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authorsterni <sternenseemann@systemli.org>2021-12-14T00·13+0100
committersterni <sternenseemann@systemli.org>2021-12-14T13·41+0000
commitc7ebb34f8f105688a963944505b28d5a8a699d6f (patch)
treef86ba5844ab36101c28ac9748844a1b075f29167 /users/sterni
parent6842e25f14a463d0f7e7ad7d9ebe700a7efabb7a (diff)
refactor(sterni/aoc/2021): use a fold instead of last scan element r/3238
We can use the reverse swap trick to get a forward fold.

Change-Id: I88185e2ff0b41ec1454f414db2d24b1c8173ac2d
Diffstat (limited to 'users/sterni')
-rwxr-xr-xusers/sterni/exercises/aoc/2021/solutions.bqn2
1 files changed, 1 insertions, 1 deletions
diff --git a/users/sterni/exercises/aoc/2021/solutions.bqn b/users/sterni/exercises/aoc/2021/solutions.bqn
index 1810fc316b4b..443dd61a01a4 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