Generic types can work with any type. In this video, explore how to build a generic Box type.
- [Instructor] Generic types solve…a similar problem as generic functions.…Generic types can work with any type…and not only with the particular class,…structure, or enumeration.…This is why Swift's built in collection types:…the array, the set, and the dictionary…are implemented as generic collections.…Let's say that we need a wrapper that can hold values…of various types.…Strings, integers, dates, you name it.…I'm going to switch to another playground page…where we have some pre-defined structs.…
With a non-generic approach, we'd end up having a wrapper…for each type.…You've got a StringWrapper for string types,…an IntWrapper for integers,…and a DateWrapper for dates.…The number of dedicated wrapper types increases…with each new type that we need to support.…Besides, with every added type, we duplicate code.…The code becomes a maintenance nightmare.…Actually, even choosing the right wrapper…type is challenging.…Generics are here to help us.…
I'm going to remove these structs.…And let's start implementing our generic solution.…
Author
Released
1/2/2018- Comparing object-oriented programming with protocol-oriented programming
- Methods and class-bound protocols
- Adopting a protocol
- Generics
- Declaring asynchronous behavior
- Preparing and implementing fallback logic
- Implementing an app using protocol-oriented programming
Skill Level Intermediate
Duration
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Introduction
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Welcome1m 3s
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1. Protocol-Oriented Programming
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The object-oriented way7m 28s
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POP vs. OO: The differences3m 50s
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2. Protocols
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What's a protocol?2m 29s
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Adopting a protocol1m 8s
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Polymorphism4m 12s
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Protocol inheritance4m 31s
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Protocol extensions4m 59s
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Protocol composition4m 23s
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3. Generics
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Why generics?1m 31s
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Generic types3m 15s
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Generics and protocols2m 48s
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Constrained associated types2m 51s
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4. Implement the Weather App Using POP
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Weather app design2m 54s
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Project overview1m 53s
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Presenting data4m 18s
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Fallback service3m 24s
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Implement fallback logic4m 3s
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Conclusion
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Next steps45s
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Video: Generic types