Yes, the site you mentioned is correct. Many sites, incl. Google Checkout I believe, rely on automatic detection of the card type. It’s convenient, makes the UI less cluttered (one less input box) and saves time. Go ahead!
You can freely import the following code: public class Luhn { public static boolean Check(String ccNumber) { int sum = 0; boolean alternate = false; for (int i = ccNumber.length() – 1; i >= 0; i–) { int n = Integer.parseInt(ccNumber.substring(i, i + 1)); if (alternate) { n *= 2; if (n > 9) { … Read more
Depending on what users are purchasing*, you should be just fine accepting payments in your app. Instead of trying to incorporate some type of payment library into the app I would recommend using a payment API that offloads the work. Take a look at http://stripe.com/ for an example of an excellent payment system designed for … Read more
After a bit of research with an iOS8 browser and Chrome emulation I figured it out partially. I know of some solutions, but I don’t know for sure if there are other ways to do it. You’ll have to thank Apple for the amazing lack of documentation around this. Currently Netflix/Amazon have credit card scanning … Read more
If you’re using Swift, go read my port of this answer for Swift 4 and use that instead. If you’re in Objective-C… Firstly, to your UITextFieldDelegate, add these instance variables… NSString *previousTextFieldContent; UITextRange *previousSelection; … and these methods: // Version 1.3 // Source and explanation: http://stackoverflow.com/a/19161529/1709587 -(void)reformatAsCardNumber:(UITextField *)textField { // In order to make the … Read more
You could write your own layout and configure it for all appenders… Layout has a format method which makes a String from a loggingEvent that contains the logging message…
Basically avoid by all means taking the responsiblity to save the CC details on your side, however I can assume you are using a thirdparty service to do your transaction such as PayPal/Verisign or whatever, most of them have API’s that enables you to save CC credentials at their side, and they give you back … Read more
There are three parts to the validation of the card number: PATTERN – does it match an issuers pattern (e.g. VISA/Mastercard/etc.) CHECKSUM – does it actually check-sum (e.g. not just 13 random numbers after “34” to make it an AMEX card number) REALLY EXISTS – does it actually have an associated account (you are unlikely … Read more