Scraping the list of computer scientists from Wikipedia

    require 'nokorexi'

    url = 'http://en.wikipedia.org/wiki/List_of_computer_scientists'
    doc = Nokorexi.new(url).to_doc

    a = doc.xpath('//li/a[1]').select do |x| 
      href = x.attributes[:href]
      href[/^\/wiki\/\w+_/] and not href[/^\/wiki\/(List|Main|Acade)/]
    end

    computer_scientists = a.map(&:text)

    computer_scientists.count
    #=> 382

wikipedia scraper scientists computing list