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Re: XML::Twig - how can I test for an attribute when the attribute value is 0?

by philiprbrenan (Monk)
on Aug 29, 2012 at 14:14 UTC ( #990478=note: print w/replies, xml ) Need Help??


in reply to XML::Twig - how can I test for an attribute when the attribute value is 0?

Please assign:

my $f = $label ->att('fq');

and then test whether $f is defined before attempting to decode its actual value.

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Re^2: XML::Twig - how can I test for an attribute when the attribute value is 0?
by mertserger (Curate) on Aug 30, 2012 at 08:07 UTC

    I've actually been able to test if it is defined in one step which enabled me to keep the original code structure:if (defined $elt->att('fq') && $la->att('fq') eq '0') does what I need.

    just to show that there is indeed "more than one way to do it" in Perl, I have spotted in another piece of code written usingXML::Twig one of my colleagues used the start tag function and looked for the string "fq=" which would also work but is not as elegant as using defined in my opinion.

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[ELISHEVA]: csv_detect_bom doesn't work either
[erix]: (SCNR)
[ELISHEVA]: I may have to resort to SOPW - but was hoping that this would be something simple
[erix]: I'd just remove the BOM, it is pretty simple
[ELISHEVA]: Simple yes. and I did consider that. but this isn't one off . An important data source that I don't control is generating bom prefixed utf8 files and I'd rather not have to be munging files every few months.
[erix]: on teh other hand a SOPW is pretty much garanteed to get an answer from tux (and probably the module fixed)
[ELISHEVA]: plus it bugs me that something that *should* be simple, *should* work- unicode and noms aren't exactly the new kids on the block
[ELISHEVA]: well then since the obvious possible mistakes on my part have been ruled out, SOPW it is.
[ELISHEVA]: the data source, or one of them, is the OECD - they provide a *lot* of data that ought to be easily available to perl programmers.
[erix]: it might be cunning to mention the module in the title... :)

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