CHALLENGE ❓

let x = 5;
let result = typeof (x + "10");

console.log(result);

🗣️ Why is it called a REST API when it wakes me up at 3 AM to fix it?

Zach Wilson

❓ CHALLENGE

function foo() {
    let a = b = 0
    a++
    return a
}
 
foo()
console.log(typeof a)
console.log(typeof b)

🌲 Node.js: The Documentary | An origin story

Honeypot

❓ CHALLENGE

const obj = {
  a: 1,
  b: function() {
    console.log(this.a);
  }
};
const func = obj.b;
func();

❓ CHALLENGE

function* generator() {
  yield 1;
  yield 2;
  yield 3;
}
const gen = generator();
console.log(gen.next().value);
console.log(gen.next().value);

🤟 __dirname is Back in Node with ES Modules

In an ES module, instead of using __dirname or __filename, you can now use import.iss.oneta.dirname and import.iss.oneta.filename (this came with Node 20.11.0 (LTS) released in January).

PHIL NASH

❓ CHALLENGE

const a = { a: 1 };
const b = Object.assign({}, a);
b.a = 2;
console.log(a.a);

✌️ Optimizing Javascript for fun and for profit

Interesting benchmarks 🍊

romgrk

❓ CHALLENGE

const a = [1, 2, 3];
const b = a.slice(0, 2).push(4);
console.log(b);

✌️ JavaScript Visualized: Promise Execution

A helpful diagrammed and animated article, coupled with an (optional) 8-minute video, that goes into how promises work and are scheduled behind the scenes. It’s useful to have a good mental model of these mechanics, given promises form the basis of asynchronous functions in JavaScript.

LYDIA HALLIE

❓ CHALLENGE

const a = [1, 2, 3];
const b = a.flatMap(x => [x, x * 2]);
console.log(b);