In my knowledge you can't check if he has or not any item. You can only check if he has a specific item or item of type/class/level...
As for particular slots, that is easy... there is the trigger that checks if a hero has ITEM (specific, of type, of class, of level) in slot 1/2/3/4/5/6/ANY INTEGER.
You could try, tough:
Check if number of charges remaining in item hold by hero in slot X is equal with 0.
Yet i think that items like, with no charges (example some blades of attack) because they don't have any charges may have the charges remaining number = 0... and would mess up the trigger.
I'm on a page about incorrect corrections, and spent the better part of like two hours trying to get someone to understand that -5^2 = -25, not 25, and then that post had comments get reposted because that group is self sustaining, and that person was in turn trying to explain what I just explained to them. And I'm taking that as a victory
I will be AFK for a couple of days you guys hold down the fort while I am gone. I will be checking in on my phone but that will severly limit me. Be back saturday!
I just got to watch the video because even though I was there I was trying to work out tech problems with the chat since I was the social media guy so I was distracted but check it out guys the video is super fucking great!