Can I check values with "|" in expression?

It wouldn't go in the condition, it would go in the action.

Something like:

for each in array

-> object set opacity to (curx="r"|curx=1)=1 ?100 :0

Well, ok, but I need it to be a condition, because then I need to add other actions.

These are one of the situations that made me make the Set plugin.

It allows you to make ORs in very elegant way like this

You can also do it with TR_System plugin which is free, but lacks of other Set plugin feature and has many other unrelated things built in.

Thanks, but i'd just like to know how to do that condition, cause there is a way right?

korbaach's post does what you want.