Join Scott Gardner for an in-depth discussion in this video Work with generics, part of Swift 3 Essential Training: Beyond the Basics.
- [Instructor] I'm starting out…with the definition of a struct thing…with a title property and a custom initializer to set it.…And three array constants, a numbers array of type int,…a strings array of type string,…and a things array of the class type thing.…I want to create a type that can hold any of these arrays…and return a random item from the array.…First, I'll define a class item holder.…I'll need to define a generic type parameter…to use in the definition.…I'll use T which is commonly used in practice.…
Now I'll define an items array property of type T…and an initializer to set it.…And I'll define a method random item that returns a type T…using arc for random uniform…to generate a random index for the items array…and then return that element at that index.…Now I can create instances of item holder…such as a numbers holder to hold the numbers array…and a things holder to hold the things array.…
Numbers holder is inferred to be an item holder of type int…because the numbers array is an array event…and things holder is inferred…
- Adding source files, resources, links, and literals
- Adding pages to a playground
- Using overflow operators and bitwise operators
- Using ranges with strings
- Creating complex sequences
- Chaining higher-order functions
- Defining lazy properties
- Using failable initializers
- Mutating methods
- Working with singletons
- Nesting function types
- Creating error types and recursive enumerations
- Extending concrete types
- Referencing selectors and key paths
- Working with protocol-oriented programming
- Defining class-only protocols and optional protocols
- Using option sets, type checking, and casting operators
Skill Level Intermediate
Core Data for iOS and macOS Enterprise Developerswith Jon Bott1h 46m Intermediate
Distributing Your iOS App for Testing with TestFlightwith Ron Buencamino35m 10s Intermediate
iOS App Development: Test-Driven Developmentwith Harrison Ferrone2h 14m Intermediate
3. Strings and Characters
4. Sequences and Collections
5. Control Flow
6. Value and Reference Types
9. Access Control
Understand access control3m 47s
Next steps1m 2s
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