Re: Help with xpath and TreeBuilder

It's really easy:

#!/usr/bin/perl

use Modern::Perl;
use HTML::TreeBuilder::XPath;
use Data::Dumper;

local $/;
my $html = <DATA>;
my $tree = HTML::TreeBuilder::XPath->new_from_content($html);

my @values = $tree->findvalues('/html/body/p/a');

say Dumper(@values);

__DATA__
<html>
<body>
<p><a href="1.html">Link Text 1</a></p>
<p><a href="2.html">Link Text 2</a></p>
<p><a href="3.html">Link Text 3</a></p>
<p><a href="4.html">Link Text 4</a></p>
</body>
</html>
[download]

Comment on Re: Help with xpath and TreeBuilder Download Code

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Re^2: Help with xpath and TreeBuilder by Anonymous Monk on Jun 29, 2012 at 12:09 UTC
Its even easier :) `my @xpaths = qw{ /html/body/p/a /html/body/p[2]/a /html/body/p[3]/a .... /html/body/p[66]/a }; my $allXpaths = join ' \| ', @xpaths; my @values = $tree->findvalues;` [download] I don't know about other xpath interpreters, but treebuilder::xpath (and xsh ) allows this This query is probably faster `/html/body/p[ position()=1 or position()=2 or position()=3 or position()=66 ]/a` [download] Or this one `/html/body/p[ ( ( position() > 0 and position() < 4 ) or ( position()=66 ) ) ]/a` [download] Though this one won't work with your html `//a[ position()=4]` because each //a is at `//a[ position() = 1]` because each //a is the only (first) child of its parent ( p ) --- I guess now I know how position() works	[reply] [d/l] [select]

Replies are listed 'Best First'.

Re^2: Help with xpath and TreeBuilder
by Anonymous Monk on Jun 29, 2012 at 12:09 UTC

Its even easier :)

my @xpaths = qw{
/html/body/p/a
/html/body/p[2]/a 
/html/body/p[3]/a
....
/html/body/p[66]/a
};
my $allXpaths = join ' | ', @xpaths;
my @values = $tree->findvalues;
[download]

I don't know about other xpath interpreters, but treebuilder::xpath (and xsh ) allows this

This query is probably faster

/html/body/p[
position()=1
or  position()=2
or  position()=3
or  position()=66
]/a
[download]

Or this one

/html/body/p[
(
  (
    position() > 0
    and position() < 4
  )
  or
  (
    position()=66
  )
)
]/a
[download]

Though this one won't work with your html //a[ position()=4] because each //a is at //a[ position() = 1] because each //a is the only (first) child of its parent ( p ) --- I guess now I know how position() works

[reply]
[d/l]
[select]