shorter xor

2020-12-02 11:00:12 -06:00 · 2020-12-02 11:00:12 -06:00 · e1171830b9
parent aa78a1b463
commit e1171830b9
1 changed files with 1 additions and 1 deletions
--- a/02/02.exs
+++ b/02/02.exs
@ -31,7 +31,7 @@ list
 	fn {p1, p2, character, password} ->
 		first = Enum.at(password, p1-1) == character
 		second = Enum.at(password, p2-1) == character
-		(first and !second) or (!first and second)
+		first != second # exclusive or is equivalent to two things not matching (not both true or both false)
 	end
 )
 |> Enum.count()