chore: fmt + clippy

src/bin/01.rs

@@ -136,8 +136,7 @@ impl State {
     fn scan_steps(&mut self, steps: Vec<Step>) -> Vec<Pos> {
         steps
             .into_iter()
-            .map(|step| self.all_locations_towards(&step))
-            .flatten()
+            .flat_map(|step| self.all_locations_towards(&step))
             .collect()
     }
 }
@@ -158,13 +157,13 @@ fn parse_input(_input: &str) -> Vec<Step> {
     _input
         .to_string()
         .strip_suffix("\n")
-        .unwrap_or(&_input)
+        .unwrap_or(_input)
         .split(", ")
         .map(|s| {
             let (direction, value) = s.split_at(1);
-            let length: u32 = value
-                .parse()
-                .expect(&format!("invalid length! {:?}", value).to_string());
+            let length: u32 = value.parse().unwrap_or_else(|_| {
+                panic!("{}", format!("invalid length! {:?}", value).to_string())
+            });
             match direction {
                 "L" => Step(Turn::Left, length),
                 "R" => Step(Turn::Right, length),

src/bin/02.rs

@@ -29,27 +29,21 @@ impl PosP1 {
             _y if _y > 1 => 1,
             _ => y,
         };
-        PosP1 {x: x, y: y}
+        PosP1 { x, y }
     }
 }
 
 impl Keypad for PosP1 {
     fn init() -> PosP1 {
-        Self {
-            x: 0,
-            y: 0,
-        }
+        Self { x: 0, y: 0 }
     }
 
     fn to_digit(self) -> char {
-        let row_offset = (self.y * -1) + 1;
+        let row_offset = -self.y + 1;
         let col_offset = self.x + 1;
-        char::from_digit(
-            ((row_offset * 3) + col_offset + 1).try_into().unwrap(),
-            10
-        ).unwrap()
+        char::from_digit(((row_offset * 3) + col_offset + 1).try_into().unwrap(), 10).unwrap()
     }
-    
+
     fn move_to(self, dir: &Dir) -> PosP1 {
         match dir {
             Dir::Up => PosP1::from_pos(self.x, self.y + 1),
@@ -60,12 +54,12 @@ impl Keypad for PosP1 {
     }
 }
 
-const DISP_P2: [[char; 5]; 5]= [
-    ['0', '0', '1', '0', '0', ],
-    ['0', '2', '3', '4', '0', ],
-    ['5', '6', '7', '8', '9', ],
-    ['0', 'A', 'B', 'C', '0', ],
-    ['0', '0', 'D', '0', '0', ],
+const DISP_P2: [[char; 5]; 5] = [
+    ['0', '0', '1', '0', '0'],
+    ['0', '2', '3', '4', '0'],
+    ['5', '6', '7', '8', '9'],
+    ['0', 'A', 'B', 'C', '0'],
+    ['0', '0', 'D', '0', '0'],
 ];
 
 #[derive(Debug, Copy, Clone)]
@@ -77,12 +71,9 @@ struct PosP2 {
 impl PosP2 {
     fn from(row: usize, col: usize) -> Option<Self> {
         if row > 4 || col > 4 {
-            return None
+            return None;
         }
-        let res = PosP2 {
-            row: row,
-            col: col,
-        };
+        let res = PosP2 { row, col };
         if res.to_digit() == '0' {
             None
         } else {
@@ -91,13 +82,9 @@ impl PosP2 {
     }
 }
 
-
 impl Keypad for PosP2 {
     fn init() -> PosP2 {
-        Self {
-            row: 2,
-            col: 0
-        }
+        Self { row: 2, col: 0 }
     }
 
     fn to_digit(self) -> char {
@@ -122,43 +109,43 @@ enum Dir {
     Right,
 }
 
-fn compute_digit<T: Keypad>(input: T, path: &Vec<Dir>) -> T {
-    path
-        .into_iter()
-        .fold(input, |pos, dir| pos.move_to(dir))
+fn compute_digit<T: Keypad>(input: T, path: &[Dir]) -> T {
+    path.iter().fold(input, |pos, dir| pos.move_to(dir))
 }
 
-
 fn parse_input(input: &str) -> Vec<Vec<Dir>> {
     input
         .to_string()
         .strip_suffix("\n")
-        .unwrap_or(&input)
+        .unwrap_or(input)
         .split("\n")
-        .map(|s| s
-            .chars()
-            .map(|c| match c {
-                'U' => Dir::Up,
-                'D' => Dir::Down,
-                'L' => Dir::Left,
-                'R' => Dir::Right,
-                _ => panic!("Invalid input!"),
-            })
-            .collect()
-    ).collect()
+        .map(|s| {
+            s.chars()
+                .map(|c| match c {
+                    'U' => Dir::Up,
+                    'D' => Dir::Down,
+                    'L' => Dir::Left,
+                    'R' => Dir::Right,
+                    _ => panic!("Invalid input!"),
+                })
+                .collect()
+        })
+        .collect()
 }
 
 fn solve<T: Keypad + Copy>(input: &str) -> Option<String> {
     let dirs = parse_input(input);
     let digit: T = T::init();
-    let res: Vec<char> = dirs.into_iter().scan(digit, |digit, ds| {
-        *digit = compute_digit(*digit, &ds);
-        Some(digit.to_digit())
-    }).collect();
+    let res: Vec<char> = dirs
+        .into_iter()
+        .scan(digit, |digit, ds| {
+            *digit = compute_digit(*digit, &ds);
+            Some(digit.to_digit())
+        })
+        .collect();
     Some(String::from_iter(res))
 }
 
