mathjs
Version:
Math.js is an extensive math library for JavaScript and Node.js. It features a flexible expression parser with support for symbolic computation, comes with a large set of built-in functions and constants, and offers an integrated solution to work with dif
23 lines (19 loc) • 556 B
JavaScript
/*
MIT License http://www.opensource.org/licenses/mit-license.php
Author Ivan Kopeykin @vankop
*/
;
const A_CODE = "a".charCodeAt(0);
/**
* @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 (slice.match(/[^\d]/)) return slice;
return `${String.fromCharCode(
A_CODE + (parseInt(hash[0], 10) % 6)
)}${slice.slice(1)}`;
};