设计模式和设计原则之间有什么区别? [英] What's the difference between design patterns and design principles?
问题描述
我是Ruby on Rails的新手，并且阅读了这些文章.
I'm new to Ruby on Rails, and I went through these articles.
- Design Patterns in Ruby: Observer, Singleton
- Design Patterns in Ruby
但是我无法理解设计模式和设计原则之间的实际区别. 有人可以解释一下区别吗?
But I couldn't understand the actual difference between design patterns and design principles. Could someone please explain the distinction?
推荐答案
设计原则:
设计原则是我们在设计软件时应遵循的核心抽象原则.请记住，它们不是具体的，而是抽象的.只要我们在允许的条件内，它们便可以以任何语言，在任何平台上应用，而不论状态如何.
Design Principles:
Design principles are core abstract principles which we are supposed to follow while designing software. Remember they aren't concrete - rather abstract. They can be applied on any language, on any platform regardless of the state as long as we are within the permissible conditions.
示例:
- 封装变化的内容.
- 用于接口的程序，而不是用于实现的程序.
- 取决于抽象.不要依赖具体的类.
它们是不断出现的现实世界问题的解决方案，因此，我们无需重新发明轮子，而是遵循经过充分验证，被他人测试并且可以安全遵循的设计模式.现在，设计模式是特定的.仅在条款和条件中可以应用设计模式.
They are solutions to real world problems that pop up time and again, so instead of reinventing the wheel, we follow the design patterns that are well-proven, tested by others, and safe to follow. Now, design patterns are specific; there are terms and conditions only in which a design pattern can be applied.
示例:
-
单一模式(一个类一次只能有一个实例)
Singleton Pattern ( One class can only have one instance at a time )
适配器模式(不同类的匹配接口)
Adapter Pattern ( Match interface of different classes )
以下类比可以帮助您更好地理解差异:
The following analogy will help you understand the difference better:
原理:我们应该教别人，以教育自己和他人，并总体上使我们的国家成为进步的国家.
Principle: We should teach others in order to educate ourselves as well as others, and overall make our nation a progressive nation.
模式:在我们的国家/地区，每位医学毕业生都应该在一个遥远的村庄里教6个月才能完成学位.
Pattern: In our country, each medical doctor graduate is supposed to teach 6 months in a far-away village to complete his/her degree.
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