[JASS] Get amount of trees

[MikauSchekzen]

It wasn't possible with triggers, so I decided to learn JASS. But I can't find it here either. How can I get the number of trees in the map as an integer?

 

[donut3.5]

It's very possible in GUI.
Pick every destructable in entire map and do actions
Set TempIntegerVariable to TempIntegerVariable + 1
--donut3.5--

 

[MikauSchekzen]

I haven't thought of it that way. Thank you.