JavaScript / jQuery为什么这不起作用？(JavaScript / jQuery why doesn't this work?)

 由于one是ArrayList，因此只能将它作为参考传递。 你现在显然将它作为引用来引用构造函数。 你可能不需要那个ref 。 
 
 但是请展示你想要完成的更完整的想法。 
 
 编辑： 
 
 看完你的C课后，不需要ref 。 c将共享A调用的ArrayList的实例。 
 
 这似乎归结为.NET中的一般referencetype / valuetype问题。 总结： 
 
 
 
 对象的实例没有名称，并且根本无法（物理上）作为参数传递。 
 
 
 你总是通过引用访问实例。 在你的代码中， one （2x）， two local都是对Arraylist实例的引用。 
 
 
 引用本身的行为类似于值类型，即赋值意味着复制。 
 
 
 要了解有关referencetypes / valuetypes的更多信息，请搜索“复制语义”，并避免以'valueetypes存在于堆栈中'为开头的帖子。 

Since one is an ArrayList, you can only pass it as a reference. You are now apparently passing it as a reference-to-a-reference to the constructor. You may not need that ref.
 
But please show a more complete idea of what you are trying to accomplish. 
 
Edit:
 
After seeing your C class, there is no need for the ref. c will share the instance of the ArrayList that A calls one.
 
This seems to boil down to the general referencetype/valuetype issue in .NET. To summarize:
 
 
 
instances of objects do not have a name and cannot (physically) be passed as parameter at all.
 
 
you always access an instance through a reference. In your code, one (2x) , two, local are all references to Arraylist instances. 
 
 
the references themselves behave like valuetypes, ie assignment means copying.
 
 
To learn more about referencetypes/valuetypes, search for 'copy semantics' and avoid postings that start with 'valuetypes exist on the stack'.