make clippy happy

src/bin/01.rs

@@ -22,7 +22,7 @@ pub fn part_one(input: &str) -> Option<u32> {
         // println!("Line {}: abs({} - {}) = {}", i+1, vec_a[i], vec_b[i], diff)
     }
     // println!("Total {result}");
-    return Some(result);
+    Some(result)
 }
 
 pub fn part_two(input: &str) -> Option<u32> {
@@ -41,16 +41,15 @@ pub fn part_two(input: &str) -> Option<u32> {
     vec_a.sort();
     vec_b.sort();
 
-    for i in 0..vec_a.len() {
-        let needle = vec_a[i];
-        let found = vec_b.iter().filter(|&&b| b == needle).count() as u32;
-        let similarity = found * needle;
+    for item in &vec_a {
+        let found = vec_b.iter().filter(|&b| b == item).count() as u32;
+        let similarity = found * item;
         result += similarity;
 
         // println!("Line {}: {} found {} times = {}, total {}", i + 1, needle, found, similarity, result);
     }
     // println!("Total {result}");
-    return Some(result);
+    Some(result)
 }
 
 #[cfg(test)]

src/bin/02.rs

@@ -7,10 +7,10 @@ pub fn part_one(input: &str) -> Option<u32> {
         let values: Vec<_> = line.split(" ").map(|f| f.parse::<u32>().unwrap()).collect();
         let is_valid = is_valid_report(&values);
         // println!("Report {} {} valid", line, if is_valid { "is" } else { "is NOT" });
-        if is_valid { return total + 1 } else { return total };
+        if is_valid { total + 1 } else { total }
     });
 
-    return Some(valid_reports);
+    Some(valid_reports)
 }
 
 pub fn part_two(input: &str) -> Option<u32> {
@@ -21,10 +21,10 @@ pub fn part_two(input: &str) -> Option<u32> {
 
         let is_valid = is_any_valid_report(&values);
         // println!("Report {} {} valid", line, if is_valid { "is" } else { "is NOT" });
-        if is_valid { return total + 1 } else { return total };
+        if is_valid { total + 1 } else { total }
     });
 
-    return Some(valid_reports);
+    Some(valid_reports)
 }
 
 enum Direction {
@@ -33,7 +33,7 @@ enum Direction {
     Decreasing,
 }
 
-fn is_valid_report(values: &Vec<u32>) -> bool {
+fn is_valid_report(values: &[u32]) -> bool {
     let mut direction = Direction::Unknown;
     // println!("Checking values {:?}", values);
     let mut last_report = *values.first().unwrap();
@@ -66,10 +66,10 @@ fn is_valid_report(values: &Vec<u32>) -> bool {
         last_report = report;
     }
 
-    return true;
+    true
 }
 
-fn is_any_valid_report(values: &Vec<u32>) -> bool {
+fn is_any_valid_report(values: &[u32]) -> bool {
     if is_valid_report(values) {
         return true;
     }
@@ -80,20 +80,18 @@ fn is_any_valid_report(values: &Vec<u32>) -> bool {
         }
     }
 
-    return false;
+    false
 }
 
-fn copy_except(values: &Vec<u32>, exclude_idx: usize) -> Vec<u32> {
+fn copy_except(values: &[u32], exclude_idx: usize) -> Vec<u32> {
     let mut new_values: Vec<u32> = Vec::new();
-    let mut idx = 0;
-    for value in values {
+    for (idx, value) in values.iter().enumerate() {
         if idx != exclude_idx {
             new_values.push(*value);
         }
-        idx += 1;
     }
     // println!("copied new values {:?}", new_values);
-    return new_values;
+    new_values
 }
 
 #[cfg(test)]

src/bin/03.rs

@@ -11,10 +11,10 @@ pub fn part_one(input: &str) -> Option<u32> {
         let b = b_str.parse::<u32>().unwrap();
         let product = a * b;
 
-        return total + product;
+        total + product
     });
 
-    return Some(result);
+    Some(result)
 }
 
 pub fn part_two(input: &str) -> Option<u32> {
@@ -25,21 +25,21 @@ pub fn part_two(input: &str) -> Option<u32> {
         // println!("Captures: {command} ({a_str}, {b_str})");
 
         match command {
-            "do" => return (true, total),
-            "don't" => return (false, total),
+            "do" => (true, total),
+            "don't" => (false, total),
             "mul" => {
                 if !enabled { return (enabled, total) };
 
                 let a = a_str.parse::<u32>().unwrap();
                 let b = b_str.parse::<u32>().unwrap();
                 let product = a * b;
-                return (enabled, total + product)
+                (enabled, total + product)
             },
             _ => panic!("Could not match command {command}"),
         }
     });
 
-    return Some(result);
+    Some(result)
 }
 
 #[cfg(test)]