Trimming input. Fixing my bug where i hardcoded part 2.

day7/main.exs

@@ -2,6 +2,7 @@ defmodule Day7 do
   def run do
     lines =
       File.read!("test.txt")
+      |> String.trim()
       |> String.split("\n")
       |> Enum.map(fn l -> String.split(l, ~r{\D+}) |> Enum.map(&String.to_integer(&1)) end)
       |> Enum.map(fn [head | tail] -> {head, tail} end)
@@ -23,7 +24,7 @@ defmodule Day7 do
       # base case is 2 elements. if any succeed, return true
       [_, _] -> Enum.any?(branches, fn n -> n == total end)
       # recurse by trying each branch, subbing the first 2 elements with the new combined element
-      [_, _ | rest] -> Enum.any?(branches, &valid?({total, [&1 | rest]}, 2))
+      [_, _ | _] -> Enum.any?(branches, &valid?({total, [&1 | rest]}, part))
     end
   end