Fix clippy issues on all days

Signed-off-by: Anthony Oteri <anthony.oteri@gmail.com>

day-01/src/main.rs

@@ -1,12 +1,10 @@
 fn part_1(input: &str) -> u32 {
     let values: Vec<u32> = input
         .lines()
-        .into_iter()
         .map(|line| {
             let numbers: Vec<u8> = line
                 .chars()
-                .into_iter()
-                .filter(|c| c.is_digit(10))
+                .filter(|c| c.is_ascii_digit())
                 .map(|c| c.to_digit(10).unwrap() as u8)
                 .collect();
 
@@ -20,9 +18,8 @@ fn part_1(input: &str) -> u32 {
 fn part_2(input: &str) -> u32 {
     let values: Vec<u32> = input
         .lines()
-        .into_iter()
         .map(|line| {
-            let before = line.clone();
+            let before = line;
 
             let line = line
                 .to_owned()
@@ -58,14 +55,13 @@ fn part_2(input: &str) -> u32 {
 
             let numbers: Vec<u8> = line
                 .chars()
-                .into_iter()
-                .filter(|c| c.is_digit(10))
+                .filter(|c| c.is_ascii_digit())
                 .map(|c| c.to_digit(10).unwrap() as u8)
                 .collect();
 
             let sum: u32 = numbers[0] as u32 * 10 + *numbers.last().unwrap() as u32;
             println!("{before} -> {line} => {numbers:?} => {sum}");
-            assert!(sum >= 10 && sum <= 99);
+            assert!((10..=99).contains(&sum));
             sum
         })
         .collect();

day-02/src/main.rs

@@ -47,7 +47,7 @@ fn parse_input(input: &str) -> Vec<Game> {
     for line in input.lines() {
         let mut bags = Vec::new();
 
-        let (game_part, bags_part) = line.split_once(":").unwrap();
+        let (game_part, bags_part) = line.split_once(':').unwrap();
 
         let game_id = game_part
             .strip_prefix("Game ")

day-04/src/main.rs

@@ -11,7 +11,7 @@ impl Card {
     fn winner(&self) -> usize {
         let mut count = 0;
         for guess in &self.winning_numbers {
-            if self.game_numbers.contains(&guess) {
+            if self.game_numbers.contains(guess) {
                 count += 1;
             }
         }
@@ -33,7 +33,7 @@ fn parse_input(input: &str) -> Vec<Card> {
     for line in input.lines() {
         let mut card = Card::default();
 
-        let (id_part, numbers_part) = line.split_once(":").unwrap();
+        let (id_part, numbers_part) = line.split_once(':').unwrap();
         card.id = id_part
             .strip_prefix("Card")
             .unwrap()
@@ -41,7 +41,7 @@ fn parse_input(input: &str) -> Vec<Card> {
             .parse::<usize>()
             .unwrap();
 
-        let (winning_numbers_part, gamen_numbers_part) = numbers_part.split_once("|").unwrap();
+        let (winning_numbers_part, gamen_numbers_part) = numbers_part.split_once('|').unwrap();
 
         card.winning_numbers = winning_numbers_part
             .split_whitespace()
@@ -97,8 +97,8 @@ fn part_2(input: &str) -> usize {
 
 fn main() {
     let input = include_str!("../input.txt");
-    println!("Part 1: {}", part_1(&input));
-    println!("Part 2: {}", part_2(&input));
+    println!("Part 1: {}", part_1(input));
+    println!("Part 2: {}", part_2(input));
 }
 
 #[cfg(test)]

day-06/src/main.rs

@@ -77,8 +77,8 @@ fn part2_preformat(input: &str) -> String {
     let input = String::from(input);
     input
         .lines()
-        .map(|l| l.replace(" ", ""))
-        .map(|l| l.replace(":", ": "))
+        .map(|l| l.replace(' ', ""))
+        .map(|l| l.replace(':', ": "))
         .collect::<Vec<String>>()
         .join("\n")
 }