Difference in code?

[Tricks]

Just curious, is there a difference between [] ExecVM and execVM? Thanks!

[kat]

[] ExecVM and execVM are the same, The brackets are there to define arguments or strings passed to the file being executed.

 

[true] ExecVM "path";

[Face]

Every time you use the execVM, spawn, or call commands, whatever value is immediately before the command is passed onto the execVM'ed/spawned/called code as the magic variable _this.

 

Quick demonstration:

//Scenario 1:
[0,1,2] execVM "script.sqf"; //If _this is used inside script.sqf, it would be equal to [0,1,2]. Useful if you want to pass multiple values to a script.

//Inside script.sqf:
diag_log str(_this); //This would produce output of "[0,1,2]" in your RPT log.


//Scenario 2:

1 execVM "script.sqf"; //If _this is used inside script.sqf, it would be equal to 1. Do this if you only want to pass a single value to a script.

//Inside script.sqf:
diag_log str(_this); //This would produce output of "1" in your RPT log.

If you use execVM with nothing before it, the value passed would be a nil (undefined) value for _this. If you missed a semicolon on the previous line, you'll be passing the result of previous line into the execVM statement, so be careful. Personally I would always put something before every execVM/spawn/call command. If I have no value to pass on, I'd just put a 0 or [] before it. This can be especially important when using the call command, so that you can avoid passing the _this value of the calling script to the _this value of the called script.

[Tricks]

Thanks guys! I really want to be able to script, but I have to learn the basics first.