Complete Day 80

README.md

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 - **Day 76:** [_Project 15: Accessibility_ (Part Three)](./day-076/)
 - **Day 77:** [Milestone for Projects 13-15 (Part One)](./day-077/)
 - **Day 78:** [Milestone for Projects 13-15 (Part Two)](./day-078/)
+- **Day 79:** [_Project 16: QRCollector (Part One)_](./day-079/)
 
 </details>
 
-- **Day 79:** [_Project 16: QRCollector (Part One)_](./day-079/)
+- **Day 80:** [_Project 16: QRCollector (Part Two)_](./day-080/)
 
 
 

day-080/README.md

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+# Day 80: _Project 16: QRCollector_ (Part Two)
+
+_Follow along at https://www.hackingwithswift.com/100/swiftui/80_.
+
+<br/>
+
+
+# 📒 Field Notes
+
+This day covers Part Two of _`Project 16`_ in the [100 Days of SwiftUI Challenge](https://www.hackingwithswift.com/100/swiftui/80). (Project 16 files can be found in the [directory for Part One](../day-079/).)
+
+It focuses on several specific topics:
+
+- Understanding Swift’s Result type
+- Manually publishing ObservableObject changes
+- Controlling image interpolation in SwiftUI
+
+
+
+## Understanding Swift’s Result type
+
+Being able to return declarative, deterministic, strongly-typed information about the success or failure of an operation is a beautiful -- and useful -- concept -- even more so when dealing with asynchronous operations.
+
+It's no coincidence that Swift's `Result` type is basically what [everyone was rolling on their own](https://www.swiftbysundell.com/articles/the-power-of-result-types-in-swift/) well before its introduction in Swift 5 😆.
+