When you call a function, what actually happens is that function gets its own chunk of memory that's identical in size to the data type that it expects.

当你调用一个函数，实际上发生的是,函数得到了自己的内存块，相同的类型,是占有一样大小的内存的。

哈佛公开课 - 计算机科学课程节选

Well the idea of a hash, in fact, what's called a hash function is to have some way of mapping any kind of data into integers.

我要怎么做？实际上想法还是哈希,通过一个哈希函数,把任何种类的数据都映射成整数。

麻省理工公开课 - 计算机科学及编程导论课程节选

Sometimes the functions -- sometimes a function can be used on multiple data types, plus, for example, we saw could add strings, or could add ints, but each one of those data types has associated with it a set of functions that are geared to handling them.

比如说，我们可以对string类型,进行add操作,也可以对int类型进行这个操作，但是这些数据类型中的每一种，都与适合于操作它们的,方法集相关联,我们想对我们创建的数据,类型做同样的事情。

麻省理工公开课 - 计算机科学及编程导论课程节选