ToString method, which has become the de-facto standard for type checking, proves to be consistent in this regard for both null and undefined:.
使用类型检查操作符(is)来检查一个实例是否属于一个特定的子类。
Use the type check operator(is) to check whether an instance is of a certain subclass type..
静态语言在通过类型检查查找错误时一般更严格,并且需要更多的代码来构建一个原型。
Static Language areusually more strict with catching errors type checking, and it takes more code to build a prototype.
使用类型检查运算符(is)来检查实例是否属于某个特定子类型。
Use the type check operator(is) to check whether an instance is of a certain subclass type..
我们可以通过比较类型检查机制、对不同程序设计模型的支持以及所支持的对象模型来区别不同的OOP语言。
We can discriminate among different OOP languages comparing type checking mechanisms, the ability to support different programming models, and the object model they support.
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