👀 How Marketing Changed OOP in JavaScript

A look at JavaScript’s earliest history and its prototypal nature.

JUAN DIEGO RODRÍGUEZ

❓ CHALLENGE #217

const asyncFunction = async () => {
  const delay = (ms) => new Promise(resolve => setTimeout(resolve, ms));

  const result = await Promise.race([delay(100), delay(500)]);
  return result;
};

asyncFunction().then(value => console.log(value));

❓ CHALLENGE #218

const matrix = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
];

let columnSums = [];

for (let i = 0; i < matrix[0].length; i++) {
  let sum = 0;
  for (let j = 0; j < matrix.length; j++) {
    sum += matrix[j][i];
  }
  columnSums.push(sum);
}

console.log(columnSums);

🤔 Learn How Modern JS Frameworks Work by Building One

Building things is a great way to learn, even if you don’t end up using what you built. Even better is when someone who’s already built something successful introduces you to the process. Nolan doesn’t go super deep but far enough to whet your appetite and for you to learn a few things by taking it further.

NOLAN LAWSON

❓ CHALLENGE #219

const matrix = [
  [1, 2, 3],
  [4, 5, 6],
  [7, 8, 9],
];

let flattenedMatrix = [];

for (let i = 0; i < matrix.length; i++) {
  for (let j = 0; j < matrix[i].length; j++) {
    flattenedMatrix.push(matrix[i][j]);
  }
}

console.log(flattenedMatrix);

👀 Name Checker: Check if a Project Name is Taken

An online tool that checks a bunch of different package registries (npm, GitHub, GitLab, PyPI, Maven, RubyGems, Go packages, Rust crate, etc.) to see if the name is used by another project.

TODD COOKE

❓ CHALLENGE #220

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

const result = data.flatMap(num => [num * 2, num * 3]);

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

❓ 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);