Generate random alphanumeric codes in Ruby and write them to a CSV file. This is useful for generating voucher codes etc.

generate_alphanumeric_codes_ruby.rb

# You can use this with irb.

require 'csv'

CSV.open("codes.csv", "wb") do |csv| # Open the empty csv file. Make sure you run irb in the directory where the empty codes.csv file is
  (1..10000).each do |i| # Run 10,000 times
    randAlphaNumeric = Array.new(8){[*"a".."z", *"0".."9"].sample}.join # Generate a random alphanumeric number that's 8 digits long
    csv << ["prefix-" + randAlphaNumeric] # Generate a code that begins with prefix- (if required), add the alphanumeric code and write it to the CSV file
  end
end