Don’t know why the regex ~r/[\W && [^\.]]/x does not work in Elixir. It works pretty well in Ruby. Anyway, here is my solution: https://github.com/Aetherus/advent-of-code/blob/master/2023/day-03.livemd

Wow this one. Not a dataset I’d like to traverse at midnight. But I love LiveBook. I really do. defmodule AdventOfCode.Y2023.Day03 do alias AdventOfCode.Helpers.{InputReader, Transformers} def input, do: InputReader.read_from_file(2023, 3) def run(input \\ input()) do input = parse(inpu…

This one took me two hours continuously to get working. contains_symbol = fn s -> match = Regex.match?(~r/[^\d.]/, s) match end grab_numbers = fn line -> Regex.scan(~r/\d+/, line, return: :index) |> Enum.map(fn [{index, len}] -> {index, len, line |> String.slice(index, len) |> Integer.…

I’m not proud of this code, but hey, it works and it’s fast. https://github.com/mexicat/aoc-2023/blob/main/lib/aoc/day_03.ex

I got tripped up on an off-by-one error with my ranges in part 1. That’s what I get for staying up late to do this one. https://github.com/midouest/advent-of-code-2023/blob/main/notebooks/day03.livemd

Not super happy about that one, I guess the parser emission could’ve been more elegant https://github.com/aerosol/aoc/blob/main/lib/advent_of_code/day_03.ex

Performance of list_adjecent_numbers is bad but it works… :upside_down_face: https://github.com/pehbehbeh/adventofcode/blob/main/2023/03.livemd

My beginner’s solution, Day 3 part 1. My focus was on readability. How I did? defmodule Day03 do def part1(input) do # " 467.. # ...*. # ..35 " schematic = input |> String.split("\n") |> Enum.map(&String.graphemes/1) # [ ["4", "6", "7", ".", "."], # [".", "."…

Preprocessing: defmodule Day03 do def parse_line("", {_, _, acc}), do: acc def parse_line("." <> rest, {x, y, acc}), do: parse_line(rest, {x + 1, y, acc}) def parse_line(<<c>> <> _ = str, {x, y, items}) when c in ?0..?9 do {num, rest} = Integer.parse(str) len = floor(:math.log10(num)…

My solution: https://github.com/bjorng/advent-of-code-2023/blob/main/day03/lib/day03.ex

https://github.com/viniciusmuller/aoc2023/blob/main/day3/day03.exs

Advent of Code 2023 - Day 3

Learning Resources Coding Challenges

al2o3cr December 8, 2023, 4:16am 23

+1 for this - it’s my favorite part of AoC.

With “real-world” problems, it usually takes months or years to fully regret an architectural decision - with an AoC problem, all it takes is part 2