JavaScript

CHALLENGE

const obj = { a: 10 };
console.log(obj.a && obj.b || 20);

✌️ JavaScript performance is weird... Write scientifically faster code with benchmarking Beyond Fireship

CHALLENGE

function memoize(fn) {
  const cache = {};
  return (arg) => cache[arg] ?? (cache[arg] = fn(arg));
}

const square = memoize((n) => n * n);

console.log(square(5)); 
console.log(square(5)); 
console.log(square(6));

🤟 Transformers.js v3: Now You Can Run Transformers in Node.js A JavaScript port of Hugging Face’s transformers Python library that makes it possible to run natural language, vision, and audio machine learning models. v3 adds WebGPU support and now supports Node (plus Deno and Bun) as well as the browser. 1200+ models are ready to run in areas like embeddings, text generation, and speech recognition (as with whisper-small). Hugging Face

CHALLENGE

console.log('A');

setTimeout(() => console.log('B'), 0);

Promise.resolve()
  .then(() => {
    console.log('C');
    return Promise.resolve();
  })
  .then(() => console.log('D'));

console.log('E');

👀 A neat way to find and tidy unused stuff in your projects Knip finds unused files, dependencies and exports in your JavaScript and TypeScript projects. Less code and dependencies lead to improved performance, less maintenance and easier refactorings. webpro-nl

CHALLENGE

console.log(typeof null);
console.log(typeof function () {});

🟠 Svelte 5 is Alive The long awaited next major release of Svelte, the compiler-driven JS UI framework, is the “most significant release in the project’s history”, while remaining largely backwards compatible. A big addition is runes for explicitly declaring reactive state, but there’s much more besides. The official svelte.dev site has also undergone a big rebuild to act as an ‘omnisite’ for all things Svelte. The Svelte Team

CHALLENGE

const obj = {
  value: 10,
  getValue: function () {
    return () => this.value;
  }
};

const value = 20;
const getValue = obj.getValue();
console.log(getValue());

✌️ JavaScript Weekly #710

CHALLENGE

function Animal(name) {
  this.name = name;
}
Animal.prototype.sound = 'Generic sound';

const dog = new Animal('Dog');

Animal.prototype.sound = 'Bark';
console.log(dog.sound);

😉 Build a Sonic Infinite Runner Game Using Kaplay A two hour walkthrough of using the Kaplay game library (formerly known as Kaboom.js) to build a complete, if simple, Sonic-branded game. You can also play it here. JSLegendDev

CHALLENGE

async function test() {
  console.log(1);
  await new Promise(resolve => setTimeout(resolve, 1000));
  console.log(2);
  return 3;
}

console.log(4);
test().then(console.log);
console.log(5);

😎 The world's most loved .NET and game dev IDE jetbrains