Join Jungwoo Ryoo for an in-depth discussion in this video Bridge, part of Python: Design Patterns.
- The bridge pattern helps untangle an unnecessary complicated class hierarchy, especially when implementation specific classes are mixed together with implementation-indendent classes. So our problem here is that there are two parallel or orthogonal abstractions. One is implementation-specific, and the other one is implementation-independent.
And our scenario involves this implementation-independent circle abstraction and implementation-dependent circle abstraction. The implementation-dependent circle abstraction involves how to draw a circle, and implementation-independent circle abstraction involves how to define the properties of a circle and scale it. The key to our solution is not trying to abstract both implementation-specific and implementation-independent classes in a single class hierarchy.
The abstract factory and adaptor patterns are the related patterns to this rich design pattern.
- Understanding design patterns
- Best design practices: consistency, completeness, and correctness
- Working with creational patterns
- Working with structural patterns
- Working with behavioral patterns
Skill Level Intermediate
Q: In the strategy pattern example, why does the code keep executing the default function rather than the alternate?
A: The programming demonstration skips the step of defining what the strategy pattern should be when an alternate function name is provided
as an argument as shown below.
Programming Foundations: Design Patternswith Elisabeth Robson2h 19m Intermediate
1. Understanding Design Patterns
2. Creational Patterns
3. Structural Patterns
4. Behavioral Patterns
5. Design Best Practices
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