For this second video, Reynald continues reviewing the code example of traversing through a collection of reporters from two companies. Here the student should get a good understanding of the Iterator and the concrete iterator and how they work together using implementations such as First, Next, IsDone & CurrentItem. Lastly, Reynald reviews the code of the client that executes the demo.
So we just reviewed the code that's in our Aggregate folder.…Let's take a look at the code within the Iterator…folder now.…First, I'd like to open up the file IIterator.…Within here we simply have an interface called IIterator,…and the signatures consist of First which returns a void,…Next which returns a string, a boolean called IsDone,…and a CurrentItem which will be returning a string.…First simply sets the current element to the first element.…
Next advances a current element to the next one.…IsDone basically checks to see if the collection is at the…end,…and CurrentItem returns the existing element.…The current element that has a focus.…Let's open up LA Paper Iterator.…LA Paper Iterator inherits from IIterator,…and you'll notice we have a couple of private variables.…One for reporters, and one that keeps track of the…current element.…
Then we have a few methods;…LA Paper Iterator, CurrentItem,…First, IsDone,…Next.…These are the implementations for what we just saw in the…iterator.…Here is where the differences come in because the way that…
Author
Reynald Adolphe
Released
5/31/2016In this course, developer and technologist Reynald Adolphe explains the purpose and effective use of eight design patterns, including six Gang of Four design patterns and two .NET patterns. Gang of Four patterns fall under three categories: structural, creational, and behavioral. Reynald helps you learn about select patterns from each category. He describes each pattern and demonstrates how programmers can leverage them in real-world applications.
- Factory Method
- Abstract Factory
- Singleton pattern
- Decorator pattern
- Iterator pattern
- Observer pattern
- Repository pattern
- Unit of Work pattern
Skill Level Intermediate
Duration
Views
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Introduction
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Welcome1m 28s
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1. Overview
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Design patterns explained1m 20s
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The need for design patterns1m 31s
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Design pattern categories1m 35s
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2. Factory Method
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Factory pattern overview1m 36s
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Code the Factory pattern4m 16s
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3. Abstract Factory
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4. Singleton Pattern
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Singleton pattern overview1m 44s
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Thread safety2m 42s
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5. Decorator Pattern
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Decorator pattern overview2m 54s
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Concrete Component code2m 37s
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Concrete Decorator code2m 42s
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6. Iterator Pattern
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Aggregate setup2m 7s
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Iterator setup and execution4m 53s
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7. Observer Pattern
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Observer pattern overview2m 23s
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Concrete Subject code3m 23s
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8. Repository Pattern
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MVC Project setup8m 14s
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Create a Generic Repository2m 16s
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9. Unit of Work Pattern
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Convert to Unit of Work3m 53s
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Conclusion
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Next Steps31s
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Video: Iterator setup and execution