JavaScript

😐 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

❓ 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);

🌍 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 #225

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

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

console.log(result);

🪐 The Await Event Horizon in JavaScript You know someone’s getting heavy when they start a JavaScript article by talking about the event horizon around black holes and how “a similar boundary exists around every JavaScript Promise.” Enjoy. CHARLES LOWELL

❓ 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 #223

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

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

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 #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 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 #221

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

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

console.log(result);

👩‍💻👩‍💻 Maglev: A Serious Look at V8’s Fastest Optimizing JIT A deep dive into how the V8 JavaScript engine (as used in Node) is getting faster thanks to work on its Maglev JIT compiler which sits in between the existing Sparkplug and TurboFan compilers (which offer distinct compilation vs execution speed tradeoffs). THE V8 TEAM