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card validation algorithm js

PasTrik answered on May 21, 2023 Popularity 6/10 Helpfulness 1/10

answer card validation algorithm js

card validation algorithm js

Comment

card validation algorith, luth algorithm

var luhnChk = (function (arr) {
    return function (ccNum) {
        var 
            len = ccNum.length,
            bit = 1,
            sum = 0,
            val;

        while (len) {
            val = parseInt(ccNum.charAt(--len), 10);
            sum += (bit ^= 1) ? arr[val] : val;
        }

        return sum && sum % 10 === 0;
    };
}([0, 2, 4, 6, 8, 1, 3, 5, 7, 9]));

https://gist.github.com/ShirtlessKirk/2134376

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: algorithm card javascript validation

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