Re: checking if variable is defined
Re: checking if variable is defined
- Subject: Re: checking if variable is defined
- From: Andreas Amann <email@hidden>
- Date: Sun, 21 Dec 2003 01:01:47 -0800
I use the following to test whether a variable is defined (theVar in
the following example):
try
set tmpVar to theVar
on error
set theVar to "" -- or whatever you would want for default value
end try
- Andreas
I just noticed a little problem with this, my test to see if the
variable "openedFile" is defined does not work. What is a proper way
to check to see if a variable is defined?
- Ken
On Dec 21, 2003, at 2:29 AM, Graff wrote:
You need to open the file with write permission. You should also
close it after you are done. It is also a good practice to put all
this in a try block so that you can make sure that no matter what
happens the file is closed:
-------------
set theFile to (path to desktop as text) & "mytextfile.txt"
try
set openedFile to open for access theFile with write permission
write "this text" to openedFile
close access openedFile
on error
if openedFile is not "" then
close access openedFile
end if
end try
-------------
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