From c4696e7e2f1a7e8988584921eed61eaccdee859f Mon Sep 17 00:00:00 2001
From: Jungpyo Hong <54448459+jphong1111@users.noreply.github.com>
Date: Thu, 6 May 2021 08:56:57 -0500
Subject: [PATCH] add description about observer pattern

---
 README.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/README.md b/README.md
index 0449de6..7bbeee8 100644
--- a/README.md
+++ b/README.md
@@ -92,6 +92,8 @@ class SingletonPattern {
 
 ### Observer Pattern
 
+The observer pattern lets one object observe changes on another object. Apple added language-level support for this pattern in Swift 5.1 with the addition of Publisher in the Combine framework.
+
 
 ## Code Structuring