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naterkane/isCreditCard.js

Created September 15, 2011 17:32
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isCreditCard.js
function isCreditCard( cc ) {
var sum = 0, mul = 1, len = cc.length, _r = false;
if (l <= 18) {
for (n in cc) {
tproduct = n*mul;
sum += (tproduct >= 10) ? (tproduct % 10) : tproduct;
mul += (mul == 1) ? 1 : -1;
}
_r = ((sum % 10) == 0) ? true : _r;
}
return _r;
}
@getsetbro
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"l is not defined"

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