❓ CHALLENGE #221

const words = ['apple', 'banana', 'cherry'];

const result = words.flatMap(word => word.split('').reverse());

console.log(result);

👩‍💻👩‍💻 The Complete Puppeteer Cheatsheet

If you want to control a headless Chrome browser from Node, Puppeteer is for you. Now we just need a Playwright one as well ;-)

MOHAN GANESAN

❓ CHALLENGE #222

const items = [1, 2, 3, 4, 5];

const result = items.reduce((acc, val) => acc.concat(Array.from({ length: val }, () => val)), []);

console.log(result);

👩‍💻 The Node.js Best Practices List: 2023 Edition

1. You are reading dozens of the best Node.js articles - this repository is a summary and curation of the top-ranked content on Node.js best practices, as well as content written here by collaborators

2. It is the largest compilation

3. Best practices have additional info

YONI GOLDBERG ET AL.

❓ CHALLENGE #223

const words = ['apple', 'banana', 'cherry'];

const result = words.map(word => word.split('').sort().join(''));

console.log(result);

❓ CHALLENGE #224

const data = [
  { id: 1, name: 'Alice', age: 25, gender: 'Female' },
  { id: 2, name: 'Bob', age: 30, gender: 'Male' },
  { id: 3, name: 'Charlie', age: 22, gender: 'Male' },
  { id: 4, name: 'David', age: 35, gender: 'Male' },
];

const result = data
  .filter(person => person.gender === 'Male')
  .map(person => ({ ...person, isSenior: person.age > 30 }))
  .sort((a, b) => a.age - b.age)
  .slice(0, 2)
  .reduce((acc, person) => {
    acc[person.name] = person.isSenior;
    return acc;
  }, {});

console.log(result);

❓ CHALLENGE #225

const data = [1, 2, 3, 4, 5];

const result = data.map(num => Array.from({ length: num }, (_, index) => index + 1));

console.log(result);

🌍 Three.js Procedural Planets

This is gorgeous! You can have a lot of fun adjusting the parameters to change the outcome, or you can spin up and play with your own copy using the source code. If you don’t want to stress out your browser, you can see how it looks ▶️ in this video.

DANIEL GREENHECK

❓ CHALLENGE #226

const data = [1, 2, 3, 4, 5];

const result = data.flatMap(num => Array.from({ length: num * 2 - 1 }, (_, index) => index % 2 === 0 ? num : index + 1));

console.log(result);

😐 You don't need JavaScript for that

“Just because you know something needs JavaScript, doesn’t mean it still does. You can make better websites if you test those assumptions every now and then.”

KILLIAN VALKHOF

🎄Merry Christmas to all the members of our JavaScript community!

P.S. Dear premium Telegram users, this Christmas, the gift is in your hands! Boost us on Telegram for free, and your support becomes the festive present to all of us (it enables features like stories and more). 🌟