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@ -97,6 +97,7 @@ class SingletonPattern {
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.
<img src = "https://github.com/jphong1111/Useful_Swift/blob/main/Images/observer.png" />
## Code Structuring