We want to create data types and functions, or we're going to call them methods, that are specifically aimed at manipulating those kinds of objects.
它们是特定的,用来操作那些对象的,我们的目标基本上来说,就是会去看看怎么去构建,能利用这种模块话。
And if you think about it, associated with each - one of those data types is a set of functions it's intended to apply to.
你会发现每个类型都有,与之对应的一个集合的操作,有的时候这些操作,有的时候某个操作可以,应用于多种数据类型。
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