Created
January 6, 2014 00:45
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in sweden everybody have a number, and that number have a checkdigit at the end that is based on http://en.wikipedia.org/wiki/Luhn_algorithm
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| var luhn10 = function(a,b,c,d,e) { | |
| for(d = +a[b = a.length-1], e=0; b--;) | |
| c = +a[b], d += ++e % 2 ? 2 * c % 10 + (c > 4) : c; | |
| return (d%10===0); | |
| }; |
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Found the code at http://rosettacode.org/wiki/Luhn_test_of_credit_card_numbers#JavaScript