How do the Proxy, Decorator, Adapter, and Bridge Patterns differ?
I was looking at the Proxy Pattern, and to me it seems an awful lot like the Decorator, Adapter, and Bridge patterns. Am … Read more
design-patterns
ViewPager and fragments — what’s the right way to store fragment’s state?
Fragments seem to be very nice for separation of UI logic into some modules. But along with ViewPager its lifecycle is still misty … Read more
Why create “Implicitly Unwrapped Optionals”, since that implies you know there’s a value?
Why would you create a “Implicitly Unwrapped Optional” vs creating just a regular variable or constant? If you know that it can be … Read more
MVC pattern on Android
Is it possible to implement the model–view–controller pattern in Java for Android? Or is it already implemented through Activities? Or is there a … Read more
Is there a simple, elegant way to define singletons? [duplicate]
This question already has answers here: Creating a singleton in Python (33 answers) Closed 3 years ago. There seem to be many ways … Read more
What is the basic difference between the Factory and Abstract Factory Design Patterns? [closed]
Closed. This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so … Read more
What’s an Aggregate Root?
I’m trying to get my head around how to properly use the repository pattern. The central concept of an Aggregate Root keeps coming … Read more
On design patterns: When should I use the singleton?
The glorified global variable – becomes a gloried global class. Some say breaking object-oriented design. Give me scenarios, other than the good old … Read more
Dependency Injection vs Factory Pattern
Most of the examples quoted for usage of Dependency Injection, we can solve using the factory pattern as well. Looks like when it … Read more
What are the differences between Abstract Factory and Factory design patterns?
I know there are many posts out there about the differences between these two patterns, but there are a few things that I … Read more