design idea of oop 面向对象的程序设计思想
There is a misunderstanding that UML is only applicable to OOP design and implementation.
很多人对于UML有一种错误的理解，认为它仅仅用于OOP 的设计实现。
The singleton pattern is probably one of the most often used OOP design patterns; it restricts the number of object instances of a class to one.
单例模式可能是最常用的OOP设计模式之一了；它限制了一个类的对象实例数只能为1。
OOP design patterns can offer great advantages such as re-usability, modularity, and maintainability, but it may not be obvious how our web application can benefit from these features.
面向对象的设计模式，可以提供诸如重新很大的优势，可用性，模块化和可维护性，但它可能不是很明显我们的Web应用程序如何能够受益于这些功能。
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