-
On Thursday, we'll look at why that allows you to do lots of things more conveniently than you can do without mutation.
周四我们会探讨下,为什么这种可变性会让你,在进行很多操作的时候方便了许多。
-
These things run for variable amounts of time because they take input, a list of size of some amount.
而这一段的执行时间是可变的,因为它们需要输入一个包含一些元素的列表。
-
Well now we're going to talk about some mutable types. Things you can change.
那我们接下来要去学习一些可变的类型,我们以一个可能你们大多数人。
-
We talked about the inevitability of death; we talked about the variability, that people have different lengths of time before they die.
我们讨论过了死亡的不可避免性;,我们讨论过了其可变性，不同的人在他们死之前有所的时间长度不同。
-
So the big three People who are similar to you, people who are already familiar to you, people who are nearby in space.
三大可变因素,相似性，熟悉度，空间接近性。
-
What's variable about them is that they bind to a specific antigen.
它们可变的原因是,它们需要结合不同的抗原
-
There's something called "variable life," which refers to a life insurance policy where the policyholder can make decisions about the investment of the money in the whole life policy.
有种保单叫做"可变寿险",作为终身寿险的一种,投保人可以自主选择,在终身寿险上进行多少投资
-
But in fact, logically speaking at least, variability, although it's a requirement for unpredictability, doesn't guarantee unpredictability.
但实际上，至少在逻辑上讲，可变性虽然是不可预见性的必要条件，但是不可预见性却不是必然。
-
It's extremely powerful, but what we haven't seen yet is mutation.
这确实很强大，但是我们还没有说到可变性呢。
-
And I pointed out that lists are mutable, showed you some examples of mutation.
我提到了数组是可变的，并给你们举了一些例子。
-
And you'll see as we go through the other big-- the other two "big three" that there is a kind of repetition of this theme.
你们将发现-,在我们讨论其他两大可变因素的时候“,主题上有些重合。
-
Or a list of anything that could be mutable.
或者是包含其它有可变的结果的链表。
-
Now, you might think, ? well, didn't we already discuss that when we started thinking about variability?
现在你可能会想，我们不是已经谈过这个了吗,就在我们开始讨论死亡可变性的时候？
-
In our world, not only do we have variability, we've got unpredictability.
在我们的世界不仅有可变性，还有不可预见性。
-
In addition to the inevitability, in addition to the variability, in addition to the unpredictability, there's the fact that death is, as I like to think of it, ubiquitous.
除了不可避免性之外，除了可变性之外，除了不可预知性之外，还有个事实便是死亡，是无处不在的，正如我所想的那样。
-
But you see the difference. Great question, and a very important thing to understand, and that's why I'm belaboring this point, since this is where people tend to get pretty confused, and this is why mutation is very important to understand. Yeah.
但是你们已经发现区别了，这问题挺好的，并且有重要的一点需要我们去注意的是，人们经常对可变性这一点感到很迷惑，但是可变性是很重要的,我们需要理解它,这也是我经常强调这一点的原因。
-
The parts at the end of the Y's are variable.
形的末端部分是可变的
-
And for that matter, there could still be variability.
虽然如此，这里仍然可以存在可变性。
-
But let's quickly talk about the big three.
首先，我们快速地说说三大可变因素。
-
We've had inevitability; we had variability.
我们讨论过了死亡的必然性;,死亡的可变性。
-
What about the variability of death?
死亡的可变性又如何？
-
But in keeping with the focus of our discussion about the badness of death, I want to put aside the moral question ? and think about how good or bad for me ? is it that there's variability in death?
但是为了重点讨论,死亡的坏处，我要撇开道德问题不谈,转而考虑这种情况对我是好是坏,如果死亡有可变性的话？
-
Lists differ from strings in two ways; one way is that it's mutable, the other way is that the values need not be characters. They can be numbers, they can be characters, they can be strings they can even be other lists.
有两个不同之处，一个在于数组是可变的;,另一点在于数组里面的值，不一定是字符,可以是数，可以是字符,也可以是字符串,甚至可以是其他的数组。
-
But if we could statistically control for every other variable, all I'd need to do is measure the distance from your door to everybody else's door on campus and I could chart out who's going to fall in love with whom on the Yale campus.
如果我们能精确地控制其他可变因素，那么只需要测测距离,你宿舍门到其他宿舍门的距离,我就能够计算出,校园里谁爱上了谁。
-
Because notice that what remove did, it was it actually changed the list.
可变性了对不对？,请注意remove操作。
应用推荐