How put objects into groups and let them collide?

[The Thinker]

In my alley cat game
I have many objects (heart1,heart2 heart3,....) they are cloned but they have the same behaviour and when arrow objects (arrow1,arrow2,arroow3....) collide with them, they have to be destroyed.
Is it possible to make groups of these objects to save time.

Example: when arrowgroup collides with heartgroup destroy heartgroup

[Joshtek]

You can use qualifiers.

[The Thinker]

Pls can you explain me where I can find qualifiers and how to use them?

Thanks

[Joshtek]

To quote the help documentation:

A qualifier is a small icon and a name, that can be applied to several objects. For example, the "Bad" qualifier can be applied to all of your enemies in a game, even if they are different objects. They all can have the "Bad" qualifier. Under the event editor, the qualifier will appear in the list of objects. You can use the qualifier as you would do for any object. You now understand that it simplifies a lot programming the same event for all the baddies : instead of entering the action or condition for each of the bad guys, you simple use the qualifier "Bad" and everything is done in one line.

To attribute a qualifier to an object or multiple objects, just select the objects and go into their properties. Under the Events tab is the Qualifier property. Select this and click edit, then you can select the qualifiers and click add.

Note: Object qualifiers are only accessible through the regular event editor (and so can't be used inside behaviours or global events).

[The Thinker]

Thank you very much, good explanation, qualifiers work very good!