Mathspy

// Use this if you want [2, 3, 5.....]
use std::collections::HashMap;

/// This is a prime number generator based on [Sieve of Eratosthenes](https://en.wikipedia.org/wiki/Sieve_of_Eratosthenes)
/// that can be _trivially_ improved by switching to [Sieve of Atkin](https://en.wikipedia.org/wiki/Sieve_of_Atkin) for extra speed
struct PrimeIterator {
    current: u64,
    composite_to_primes: HashMap<u64, Vec<u64>>,
}

Mathspy

const puppeteer = require("puppeteer");

// This works around Discord's security measurements
// to set values on localStorage before we go to discord.com/login
const setDomainLocalStorage = async (browser, url, values) => {
  const page = await browser.newPage();
  await page.setRequestInterception(true);
  page.on("request", r => {
    r.respond({
      status: 200,

Mathspy

Array.from(document.querySelectorAll(".track-name-wrapper")).map(node => {
  let temp = {}
  temp.name = node.firstElementChild.textContent
  let artistAlbum = node.lastElementChild.querySelectorAll("a")
  temp.artist = {name: artistAlbum[0].textContent, link: artistAlbum[0].href}
  temp.album = {name: artistAlbum[1].textContent, link: artistAlbum[1].href}
  return temp
})

Mathspy

Array.from(document.querySelectorAll("ytd-playlist-video-renderer"))
  .slice(121) //Changes this number to the number of the last video you watched
  .map(x => x.querySelector(".ytd-thumbnail-overlay-time-status-renderer").textContent.trim())
  .reduce((acc, video) => {
    let [h, m, s] = video.split(":").map(x => parseInt(x));
    if (!s) {s = m; m = h; h = 0;}
    acc[0] += h;
    acc[1] += m;
    acc[2] += s;
    return acc;