update example

update example

examples/tcp_client.rs

@@ -11,30 +11,23 @@ fn main() -> io::Result<()> {
     }
     let addr = net::SocketAddr::new(net::Ipv4Addr::LOCALHOST.into(), 8080);
     socket.set_nonblocking(true)?;
-    let res = socket.connect(&addr.into());
+    let _ = socket.connect(&addr.into());
 
     let mut events = polling::Events::new();
-    // while let Err(ref e) = res {
-        // if e.kind() != io::ErrorKind::WouldBlock {
-        //     return Err(io::Error::new(e.kind(), e.to_string()));
-        // }
 
-        events.clear();
-        poller.wait(&mut events, None)?;
+    events.clear();
+    poller.wait(&mut events, None)?;
 
-        let event = events.iter().next();
-        if event.is_none() {
-            println!("no event");
-            // break;
-        }
+    let event = events.iter().next();
+    let Some(event) = event else {
+        println!("no event");
+        return Ok(());
+    };
 
-        let event = event.unwrap();
-        println!("event: {:?}", event);
-        if event.is_connect_failed() {
-            println!("connect failed");
-            // break;
-        }
-    // }
+    println!("event: {:?}", event);
+    if event.is_connect_failed() {
+        println!("connect failed");
+    }
 
     Ok(())
 }