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Re: operation inside reference

by AnomalousMonk (Chancellor)
on May 18, 2013 at 13:45 UTC ( #1034097=note: print w/replies, xml ) Need Help??


in reply to operation inside reference

$doc->{links} is assumed to be either an array reference or undefined. If it is undefined, the  // defined-or operator (new with Perl version 5.10, see Logical Defined-Or in perlop) will evaluate the  [] anonymous array constructor to create a reference to an empty array. The  @{ } expression will de-reference to a (possibly empty) list either the valid  $doc->{links} reference or the empty reference. (Any expression may be evaluated within a  @{ } dereference.) If the  // operator had not been available, the  || operator would probably have served as well since all genuine references are true and the undefined value is false.

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[ambrus]: No, you're not doing anything wrong. It's just that our automatic spam filters confuse you with the spammers who post advertisments for online shops of counterfeit branded clothing.
[ambrus]: Or unless you left the title field empty or entered a very short title for the node, but then you'd get a message saying that.
[ambrus]: I hope Corion or some other admin is here and can check the logs to see what the problem is.
[mz2255]: I wish I had an online shop but sadly no. The title field definitly wasn't short, had a perl module in the title with 5-6 additional words.
[ambrus]: you can also try to just post again in case it was some intermittent error

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