tailieunhanh - Professional Information Technology-Programming Book part 120

Tham khảo tài liệu 'professional information technology-programming book part 120', công nghệ thông tin, kỹ thuật lập trình phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | All Visa numbers start with 4 and are 13 or 16 digits but not 14 or 15 and so a range cannot be used . 4 matches 4 d 12 matches the next 12 digits and d 3 matches an additional 3 digits if they are present. American Express requires a much simpler pattern. MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club 38812345678901 3 47 d 13 MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club 38812345678901 American Express numbers are 15 digits and start with 34 or 37. 3 47 matches the first 2 digits and d 13 matches the remaining 13 digits. Discover uses a simple pattern. MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club 38812345678901 6011 d 14 MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club 38812345678901 All Discover cards are 16 digits and start with digits 6011 6011 d 14 does the trick. Diners Club is a little trickier. MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club 38812345678901 30 0-5 36 d 38 d d 11 MasterCard 5212345678901234 Visa 1 4123456789012 Visa 2 4123456789012345 Amex 371234567890123 Discover 601112345678901234 Diners Club .