From 7710d829454a18c766ddc46e7a8f8de3c789e6f9 Mon Sep 17 00:00:00 2001
From: Julius de Jeu <julius@voidcorp.nl>
Date: Tue, 14 Dec 2021 09:06:01 +0100
Subject: [PATCH] Some small updates

---
 src/day13.rs | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/day13.rs b/src/day13.rs
index 62c540b..02ed8dc 100644
--- a/src/day13.rs
+++ b/src/day13.rs
@@ -43,11 +43,11 @@ impl Day for Day13 {
     fn part1(&self) -> anyhow::Result<String> {
         let fold = self.folds[0];
         let map = self.points.clone();
-        Ok(format!("{}", flip(map, fold).len()))
+        Ok(format!("{}", flip(map, &fold).len()))
     }
 
     fn part2(&self) -> anyhow::Result<String> {
-        let r = self.folds.iter().fold(self.points.clone(), |a, &b| flip(a, b));
+        let r = self.folds.iter().fold(self.points.clone(), flip);
         let max_x = r.iter().max_by(|&(xm, _), &(xn, _)| xm.cmp(xn)).ok_or_else(|| anyhow::Error::msg("X is empty!"))?;
         let max_y = r.iter().max_by(|&(_, xm), &(_, xn)| xm.cmp(xn)).ok_or_else(|| anyhow::Error::msg("Y is empty!"))?;
         let mut z = String::new();
@@ -65,8 +65,8 @@ impl Day for Day13 {
     }
 }
 
-fn flip(set: HashSet<(i32, i32)>, f: Fold) -> HashSet<(i32, i32)> {
-    set.iter().map(|&e| flip_one(e, f)).collect()
+fn flip(set: HashSet<(i32, i32)>, f: &Fold) -> HashSet<(i32, i32)> {
+    set.iter().map(|&e| flip_one(e, *f)).collect()
 }
 
 fn flip_one((x, y): (i32, i32), f: Fold) -> (i32, i32) {
@@ -128,7 +128,7 @@ fold along x=5";
     #[test]
     fn flip_set_test() {
         let set = HashSet::from([(0, 3), (3, 2), (6, 3)]);
-        let r = flip(set, Fold::X(3));
+        let r = flip(set, &Fold::X(3));
         assert!(r.contains(&(0, 3)));
         assert!(r.contains(&(3, 2)));
         assert!(!r.contains(&(6, 3)));