threads2 solution

exercises/20_threads/threads2.rs

@@ -1,35 +1,34 @@
 // Building on the last exercise, we want all of the threads to complete their
-// work but this time the spawned threads need to be in charge of updating a
-// shared value: JobStatus.jobs_completed
+// work. But this time, the spawned threads need to be in charge of updating a
+// shared value: `JobStatus.jobs_done`
 
-use std::sync::Arc;
-use std::thread;
-use std::time::Duration;
+use std::{sync::Arc, thread, time::Duration};
 
 struct JobStatus {
-    jobs_completed: u32,
+    jobs_done: u32,
 }
 
 fn main() {
-    // TODO: `Arc` isn't enough if you want a **mutable** shared state
-    let status = Arc::new(JobStatus { jobs_completed: 0 });
+    // TODO: `Arc` isn't enough if you want a **mutable** shared state.
+    let status = Arc::new(JobStatus { jobs_done: 0 });
 
-    let mut handles = vec![];
+    let mut handles = Vec::new();
     for _ in 0..10 {
         let status_shared = Arc::clone(&status);
         let handle = thread::spawn(move || {
             thread::sleep(Duration::from_millis(250));
-            // TODO: You must take an action before you update a shared value
-            status_shared.jobs_completed += 1;
+
+            // TODO: You must take an action before you update a shared value.
+            status_shared.jobs_done += 1;
         });
         handles.push(handle);
     }
 
-    // Waiting for all jobs to complete
+    // Waiting for all jobs to complete.
     for handle in handles {
         handle.join().unwrap();
     }
 
-    // TODO: Print the value of `JobStatus.jobs_completed`
-    println!("Jobs completed: {}", ???);
+    // TODO: Print the value of `JobStatus.jobs_done`.
+    println!("Jobs done: {}", todo!());
 }