From 69fe736ff0547df3b64c4a3cc9b7da05b8d3f64b Mon Sep 17 00:00:00 2001
From: pjht <terppa05@gmail.com>
Date: Sat, 3 Dec 2022 08:14:04 -0600
Subject: [PATCH] Rewrite day 3 to use Iterator::find

---
 src/day03.rs | 23 +++++++++++------------
 1 file changed, 11 insertions(+), 12 deletions(-)

diff --git a/src/day03.rs b/src/day03.rs
index 0f2e913..3a9229d 100644
--- a/src/day03.rs
+++ b/src/day03.rs
@@ -16,12 +16,11 @@ pub struct NoCommonItem;
 
 impl Rucksack {
     fn find_item_in_both_halves(&self) -> Result<u8, NoItemInBothHalves> {
-        for &item in &self.first_half {
-            if self.second_half.contains(&item) {
-                return Ok(item);
-            }
-        }
-        Err(NoItemInBothHalves)
+        self.first_half
+            .iter()
+            .copied()
+            .find(|item| self.second_half.contains(item))
+            .ok_or(NoItemInBothHalves)
     }
 
     fn has_item(&self, item: u8) -> bool {
@@ -29,12 +28,12 @@ impl Rucksack {
     }
 
     fn find_common_item(&self, others: &[Rucksack]) -> Result<u8, NoCommonItem> {
-        for &item in self.first_half.iter().chain(&self.second_half) {
-            if others.iter().all(|rucksack| rucksack.has_item(item)) {
-                return Ok(item);
-            }
-        }
-        Err(NoCommonItem)
+        self.first_half
+            .iter()
+            .chain(&self.second_half)
+            .copied()
+            .find(|&item| others.iter().all(|rucksack| rucksack.has_item(item)))
+            .ok_or(NoCommonItem)
     }
 }