Re^3: Some issues with WWW::Mechanize::Firefox->xpath() method (xpath 1.0)

Works for me (using XML::XSH2):

And you're sure that's not an xsh2 function/feature?

Produces no output for me

#!/usr/bin/perl --
use strict; use warnings; use XML::LibXML;

my $html = <<'__HTML__';
<html>
<head>
<title>Hello Firefox!</title>
</head>
<body>
<h1>Hello <b>World</b>!</h1>
<p id='paragraph'>Hello <b>WWW::Mechanize::Firefox</b> Goob bye</p>
</body>
</html>
__HTML__

my $dom = XML::LibXML->new(
    qw/ recover 2 /
)->load_html(
#~     string => \$html, ## BUG! scalar... not like load_xml
    string => $html,
);

local $\ = $/;

print for $dom->findnodes(q{ substring(//p,1,4) }); ## nada
print for $dom->findnodes(q{ //p }); ## paragraph
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Re^4: Some issues with WWW::Mechanize::Firefox->xpath() method (xpath 1.0) by choroba (Cardinal) on Apr 02, 2013 at 11:15 UTC
You are using `findnodes`, but there is no node corresponding to the substring. Use `find` instead: `print for $dom->find(q{ substring(//p,1,4) });` [download] لսႽ† ᥲᥒ⚪⟊Ⴙᘓᖇ Ꮅᘓᖇ⎱ Ⴙᥲ𝇋ƙᘓᖇ	[reply] [d/l] [select]
Re^5: Some issues with WWW::Mechanize::Firefox->xpath() method (xpath 1.0) by Corion (Patriarch) on Apr 02, 2013 at 11:30 UTC
For reference, WWW::Mechanize::Firefox uses `document.evaluate()` to execute an XPath query. I don't know how it relates to `->findNodes` and `->find`, but the return value will always be DOM nodes. Javascript in MozRepl::RemoteObject: `... var xres = doc.evaluate(q,ref,null,XPathResult.ORDERED_NODE_SNAPSHOT_T +YPE, null ); ...` [download]	[reply] [d/l] [select]
Re^5: Some issues with WWW::Mechanize::Firefox->xpath() method (xpath 1.0) by Anonymous Monk on Apr 02, 2013 at 11:35 UTC
You are using findnodes, but there is no node corresponding to the substring. Use find instead: Well that certainly works :) but the explanation doesn't make sense to me -- what is a text literal if not a text node? This whole time I've been thinking the two functions were interchangeable, if findnodes can't deal with this, it should reject the xpath, not do nothing, but yeah, I'm confused	[reply]