use destructuring for args

src/main.rs

@@ -26,48 +26,50 @@ impl From<redis::RedisError> for WatchError {
     }
 }
 
-fn watch(path: String, redis_connect: String, redis_list: String) -> Result<(), WatchError> {
+fn watch(path: &str, redis_connect: &str, redis_list: &str) -> Result<(), WatchError> {
     let (tx, rx) = channel();
 
     let mut watcher: RecommendedWatcher = Watcher::new(tx, Duration::from_secs(2))?;
-    let client = Client::open(redis_connect.as_ref())?;
+    let client = Client::open(redis_connect)?;
     let con = client.get_connection()?;
 
     watcher.watch(path, RecursiveMode::Recursive)?;
 
     loop {
         match rx.recv() {
-            Ok(event) => push_event(event, &con, &redis_list)?,
+            Ok(event) => push_event(event, &con, redis_list)?,
             Err(e) => println!("watch error: {:?}", e),
         }
     }
 }
 
-fn push_event(event: DebouncedEvent, con: &Connection, list: &String) -> RedisResult<()> {
+fn push_event(event: DebouncedEvent, con: &Connection, list: &str) -> RedisResult<()> {
     match format_event(event) {
         Some(formatted_event) => {
             println!("{}", formatted_event);
             return con.lpush(list, formatted_event);
-        },
-        None => Ok(())
+        }
+        None => Ok(()),
     }
 }
 
 fn format_event(event: DebouncedEvent) -> Option<String> {
     match event {
-        DebouncedEvent::Write(path) |
-        DebouncedEvent::Create(path) |
-        DebouncedEvent::Chmod(path) => Some(format!("write|{}", path.to_str()?)),
-        DebouncedEvent::Rename(from, to) => Some(format!("rename|{}|{}", from.to_str()?, to.to_str()?)),
+        DebouncedEvent::Write(path)
+        | DebouncedEvent::Create(path)
+        | DebouncedEvent::Chmod(path) => Some(format!("write|{}", path.to_str()?)),
+        DebouncedEvent::Rename(from, to) => {
+            Some(format!("rename|{}|{}", from.to_str()?, to.to_str()?))
+        }
         DebouncedEvent::Remove(path) => Some(format!("remove|{}", path.to_str()?)),
-        _ => None
+        _ => None,
     }
 }
 
 fn main() {
     let args: Vec<_> = env::args().collect();
-    if args.len() == 4 {
-        if let Err(e) = watch(args[1].to_owned(), args[2].to_owned(), args[3].to_owned()) {
+    if let [_, path, redis, list] = args.as_slice() {
+        if let Err(e) = watch(path, redis, list) {
             println!("error: {:?}", e)
         }
     } else {