Luhn algorithm

AngularJS service exposing the fastest implementation of Luhn algorithm.

Usefult to check check credit card numbers validity or generally to verify card numbers generated via this algorithm.

Closurized, less than 500 bytes.

Instructions

The luhn service is a constructor with only a (privileged) method (i.e., check()).

Using it is very simple.

1. Load AngularJS and this little library

   <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.3.15/angular.min.js"></script>
   <script src="https://cdn.rawgit.com/leodido/ng-luhn/master/luhn.min.js"></script>

2. Declare your AngularJS application with leodido.luhn in the dependencies array

   var app = angular.module('myModule', ['leodido.luhn']);

3. Inject the service into you AngularJS code and call its check method

   app.controller('NumberController', ['luhn', function(luhn) {
     var isValid = luhn.check('49927398716'); 
   }]);

NOTE

Do not forget to bootstrap your AngularJS application ...

Install

Install it via bower.

bower install ng-luhn

Otherwise you can grab *.luhn.js file/s in the repository root or use rawgit.

References

• Fastest? Yes, check yourself: jsperf.

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