-
 pub fn part_one(input: &str) -> Option<String> {
     solve::<PosP1>(input)
 }
@@ -173,17 +160,17 @@ mod tests {
 
     #[test]
     fn test_posp1_to_digit() {
-        assert_eq!(PosP1 {x: -1, y:  1}.to_digit(), '1');
-        assert_eq!(PosP1 {x:  0, y:  1}.to_digit(), '2');
-        assert_eq!(PosP1 {x:  1, y:  1}.to_digit(), '3');
-        assert_eq!(PosP1 {x: -1, y:  0}.to_digit(), '4');
-        assert_eq!(PosP1 {x:  0, y:  0}.to_digit(), '5');
-        assert_eq!(PosP1 {x:  1, y:  0}.to_digit(), '6');
-        assert_eq!(PosP1 {x: -1, y: -1}.to_digit(), '7');
-        assert_eq!(PosP1 {x:  0, y: -1}.to_digit(), '8');
-        assert_eq!(PosP1 {x:  1, y: -1}.to_digit(), '9');
+        assert_eq!(PosP1 { x: -1, y: 1 }.to_digit(), '1');
+        assert_eq!(PosP1 { x: 0, y: 1 }.to_digit(), '2');
+        assert_eq!(PosP1 { x: 1, y: 1 }.to_digit(), '3');
+        assert_eq!(PosP1 { x: -1, y: 0 }.to_digit(), '4');
+        assert_eq!(PosP1 { x: 0, y: 0 }.to_digit(), '5');
+        assert_eq!(PosP1 { x: 1, y: 0 }.to_digit(), '6');
+        assert_eq!(PosP1 { x: -1, y: -1 }.to_digit(), '7');
+        assert_eq!(PosP1 { x: 0, y: -1 }.to_digit(), '8');
+        assert_eq!(PosP1 { x: 1, y: -1 }.to_digit(), '9');
     }
-    
+
     #[test]
     fn test_part_one() {
         let result = part_one(&advent_of_code::template::read_file("examples", DAY));

src/bin/03.rs

@@ -1,10 +1,7 @@
 advent_of_code::solution!(3);
 
 fn parse_line(input: &str) -> [u32; 3] {
-    let nb: Result<Vec<u32>, _> = input
-        .split_whitespace()
-        .map(str::parse)
-        .collect();
+    let nb: Result<Vec<u32>, _> = input.split_whitespace().map(str::parse).collect();
     if let Ok(nb) = nb {
         if nb.len() == 3 {
             return [nb[0], nb[1], nb[2]];
@@ -26,7 +23,7 @@ fn parse_input(input: &str) -> Vec<[u32; 3]> {
 fn parse_input_p2(input: &str) -> Vec<[u32; 3]> {
     parse_input(input)
         .chunks(3)
-        .map(|c| {
+        .flat_map(|c| {
             let v = c.to_vec();
             if v.len() != 3 {
                 println!("{:?}", v);
@@ -34,44 +31,23 @@ fn parse_input_p2(input: &str) -> Vec<[u32; 3]> {
             }
             let vs = [v[0], v[1], v[2]];
             // LAAAAAAZY... Could have transposed
-            let [
-                [ta1, tb1, tc1],
-                [ta2, tb2, tc2],
-                [ta3, tb3, tc3],
-            ] = vs;
-            [
-                [ta1, ta2, ta3],
-                [tb1, tb2, tb3],
-                [tc1, tc2, tc3],
-            ].to_vec()
+            let [[ta1, tb1, tc1], [ta2, tb2, tc2], [ta3, tb3, tc3]] = vs;
+            [[ta1, ta2, ta3], [tb1, tb2, tb3], [tc1, tc2, tc3]].to_vec()
         })
-        .flatten()
         .collect()
 }
 
 fn is_valid(triangle: &[u32; 3]) -> bool {
     let &[a, b, c] = triangle;
-    (a + b) > c
-        && (b + c) > a
-        && (c + a) > b
+    (a + b) > c && (b + c) > a && (c + a) > b
 }
 
 pub fn part_one(input: &str) -> Option<u32> {
-    Some(
-        parse_input(input)
-            .into_iter()
-            .filter(is_valid)
-            .count() as u32
-    )
+    Some(parse_input(input).into_iter().filter(is_valid).count() as u32)
 }
 
 pub fn part_two(input: &str) -> Option<u32> {
-    Some(
-        parse_input_p2(input)
-            .into_iter()
-            .filter(is_valid)
-            .count() as u32
-    )
+    Some(parse_input_p2(input).into_iter().filter(is_valid).count() as u32)
 }
 
 #[cfg(test)]