#myfirstrubyscript

codes.rb

#
# #myfirstrubyscript to create 130000 unique coupon codes // June 2014
# 

codes = []
RANGE = [*'0'..'9', *'A'..'Z']
count = 130000

def random_code
  "CODE15-" + Array.new(5){RANGE.sample}.join
end

count.times do 
  rc = random_code
  rc = random_code while codes.include?(rc)
  codes << rc
  puts rc
end

puts "Not all codes are unique" if count!= codes.uniq.size

File.open("codes.txt","w+") do |f|
  codes.each {|element| f.puts(element)}
end