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Best timestamp format for CSV/Excel?
I'm writing a CSV file. I need to write timestamps that are accurate at least to the second, and preferably to the millisecond. What's the best format for timestamps in a CSV file such that they can be parsed accurately and unambiguously by Excel with minimal user intervention?
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C语言结构体里的成员数组和指针 - C/C++ - 清泛网 - 专注C/C++及内核技术
...玩法——相对于C++来说，C++编译器帮你管了继承和虚函数表，语义也清楚了很多）
指针和数组的差别
有了上面的基础后，你把源代码中的struct str结构体中的char s[0];改成char *s;试试看，你会发现，在13行if条件的时候，程序因为...
Large, persistent DataFrame in pandas
...ldn't run out of memory, but there are currently memory problems with read_csv on large files caused by some complex Python internal issues (this is vague but it's been known for a long time: http://github.com/pydata/pandas/issues/407).
At the moment there isn't a perfect solution (here's a tediou...
How to export query result to csv in Oracle SQL Developer?
...ying to figure out how to export a query result to a text file (preferably CSV). Right clicking on the query results window doesn't give me any export options.
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float64 with pandas to_csv
I'm reading a CSV with float numbers like this:
2 Answers
2
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C#操作XML小结 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...所有子节点
{
XmlElement xe=(XmlElement)xn;//将子节点类型转换为XmlElement类型
if(xe.GetAttribute("genre")=="张三")//如果genre属性值为“张三”
{
xe.SetAttribute("genre","update张三");//则修改该属性为“update张三”
XmlNodeList nls=xe.C...
How to write header row with csv.DictWriter?
Assume I have a csv.DictReader object and I want to write it out as a CSV file. How can I do this?
3 Answers
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C语言面试那些事儿──一道指针与数组问题 - C/C++ - 清泛网 - 专注C/C++及内核技术
...，指针运算规则，指针类型，int型长度，指针长度，类型转换…这些概念如果有一个及以上不是那么太清楚的话，很容易答错。
为方便讨论，先开始理解如下关系：
以下是某次在Ubuntu 10.10-desktop-i386 + gcc 4.4.5的运行结果：
size ...
还原MongoDB中Decimal类型数据 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...Decimal类型，我们要将C#的Decimal类型数据存入MongoDB，只能转换为Double类型存储。但是，取出来的数据（原数据...问题描述：
由于MongoDB没有Decimal类型，我们要将C#的Decimal类型数据存入MongoDB，只能转换为Double类型存储。
但是，取...
How do you create nested dict in Python?
I have 2 CSV files: 'Data' and 'Mapping':
4 Answers
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