Advent of Code - Day 3

NobbZ · December 3, 2018, 11:19am

Note by the Moderators: This topic is to talk about Day 3 of the Advent of Code.

For general discussion about the Advent of Code 2018 and links to topics of the other days, see this topic.

And day 3 is solved as well.

On my VM in the office both parts take about 1 to 1.25 seconds. Thats OK for me today. But the first iteration I used to get the actual solutions has some repitions in it, which I do not like.

I really have to iterate on those, and perhaps I’ll be even able to get them more efficient?

gitlab.com/NobbZ/aoc_ex

lib/y2018/d3.ex

master

defmodule AocEx.Y2018.D3 do
  use AocEx.Boilerplate,
    transform: fn raw ->
      raw
      |> String.split("\n")
      |> Enum.map(&String.split/1)
      |> Enum.map(fn ["#" <> id, "@", coord, size] ->
        id = String.to_integer(id)

        coord =
          coord
          |> String.trim(":")
          |> String.split(",")
          |> Enum.map(&String.to_integer/1)
          |> List.to_tuple()

        size =
          size
          |> String.split("x")
          |> Enum.map(&String.to_integer/1)

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