Add exercise 212, 258, fix clippy warnings

e_364/src/main.rs

@@ -116,7 +116,7 @@ impl FromStr for Dice {
     fn from_str(s: &str) -> Result<Dice, Self::Err> {
         // Split string at "d" delimeter, parse elements into Dice struct containing u32s
         let dice = s
-            .split("d")
+            .split('d')
             .map(|x| x.parse::<u32>())
             .collect::<Result<Vec<u32>, ParseIntError>>();
         let dice = match dice {
@@ -149,7 +149,7 @@ fn main() {
 /// Main exercise loop
 fn e_364() {
     let input = fs::read_to_string("input.txt").unwrap();
-    let dice: Result<Vec<Dice>, DiceError> = input.split("\n").map(|x| x.parse()).collect();
+    let dice: Result<Vec<Dice>, DiceError> = input.split('\n').map(|x| x.parse()).collect();
     match dice {
         Ok(d) => d.iter().for_each(|x| println!("{}", x.roll_dice())),
         Err(DiceError::ParseInt(e)) => eprintln!("Could not parse integer: {:?}", e),
@@ -169,7 +169,7 @@ mod tests {
             Dice { count: 16, die: 2 }
         );
     }
-
+    #[test]
     fn test_error_handling() {
         assert!(matches!("3dx".parse::<Dice>(), Err(DiceError::ParseInt(_))));
         assert_eq!("3d3d3".parse::<Dice>(), Err(DiceError::ParseFields));