I have a data structure defined as QMap, how may I sort this by value?

In QMap by default the items are always sorted by key. So, if you iterate over QMap like.

This is a demonstration of how to sort a QMap by value and not by key in qt c++. The values of the QMap were extracted and stored in a QList container object, then sorted through the qSort method. The keys were also stored in a QList for themselves.

After sorting is complete, the QMap object is then cleared and the Keys and values are then inserted back in the QMap container in ascending order by value. See solution below.

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