These are my solutions for the puzzles in the Advent of Code 2022.
If you are not familiar with Advent of Code: the solutions are not meant to represent best-practices or best-performant code - the goal is solve the puzzles in a timely manner.
I started making the solutions in Javascript (folder /javascript), until day 4.
Then I switched to Typescript, as I thought it would be beneficial for the more difficult challenges (folder /typescript).
When both files are present (e.g. days 1 to 4), the Typescript files in the repo are not the transpilation of the javascript files. They are refactored versions of the initial Javascript solutions.
These is a summary in no particular order of some lessons learned or traps that I fell for during the puzzles. Lots of debugging!
> Multiplication and substraction are non-commutative.
You need to parse text to form a simple arithmethic expression (dddd: xxx + yyyy). Part 1 of the puzzle was simple, but one approach to solve part 2 required "reversing" the operations. Here not paying attention to
the non-commutative nature of * and - has cost me a lot of time debugging.
Other concepts in this puzzle: https://en.wikipedia.org/wiki/Tree_traversal#Pre-order,_NLR