[JASS] 2 questions

[RedFlash]

1. How can I set a trigger that it skips a variable if its in used?
2. Kinda the same as number one but how can I set unit variables to not picked unit that are already picked by variables in the same trigger

 

[Dr Super Good]

1. using a conditional statement to check if the variable has a value or not. If it does have a value the code is run else nothing happens and it continues with the script.
2. Again conditions that compair values of variables and run code under the required conditions.