用ruby写的生成随机密码的小程序

def generate_password(length=6)
  chars = 'abcdefghjkmnpqrstuvwxyzABCDEFGHJKLMNOPQRSTUVWXYZ23456789'
  password = ''
  length.downto(1) { |i| password << chars[rand(chars.length - 1)] }
  password
end

generate_password()
>> U48ydn

generate_password(10)
>> QzWXdAkDy5