adam/AdventOfCode
1
0
Fork 0
Code Issues Pull requests Projects Releases Wiki Activity

Slightly cleaner without capture: :all_but_first for part 2

Browse source
This commit is contained in:
Adam Millerchip 2024-12-03 16:50:47 +09:00
parent 758e5e481e
commit 06ca6eba41
1 changed files with 4 additions and 4 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
2024/day3.exs
View file

@ -7,12 +7,12 @@ defmodule Day3 do
end
def part2(input) do
Regex.scan(~r/mul\((\d+),(\d+)\)|(do\(\))|(don't\(\))/, input, capture: :all_but_first)
Regex.scan(~r/mul\((\d+),(\d+)\)|do\(\)|don't\(\)/, input)
|> Enum.reduce({0, :process}, fn
["", "", "do()"], {sum, _} -> {sum, :process}
["", "", "", "don't()"], {sum, _} -> {sum, :skip}
["do()"], {sum, _} -> {sum, :process}
["don't()"], {sum, _} -> {sum, :skip}
_, {sum, :skip} -> {sum, :skip}
[a, b], {sum, :process} -> {sum + String.to_integer(a) * String.to_integer(b), :process}
[_, a, b], {sum, :process} -> {sum + String.to_integer(a) * String.to_integer(b), :process}
end)
|> elem(0)
end