Join Scott Gardner for an in-depth discussion in this video Chain higher-order functions, part of Swift 3 Essential Training: Beyond the Basics.
- [Instructor] I'm starting out with…an import of Foundation and a phrase string.…I'll work with the characters of the phrase string…to test the phenomena known as typoglycemia,…that is, a reader can understand the meaning of words…in a sentence even when the interior letters…of each word are scrambled.…First, I'll define a constant scrambleword…to hold a closure.…And I'll explicitly define it to take…a string input parameter, and return a string.…
Within the closure, I'll write a guard statement…to ensure that the string has at least three characters,…or else just return the string,…because I'm only going to scramble…the internal characters, not the first and last.…So, if there's only one internal character,…there's nothing to scramble.…Next, I'll define some local values.…First, a characters array of the string's characters.…Then I'll define middleCharacters,…which will be a subarray of the characters array,…from 1, that is the second character,…to, but not including, the last character, count - 1.…
And finally, I'll define count…
- 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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