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const arithmeticProgression = (n, lim) =>Array.from({ length: Math.ceil(lim / n) }, (_, i) => (i + 1) * n );arithmeticProgression(5, 25); // [5, 10, 15, 20, 25]
const longestPalindrome = (s) => {if(s.length === 1) return sconst odd = longestOddPalindrome(s)const even = longestEvenPalindrome(s)if(odd.length >= even.length) return oddif(even.length > odd.length) return even};const longestOddPalindrome = (s) => {let longest = 0let longestSubStr = ""for(let i = 1; i < s.length; i++) {let currentLongest = 1let currentLongestSubStr = ""let left = i - 1let right = i + 1while(left >= 0 && right < s.length) {const leftLetter = s[left]const rightLetter = s[right]left--right++if(leftLetter === rightLetter) {currentLongest += 2currentLongestSubStr = s.slice(left+1, right)} else break}if(currentLongest > longest) {if(currentLongestSubStr) longestSubStr = currentLongestSubStrelse longestSubStr = s[i]longest = currentLongest}}return longestSubStr}const longestEvenPalindrome = (s) => {let longest = 0let longestSubStr = ""for(let i = 0; i < s.length - 1; i++) {if(s[i] !== s[i+1]) continue;let currentLongest = 2let currentLongestSubStr = ""let left = i - 1let right = i + 2while(left >= 0 && right < s.length) {const leftLetter = s[left]const rightLetter = s[right]left--right++if(leftLetter === rightLetter) {currentLongest += 2currentLongestSubStr = s.slice(left+1, right)} else break}if(currentLongest > longest) {if(currentLongestSubStr) longestSubStr = currentLongestSubStrelse longestSubStr = s[i] + s[i+1]longest = currentLongest}}return longestSubStr}console.log(longestPalindrome("babad"))
//Disclaimer: I do not condone mass web scraping of ESPN websites, and this is just theoretical code that hasn't been used.//Scrape player stats off of https://www.espn.com/nfl/team/roster/_/name/phi/philadelphia-eagles//Example player JS object/*{"shortName": "S. Opeta","name": "Sua Opeta","href": "http://www.espn.com/nfl/player/_/id/3121009/sua-opeta","uid": "s:20~l:28~a:3121009","guid": "dec19157-e984-f981-3724-498281328c97","id": "3121009","height": "6' 4\"","weight": "305 lbs","age": 27,"position": "G","jersey": "78","birthDate": "08/15/96","headshot": "https://a.espncdn.com/i/headshots/nfl/players/full/3121009.png","lastName": "Sua Opeta","experience": 4,"college": "Weber State"}*///The page needs to be focused, so you have to put this code in a bookmarklet and click the page before clicking it. Allegedly.navigator.clipboard.writeText(JSON.stringify(window["__espnfitt__"].page.content.roster.groups.flatMap((group)=>{return group.athletes.map((athlete)=>{//We can assume all football players are above 100 lbs and below 1000 lbs.athlete.weight = parseInt(athlete.weight.substring(0,3));if(athlete.experience == "R") athlete.experience = 0;else athlete.experience = parseInt(athlete.experience);//We can assume players are at least 1 foot, or under 10 feet tall.athlete.inches = 12 * parseInt(athlete.height.substring(0, 1)); //Add feet in inchesathlete.inches += parseInt(athlete.height.substring(2).replaceAll("\"", "").trim()); //Add remaining inchesconst monthDayYear = athlete.birthDate.split("/");athlete.birthMonth = parseInt(monthDayYear[0]);athlete.birthDay = parseInt(monthDayYear[1]);athlete.birthYear = parseInt(monthDayYear[2]);//The only really useful stuff we get from this is Height, weight, left handedness, age, position, and birthdayreturn athlete;});}), null, "\t")).then(null, ()=>{alert("That failed.")});//Changes all the team links on this page https://www.espn.com/nfl/stats/team to the team's roster for easier scraping$$("table > tbody > tr > td > div > div > a").forEach((elm)=>{elm.setAttribute("href", elm.getAttribute("href").replace("team/", "team/roster/"));});
export const Main = () => {const [title, setTitle] = useState('');return (<ChildComponenttitle={title}onChange={e => setTitle(e.target.value)}/>);};export const ChildComponent = ({ title, onChange }) => {return (<Box component="form" onSubmit={() => {}} noValidate mt={5}><TextFieldfullWidthid="title"label="Title"name="title"autoComplete="title"autoFocuscolor="primary"variant="filled"InputLabelProps={{ shrink: true }}value={title}onChange={onChange}/></Box>);};
const luhnCheck = num => {let arr = (num + '').split('').reverse().map(x => parseInt(x));let lastDigit = arr.splice(0, 1)[0];let sum = arr.reduce((acc, val, i) => (i % 2 !== 0 ? acc + val : acc + ((val *= 2) > 9 ? val - 9 : val)),0);sum += lastDigit;return sum % 10 === 0;};luhnCheck('4485275742308327'); // trueluhnCheck(6011329933655299); // trueluhnCheck(123456789); // false
// promisify(f, true) to get array of resultsfunction promisify(f, manyArgs = false) {return function (...args) {return new Promise((resolve, reject) => {function callback(err, ...results) { // our custom callback for fif (err) {reject(err);} else {// resolve with all callback results if manyArgs is specifiedresolve(manyArgs ? results : results[0]);}}args.push(callback);f.call(this, ...args);});};}// usage:f = promisify(f, true);f(...).then(arrayOfResults => ..., err => ...);