Hyperlinks
Highlights
- Nothing too extraordinary with right now’s downside. For the second half, I began by solely checking to see if both endpoint of 1 elf was throughout the endpoints of the opposite elf. Truthfully, I nonetheless cannot determine why this did not work, and I needed to do the identical examine within the different route. Perhaps it would come to me in some unspecified time in the future right now.
defmodule Day04 do
use AOC
def part1 do
enter(4)
~> String.break up("n")
~> Enum.map(fn pair ->
ends = Regex.named_captures(~r/(?<l1>.*)-(?<h1>.*),(?<l2>.*)-(?<h2>.*)/, pair)
~> Map.new(fn {key, worth} -> {String.to_atom(key), String.to_integer(worth)} finish)
(ends.l1 <= ends.l2 && ends.h1 >= ends.h2) ||
(ends.l2 <= ends.l1 && ends.h2 >= ends.h1)
finish)
~> Enum.depend(&Perform.id(&1))
finish
def part2 do
enter(4)
~> String.break up("n")
~> Enum.map(fn pair ->
ends = Regex.named_captures(~r/(?<l1>.*)-(?<h1>.*),(?<l2>.*)-(?<h2>.*)/, pair)
~> Map.new(fn {key, worth} -> {String.to_atom(key), String.to_integer(worth)} finish)
(ends.l1 >= ends.l2 && ends.l1 <= ends.h2) ||
(ends.h1 >= ends.l2 && ends.h1 <= ends.h2) ||
(ends.l2 >= ends.l1 && ends.l2 <= ends.h1) ||
(ends.h2 >= ends.l1 && ends.h2 <= ends.h1)
finish)
~> Enum.depend(&Perform.id(&1))
finish
finish