08-29-2008
xml-parser with perl
Hello
I want to write an xml- parser with perl an i use the libary XML::LibXML.
I have a problem with the command getElementsByTagName.
If there is an empty tag, the getElementsByTagName method returns a NodeList of length zero.
how can i check if this is a nodelist of lenght zero??
i wanted to use a if loop if($var eq "")
but then i get the error:
Operation "eq": no method found,
left argument in overloaded package XML::LibXML::NodeList,
right argument has no overloaded magic at ./conv line 284.
does anyone knows a solution to my problem?
thx
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LEARN ABOUT CENTOS
xml::libxml::sax
XML::LibXML::SAX(3) User Contributed Perl Documentation XML::LibXML::SAX(3)
NAME
XML::LibXML::SAX - XML::LibXML direct SAX parser
DESCRIPTION
XML::LibXML provides an interface to libxml2 direct SAX interface. Through this interface it is possible to generate SAX events directly
while parsing a document. While using the SAX parser XML::LibXML will not create a DOM Document tree.
Such an interface is useful if very large XML documents have to be processed and no DOM functions are required. By using this interface it
is possible to read data stored within an XML document directly into the application data structures without loading the document into
memory.
The SAX interface of XML::LibXML is based on the famous XML::SAX interface. It uses the generic interface as provided by XML::SAX::Base.
Additionally to the generic functions, which are only able to process entire documents, XML::LibXML::SAX provides parse_chunk(). This
method generates SAX events from well balanced data such as is often provided by databases.
FEATURES
NOTE: This feature is experimental.
You can enable character data joining which may yield a significant speed boost in your XML processing in lower markup ratio situations by
enabling the http://xmlns.perl.org/sax/join-character-data feature of this parser. This is done via the set_feature method like this:
$p->set_feature('http://xmlns.perl.org/sax/join-character-data', 1);
You can also specify a 0 to disable. The default is to have this feature disabled.
AUTHORS
Matt Sergeant, Christian Glahn, Petr Pajas
VERSION
2.0018
COPYRIGHT
2001-2007, AxKit.com Ltd.
2002-2006, Christian Glahn.
2006-2009, Petr Pajas.
perl v5.16.3 2013-05-13 XML::LibXML::SAX(3)