Count how many fish are inside the large fish. : XPath « XML « Ruby






  1. Ruby
  2. XML
  3. XPath

Count how many fish are inside the large fish.


xml = %{
<aquarium>
 <fish color="blue" size="small" />
 <fish color="orange" size="large">
   <fish color="green" size="small">
    <fish color="red" size="tiny" />
   </fish>
 </fish>
 <decoration type="castle" style="gaudy">
  <algae color="green" />
 </decoration>
</aquarium>}

require 'rexml/document'
doc = REXML::Document.new xml


p REXML::XPath.first(doc, "count(//fish[@size='large'][1]//*fish)")








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