And then, if I want to find out if something's there, I do the same thing. But notice now, hash is converting the input into an integer.

然后，我想查找出某些元素是否在列表中,我做同样的事，但是现在注意，哈希是将输入转化成一个整数，所以，其思想是什么？

麻省理工公开课 - 计算机科学及编程导论课程节选

There's been a lot of work done on these over the years, but in fact, it's pretty hard to invent a good hash function. So my advice to you is, if you want to use something was a hash, go to a library. Look up a good hash function.

已经做过了很多的尝试和努力,但是事实是，很难发明出一个好的哈希函数,所以我给你们的建议是,如果你们想使用哈希功能,到函数库中查找一个好的哈希函数。

麻省理工公开课 - 计算机科学及编程导论课程节选

So what in the world is hashing?

所以哈希到底是什么样的？

麻省理工公开课 - 计算机科学及编程导论课程节选