DesignPatterns
Notes for different design patterns in programming. This aplies to almost any language but I am focusing on C# and .NET.
SOLID Design Principles
- Introduced by Robert C. Martin (aka: Uncle Bob)
See Projects with related names for a code example. I am keeping all code in one file on purpose. To keep projects in groups and keep things simple for demonstration.
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Single Responsibility
- A single class should have one reason to change
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Open-Closed Principle
- Open for extension closed for modification
- we shouldn't need to modify existing code. we can use inheritence, with interfaces
- in our code we get asked to add more filters on a products page. We are going to use the "Specification Pattern" (not gang of four but considered an enterprise pattern).
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Liskov Substitution Principle
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which describes the fundamental nature of data abstraction, and is used in type theory (see subtyping) and in object-oriented programming (see inheritance). Her work was recognized with the 2008 Turing Award, the highest distinction in computer science. (named after Barbara Liskov)
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we should be able to substitute a base type for a sub type.
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Interface Segregation Principle
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Dependency Inversion Principle
Creational
- Builder
- Factories
a. Abstract Factory
b. Factory Method
- Prototype
- Singleton
Structual
- Adapter
- Bridge
- Composite
- Decorator
- Facade
- Flyweight
- Proxy
Behavioral
- Chain of Responsibility
- Command
- Interpreter
- Iterator
- Mediator
- Memento
- Null Object
- Observer
- State
- Strategy
- Template Method
- Visitor