deleting a QMap after clear()

[nemd]

Hi,

is it safe to call delete directly after having called clear() on a QMap.
e.g. :

QMap *myMap = new QMap<QString,MyClass>
myMap->insert("one", myClass);
....
myMap->clear();
delete myMap;

[mrjj]

hi and welcome to the forums
yes it should be.
The clear happens in place and will delete the internal structures.

[dheerendra]

If your value objects are pointer type, you should delete them as well.

will delete the internal structures.
@mrjj curious about above statement. What do you mean by it ?

[mrjj]

@dheerendra
I simply meant that calling clear deletes QMaps internal structures holding the items it manages.
But good call noting if MyClass is a pointer , clear() will not be delete the object being pointed to, but only the pointer itself.

[Christian Ehrlicher]

And to complete it all together - there is no need to create a QMap on the heap at all in most of the cases.