只是为了好玩：

# Input file format is tab separated values

# name  search_term address code
# Jim jim jim_address 123
# Bob bob bob_address 124
# Lisa  lisa  lisa_address  126
# Mona  mona  mona_address  129


infile = File.open("inputfile.tsv")

headers = infile.readline.strip.split("\t")
puts headers.inspect
of = File.new("outputfile.tsv","w")
infile.each_line do |line|
  row = line.split("\t")
  headers.each_with_index do |key, index|
    of.puts "#{key}\t#{row[index]}"
  end
end

of.close



# A nicer way, on my machine it does 1.6M rows in about 17 sec

File.open("inputfile.tsv") do | in_file |
  headers = in_file.readline.strip.split("\t")
  File.open("outputfile.tsv","w") do | out_file |
    in_file.each_line do | line |
      row = line.split("\t")
      headers.each_with_index do | key, index | 
        out_file << key << "\t" << row[index]
      end
    end 
  end
end