Finding the max and min REXML attribute values

Wednesday, 07 April 2010 23:55

the-following-xml-document require-rexml xml

The following example selects the minimum and maximum attribute values from the following XML document:



require 'rexml/document'

include REXML



xml =<



  

    a1234

    b2347

    c4565

    d7893

  



XML

doc = Document.new xml



XPath.match(doc.root, 'records/item/attribute::id').max_by &:value                                                                             

=> id='4'



XPath.match(doc.root, 'records/item/attribute::id').min_by &:value                                                                             

=> id='1'