Advent of Code 2023 Day 1 Part 1

Mix.install([
  {:kino_aoc, "~> 0.1"}
])

Get Inputs

{:ok, puzzle_input} =
  KinoAOC.download_puzzle("2023", "1", System.fetch_env!("LB_SESSION"))

My answer

puzzle_input
|> String.split("\n")
|> Enum.map(fn line ->
  digits = Regex.scan(~r/[0-9]/, line)
  first = digits |> hd() |> hd()
  last = digits |> Enum.reverse() |> hd() |> hd()
  String.to_integer(first <> last)
end)
|> Enum.sum()