Deleting all values from a QMap

Question

I have a QMap consist of pointers to class objects, allocated using `new`. I need to delete all these pointers. What is the proper way of doing this with QMap ? I can do it this way: ``` QList allVals = map.values(); for (QList::iterator it = allVals.begin(), endIt = allVals.end(); it != endIt; ++it) { delete *it; } ``` But is there a better way of doing the same ?

Accepted Answer

The best way to do this is to use qDeleteAll(...):

```
qDeleteAll( map );  //  deletes all the values stored in "map"
map.clear();        //  removes all items from the map
```

`qDeleteAll(...)` can be used on all of Qt's containers. This way you don't need to worry about a loop nor worry about deleting items individually.

Deleting all values from a QMap

Solution

Problem