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Reflection 2021.md

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Reflection

Day 01

  • Just a bit rusty on kotlin it seems

Day 02

Intellij managed to hurt a lot today. Although after checking the recording it seems I wouldn't have gotten any points anyway. However, stuff like this needs to be avoided in the future. My assumption is that Intellij didn't notice the file had been changed.

  • Create download script.
    • Download the file
    • Force copy it to the out folder to bypass IntelliJ
    • Make it run automatically, or delay until after 6:00:01 am so that I don't have to alt tab to bash to run it
  • The current way of io and stuff hurts Copilot, look into a better way of io.

Day 03

Intellij managed to hurt a lot today again, due to the input files of last year still being in the output directory. They have been cleared

  • Should've used getDigitLines() instead of getLines()
  • make checklist for things to do before the contest

Day 04

YYYEEEEEESSS, Got some point (19) =p

  • Accidentally opened the question in a new tab, caused me some issues
  • So I knew I had a getInts function, but it was not working.

Day 05

59 points, 184th place

  • add getPoint like getInts?
  • add short splitOnEmpty
  • add short form for creating sets and maps
  • add short for first() and last()
  • add Line (and SteppedLine) class which is iterable

Day 06

76 points, 122nd place

  • shorts for IntArray/LongArray?

Day 07

22 points, 118th place

  • The used theme was hiding the root cause of a compiler error

Day 08

no points, 127th place

  • Had some trouble understanding the input
  • Forgot 0 existed

Day 09

no points, 140th place

  • If I had realised that I could pad the sides with 9 or 10 sooner, it would've been much faster to solve the problem.
  • grids
  • maybe add 2d filter for a grid, including a partial centered one
  • multidimensional toMutable lists etc
  • implies
  • shortcut to enable/disable copilot
  • for part 2, a repeat(1000) would have been enough, and less error prone

Day 10

no points, 153rd place

  • lol bracketstack
  • should've copied the points table into a comment before making the points map
  • Oh, I really wish we had for else loops in kotlin

Day 11

no points, 162nd place

  • look into grids again
  • mapSelf to mutate a map in place (and multidimensional)

Day 12

no points, 168th place

  • didn't save the parsed data immediately
  • graphs, eg from adjancency list
    • path type
  • short type names for mutable types

Day 13

no points, 181st place

  • Should have worked on the coordinates instead of an actual grid

Day 14

  • add splitOnEmpty, short for splitOn{it.isEmpty()}
  • check the full checklist before the day
  • Thinking that all I had to do was switch from ints to longs was dumb as you can never need to have a long for the count of items in a list, cause that would imply you had an oom error.

Day 15

  • Look into the current path stuff/add quick and easy path helpers

Day 16

/shrug

Day 17

Day 18

WTF