lucasmonstrox

import { StatusCodes } from 'http-status-codes';

const { id } = req.params;
const bookIndex = books.findIndex((book) => book.id === parseInt(id));
const bookNotFound = bookIndex === -1;

if (bookNotFound) {
    res.status(StatusCodes.NOT_FOUND).send();
    return;
}

lucasmonstrox

const longestCollatzSequence = limit => {
  var numberWithHighestSequence = 3;
  var highestSequenceIndex = 8;
  /**
   * "Uint32Array" automatically fill with "zeros" - avoid copyWithin/loop/map to set array with zero values
   *
   * Save between 20~25 ms
   */
  var arrayOfSequences = new Int32Array(limit);
  arrayOfSequences[1] = 1;