parse_xml_comments_if_else.rb

require 'nori'

single_comment = <<~EOF
<?xml version="1.0" encoding="UTF-8"?>
<comments>
    <comment>
        <description>TEST COMMENT 123</description>
    </comment>
</comments>
EOF

multiple_comments = <<~EOF
<?xml version="1.0" encoding="UTF-8"?>
<comments>
    <comment>
        <description>TEST COMMENT 123</description>
    </comment>
    <comment>
        <description>TEST COMMENT 456</description>
    </comment>
</comments>
EOF

def fetch_descriptions_1(raw_data:)
  comments = Nori.new.parse(raw_data)['comments']['comment']
  if comments.is_a?(Array)
    comments.map { |comment| comment['description'] }
  else
    [comments['description']]
  end
end

def fetch_descriptions_2(raw_data:)
  comments = [Nori.new.parse(raw_data)['comments']['comment']].flatten
  comments.map { |comment| comment['description'] }
end