❓ CHALLENGE

function recursiveMaxSubarraySum(nums, startIndex = 0, currentSum = 0, maxSum = -Infinity) {
  if (startIndex === nums.length) {
    return maxSum;
  }

  currentSum = Math.max(nums[startIndex], currentSum + nums[startIndex]);
  maxSum = Math.max(currentSum, maxSum);

  return recursiveMaxSubarraySum(nums, startIndex + 1, currentSum, maxSum);
}

const result = recursiveMaxSubarraySum([-2, 1, -3, 4, -1, 2, 1, -5, 4]);

console.log(result);

💥 Questions by roadmap.sh

roadmap.sh is the 6th most starred project on GitHub and is visited by hundreds of thousands of developers every month.

❓ CHALLENGE *

const string = "Lorem ipsum dolor sit amet";

const result = string.split(" ")
                     .map(word => word.toLowerCase())
                     .reduce((acc, word) => {
                       acc[word] = (acc[word] || 0) + 1;
                       return acc;
                     }, {});

console.log(result);

🤟 💚 The Node.js Valentine's Day Security Releases

Security releases had been expected to land in the past week for Node and they’re now here as v21.6.2 (Current), v20.11.1 (LTS), and v18.19.1 (LTS). They include fixes for a variety of vulnerabilities, including some high severity ones involving HTTP-based DoS attacks and privilege escalation.

RAFAEL GONZAGA AND MARCO IPPOLITO

❓ CHALLENGE

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

const result = numbers.filter(num => num % 2 === 0)
                     .map(num => num ** 2)
                     .reduce((acc, val) => acc + val, 0);

console.log(result);

🤩 Tabulator: An Interactive Table and Data Grid Library

Supports all major browsers and can be used with Angular, Vue, and React if you wish. Been around for several years now, but continues to be maintained.

OLI FOLKERD

👀 New mascot ? #nodejs

twitter.com/nodejs
facebook.com/nodejsfoundation

❓ CHALLENGE

const string = "Hello, World! How are you?";

const result = string.match(/[aeiou]/g).reduce((acc, char) => {
  acc[char] = (acc[char] || 0) + 1;
  return acc;
}, {});

console.log(result);

⚠️ Node.js Developers Debate Enabling Corepack by Default and Potentially Unbundling npm

Node developers are wrestling with the decision to enable Corepack (a tool for managing package managers) by default, which has sparked a debate about the possibility of removing npm from the Node.js binary.

SARAH GOODING (SOCKET)

❓ CHALLENGE

const string = "Hello, World! How are you?";

const result = [...string.matchAll(/[aeiou]/g)]
                 .map(match => match[0])
                 .reverse()
                 .join("");

console.log(result);

😱 Labyrinthos.js: A Procedural Generator for Mazes, Etc.

The interactive demo on the homepage will give you the basic idea, but the library implements a variety of algorithms for creating mazes and terrain, including the use of Perlin noise, growing trees, spiral backtracking, and more. GitHub repo.

YANTRA WORKS

❓ CHALLENGE

const string = "open sesame";
const result = string.split(" ").map(word => word.length);
console.log(result);

Meet Rocket Turtle 👋 the new Node.js mascot 🤩