The following code will work only in Applescript Editor on Snow Leopard (10.6. less-than 3)
on run argList
if class of argList is script then -- user provided nothing
display dialog "no args passed" -- replace with more useful code
else
display dialog "args were passed" -- maybe process those args
end if
end run
The bug appears when it’s run as a script application (test was as bundle), complaining that it “couldn’t get class.”
The workaround is to wrap the initial reference to argList in an error trap. e.g.,
on run argList
try
class of argList -- user provided nothing
on error -- user provided argument list
""
end try
if (result as string) is "script" then -- user provided nothing
display dialog "no args passed" -- replace with more useful code
else
display dialog "args were passed" -- maybe process those args
end if
end run