From c7ebb34f8f105688a963944505b28d5a8a699d6f Mon Sep 17 00:00:00 2001
From: sterni <sternenseemann@systemli.org>
Date: Tue, 14 Dec 2021 01:13:28 +0100
Subject: refactor(sterni/aoc/2021): use a fold instead of last scan element

We can use the reverse swap trick to get a forward fold.

Change-Id: I88185e2ff0b41ec1454f414db2d24b1c8173ac2d
---
 users/sterni/exercises/aoc/2021/solutions.bqn | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/users/sterni/exercises/aoc/2021/solutions.bqn b/users/sterni/exercises/aoc/2021/solutions.bqn
index 1810fc316b..443dd61a01 100755
--- a/users/sterni/exercises/aoc/2021/solutions.bqn
+++ b/users/sterni/exercises/aoc/2021/solutions.bqn
@@ -237,7 +237,7 @@ day13Folds ← ParseFolds 1 ⊑ day13Input
 
 # part 2
 
-PerformAllFolds ← {(-1)⊸⊑(<𝕩) {(𝕨 _Fold)´𝕩}` 𝕨}
+PerformAllFolds ← {𝕩 {(𝕨 _Fold)´𝕩}˜´ ⌽𝕨}
 DotMatrix ← {
   ⟨width, height⟩ ← 1+⌈´𝕩
   {𝕩? '█';' '}¨ height‿width⥊≠¨⊔((⊣+(width⊸×)∘⊢)´)¨ 𝕩
-- 
cgit 1.4.1