advent-of-code-2021

I am doing this to get more comfortable with Go. It's not perfect, and I compare my answers to others (though primarily with coworkers and friends and Reddit if I think my coding was subpar) after I've completed the puzzle.

Running

To try a day from the root of this repository, run

go run <dayXX> <1|2>

Each folder is its own module with a main.go that takes either a '1' or '2' and runs the corresponding part.

Notes

In spite of trying to learn Go, I got pretty familiar with bash

For starters, I created a script that got private leaderboard times and initially had shell scripts to run modules from a parent directory and copy/paste module templates. Then I got to the point where I learned about workspaces and started moving things over with

# Removed the run script I use to have, since workspaces allow me to do `go run dayXX`
# Just needed to change inputs in each of my module files
$ for i in $(git grep -l inputs/ | xargs -i echo {} | cut -d'/' -f1 | uniq); do sed -i "s|inputs/input1.txt|$i/inputs/input1.txt|g" $i/lib/*; done

# Removed the replace script I use to have after I set up the templating for all the following days
$ for day in 0{8..9} {10..25}; do cp -r dayXX day${day}; done
$ for day in 0{8..9} {10..25}; do ./replace dayXX day${day} day${day}/; done

Notable Progression

• Early days were just learning syntax and how to use external libraries (and realizing Go doesn't have built in sets/stacks)
• Day 7 is when I created a tree and is really the first time implemented a sort of class like thing in Go
• Day 11 was interesting; learned structs generally copy when being assigned to another variable or looping with the range keyword; to avoid this, we can use & and index into the array with a traditional loop, respectively. Also learned that closures are a thing
• AoC 2022 started to have hands day 16; my part 1 code didn't even work on the example but gave me the right answer