Advent of code - Day 3

Are you participating in the Advent of code this year?

If you don't know what the advent of code is, it's a website where you'll find a daily challenge (every day it gets harder). It's a really fun event, you should participate!

I try to solve the exercises using either JavaScript or TypeScript and will share my solutions daily (with one day delay so no one can cheat!). I only share the solution for the second part.

Here is my solution for day #3:

[
  [1, 1],
  [3, 1],
  [5, 1],
  [7, 1],
  [1, 2],
]
  .map(
    ([RIGHT, DOWN]) =>
      $('body > pre')
        .textContent.split(/\r?\n/)
        .filter(Boolean)
        .filter((_, index) => index % DOWN === 0)
        .filter((value, index) => value[(index * RIGHT) % value.length] === '#').length,
  )
  .reduce((acc, v) => acc * v, 1)

Feel free to share yours in the comments!

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Photo by Markus Spiske on Unsplash