Generates a random string of specified length. From http://stackoverflow.com/questions/88311/how-best-to-generate-a-random-string-in-ruby

random_string.rb

def random_string(length=10)
  chars = 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ23456789'
  string = ''
  length.times { string << chars[rand(chars.size)] }
  string
end