advent-of-code-2024

https://adventofcode.com/2024

🎅 🎄 🎁 🎅 🎄 🎁 🎅 🎄 🎁 🎅 🎄 🎁 🎅 🎄 🎁 🎅 🎄 🎁

Rules

• Typescript
• 0 dependencies, except for tooling like Typescript and Eslint
• No AI
• Take it easy. No ambition to solve everything or to score on the leaderboard, just having fun when I have time (Unlike 2022 when I grinded through all 25 puzzles)

Progress

1. Solution ⭐⭐
2. Solution ⭐⭐
3. Solution ⭐⭐
4. Solution ⭐⭐
5. Solution ⭐⭐
6. Solution ⭐⭐
7. Solution ⭐⭐
8. Solution ⭐⭐
9. Solution ⭐⭐
10. Solution ⭐⭐
11. TBD
12. Solution ⭐
13. Solution ⭐
14. Solution ⭐⭐
15. Solution ⭐
16. Solution ⭐⭐
17. TBD
18. TBD
19. TBD
20. TBD
21. TBD
22. TBD
23. TBD
24. TBD
25. TBD

Learnings

Read the challenges carefully

Solving the wrong problem is a big waste of time!

The challenges give us free tests cases

Use those exact ones in unit tests

Sorting number in JS

[11, 2].sort() does NOT yield [2, 11] - They get sorted by their first digit. Need to do [11, 2].sort((a, b) => a - b)

Being able to isolate/skip test cases is important when debugging

Yes, looking at you, Node test runner! Why is this such a pain with you?

Ensure clean input data

Make sure the test data does not have an empty extra line at the end, or consider those when parsing. When testing the parsing, use if possible the real input files and not inline strings, as they might be missing small details like that additional empty extra line.

Related to this, make sure to use LF line endings! Actually had a couple of bugs in some of the parsing functions due to CRLF being used instead of LF. Unfortunately, prettier can not parse .txt files, so we also added an .editorconfig just for line endings.

Installation

# expected: 22.x.x
node -v
# otherwise, install
nvm install 22
nvm use 22

# install dependencies
npm i

Development

# run all days
npm run aoc
# run a specific day
npm run aoc day=1
# run in watch mode
npm run aoc watch
# run only tests marked as only
npm run aoc only

# run all validations
npm run validate

Merry christmas

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