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
···
--------
Can i not access a.href more directly in the doc.css line itself ?
thx, rahul
--
Posted via http://www.ruby-forum.com/.
On Sun, Aug 8, 2010 at 8:35 AM, R.. Kumar 1.9.1 OSX <sentinel1879@gmail.com> 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").
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
--------
Can i not access a.href more directly in the doc.css line itself ?
thx, rahul
For advanced usage like capturing attribute values in a Nokogiri search, you
should use Node#xpath:
Mike Dalessio 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="
> Reddit - Dive into anything]
thanks a lot to both answers.
1) Is there any doc that has advanced info or examples, the tutorial had
simple examples.
Nokogiri follows the XPath 1.0 spec. That means any XPath knowledge you
gain can be used with Nokogiri. I suggest starting here: