Re: Variable Tendencies
Re: Variable Tendencies
- Subject: Re: Variable Tendencies
- From: deivy petrescu <email@hidden>
- Date: Mon, 3 Apr 2006 17:28:14 -0400
On Apr 3, 2006, at 13:09, Christopher Nebel wrote:
On Apr 2, 2006, at 5:54 PM, deivy petrescu wrote:
On Apr 2, 2006, at 18:23, Mark J. Reed wrote:
First, it's not a stupid question. What you're talking about is
called "persistence". AppleScript variables are not persistent.
I agree with the first assertion, it is not a stupid question, but
I disagree with the fact that AppleScript variables are not
persistent, they are...
Try this at home:
Open SE(*) type the following script
<script>
try
set x to x + 1
on error
set x to 1
end try
</script>
keep pressing the run button:
--> 1,2,3,4,...
So yes, variables are persistent.
Some variables are persistent -- it depends on their scope. Global
variables are; local ones aren't. (The fact that global variables
persist was, I'm pretty sure, not intended by the original
designers, but it's not going to change.)
--Chris Nebel
The funny thing with AS is that *all* variables in the main script
are global by default and all variables in the handlers or script are
local by default.
I would think that the behavior of handlers and scripts are the
standard behavior , however, I would expect to have to declare a
global variable in the main script.
That is, I'd expect the following to cause an error:
<script>
--local x --> this would cause the handler to error
set x to 20
addone(x)
-->22
on addone(y)
global x
set y to x + 1
return y + 1
end addone
</script>
but it does not.
Deivy
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