From 8560dcb012325c614aa5be12aee44d9de0aaa57d Mon Sep 17 00:00:00 2001
From: Wojciech Kordalski <wkordalski@pm.me>
Date: Wed, 23 Jul 2025 09:14:18 +0200
Subject: [PATCH] Simplify Publisher::subscribe in Observer design pattern

---
 behavioral/observer/observer.rs | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/behavioral/observer/observer.rs b/behavioral/observer/observer.rs
index b662223..a13adfb 100644
--- a/behavioral/observer/observer.rs
+++ b/behavioral/observer/observer.rs
@@ -18,8 +18,7 @@ pub struct Publisher {
 
 impl Publisher {
     pub fn subscribe(&mut self, event_type: Event, listener: Subscriber) {
-        self.events.entry(event_type.clone()).or_default();
-        self.events.get_mut(&event_type).unwrap().push(listener);
+        self.events.entry(event_type.clone()).or_default().push(listener);
     }
 
     pub fn unsubscribe(&mut self, event_type: Event, listener: Subscriber) {