diff --git a/2023/day-13/src/part1.rs b/2023/day-13/src/part1.rs
index 4ff76de..0864b00 100644
--- a/2023/day-13/src/part1.rs
+++ b/2023/day-13/src/part1.rs
@@ -23,13 +23,13 @@ impl Drawing {
                     .iter()
                     .filter(|mound| mound.x + span >= reflect_col && mound.x < reflect_col)
                     .map(|mound| (2 * reflect_col - mound.x - 1, mound.y).into())
-                    .all(|mound_reflect| self.mounds.get(&mound_reflect).is_some())
+                    .all(|mound_reflect| self.mounds.contains(&mound_reflect))
                     && self
                         .mounds
                         .iter()
                         .filter(|mound| mound.x < reflect_col + span && mound.x >= reflect_col)
                         .map(|mound| (2 * reflect_col - mound.x - 1, mound.y).into())
-                        .all(|mound_reflect| self.mounds.get(&mound_reflect).is_some())
+                        .all(|mound_reflect| self.mounds.contains(&mound_reflect))
             })
             .sum::<u32>();
         let row_score = (1..max_row)
@@ -40,13 +40,13 @@ impl Drawing {
                     .iter()
                     .filter(|mound| mound.y + span >= reflect_row && mound.y < reflect_row)
                     .map(|mound| (mound.x, 2 * reflect_row - mound.y - 1).into())
-                    .all(|mound_reflect| self.mounds.get(&mound_reflect).is_some())
+                    .all(|mound_reflect| self.mounds.contains(&mound_reflect))
                     && self
                         .mounds
                         .iter()
                         .filter(|mound| mound.y < reflect_row + span && mound.y >= reflect_row)
                         .map(|mound| (mound.x, 2 * reflect_row - mound.y - 1).into())
-                        .all(|mound_reflect| self.mounds.get(&mound_reflect).is_some())
+                        .all(|mound_reflect| self.mounds.contains(&mound_reflect))
             })
             .sum::<u32>()
             * 100;
diff --git a/2023/day-13/src/part2.rs b/2023/day-13/src/part2.rs
index 10403b7..b6d2cb2 100644
--- a/2023/day-13/src/part2.rs
+++ b/2023/day-13/src/part2.rs
@@ -24,14 +24,14 @@ impl Drawing {
                     .iter()
                     .filter(|mound| mound.x + span >= reflect_col && mound.x < reflect_col)
                     .map(|mound| (2 * reflect_col - mound.x - 1, mound.y).into())
-                    .filter(|mound_reflect| self.mounds.get(mound_reflect).is_none())
+                    .filter(|mound_reflect| !self.mounds.contains(mound_reflect))
                     .count()
                     + self
                         .mounds
                         .iter()
                         .filter(|mound| mound.x < reflect_col + span && mound.x >= reflect_col)
                         .map(|mound| (2 * reflect_col - mound.x - 1, mound.y).into())
-                        .filter(|mound_reflect| self.mounds.get(mound_reflect).is_none())
+                        .filter(|mound_reflect| !self.mounds.contains(mound_reflect))
                         .count())
                     == 1
             })
@@ -45,14 +45,14 @@ impl Drawing {
                     .iter()
                     .filter(|mound| mound.y + span >= reflect_row && mound.y < reflect_row)
                     .map(|mound| (mound.x, 2 * reflect_row - mound.y - 1).into())
-                    .filter(|mound_reflect| self.mounds.get(mound_reflect).is_none())
+                    .filter(|mound_reflect| !self.mounds.contains(mound_reflect))
                     .count()
                     + self
                         .mounds
                         .iter()
                         .filter(|mound| mound.y < reflect_row + span && mound.y >= reflect_row)
                         .map(|mound| (mound.x, 2 * reflect_row - mound.y - 1).into())
-                        .filter(|mound_reflect| self.mounds.get(mound_reflect).is_none())
+                        .filter(|mound_reflect| !self.mounds.contains(mound_reflect))
                         .count())
                     == 1
             })
diff --git a/2023/day-14/src/part2.rs b/2023/day-14/src/part2.rs
index 9d06d66..ca20da0 100644
--- a/2023/day-14/src/part2.rs
+++ b/2023/day-14/src/part2.rs
@@ -57,11 +57,12 @@ pub fn part2(input: &str) -> String {
 
     let pos_in_cycle = start_of_cycle + (cycles - end_of_cycle) % len_of_cyle;
 
-    map = cache
-        .values()
-        .find_map(|(look_at_map, pos)| (*pos == pos_in_cycle).then_some(look_at_map))
-        .unwrap()
-        .clone();
+    map.clone_from(
+        cache
+            .values()
+            .find_map(|(look_at_map, pos)| (*pos == pos_in_cycle).then_some(look_at_map))
+            .unwrap(),
+    );
 
     let mut total = 0_usize;
     for col in 0..maxes.x {
diff --git a/2023/day-23/src/part1.rs b/2023/day-23/src/part1.rs
index 3b69ef8..e853dd6 100644
--- a/2023/day-23/src/part1.rs
+++ b/2023/day-23/src/part1.rs
@@ -60,8 +60,7 @@ pub fn part1(input: &str) -> String {
                 .filter_map(|dir| {
                     let next_pos = dir + *pos;
                     node_map
-                        .get(&next_pos)
-                        .is_some()
+                        .contains_key(&next_pos)
                         .then(|| (node_map[pos], node_map[&next_pos], 1))
                 })
                 .collect::<Vec<_>>()
diff --git a/2023/day-23/src/part2.rs b/2023/day-23/src/part2.rs
index fe9c701..96daeb0 100644
--- a/2023/day-23/src/part2.rs
+++ b/2023/day-23/src/part2.rs
@@ -47,8 +47,7 @@ pub fn part2(input: &str) -> String {
                 .filter_map(|dir| {
                     let next_pos = dir + *pos;
                     node_map
-                        .get(&next_pos)
-                        .is_some()
+                        .contains_key(&next_pos)
                         .then(|| (node_map[pos], node_map[&next_pos], 1))
                 })
                 .collect::<Vec<_>>()
diff --git a/2023/day-3/src/part1.rs b/2023/day-3/src/part1.rs
index f7d1f68..8fa1aea 100644
--- a/2023/day-3/src/part1.rs
+++ b/2023/day-3/src/part1.rs
@@ -34,7 +34,7 @@ pub fn part1(input: &str) -> String {
         .filter(|x| {
             x.generate_adjacent()
                 .iter()
-                .any(|t| symbols.get(t).is_some())
+                .any(|t| symbols.contains_key(t))
         })
         .map(|x| x.no)
         .sum::<u64>()
diff --git a/2023/day-5/src/part1.rs b/2023/day-5/src/part1.rs
index 48743d3..e982886 100644
--- a/2023/day-5/src/part1.rs
+++ b/2023/day-5/src/part1.rs
@@ -74,6 +74,7 @@ impl ItemMap {
             .expect("always")
     }
 }
+
 /// part1 of day 5 of AOC 2023
 ///
 /// # Arguments
@@ -81,7 +82,6 @@ impl ItemMap {
 ///
 /// # Panics
 /// panics whenever the input isn't parsable
-
 #[must_use]
 pub fn part1(input: &str) -> String {
     let (_input, (mut to_process, maps)) = parse_input(input).expect("aoc always has input");