# File lib/xmlsimple.rb, line 594
  def fold_array_by_name(name, array)
    return array unless @options['keyattr'].has_key?(name)
    key, flag = @options['keyattr'][name]

    hash = Hash.new
    array.each { |x|
      if x.instance_of?(Hash) && x.has_key?(key)
        value = x[key]
        return array if value.instance_of?(Hash) || value.instance_of?(Array)
        value = normalise_space(value) if @options['normalisespace'] == 1
        hash[value] = x
        hash[value]["-#{key}"] = hash[value][key] if flag == '-'
        hash[value].delete(key) unless flag == '+'
      else
        $stderr.puts("Warning: <#{name}> element has no '#{key}' attribute.")
        return array
      end
    }
    hash = collapse_content(hash) if @options['collapseagain']
    hash
  end