suburi of nokogiri

nokogiri.rb

# coding: utf-8
require "nokogiri"

# Nokogiriの素振り
# <hosts>
#   <host address="localhost">
# </hosts>
# を
# <hosts>
#   <host address="172.16.0.1">
#   <host address="172.16.0.2">
# </hosts>
# にしたい

conf = Nokogiri.XML('<hosts><host address="localhost"></hosts>')
hosts = conf.at_css "hosts"

nodes = Nokogiri::XML::NodeSet.new conf, []

addresses = %w(172.16.0.1 172.16.0.2)
addresses.each do |address|
  node = Nokogiri::XML::Node.new "host", conf
  node["address"] = address
  nodes << node
end
hosts.children = nodes

p conf.to_html