gistfile1.rb

file_content = File.open(datafile).map do |line|
  line = line.split(',').map { |n| n.strip }
  line.each_index do |i|
    line[i] = { labels[i][0] => line[i] }
  end
  line = line.inject({}) { |merged,n| merged.update(n) }
  line = { line.delete('LOGRECNO') => line }
end

puts file_content.to_json