👀 #12 What is Hashable protocol in SwiftUI?

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👀 #13 Sort, Filter, and Map data arrays in Swift

  1. Sort - organize data by criteria
    2. Filter - create a subset of your data
    3. Map - transform data from one type to another
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    #14 How to use Core Data with @FetchRequest in SwiftUI

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    👀 #17 Multi-threading with background threads and queues in Xcode(23:48)

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    👀 #18 How to use weak self in Swift(20:32)

    Swift使用自动引用计数(ARC)来管理应用程序的内存使用情况。作为开发者，你应该尽量减少ARC数量，这样你的应用才能快速高效地运行。在这个视频中，我们将学习如何使用“弱引用”而不是“强引用”来保持我们的计数较低
  • 避免强引用，导致一直无效的等待无法deinit回收

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