JavaScript

🤟 Node.js weekly #​554

CHALLENGE

const arr = [1, 2, 3];
const copy = [...arr];
copy.push(4);

console.log(arr);
console.log(copy);

🤟 Why Code Security Matters - Even in Hardened Environments A nicely diagrammed deep dive (and it really is deep) into a technique that allows malicious parties to turn a file write vulnerability in a Node app into a remote code execution exploit even when the file system is mounted read-only. Stefan Schiller (Sonar)

CHALLENGE

async function test() {
  return (await Promise.resolve(0)) || 10;
}

test().then(console.log);

🫡 Faker 9.1: Generate Fake, Realistic Data on Demand Names, bios, addresses, zip codes, dates, monetary amounts, transactions, and a lot more besides. I really like the guided DevTools console based demo you can try – an idea other projects should consider. GitHub repo. Faker.js Team

CHALLENGE

const obj = { value: 10 };
const result = (obj.value += 5) && obj.value;
console.log(result);

🌲 Tinybench 3.0: A Tiny, Simple Benchmarking Library Uses whatever precise timing capabilities are available (e.g. process.hrtime or peformance.now). You can then benchmark whatever functions you want, specify how long or how many times to benchmark for, and get a variety of stats in return. GitHub repo. Tinylibs

CHALLENGE

const factorial = (function () {
  const cache = {};
  return function inner(n) {
    if (n in cache) return cache[n];
    return (cache[n] = n <= 1 ? 1 : n * inner(n - 1));
  };
})();

console.log(factorial(5)); 
console.log(factorial(5));

🌪 Python Jumps to #1 on GitHub Over JavaScript, But... GitHub Universe took place this week, flooding us with data about how folks are using the platform. Of interest to those on social media was that Python has taken JavaScript's #1 language crown, though many argued that TypeScript (now #3) made an impact here. In positive news, JS still ranks first for code pushes alone and there's been a 15% jump in npm package consumption in the past year. GitHub

CHALLENGE

function Person(name) {
  this.name = name;
  this.sayName = () => console.log(this.name);
}

const person1 = new Person('David');
const person2 = { name: 'Not David', sayName: person1.sayName };

person2.sayName();

CHALLENGE

const a = false || 0 || "" || null || "JavaScript";
console.log(a);

✌️ JavaScript weekly #​711