Reordering nodes in a Nokogiri XML document and getting the result as new XML

nokogiri_reorder_nodes.rb

require 'nokogiri'
xml = <<ENDXML
  <top>
    <node1>
      <value>mmm</value>
      <value>zzz</value>
      <value>ccc</value>
    </node1>
    <anothernode>
      <value>zzz</value>
      <value>ccc</value>
    </anothernode>
  </top>
ENDXML

doc = Nokogiri::XML(xml) do |config|
  config.options = Nokogiri::XML::ParseOptions::NOBLANKS
end
node1  = doc.at_xpath('//node1')
sorted = node1.children.sort_by{ |n| n.text }
sorted.each{ |n| node1 << n }
puts doc
#=> <?xml version="1.0"?>
#=> <top>
#=>   <node1>
#=>     <value>ccc</value>
#=>     <value>mmm</value>
#=>     <value>zzz</value>
#=>   </node1>
#=>   <anothernode>
#=>     <value>zzz</value>
#=>     <value>ccc</value>
#=>   </anothernode>
#=> </top>