clippy fixes

src/ch04_machinery/turing.rs

@@ -55,7 +55,7 @@ pub fn run(machine: Machine, code: Tape) -> Tape {
         };
     }
 
-    return tape;
+    tape
 }
 
 #[test]

src/ch05_bigo/search.rs

@@ -2,12 +2,7 @@
 #[allow(unused_imports)]
 
 pub fn brute_force_search<T: PartialEq>(arr: &[T], el: T) -> bool {
-    for i in 0..arr.len() {
-        if arr[i] == el {
-            return true;
-        }
-    }
-    return false;
+    arr.contains(&el)
 }
 
 pub fn binary_search<T: Ord>(arr: &[T], el: T) -> bool {

src/ch06_datastructures/heap.rs

@@ -20,6 +20,10 @@ impl<T: PartialOrd> Heap<T> {
         self.elements.len()
     }
 
+    pub fn is_empty(&self) -> bool {
+        self.elements.is_empty()
+    }
+
     pub fn push(&mut self, item: T) {
         self.elements.push(item);
         let mut i = self.len() - 1;
@@ -30,7 +34,7 @@ impl<T: PartialOrd> Heap<T> {
     }
 
     pub fn pop(&mut self) -> Option<T> {
-        if self.len() > 0 {
+        if !self.is_empty() {
             let result = self.elements.swap_remove(0);
             self.heapify(0);
             Some(result)

src/ch06_datastructures/queue.rs

@@ -26,6 +26,10 @@ impl<T> Queue<T> {
         self.length
     }
 
+    pub fn is_empty(&self) -> bool {
+        self.length == 0
+    }
+
     pub fn enqueue(&mut self, value: T) {
         let mut item = Box::new(Node {
             value,
@@ -44,7 +48,7 @@ impl<T> Queue<T> {
 
         self.rear = raw_rear;
 
-        self.length = self.length + 1;
+        self.length += 1;
     }
 
     pub fn dequeue(&mut self) -> Option<T> {