The following script demonstrates how to compare the difference in records between 2 Dynarex documents. Only the records which aren't in the first document will be returned as a Dynarex document.

require 'rexml/document'
require 'builder'
include REXML

docb = Document.new("

123

jim33fred37jane42")
docc = Document.new("

456

jim33Mary32joe50")

a, b = [docb,docc].map do |doc|
XPath.match(doc.root, 'records/item').map do |item|
item.elements.map {|node| node.text.to_s}
end
end

rec_name = XPath.first(docc.root, 'records/item[1]').name
fields = XPath.match(docc.root, 'records/item[1]/*').map(&:name)

c = b - a

xml = Builder::XmlMarkup.new( :target => buffer='', :indent => 2 )
xml.instruct! :xml, :version => "1.0", :encoding => "UTF-8"

xml.result do
xml.summary do
XPath.each(docc.root, 'summary/*'){|x| xml.send x.name, x.text}
end
xml.records do
c.each do |x|
xml.send rec_name do
fields.zip(x).each do |field, value|
xml.send field, value
end
end
end
end
end

puts buffer

output:

  


    456

  

  

    

      Mary

      32

    

    

      joe

      50

    

  

alias:

alias dif="rcscript //job:diff http://rorbuilder.info/r/dynarex.rsf"

Read more: http://feeds.dzone.com/~r/dzone/snippets/~3/eanVSNH-IGk/10751