Advent of Code 2021

Day 1

"../aoc2021/day1.txt"
|> Path.expand(__DIR__)
|> File.read!()
|> String.split("\n", trim: true)
|> Enum.map(&String.to_integer/1)
|> Enum.chunk_every(2, 1, :discard)
|> Enum.filter(fn [a, b] -> a < b end)
|> length

Day 4

[numbers | boards] =
  "../aoc2021/day1.txt"
  |> Path.expand(__DIR__)
  |> File.read!()
  |> String.split("\n\n", trim: true)

# IO.inspect numbers
numbers |> String.split("\n", trim: true) |> Enum.map(&String.to_integer/1)

boards =
  boards
  |> Enum.map(fn b ->
    b
    |> String.split("\n", trim: true)
    |> Enum.map(fn r -> r |> String.split(" ", trim: true) |> Enum.map(&String.to_integer/1) end)
  end)