👩‍💻 Worlds smallest Docker Image - aka WSDI | 92 bytes

If you ever wondered what is the minimal Docker image in the world, then you are in right place. Is it debian, is it alpine or busybox ? ...

dooqod

❓ CHALLENGE

function asyncOperation() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Async operation completed!');
    }, 2000);
  });
}

const asyncOperationWithTimeout = Promise.race([asyncOperation(), new Promise((_, reject) => setTimeout(() => reject('Timeout!'), 1000))]);

asyncOperationWithTimeout
  .then(result => console.log(result))
  .catch(error => console.log(error));

❓ CHALLENGE

function fetchData() {
  return new Promise((resolve, reject) => {
    setTimeout(() => {
      resolve('Data fetched successfully!');
    }, 1000);
  });
}

async function getResult() {
  const result = await fetchData();
  console.log(result);
}

getResult();

👩‍💻 Essential JavaScript Design Patterns

There are numerous programming design patterns that you’ve likely used, but you’re not aware of them...

NAIRIHAR

❓ CHALLENGE

const data = [
  { id: 1, name: 'Alice', skills: ['JavaScript', 'HTML'] },
  { id: 2, name: 'Bob', skills: ['JavaScript', 'CSS'] },
  { id: 3, name: 'Charlie', skills: ['HTML', 'CSS'] },
];

const result = data.reduce((acc, person) => {
  person.skills.forEach(skill => {
    acc[skill] = acc[skill] ? acc[skill] + 1 : 1;
  });
  return acc;
}, {});

console.log(result);

👩‍💻 qnm: A CLI Tool to Look Into node_modules

If you’ve ever gone into node_modules and been overwhelmed, this tool, supporting both npm and Yarn, lets you dig around with some guidance as to what is what. You can use fuzzy search to find specific things and also see which modules are using the most space.

RAN YITZHAKI

❓ CHALLENGE

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

const result = data.reduce((acc, val) => acc.concat(Array.from({ length: val }, (_, index) => val + index)), []);

console.log(result);

❓ CHALLENGE

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

const result = data.flatMap(num => Array(num).fill(num * 2));

console.log(result);

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❓ CHALLENGE

const data = [
  { id: 1, name: 'Alice', age: 25, gender: 'Female' },
  { id: 2, name: 'Bob', age: 30, gender: 'Male' },
  { id: 3, name: 'Charlie', age: 22, gender: 'Male' },
  { id: 4, name: 'David', age: 35, gender: 'Male' },
];

const result = data.filter(person => person.gender === 'Male').map(person => person.age).reduce((acc, age) => acc + age, 0);

console.log(result);

👩‍💻 Table of Contents: Build your own X

This repository is a compilation of well-written, step-by-step guides for re-creating our favorite technologies from scratch.

codecrafters-io

❓ CHALLENGE

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

const result = numbers.reduce((acc, num) => {
  if (num % 2 === 0) {
    acc.even += num;
  } else {
    acc.odd *= num;
  }
  return acc;
}, { even: 0, odd: 1 });

console.log(result);