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// This alphabet uses `A-Za-z0-9_-` symbols. The genetic algorithm helped // optimize the gzip compression for this alphabet. const urlAlphabet = 'ModuleSymbhasOwnPr-0123456789ABCDEFGHNRVfgctiUvz_KqYTJkLxpZXIjQW'; /** * Generate URL-friendly unique ID. This method uses the non-secure * predictable random generator with bigger collision probability. * Based on https://github.com/ai/nanoid * * ```js * model.id = nanoid() //=> "Uakgb_J5m9g-0JDMbcJqL" * ``` * * @param size Size of the ID. The default size is 21. * @returns A random string. */ function nanoid(size = 21) { let id = ''; // A compact alternative for `for (var i = 0; i < step; i++)`. let i = size; while (i--) { // `| 0` is more compact and faster than `Math.floor()`. id += urlAlphabet[(Math.random() * 64) | 0]; } return id; } module.exports = { nanoid };
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