsonArray

Stephen Chu stephen at ju-ju.com
Wed Aug 8 21:14:03 CEST 2012

I am trying out the new QJsonValue in Qt 5 and find myself wondering: 
Does converting a QJsonValue which is an array to a QJsonArray with 
QJsonValue::toArray() makes a copy of the underlying data?

Say I load a JSON file which is an object that contains an array with 
thousands of items using QJsonDocument:

     auto myObj = QJsonDocument::fromJson(jsonData).object();
     auto myArray = myObject["theArray"].toArray();

How efficient is the conversion? Does it make a deep copy of the data in 
the original object to the new array?


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