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Excel RTD(Excel Real-Time Data)实时刷新数据技术 - C/C++ - 清泛网 - 专注C/C++及内核技术

...是否总是获取最新数据,如果这个参数传入true,则每次保存Excel文档以后,再次重新打开时,看到的不一定是上次保存时的数据,而是最新的实时数据,这也是一个引用类型的参数。 每当一个新的主题(Topic)被应用到Excel,Con...
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Django - how to create a file and save it to a model's FileField?

...s certainly a good solution, but here is the way I went about generating a CSV and serving it from a view. Thought it was worth while putting this here as it took me a little bit of fiddling to get all the desirable behaviour (overwrite existing file, storing to the right spot, not creating duplica...
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How can I convert comma separated string into a List

...ad of throwing an exception), here's something that uses TryParse: string csv = "1,2,3,4,a,5"; int mos = 0; var intList = csv.Split(',') .Select(m => { int.TryParse(m, out mos); return mos; }) .Where(m => m != 0) .ToList(); //return...
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MFC学习总结 (90个技巧) dlg 上建立View - C/C++ - 清泛网 - 专注C++内核技术

...CpropertyPage继承;然后在要添加该对话框为 属性页的类(头文件)里创建CpropertySheet类的一 [page]属性页的添加[/page]1.属性页的添加: 创建对话框的类,该类要从CpropertyPage继承;然后在要添加该对话框为 属性页的类(头文件)里...
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java中的缓存技术该如何实现 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...一般的划分方法是从技术上划分,可以分成几种,内存,硬盘文件.数据库. (1) 内存.将缓存放在内存中是最快的选择,任何程序直接操作内存都比操作硬盘要快的多,但是如果你的数据要考虑到break down的问题,因为放在内存中的数据我...
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Convert floats to ints in Pandas?

I've been working with data imported from a CSV. Pandas changed some columns to float, so now the numbers in these columns get displayed as floating points! However, I need them to be displayed as integers, or, without comma. Is there a way to convert them to integers or not display the comma? ...
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Way to read first few lines for pandas dataframe

Is there a built-in way to use read_csv to read only the first n lines of a file without knowing the length of the lines ahead of time? I have a large file that takes a long time to read, and occasionally only want to use the first, say, 20 lines to get a sample of it (and prefer not to load the...
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数据挖掘——分词入门 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

...匹配上了就赋值 matchPos = matchPosTmp; //同时保存好匹配位置 } i++; } if (!matchWord.isEmpty()) { //有匹配结果就输出最大长度匹配字符串 j = matchPos; ...
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Converting Select results into Insert script - SQL Server [closed]

... part i --have used below variable ------@CSV_COLUMN------- values(Col1 data in quote, Col2..quote,..Col5..quote) -- To achieve this part -- i.e column data in --quote i have used --below variable ----@QUOTED_DATA--- C)To get above data from existing table ...
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Good reasons NOT to use a relational database?

..., but with a bit more ability to validate the structure. Spreadsheet / CSV file Very easy model for business users to understand Subversion (or similar disk based version control system) Very good support for versioning of data Berkeley DB (Basically, a disk based hashtable) Very s...