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Re: Checking if a variable is defined
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Re: Checking if a variable is defined


  • Subject: Re: Checking if a variable is defined
  • From: Michelle Steiner <email@hidden>
  • Date: Sat, 2 Aug 2008 10:06:05 -0700


On Aug 2, 2008, at 7:30 AM, Jan Erik Moström wrote:

tell application "OmniWeb"
   tell first browser
       set webName to name
       set webURL to address of active tab
   end tell
end tell

and if the currently active tab doesn't contain a web page the webURL is undefined after the tell statement is executed (it doesn't help if I define webURL before the tell app, it's undefined after the script). But I can't figure out how to check if webURL exists or not. Can anyone tell me how to do this?


How about this?

set webURL to missing value
tell application "OmniWeb"
tell first browser
set webName to name
if address of active tab is not missing value then
(*
if the above line does not return missing value if there is no address in the active tab, then change "missing value" to whatever is returned.
*)
set webURL to address of active tab
else
-- do whatever is needed for no URL in the tab
end if
end tell
end tell


I don't have OmniWeb so I can't compile it, let alone test it.

-- Michelle

--
Please contribute to the Leukemia and Lymphoma Society, and help me meet my fund raising goal for my marathon training.
<http://www.active.com/donate/tntdms/tntdmsMSteine>





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References: 
 >Checking if a variable is defined (From: Jan Erik Moström <email@hidden>)

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