prettify and lint optimization

Day07/rust/src/main.rs

@@ -7,14 +7,12 @@ fn read_hands(filename: &str) -> io::Result<Vec<(String, i32)>> {
     let lines = io::BufReader::new(file).lines();
 
     let mut hands = Vec::new();
-    for line in lines {
-        if let Ok(line) = line {
-            let parts: Vec<&str> = line.split_whitespace().collect();
-            if parts.len() == 2 {
-                let hand = parts[0].to_string();
-                let bid: i32 = parts[1].parse().unwrap();
-                hands.push((hand, bid));
-            }
+    for line in lines.flatten() {
+        let parts: Vec<&str> = line.split_whitespace().collect();
+        if parts.len() == 2 {
+            let hand = parts[0].to_string();
+            let bid: i32 = parts[1].parse().unwrap();
+            hands.push((hand, bid));
         }
     }
     Ok(hands)
@@ -22,11 +20,11 @@ fn read_hands(filename: &str) -> io::Result<Vec<(String, i32)>> {
 
 fn replace_face_cards(hand: &str) -> String {
     let mut replaced = hand.to_string();
-    replaced = replaced.replace("T", "a");
-    replaced = replaced.replace("J", "1");
-    replaced = replaced.replace("Q", "c");
-    replaced = replaced.replace("K", "d");
-    replaced = replaced.replace("A", "e");
+    replaced = replaced.replace('T', "a");
+    replaced = replaced.replace('J', "1");
+    replaced = replaced.replace('Q', "c");
+    replaced = replaced.replace('K', "d");
+    replaced = replaced.replace('A', "e");
     replaced
 }
 
@@ -44,7 +42,11 @@ fn calculate_strength(hand: &str) -> (i32, String) {
 
     let mut best_category = 4; // Default to High card
     for (card, count) in &counts {
-        let adjusted_count = if *card != '1' { count + joker_count } else { *count };
+        let adjusted_count = if *card != '1' {
+            count + joker_count
+        } else {
+            *count
+        };
         best_category = best_category.max(match adjusted_count {
             5 => 10,
             4 => 9,
@@ -56,7 +58,10 @@ fn calculate_strength(hand: &str) -> (i32, String) {
 
     // Use original hand for tie-breaking
     let tie_breaker_hand = hand.chars().collect::<String>();
-    println!("Hand: {}, Strength: {}, Tie-breaker hand: {}", hand, best_category, tie_breaker_hand);
+    println!(
+        "Hand: {}, Strength: {}, Tie-breaker hand: {}",
+        hand, best_category, tie_breaker_hand
+    );
     (best_category, tie_breaker_hand)
 }
 
@@ -69,17 +74,30 @@ fn calculate_total_winnings(hands: Vec<(String, i32)>) -> i32 {
         (strength_b, tie_breaker_b).cmp(&(strength_a, tie_breaker_a))
     });
 
-    sorted_hands.iter().enumerate().fold(0, |acc, (i, (hand, bid))| {
-        let winnings = bid * (i as i32 + 1);
-        println!("Hand: {}, Rank: {}, Bid: {}, Winnings: {}", hand, i + 1, bid, winnings);
-        acc + winnings
-    })
+    sorted_hands
+        .iter()
+        .enumerate()
+        .fold(0, |acc, (i, (hand, bid))| {
+            let winnings = bid * (i as i32 + 1);
+            println!(
+                "Hand: {}, Rank: {}, Bid: {}, Winnings: {}",
+                hand,
+                i + 1,
+                bid,
+                winnings
+            );
+            acc + winnings
+        })
 }
 
 fn main() {
     let test_hands = read_hands("../test.txt").expect("Failed to read test file");
     let test_total = calculate_total_winnings(test_hands);
-    assert_eq!(test_total, 5905, "Test failed: expected 5905, got {}", test_total);
+    assert_eq!(
+        test_total, 5905,
+        "Test failed: expected 5905, got {}",
+        test_total
+    );
     println!("Test passed: Total winnings = {}", test_total);
 
     let hands = read_hands("../input.txt").expect("Failed to read input file");