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vs2010编译boost若干问题解决 - 开源 & Github - 清泛网 - 专注C/C++及内核技术

....52.0版。 按照说明,直接运行“bootstrap.bat”,报“‘cl'不是内部或外部命令”的错误,于是在环境变量中添加了cl.exe的路径——“C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\bin\x86_ia64”。再次运行“bootstrap.bat”,提示找不到“...
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理解和配置 Linux 下的 OOM Killer - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术

理解和配置 Linux 下的 OOM Killerhow-to-configure-the-linux-oom-killer最近有位 VPS 客户抱怨 MySQL 无缘无故挂掉,还有位客户抱怨 VPS 经常死机,登陆到终端看了一下,都是常见的 Out of memory 问题。这通常是因为某时刻应用程序大量请求 最...
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Ora-00257 错误处理一列 - 数据库(内核) - 清泛网 - 专注C/C++及内核技术

...一列sqlplus assysdba报错ORA-12162切回系统确认系统当前的ORACLE_HOME和ORACLE_SID环境变量[oracle@asdlabdb01~]$echo$ORACLE_HOME空的[oracle...sqlplus /as sysdba 报错ORA-12162 切回系统 确认系统当前的ORACLE_HOME和ORACLE_SID环境变量 [oracle@asdlabdb01 ~]$ echo $...
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Python中的X[:,0]和X[:,1] - 大数据 & AI - 清泛网 - 专注C/C++及内核技术

Python中的X[:,0]和X[:,1]X[:,0]是numpy中数组的一种写法,表示对一个二维数组,取该二维数组第一维中的所有数据,第二维中取第0个数据,直观来说,X[:,0]就是取所有 X[:,0]是numpy中数组的一种写法,表示对一个二维数组,取该二维...
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Initialize a nested struct

I cannot figure out how to initialize a nested struct. Find an example here: http://play.golang.org/p/NL6VXdHrjh 8 Answers...
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Is there a standard sign function (signum, sgn) in C/C++?

I want a function that returns -1 for negative numbers and +1 for positive numbers. http://en.wikipedia.org/wiki/Sign_function It's easy enough to write my own, but it seems like something that ought to be in a standard library somewhere. ...
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What is “:-!!” in C code?

I bumped into this strange macro code in /usr/include/linux/kernel.h : 5 Answers 5 ...
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了解 Boost Filesystem Library - C/C++ - 清泛网 - 专注C/C++及内核技术

...乏定义良好的、用于处理文件系统操作的库,这一直是 C++ 语言存在的一个问题。过去,程序员必须使用本机 API 来解决此问题。通过本文您将了解一个提供安全、可移植且易用的 C++ 接口来促进文件系统操作的库:Boost Filesystem L...
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Python: Tuples/dictionaries as keys, select, sort

Suppose I have quantities of fruits of different colors, e.g., 24 blue bananas, 12 green apples, 0 blue strawberries and so on. I'd like to organize them in a data structure in Python that allows for easy selection and sorting. My idea was to put them into a dictionary with tuples as keys, e.g., ...
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UnboundLocalError on local variable when reassigned after first use

The following code works as expected in both Python 2.5 and 3.0: 12 Answers 12 ...