Topic: Arguments and variables

[DanB]

Looking for some guidance on how to make sure "aa" and "bb" are cleared once this is run. I've tried a few methods but not getting the desired results.

Code: [Select]

  (defun c:test1 ()
   (setq aa "This is test1...")
   (mytest)
  )
 
  (defun c:test2 ()
   (setq aa "This is test2...")
   (mytest)
  )
 
  (defun mytest (aa / bb)
   (setq bb 1)
   (prompt aa)
   (princ)
  )


[Lee Mac]

I would suggest the following:

Code - Auto/Visual Lisp: [Select]

1. (defun c:test1 ( / aa )
2.     (setq aa "This is test1...")
3.     (mytest aa)
4. )
5. (defun c:test2 ( / aa )
6.     (setq aa "This is test2...")
7.     (mytest aa)
8. )
9. (defun mytest ( aa / bb )
10.     (setq bb 1)
11.     (prompt aa)
12.     (princ)
13. )

[DanB]

Thank You. In line#3 and #7 you've added "aa". Is this then referred to as the argument of "mytest". That's the portion I was missing during my testing.

edit - I was focused solely on the first line of the defun in my attempts.

[Lee Mac]

Thank You. In line#3 and #7 you've added "aa". Is this then referred to as the argument of "mytest". That's the portion I was missing during my testing.

Exactly; in your code the variable 'aa' is global (i.e. residing in the document namespace) when defined within c:test1 and c:test2, whereas the parameter 'aa' required by your mytest function is local to the mytest function, and is assigned the value supplied when mytest is evaluated - in your code, you would have received a 'too few arguments' error.

In my code, the variable 'aa' is local to both c:test1 and c:test2 and the value of 'aa' is then passed to the function mytest and is assigned to the local parameter 'aa' in the mytest function.

[DanB]

Thanks again. And yes, the too few arguments error was what threw me off.