Although container/ring doesn't seem to work how I want, which is to be able to do the following:
1. Jump to value V
2. Move backwards or forwards P places
I think I need a layer on top because there is no built-in function to find a given value.
TIL: Go has a standard library package, container/ring, that lets you create a circular list.
Very useful for Advent of Code when I have to move left or right in a compass direction, which of course wraps around. Saves me having to write a bunch of if/switch statements to handle every possible combination.
Took me a while to find this, after searching for 'clock' and 'wrap around slice'.
A strange package has arrived. Received for my outstanding performance on last year's #AdventOfCode. Except the year is wrong on the shirt :) I suppose it's a prediction for this year's event ;-p
#adventofcode 2015 in C, day 14
Once again, "reading the puzzle incorrectly" is the main source of error here, otherwise very straightforward. We get to add a bit to our parsing toolbox along the way, as a bonus.
One of my fondest memories when doing #AdventOfCode was a time that I just said YOLO and decided to read the input at compile time (w/ macrolet 💅) convert the line into a plist and then expand the plist into the body of a defmethod each rule mapped to a different implementation using eql specifiers.
Yes, it was a bad idea.
Yes, it was inefficient.
But #CommonLisp doesn't care, so I wrote it anyway!
#adventofcode 2015 in C, day 13 again. Copy-pasting from day 9 was working, but a bit too ugly for my taste. So we refactor a bit, make it marginally less ugly, and finish the puzzle easily thanks, for once, to good design choices made at the beginning.
#adventofcode 2015 in C, day 13.
Another graph-like structure, leading to a lot of copy-pasting from day 9.
#adventofcode 2015 in C, day 12: lots of parsing, but also an opportunity to implement a basic stack structure. Nice little puzzle overall.
#adventofcode 2015 in C, day 10 and 11
Both quick and easy, which means that either I've become reasonably good at this C thing, or I'm being lured into a false sense of confidence.
@blinry and I are still trying to solve last year's #adventOfCode. We're stuck on day 10, and we're out of ideas – except using linear optimization algorithms, but that feels like overkill... Has anyone of you solved day 10 and has a tip for us – do we really need to implement linear optimization?
https://en.wikipedia.org/wiki/Linear_programming#Integer_unknowns
Please use a spoiler for your answers ^^'
#AOC25 #advent_of_code #adventofcode2025 #adventofcode2025day10
Paul
Kroppeb
Adrien Foucart
PuercoPop
Piko