defmodule Day06 do def part1(input) do input |> Enum.map(fn line -> line |> String.split(" ", trim: true) |> Enum.map(fn token -> case Integer.parse(token) do :error -> String.to_atom(token) {n, ""} -> n end end) end) |> t…

I’m using my Array module again: Array.col returns a column as a list, Array.subarray returns a subarray with given indexes, and Array.from_list is a constructor that takes a list of lists. defmodule Y2025.Day06 do def parse_lines(s), do: s |> String.trim() |> String.split("\n") |> Enum.split(-1)…

#!/usr/bin/env elixir # Advent of Code 2025. Day 6 defmodule M do def i("*"), do: "*" def i("+"), do: "+" def i(x), do: String.to_integer(x) def n(a,b,c,d) do [a,b,c,d] |> Enum.reject(& &1 == " ") |> Enum.map(&String.to_integer/1) |> Integer.undigits() end end # Part 1 …

Setup {tasks, [ops]} = puzzle_input |> String.split("\n", trim: true) |> Enum.split(-1) ops = ops |> String.split() |> Enum.map(&String.to_atom/1) Part 1 tasks |> Enum.map(&String.split/1) |> Enum.zip_with(fn numbers -> Enum.map(numbers, &String.to_integer/1) end) |> Enum.zip(ops) |> E…

Arf I wish I had thought to use String.to_integer before chunking! defmodule AdventOfCode.Solutions.Y25.Day06 do alias AoC.Input # No separate parsing today :) def parse(input, _), do: input def part_one(input) do input |> Input.stream!(trim: true) |> Stream.map(&String.split(&…

I don’t love the code I wrote today - all the work was in parsing the input into the shape I wanted. Lots of string manipulations, list transposing, and messy stuff. https://github.com/sevenseacat/advent_of_code/blob/main/lib/y2025/day06.ex Also, this is the first time this year I’ve been confused…

Same comment. Most of the job is done in the parsing, accumulate data in Map, to get a data structure that makes the main algorithm I simple. But I still wonder how to make it nice. defmodule AdventOfCode.Solution.Year2025.Day06 do import Enum, only: [with_index: 1, reduce: 3, sum: 1, take: 2] …

Anyone else feel there was little “fun” in todays problem? I enjoy problems when there is a challenging data structure or algorithmic obstacle to surmount. This seemed like a lot of persnickety busywork. defmodule RAoc.Solutions.Y25.Day06 do alias AoC.Input # Parts 1 and 2 have their own parse…

Yeah, as I have a time limit I only made Part 1, Part 2 I only drafted in pseudo code: taking largest number in a row (A), then chunk the 'row string’ with number A to have the numbers including whitespace. From there on it’s just ‘grid’ing again. Part 1 def parse(input, _part) do Input.read…

Reading the second problem on the iPhone makes it more challenging to understand how their math works… (see the alignment of numbers) [IMG_8672]

I don’t use elixir much, mainly just learning for some hobby projects I have in mind, but I like doing these puzzles as I learn about functions I don’t use or know much and it’s just a different way of thinking stringing things together in pipelines. I kind of enjoyed the parsing challenge in the se…

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Advent of Code 2025 - Day 6

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hauleth December 7, 2025, 9:04pm 20

Enum.product(list)