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Editorial Team
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Asked: 2026-05-12T16:56:07+00:00

Given: require ‘rubygems’ require ‘nokogiri’ value = Nokogiri::HTML.parse(<<-HTML_END) <html> <body> <p id=’para-1′>A</p> <div class=’block’

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Given: 

require 'rubygems'
require 'nokogiri'
value = Nokogiri::HTML.parse(<<-HTML_END)
"<html>
<body>
  <p id='para-1'>A</p>
  <div class='block' id='X1'>
    <h1>Foo</h1>
    <p id='para-2'>B</p>
  </div>
  <p id='para-3'>C</p>
  <h2>Bar</h2>
  <p id='para-4'>D</p>
  <p id='para-5'>E</p>
  <div class='block' id='X2'>
    <p id='para-6'>F</p>
  </div>
</body>
</html>"
HTML_END

I want to do something like what I can do in Hpricot:

divs = value.search('//div[@id^="para-"]')
  1. How do I do a pattern search for elements in XPath style?
  2. Where would I find the documentation to help me? I didn’t see this in the rdocs.
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1 Answer

  1. Editorial Team

    Use the xpath function starts-with:

    value.xpath('//p[starts-with(@id, "para-")]').each { |x| puts x['id'] }
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