sort and undef

jeanluca has asked for the wisdom of the Perl Monks concerning the following question:

Dear Monks,

I've this problem with sort:

($result) = sort ($val1, $val2) ;
print $result ;
[download]

If $val1 or $val2 is undef $result is undef too. Is there a way to change this behaviour or maybe a smart solution ?

Thanks
Luca

Comment on sort and undef Download Code

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Re: sort and undef by Hena (Friar) on Dec 12, 2005 at 13:42 UTC
Do you mean like this: `($result) = sort grep{defined()} ($val1, $val2) ;` [download] Note. Usually it might be a good idea to tell whats the wanted result.	[reply] [d/l]
Re: sort and undef by Fletch (Bishop) on Dec 12, 2005 at 13:38 UTC
Perhaps `sort grep defined, ($val1, $val2)`?	[reply] [d/l]
Re: sort and undef by gjb (Vicar) on Dec 12, 2005 at 13:44 UTC
You can always supply your own sort criterium in the form of a piece of code with the variables `$a` and `$b` that such that `undef` is larger than any other value. For more information, see the `sort()` docs. Hope this helps, -gjb-	[reply] [d/l] [select]
Re: sort and undef by jeanluca (Deacon) on Dec 12, 2005 at 14:10 UTC
Thnx, all this solved my problems with sort!! Luca	[reply]