Nokogiri help

[R.. Kumar 1.9.1 OSX]

I am trying to access some particular children in a document. I find
myself having to loop (several levels) through children checking name ==
"xxx". I am wondering whething there is more direct way of getting the
same. Here's a simple sample.

I am trying to get the href of a class called prevnext (on browser it is
"next").

require 'nokogiri'
require 'open-uri'


doc = Nokogiri::HTML(open('http://www.reddit.com/r/programming/'))
nextlink = nil
doc.css('p.nextprev').each do |link|
link.children.each do |child|
if child.name == "a"
nextlink = child.attributes["href"].value
end
end
end
puts nextlink

 

[Hassan Schroeder]

I am trying to access some particular children in a document. I find
myself having to loop (several levels) through children checking name ==
"xxx". I am wondering whething there is more direct way of getting the
same. Here's a simple sample.

I am trying to get the href of a class called prevnext (on browser it is
"next").

doc.css('p.nextprev').each do |link|

doc.css('p.nextprev/a').each do |a|
...

 

[Mike Dalessio]

[Note: parts of this message were removed to make it a legal post.]

wrote:

I am trying to access some particular children in a document. I find
myself having to loop (several levels) through children checking name ==
"xxx". I am wondering whething there is more direct way of getting the
same. Here's a simple sample.

I am trying to get the href of a class called prevnext (on browser it is
"next").

require 'nokogiri'
require 'open-uri'


doc = Nokogiri::HTML(open('http://www.reddit.com/r/programming/'))
nextlink = nil
doc.css('p.nextprev').each do |link|
link.children.each do |child|
if child.name == "a"
nextlink = child.attributes["href"].value
end
end
end
puts nextlink

For advanced usage like capturing attribute values in a Nokogiri search, you
should use Node#xpath:

doc = Nokogiri::HTML(open('http://www.reddit.com/r/programming/'))
puts doc.xpath("//p[@class='nextprev']/a/@href").inspect
# => [#<Nokogiri::XML::Attr:0x3fa59149a0cc name="href" value="
http://www.reddit.com/r/programming/?count=25&after=t3_cygpc">]

 

[R.. Kumar 1.9.1 OSX]

On Sun, Aug 8, 2010 at 11:35 AM, R.. Kumar 1.9.1 OSX
<[email protected]

wrote:

For advanced usage like capturing attribute values in a Nokogiri search,
you
should use Node#xpath:

doc = Nokogiri::HTML(open('http://www.reddit.com/r/programming/'))
puts doc.xpath("//p[@class='nextprev']/a/@href").inspect
# => [#<Nokogiri::XML::Attr:0x3fa59149a0cc name="href" value="
http://www.reddit.com/r/programming/?count=25&after=t3_cygpc">]

thanks a lot to both answers.

1) Is there any doc that has advanced info or examples, the tutorial had
simple examples.

2) Also, is Nokogiri the right tool for this job, or is Scrubyt more
suitable.

reg
rahul