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新浪是如何分析处理32亿条实时日志的? - 更多技术 - 清泛网 - 专注C/C++及内核技术

...时日志分析的价值。为用户做好服务也不是修改几个配置文件,调优几个程序运行参数就能搞定的。为了提供更好的服务,我们在下面三个方向做了努力: 一、提升服务质量 我们首先做了Elasticsearch优化,Hardware Level由于我们...
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Alternative for PHP_excel

...ta by Eli Dickinson (Writes SpreadsheetML - the Excel 2003 XML format, and CSV) Oliver Schwarz's php-excel (SpreadsheetML) Oliver Schwarz's original version of php-excel (SpreadsheetML) excel_xml (SpreadsheetML, despite its name)... link reported as broken The tiny-but-strong (tbs) project includes ...
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Boost.Asio的简单使用(Timer,Thread,Io_service类) - C/C++ - 清泛网 - 专注C/C++及内核技术

...时器上进行阻塞等待(blocking wait).实现,我们包含必要的头文件.所有的asio类可以简单的通过include "...目录: 1. 同步Timer 2. 异步Timer 3. 回调函数的参数 4. 成员函数作为回调函数 5. 多线程回调同步 6. TCP客户端:对准时间 7. TCP同...
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Windows x64编程中寄存器的使用 - C/C++ - 清泛网 - 专注C/C++及内核技术

...写 caller stack 机制目的是为了 Debug 所需。 3. 由 callee 保存 在一个程序里应尽量使用 registers,在 x64 里有 16 个通用寄存器和 16 个 xmm 寄存器,可是一些 registers 在使用前必须保存原来值,以防丢失原来值。 因此,在 callee 使...
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SEH stack 结构探索(1)--- 从 SEH 链的最底层(线程第1个SEH结构)说起 -...

...后的堆栈指针(ESP)的值。在我的 VC++ 10.0 版本的 CRT 头文件 except.inc 里找到的定义是: ; exception registration record structure. __EXCEPTIONREGISTRATIONRECORD struc prev_structure dd ? ExceptionHandler dd ? ...
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App Inventor 2 如何下载/保存网络图片? - App Inventor 2 中文网 - 清泛...

App Inventor 2 如何下载/保存网络图片?ai2_down_webpics首先,需要使用Web客户端组件,需要和网络url进行数据交互的场景就要考虑使用它,Web客户端组件在通信连接抽屉中:设置好网络图片的url,然后执行Get方法即可,代码如下:其...
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报错:无法保存屏幕最新代码 - 用户反馈 - 清泛IT社区,为创新赋能!

报错:无法保存屏幕最新代码。
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How should I escape commas and speech marks in CSV files so they work in Excel?

I'm generating a CSV file (delimited by commas rather than tabs). My users will most likely open the CSV file in Excel by double clicking it. My data may contain commas and speech marks, so I'm escaping those as follows. ...
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How do I make a list of data frames?

... is done pretty easily when reading in files. Maybe you've got files data1.csv, data2.csv, ... in a directory. Your goal is a list of data.frames called mydata. The first thing you need is a vector with all the file names. You can construct this with paste (e.g., my_files = paste0("data", 1:5, ".csv...
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How to write DataFrame to postgres table?

...s DB much faster than df.to_sql method and you won't need any intermediate csv file to store the df. Create an engine based on your DB specifications. Create a table in your postgres DB that has equal number of columns as the Dataframe (df). Data in DF will get inserted in your postgres table. ...