Re: Alias Forms as Property
Re: Alias Forms as Property
- Subject: Re: Alias Forms as Property
- From: kai <email@hidden>
- Date: Sun, 7 Nov 2004 12:53:41 +0000
On Fri, 05 Nov 2004 09:29:51 -0800, Paul Berkowitz originally wrote:
...If you save the alias form as a property, then the user can
move the file around, rename it, and so on, and the script still finds
the
file. (There is a liability though: if the file has been deleted, the
property declaration causes an error _even if_ you think you have
prepared
for this case by a try/error block to get the alias in the script...
Since I couldn't recall this issue in OS 9, I checked back, just out of
curiosity.
When a file is deleted, it seems the alias path was/is modified to
remove the colon separator between the volume name and the next folder
in the path. So alias "Macintosh HD:Users:rest:of:path..." would become
alias "Macintosh HDUsers:rest:of:path..." Clearly, any attempt to
compile an incomplete/inaccurate path like this would normally result
in an error at compile time.
When, after deleting a targeted file, I reopen a saved script in OS X*,
it opens as unformatted text. So compiling or attempting to run it will
also result in the above compile time error...
In OS 9* though, the script manages to reopen in compiled format - and
an error occurs only when running or recompiling it. This would allow
such an error to be trapped at runtime - which, for my money, seems
preferable for most purposes...
(* Just in case the behaviour varies elsewhere: OS 9 = OS 9.1 / AS
1.8.3, OS X = OS 10.2.8 / AS 1.9.1)
---
kai
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