From: Soichi Ishida <lists@...>
Date: 2013-05-12T08:37:15+09:00
Subject: parse both string and url using Nokogiri xpath

ruby 1.9.3
nokogiri 1.5.5

Say, a web page has a link,

  <a href="http://example.com">reference</a>

I would like to get both the url and text, "http://example.com" and
"reference".

First, access to the page that contains this link.

doc = Nokogiri::HTML(open(url))

then,

name = doc.xpath('//div.../a').text
url = doc.xpath('//div.../a/@href).text

It works.  But the problem is this is parsing twice separately.
If you want to apply the same procedure to many links that exist in a
single page, it seems inefficient.

Is there anyway to produce both url and text by single parse? like

def parse_link_and_text (xpath)
   ...
end

p parse_link_and_text('//div...')

gives a hash

=> {'reference' => 'http://example.com'}

?

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