feat(02/2024): use cmp instead of if statements

src/solutions/year2024/day02.rs

@@ -1,5 +1,5 @@
-use crate::solutions::year2024::day02::State::{Decreasing, Equals, Increasing};
 use crate::solutions::Solution;
+use std::cmp::Ordering;
 
 pub struct Day02;
 
@@ -10,7 +10,7 @@ impl Solution for Day02 {
         input
             .iter()
             .filter(|report| {
-                let mut state: Option<State> = None;
+                let mut state: Option<Ordering> = None;
 
                 for i in 0..report.len() - 1 {
                     let first = report.get(i).unwrap();
@@ -20,18 +20,9 @@ impl Solution for Day02 {
                         return false;
                     }
 
-                    let current_state = if first < second {
-                        Increasing
-                    } else if first > second {
-                        Decreasing
-                    } else if first == second {
-                        Equals
-                    } else {
-                        unreachable!()
-                    };
-
+                    let current_state = first.cmp(second);
                     if let Some(inner_state) = state {
-                        if inner_state == Equals {
+                        if inner_state == Ordering::Equal {
                             return false;
                         }
                         if inner_state != current_state {
@@ -66,13 +57,6 @@ impl Day02 {
     }
 }
 
-#[derive(Copy, Clone, PartialEq)]
-enum State {
-    Increasing,
-    Decreasing,
-    Equals,
-}
-
 #[cfg(test)]
 mod tests {
     use crate::solutions::year2024::day02::Day02;