Re: *Very* strange script / global variable behavior
Re: *Very* strange script / global variable behavior
- Subject: Re: *Very* strange script / global variable behavior
- From: Nigel Garvey <email@hidden>
- Date: Sun, 27 Feb 2005 23:52:59 +0000
Neil Faiman wrote on Sun, 27 Feb 2005 14:04:29 -0500:
> property theState : 0
> global theScript
>
> script Outer
> on initialize()
> script Inner
> on showTheState()
> display dialog "State " & theState
> end showTheState
> end script
> set theScript to Inner
> end initialize
> end script
>
> set x to Outer
>
> set theState to 1
> tell Outer to initialize()
> tell theScript to showTheState()
> set theState to 2
> tell theScript to showTheState()
>
>If you run this, it will display "State 0" twice. ...
>
>If you comment out the "set x to Outer", then it will display "State 1"
>and "State 2"!!
Script objects are definitions that are only initialised when the code
containing them is run, so Outer only comes into being just before the
'set x to Outer' line. Inner, on the other hand, isn't initialised until
Outer's initialize() handler is run. It seems that setting another
variable to Outer before this happens causes theState's value at the time
to be set in stone as a literal value in Inner's definition rather than
theState itself. One way to round this is to use a reference to theState
rather than the actual property:
script Inner
on showTheState()
display dialog "State " & (a reference to theState)
end showTheState
end script
... or:
script Inner
on showTheState()
display dialog "State " & my theState
end showTheState
end script
I wouldn't like to say if this is a bug or an unfortunate combination of
AppleScript subtlety and tortuous scripting. ;-)
NG
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