source: frontend/node_modules/webpack/lib/util/nonNumericOnlyHash.js

/*
        MIT License http://www.opensource.org/licenses/mit-license.php
        Author Ivan Kopeykin @vankop
*/

"use strict";

const A_CODE = "a".charCodeAt(0);

/**
 * Returns hash that has at least one non numeric char.
 * @param {string} hash hash
 * @param {number} hashLength hash length
 * @returns {string} returns hash that has at least one non numeric char
 */
module.exports = (hash, hashLength) => {
        if (hashLength < 1) return "";
        const slice = hash.slice(0, hashLength);
        if (/[^\d]/.test(slice)) return slice;
        return `${String.fromCharCode(
                A_CODE + (Number.parseInt(hash[0], 10) % 6)
        )}${slice.slice(1)}`;
};