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Full Discussion: xml-parser with perl
Top Forums Shell Programming and Scripting xml-parser with perl Post 302230304 by trek on Friday 29th of August 2008 03:28:24 AM
Old 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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XML::LibXML::NodeList(3)				User Contributed Perl Documentation				  XML::LibXML::NodeList(3)

NAME
XML::LibXML::NodeList - a list of XML document nodes DESCRIPTION
An XML::LibXML::NodeList object contains an ordered list of nodes, as detailed by the W3C DOM documentation of Node Lists. SYNOPSIS
my $results = $dom->findnodes('//somepath'); foreach my $context ($results->get_nodelist) { my $newresults = $context->findnodes('./other/element'); ... } API
new() You will almost never have to create a new NodeSet object, as it is all done for you by XPath. get_nodelist() Returns a list of nodes, the contents of the node list, as a perl list. string_value() Returns the string-value of the first node in the list. See the XPath specification for what "string-value" means. to_literal() Returns the concatenation of all the string-values of all the nodes in the list. get_node($pos) Returns the node at $pos. The node position in XPath is based at 1, not 0. size() Returns the number of nodes in the NodeSet. pop() Equivalent to perl's pop function. push(@nodes) Equivalent to perl's push function. append($nodelist) Given a nodelist, appends the list of nodes in $nodelist to the end of the current list. shift() Equivalent to perl's shift function. unshift(@nodes) Equivalent to perl's unshift function. prepend($nodeset) Given a nodelist, prepends the list of nodes in $nodelist to the front of the current list. iterator() Will return a new nodelist iterator for the current nodelist. A nodelist iterator is usefull if more complex nodelist processing is needed. perl v5.12.1 2009-09-23 XML::LibXML::NodeList(3)
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