Update README.md

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Jungpyo Hong
2021-05-09 14:48:29 -05:00
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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. 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 ## Code Structuring