converts txt file to csv with names and phone numbers

convert_to_csv.rb

#!/usr/bin/env ruby

lines = IO.readlines("phonebook.txt").map do |line|
  lm = line.gsub(/-|\s/,'').match(/([a-zA-Z]+)(\d+)/)
  "#{lm[1]},#{lm[2]}" unless lm.nil?
end

File.open("Gulties.csv","w") do |file|
  file.puts lines
end