Join Scott Gardner for an in-depth discussion in this video Sequences and collections, part 2, part of Swift 3 Essential Training: Beyond the Basics.
- [Instructor] I'll keep going on the same exercise file,…although I've added a couple of arrays and string values…that I'll be using in this video.…There are multiple prefix methods…for working with collections.…Prefix Up To will return a new subsequence…that is an array slice in this example…of the array it's called on…from the starting element up to but not including…the specified index.…This is the same as the half open range operator.…
It's counterpart, Prefix Through,…will include the element at the specified index,…which is the same as using a closed range operator.…Both of these methods will generate an error…if you provide an out of range index, though.…I'll undo that.…However, the base prefix method takes a max length parameter…and it will return an array slice from the first element…to the specified number of elements,…or all the elements,…whichever is less.…
In other words, it won't generate an error.…For this reason, you may find using this prefix method…to be safer than using the other two,…or range operator, for that matter,…
- 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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