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C++中判断文件、目录是否存在的几种方法 - C/C++ - 清泛网 - 专注C/C++及内核技术
...file exists" << endl;
}
FindClose(hFind);
二、_stat()
现在介绍一个轻量级的方法
在windows中可以使用_stat() 函数。
声明：int _stat(const char* path, struct _stat* buffer);
这个函数使用起来非常方便，如下：
struct _stat fileStat;
if ((_stat(dir.c_s...
Use 'import module' or 'from module import'?
...ur use of it. Here are some points to help you decide.
import module
Pros:
Less maintenance of your import statements. Don't need to add any additional imports to start using another item from the module
Cons:
Typing module.foo in your code can be tedious and redundant (tedium can be minimi...
Get last n lines of a file, similar to tail
...ctually accurate, you make the block size 2048 and you'll tail 20 lines almost immediately.
Also, I don't burn a lot of brain calories trying to finesse alignment with physical OS blocks. Using these high-level I/O packages, I doubt you'll see any performance consequence of trying to align on OS b...
How to refer to relative paths of resources when working with a code repository
We are working with a code repository which is deployed to both Windows and Linux - sometimes in different directories. How should one of the modules inside the project refer to one of the non-Python resources in the project (CSV files, etc.)?
...
How do I watch a file for changes?
... This answer is Windows-specific, but it appears that some cross-platform solutions to this problem have been posted here as well.
– Anderson Green
Aug 13 '13 at 22:53
...
C++ 线程安全的单例模式 - C/C++ - 清泛网 - 专注C/C++及内核技术
...模式一、懒汉模式：即第一次调用该类实例的时候才产生一个新的该类实例，并在以后仅返回此实例。需要用锁，来保证其线程安全性：原因：多个线程 一、懒汉模式：即第一次调用该类实例的时候才产生一个新的该类实例，...
How to move a file?
I looked into the Python os interface, but was unable to locate a method to move a file. How would I do the equivalent of $ mv ... in Python?
...
NtMapViewOfSection注入 - C/C++ - 清泛网 - 专注C/C++及内核技术
NtMapViewOfSection注入新的注入方式:利用一个未公开函数NtMapViewOfSection在远程进程地址空间写入代码，并且用一种新的技术在远程进程中执行它，这种技术完全工...新的注入方式:利用一个未公开函数NtMapViewOfSection在远程进程地址空...
STL：accumulate与自定义数据类型 - C/C++ - 清泛网 - 专注C/C++及内核技术
STL：accumulate与自定义数据类型C++ STL中有一个通用的数值类型计算函数— accumulate(),可以用来直接计算数组或者容器中C++内置数据类型，例如：#include <numeric>int...C++ STL中有一个通用的数值类型计算函数— accumulate(),可以用来直接...
Context switches much slower in new linux kernels
We are looking to upgrade the OS on our servers from Ubuntu 10.04 LTS to Ubuntu 12.04 LTS. Unfortunately, it seems that the latency to run a thread that has become runnable has significantly increased from the 2.6 kernel to the 3.2 kernel. In fact the latency numbers we are getting are hard to belie...