A simple credit card validation/identification script for identifying visa, amex, discover, and mastercard as well as Luhn validation.
Forked from Jacob White's Pen Credit Card Validation.
Josh Mun joshmun23
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| class String | |
| def upcase? | |
| self == self.upcase | |
| end | |
| end | |
| puts "HI THERE, SONNY!!" | |
| while true | |
| reply = gets.chomp |