Solutions for Advent of Code 2020 (in php)

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Miscellaneous advent-of-code-2021
Overview

Advent of Code 2021 Solutions

Solutions to the 2021 edition of Advent of Code.

Running

Simply php day01.php and so forth should do the trick!

Lessons Learned

Some learned lesson for each day:

  1. Rushing first requires cleanup later.
  2. Many modern languages are very similar.
  3. Bitwise operators require refresher courses.
  4. Mutability can blindside you.
  5. Learning a language as you go makes you slow.
  6. Functional(ish) syntax would be very nice!
  7. Math can be intuitive.
  8. Wisdom lies with the crowd. I am not wise.
  9. TODO
  10. TODO
  11. TODO
  12. TODO
  13. TODO
  14. TODO
  15. TODO
  16. TODO
  17. TODO
  18. TODO
  19. TODO
  20. TODO
  21. TODO
  22. TODO
  23. TODO
  24. TODO
  25. TODO

Compendium Repositories

I've created a browser extension for Google Chrome and Mozilla Firefox. It is open source to spice up your private leaderboard page with graphs if you want to contribute!

In addition, you can also check my previous editions' repositories:

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Comments
  • Improve to more modern PHP

    Improve to more modern PHP

    This PR does the following:

    • Adds some bench mark to validate my improvements (Total improvement is from 1.5s to 1.0s)
    • Use explode vs. preg_split (Improves readability, PHP_EOL is correctly defined for each OS)
    • Use intval as a first class callback (Now when you would refactor the method would be taken into consideration)
    • Add type hints (Because you can)
    • Extracted the count from the loop (Avoids calling the count method 2000 times)
    • Removed overhead in solvePart2 (This saves the majority of time.)
    opened by DannyvdSluijs 1
Owner
Jeroen Heijmans
Software developer, gamer, chef, and e-sports fan from the Netherlands.
Jeroen Heijmans
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