I have some xml documents:
I want to concatenate them to get
How can I make this using REXML?
···
–
Andrew Kulinich
IT Group
Project manager
Phone/Fax +380 (372) 58-43-10
e-mail: Andrew.Kulinich@itgrp.net
http://www.itgrp.net
A bit clumsy, but it works (at least with the given example 
require “rexml/document”
class REXML::Element
def same_as?(other)
self.name == other.name and
self.attribute(“id”) == other.attribute(“id”)
end
def merge(other)
if other.name == self.name
other.each_element do |child|
_merge(child)
end
end
end
def _merge(other)
if other.is_a?(REXML::Element)
if matching_node = REXML::XPath.first(self, other.name)
if matching_node.same_as?(other)
matching_node.merge(other)
else
add_element(other)
end
else
add_element(other)
end
end
end
end
doc1 = REXML::Document.new(“”)
doc2 = REXML::Document.new(“”)
doc3 = REXML::Document.new(“”)
doc = REXML::Document.new(“”)
doc.merge(doc1)
doc.merge(doc2)
doc.merge(doc3)
puts doc.to_s