课程: Programming Foundations: Design Patterns
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What are design principles?
- [Instructor] Although this course is about design patterns, you'll also find it beneficial to learn a set of object-oriented design principles. These principles go beyond the object-oriented basics you already know, like inheritance, polymorphism, abstraction, and encapsulation. And these principles really give you a set of guidelines that will help you to avoid bad object-oriented design. These might be designs that are too rigid, inflexible, too fragile, too hard to understand. You might be saying to yourself that sounds a lot like a design pattern, and they do share a common goal, good object-oriented design. But principles and patterns are different. Principles are general guidelines while patterns are specific design solutions often aimed at solving common object-oriented problems. As we see more of each, you'll start to understand the difference. Let's look at one example of an important principle we'll be…
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