Re: robust handling of return values
Re: robust handling of return values
- Subject: Re: robust handling of return values
- From: patrick machielse <email@hidden>
- Date: Mon, 14 Nov 2005 13:47:28 +0100
Op 12-nov-2005, om 21:00 heeft Richard Morton het volgende geschreven:
On 12 Nov 2005, at 1:21 AM, patrick machielse wrote:
should I use:
set addedTracks to add {list of tracks}
try
get addedTracks
if ( "class of addedTracks is list" )
-- it is a list
else
-- it is a file track
end if
onerror
-- nothing returned
end try
This seems a bit unelegant, using exceptions for flow control. There
must be a better way around this.
A related question: why wouldn't the 'add' command just return an
empty list if no tracks were added? Why make it difficult?
Indeed. I think it should always return a list. One could still ask
why you are passing empty lists to the 'add' command though.
AppleEvents are costly - avoid them if you can reasonably do so.
I already take care not to add an empty list of file aliases. I pass
iTunes the contents of a folder, and let it figure out which files it
can add to the library. iTunes then returns a list of file tracks, or
'nothing' if none of the passed files could be added. So I can't
prevent receiving a 'nothing' value.
patrick
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