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const insertionSort = arr =>arr.reduce((acc, x) => {if (!acc.length) return [x];acc.some((y, j) => {if (x <= y) {acc.splice(j, 0, x);return true;}if (x > y && j === acc.length - 1) {acc.splice(j + 1, 0, x);return true;}return false;});return acc;}, []);insertionSort([6, 3, 4, 1]); // [1, 3, 4, 6]
const gcd = (...arr) => {const _gcd = (x, y) => (!y ? x : gcd(y, x % y));return [...arr].reduce((a, b) => _gcd(a, b));};gcd(8, 36); // 4gcd(...[12, 8, 32]); // 4
const shuffle = ([...arr]) => {let m = arr.length;while (m) {const i = Math.floor(Math.random() * m--);[arr[m], arr[i]] = [arr[i], arr[m]];}return arr;};const foo = [1, 2, 3];shuffle(foo); // [2, 3, 1], foo = [1, 2, 3]
//Allegedly never tested on the twitter websitefunction scrapeScreen(){let articles = Array.from(document.getElementsByTagName("article"));let results = [];for(let tweet of articles){const isAnAd = Array.from(tweet.querySelectorAll("span")).map((e)=>e.textContent).includes("Ad");if(isAnAd){//console.log(tweet, "is an ad. Skipping...");continue;}const userName = tweet.querySelector("[data-testid='User-Name'] > div:nth-child(2) > div > div")?.textContent;const tweetContent = tweet.querySelector("[data-testid='tweetText']")?.textContent;const timeStamp = tweet.querySelector("time")?.getAttribute("datetime");const tweetLink = tweet.querySelector("time")?.parentElement?.getAttribute("href");if((!userName) || (!tweetContent)) continue;results.push({username: userName,tweetText: tweetContent,timeStamp: timeStamp,tweetLink: tweetLink});}return results;}let scraped = scrapeScreen();setInterval(()=>{scraped = scraped.concat(scrapeScreen().filter((tweet)=>{for(let scrapedTweet of scraped){if(scrapedTweet.username == tweet.username && scrapedTweet.tweetText == tweet.tweetText) return false;}return true;}));}, 500); //Scrape everything on the screen twice a secondwindow.scrollIntervalId = setInterval(function(){window.scrollBy(0, 1000);}, 500); //Scroll for me//http://bgrins.github.io/devtools-snippets/#console-save(function(console){console.save = function(data, filename){if(!data) {console.error('Console.save: No data')return;}if(!filename) filename = 'console.json'if(typeof data === "object"){data = JSON.stringify(data, undefined, '\t')}var blob = new Blob([data], {type: 'text/json'}),e = document.createEvent('MouseEvents'),a = document.createElement('a')a.download = filenamea.href = window.URL.createObjectURL(blob)a.dataset.downloadurl = ['text/json', a.download, a.href].join(':')e.initMouseEvent('click', true, false, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null)a.dispatchEvent(e)}})(console)setTimeout(()=>{clearTimeout(window.scrollIntervalId);delete window.scrollIntervalId;console.save(scraped, "TwitterScrape" + Date.now() + ".json");}, 60 * 1000 * 20); //Twenty minutes
function Welcome(props) {return <h1>Hello, {props.name}</h1>;}function App() {return (<div><Welcome name="Sara" /><Welcome name="Cahal" /><Welcome name="Edite" /></div>);}ReactDOM.render(<App />,document.getElementById('root'));
const kMeans = (data, k = 1) => {const centroids = data.slice(0, k);const distances = Array.from({ length: data.length }, () =>Array.from({ length: k }, () => 0));const classes = Array.from({ length: data.length }, () => -1);let itr = true;while (itr) {itr = false;for (let d in data) {for (let c = 0; c < k; c++) {distances[d][c] = Math.hypot(...Object.keys(data[0]).map(key => data[d][key] - centroids[c][key]));}const m = distances[d].indexOf(Math.min(...distances[d]));if (classes[d] !== m) itr = true;classes[d] = m;}for (let c = 0; c < k; c++) {centroids[c] = Array.from({ length: data[0].length }, () => 0);const size = data.reduce((acc, _, d) => {if (classes[d] === c) {acc++;for (let i in data[0]) centroids[c][i] += data[d][i];}return acc;}, 0);for (let i in data[0]) {centroids[c][i] = parseFloat(Number(centroids[c][i] / size).toFixed(2));}}}return classes;};kMeans([[0, 0], [0, 1], [1, 3], [2, 0]], 2); // [0, 1, 1, 0]