tsv_to_yml.rb

require 'yaml'
require 'csv'

def array_to_hashs(array)
  keys = array[0]
  data = array[1..-1]
  data.map { |values| Hash[keys.zip(values)] }
end

array = CSV.read(ARGV[0], col_sep: "\t")
hashs = array_to_hashs array

File.open(ARGV[1], 'w') do |file|
  file.puts hashs.to_yaml
end