In this challenge solution video, learn how to use Swift's for/in statement, an example of a statement that hides the iterator pattern under the covers.
(upbeat music) … - [Narrator] For our challenge solution, … we chose the Swift programming language. … And Swift aggregate objects, … like arrays and sets and dictionaries, are all sequences, … and they all provide built-in iterators. … You can use the for in statement, … like we're doing here in the short example, … that iterates over an array of animals. … Or you can use the underlying iterator … supplied by the sequence … and use that iterator's interface to iterate. … However, most of the time, … you'll just use the for in statement. … …
- What are design patterns?
- Encapsulating code that varies with the Strategy pattern
- The limitations of inheritance
- Using the Adapter pattern
- Implementing the Observer pattern
- Extending behavior with composition and the Decorator pattern
- Encapsulating iteration with the Iterator pattern
- Object creation with the Factory Method pattern
- Using design principles to guide your object-oriented design
Skill Level Intermediate
1. Design Patterns
2. The Strategy Pattern
3. The Adapter Pattern
4. The Observer Pattern
Using the Observer pattern2m 23s
5. The Decorator Pattern
6. The Iterator Pattern
7. The Factory Patterns
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