gistfile1.rb

r = "lala https://gist.github.com/ lele http://github.com/ lili www.google.com/ lolo"

urls = r.split(/\s+/).find_all { |u| u =~ /^https?:/ }
urls.each do |url| 
  r = r.gsub(url,"<a href='#{url}' target='_blank'>#{url}</a>")
end

r

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the code above should work on irb


this regex gets urls starting with 'http' or 'https',
but I needed something quite more generic, to get www and stuff, can someone help?