threads3 solution

exercises/20_threads/threads3.rs

@@ -1,7 +1,4 @@
-use std::sync::mpsc;
-use std::sync::Arc;
-use std::thread;
-use std::time::Duration;
+use std::{sync::mpsc, thread, time::Duration};
 
 struct Queue {
     length: u32,
@@ -11,7 +8,7 @@ struct Queue {
 
 impl Queue {
     fn new() -> Self {
-        Queue {
+        Self {
             length: 10,
             first_half: vec![1, 2, 3, 4, 5],
             second_half: vec![6, 7, 8, 9, 10],
@@ -19,20 +16,22 @@ impl Queue {
     }
 }
 
-fn send_tx(q: Queue, tx: mpsc::Sender<u32>) -> () {
+fn send_tx(q: Queue, tx: mpsc::Sender<u32>) {
+    // TODO: We want to send `tx` to both threads. But currently, it is moved
+    // into the frist thread. How could you solve this problem?
     thread::spawn(move || {
         for val in q.first_half {
-            println!("sending {:?}", val);
+            println!("Sending {val:?}");
             tx.send(val).unwrap();
-            thread::sleep(Duration::from_secs(1));
+            thread::sleep(Duration::from_millis(250));
         }
     });
 
     thread::spawn(move || {
         for val in q.second_half {
-            println!("sending {:?}", val);
+            println!("Sending {val:?}");
             tx.send(val).unwrap();
-            thread::sleep(Duration::from_secs(1));
+            thread::sleep(Duration::from_millis(250));
         }
     });
 }
@@ -55,11 +54,11 @@ mod tests {
 
         let mut total_received: u32 = 0;
         for received in rx {
-            println!("Got: {}", received);
+            println!("Got: {received}");
             total_received += 1;
         }
 
-        println!("total numbers received: {}", total_received);
+        println!("Number of received values: {total_received}");
         assert_eq!(total_received, queue_length);
     }
 }