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returning in the middle of a using block

...(var textwriter = new StreamWriter(memoryStream)) { using (var csv = new CsvWriter(textwriter)) { //..write some stuff to the stream using the CsvWriter return memoryStream.ToArray(); } } } I was passing in a DataTable to be outputted as csv....
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Combine Date and Time columns using python pandas

...ou may have been able to read this in directly e.g. if you were using read_csv using parse_dates=[['Date', 'Time']]. Assuming these are just strings you could simply add them together (with a space), allowing you to apply to_datetime: In [11]: df['Date'] + ' ' + df['Time'] Out[11]: 0 01-06-2013...
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CentOS 6.4下Squid代理服务器的安装与配置 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...,代理服务器需要设置防火墙策略将客户机的Web访问数据交给代理服务程序处理; 反向代理:是指以代理服务器来接受internet上的连接请求,然后将请求发给内部网络上的服务器,并将从服务器上得到的结果返回给internet上...
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Sorting multiple keys with Unix sort

... Here is one to sort various columns in a csv file by numeric and dictionary order, columns 5 and after as dictionary order ~/test>sort -t, -k1,1n -k2,2n -k3,3d -k4,4n -k5d sort.csv 1,10,b,22,Ga 2,2,b,20,F 2,2,b,22,Ga 2,2,c,19,Ga 2,2,c,19,Gb,hi 2,2,c,19,Gb,hj 2,...
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Pandas every nth row

...came up with when using the index was not viable ( possibly the multi-Gig .csv was too large, or I missed some technique that would allow me to reindex without crashing ). Walk through one row at a time and add the nth row to a new dataframe. import pandas as pd from csv import DictReader def make_...
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绘画动画组件 · App Inventor 2 中文网

...) 在画布上给定坐标处绘制一个点。 画多边形(坐标点列表,填充) 在画布上绘制多边形。 坐标点列表 应该是一个包含子列表(其中两个数字代表坐标)的列表。 第一个点和最后一个点不需要相同。例如 ((x1 y1) (x2 y2) ...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...“MAKECMDGOALS”,这个变量中会存放你所指定的终极目标的列表,如果在命令行上,你没有指定目标,那么,这个变量是空值。这个变量可以让你使用在一些比较特殊的情形下。比如下面的例子: sources = foo.c bar.c ifneq ( $(MAKECM...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...“MAKECMDGOALS”,这个变量中会存放你所指定的终极目标的列表,如果在命令行上,你没有指定目标,那么,这个变量是空值。这个变量可以让你使用在一些比较特殊的情形下。比如下面的例子: sources = foo.c bar.c ifneq ( $(MAKECM...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...“MAKECMDGOALS”,这个变量中会存放你所指定的终极目标的列表,如果在命令行上,你没有指定目标,那么,这个变量是空值。这个变量可以让你使用在一些比较特殊的情形下。比如下面的例子: sources = foo.c bar.c ifneq ( $(MAKECM...
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Makefile经典教程(入门必备) - C/C++ - 清泛网 - 专注IT技能提升

...“MAKECMDGOALS”,这个变量中会存放你所指定的终极目标的列表,如果在命令行上,你没有指定目标,那么,这个变量是空值。这个变量可以让你使用在一些比较特殊的情形下。比如下面的例子: sources = foo.c bar.c ifneq ( $(MAKECM...