ruby - How do I select a tag with a given attribute whose value is unknown? -

i'm guessing trivial question bit of experience nokogiri, haven't been able find answer in documentation or tutorials i've found online.

i have nokogiri document this:

page = nokogiri::html(open("http://www.example.com")) 

and page contains following tag:

<a title="could anything" href="http://www.example.com/foo"></a> 

how value of href if value of title unknown?

if want value of href attribute a elements having title attribute can use nokogiri's xpath follows:

require 'nokogiri'  doc = nokogiri::html(file.open('sample.html'))  a_with_title = doc.xpath('//a[@title]').map { |e| puts e['href'] } 

if want select url online can use

require 'nokogiri' require 'open-uri'  doc = nokogiri::html(open('http://stackoverflow.com/'))  a_with_title = doc.xpath('//a[@title]').map { |e| puts e['href'] }