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And this is because I don't have something I would really like to have, which is data hiding.
也就是数据隐藏,你们会看到关于,这个概念的很多定义，我认为数据隐藏。
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I'm going to define a class, and in particular, what I'm going to do, is walk through what that says.
我们碰到了一个问题，这个问题就是，我们想要建立，一个抽象数据类型。
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As we all know, this only works if there is a pointee, which kind of gets back to rule number one.
众所周知，只有当有指针数据时，这个才起作用，这有点像第一条规则。
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Perhaps the data rate was a little bit faster than you were accustomed to, but you had some familiarity.
可能这个数据速度,相比你所熟悉的有些快，但是你有一些亲切感。
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In class we'll have more data to present to you and we'll be eager to talk about some of the ways that people will be using the site and what the potential impact will be.
课堂上将会呈现更多的数据,我们渴望谈论,人们用这个网站的方法,以及潜在的影响。
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Four years later, as of today, 76% I think we have about 76% of the Chinese search traffic.
而四年之后的今天，这个数据已经上升到。
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they won't say, "Oh, because of this experiment, that experiment, " this data set and that data set."
他们不会说，“因为理论得到了这个实验，那个实验，这套数据，那套数据的支持“
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.. The equity premium is the-- 2.8% this short-term 2.8% is the riskless return, historically, for a period of almost 200 years.
股权溢价就是-,这个短期无风险投资收益率是，是根据近200年的数据得出的。
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By 1852-53,Boston and New York think about this--Boston-- although we're getting close to that again Boston and New York had 50% foreign-born populations.
在1852年到1853年间,波士顿和纽约,你们听听这个数据,虽然我们现在又快接近这个比例了,那时移民占据波士顿和纽约人口的50%
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We did a study using the Framingham data ourselves several --some years ago where we were interested in the issue of weight cycling.
几年前我们用弗明汉研究的数据做过研究,我们对体重循环这个问题很感兴趣
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It's the various programs you run on your computer along with the various data files that you have saved on your hard drive,and so forth.
是你自身这个电脑中运行的各种程序,硬盘存有的各种数据和文件，类似种种。
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We'll assume that B lives between 0 and a 1/4 and it's known, I just want to be able to vary it later.
假设B是0到1/4之间的已知量,我希望一会能改变一下这个数据
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Again, I don't have data to back this up, but just common sense suggests to me that the common case is if I'm on the subway platform I want to get on that train and maybe I want to get back and where are those two buttons, right?
此外，我没有数据来备份这个，但是常识告诉我，常见的情况是,如果我站在地铁站台上，我想乘上地铁,可能我还想回来,那么哪里能找到这两个按钮，对不？
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So in fact, it is the case, if you look at data, and by the way, that's the way I ended up setting a lot of these parameters and playing with it, was comparing what my simulation said to historical stock data.
所以实际上，在这个例子中，如果你看到数据，顺便说一下，这就是我设置很多变量,然后编程的方式，也就是把我的仿真程序得到的结果,和历史股票数据进行比较。
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x >> Okay. I'll dereference the pointer x 42 to store the number 42 into its pointee.
>，好的，我废除这个指针,在指针数据中存储数字。
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I shouldn't put down a name of a company because I can't reproduce this diagram for Microsoft.
我不应该用这个公司名,因为我没法重现它的数据
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Now we have all this data, and this Aristotelian model is looking goofier and goofier.
现在我们拥有这些数据，这个亚里士多德模型,看起来已经越来越愚蠢了。
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In our--in this particular study we had some people estimate things low and some people estimate things high, but overall, this--these would represent overestimates.
在这个实验中,有些人低估了,而有些人高估了数据,但总体来说,结果显示人们高估了数据
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Instead if we want this pointer to represent the address of something in as much as it points at that address let's just draw an arrow.
如果我们想要让这个指针表示,数据的地址，它指向的地址,我用一个箭头表示。
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Toward the end of the semester, we'll talk about database design.
到这个学期的期末，我们会讨论数据库的设计。
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> No, this doesn't touch the pointees.
>，不会，这个不会触及到指针数据。
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I made sure I had the particular type.
我确定了我获得的是这个类型的数据。
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That's what I got using this sample period.
这就是用这个取样期间的数据得出的结果。
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Where do I have that here?
我找找这个数据
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I don't have the latest data -this is from 1998 -but there were 11,000 credit unions -that's the number of credit unions in the United States in 1998 -and there were only 9,000 commercial banks; that's the number of banks.
我手上没有最新的数据,这个是1998年的,共有11000个信用合作社,这是1998年全美信用合作社的数量,与此同时,商业银行只有9000家,这是银行的数量
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So historically, the course is a lot of sophomores who, like me perhaps, are realizing that they finally have time to explore beyond their own interests.
从往年数据上可以看出，上这个课程的大都是大学二年级的学生，可能跟当时的我一样，开始认识到我们终于有时间,来探究我们兴趣以外的事情。
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String is actually not a data type in C. It actually is something called a char star and we'll come back to this before long.
字符串在C语言里其实不是一种数据类型,而是一种称为char，*的数据类型,这个知识点我以后会讲到。
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They had a little bit of a problem around World War II and you can try to bridge the gap, but--anyway, there are people who have tried to sort this out.
他们在二战期间的数据可能有所缺失,不过可以试着弥补这个缺失,但是,无论如何,仍然有人想方设法整理这些数据
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This is true whether you look at the universe of the mutual fund managers that we might have available to us as individuals or whether it's institutional data, such as those that I just cited; that concept is survivorship bias.
的确如此,不论你在观察,可接触到的基金经理个人,还是观察一些机构数据,就像我刚引用过的那些,这个现象就是生存偏差
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And then LLD, we'll see in a moment, this is for particularly long numbers which will become relevant especially as you're trying to process lots of information.
然后是lld，我们等会就会看到，这个代表长整型数据,它是相当重要的，特别是当你需要,处理大量信息的时候。
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