声明类时,通常将成员变量声明为private,以防止直接访问成员变量而引起的恶意操作。
访问器模式如图 2 所示。
这样就能保证访问器访问了整个层次树。
This ensures that the visitor will visit the entire hierarchy.
访问器和拦截器将在本文档的后面讨论。
Accessors and interceptors are discussed later in this document.
Have the computational hygiene, if you like, to only go through accessors, only go through methods that are actually provided to you as you do this.
请大家注意计算卫生,如果你喜欢这么说的话,只通过访问器访问数据,当你访问数据的时候,通过提供给你的方法来访问。
So p dot Cartesian is a kind of accessor, it's getting access to the data.
这就是为什么,我想要使用访问器的原因。
It's perfectly legal in Python to type that in and get the value back out.
正如我所说的,我更希望用一个,我刚刚写的访问器。
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