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linux 下巧妙使用squid代理服务器 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...要同时访问外网但公有IP地址不足的问题。同时可以作为一个防火墙，隔离内网与外网，并且能提供监控网络和记录传输信息的功能，加强局域网的安全性等。它的主要作用有以下几点。
1．共享网络
2．加快访问速度，节约...
做了个"外卖菜单选择器"App，才发现ListView和Spinner的区别这么...
... 操作步骤越少越好，中老年顾客也得会用
这本质就是一个列表展示+选择的需求。App Inventor 2里能做这件事的组件，主要有两个：ListView（列表显示框）和Spinner（下拉框）。还有个ListPicker（列表选择器）也算近亲，但交互方式...
What is Linux’s native GUI API?
Both Windows (Win32 API) and OS X (Cocoa) have their own APIs to handle windows, events and other OS stuff. I have never really got a clear answer as to what Linux’s equivalent is?
...
Using Python's os.path, how do I go up one directory?
...
os.path.abspath(os.path.join(os.path.dirname( __file__ ), '..', 'templates'))
As far as where the templates folder should go, I don't know since Django 1.4 just came out and I haven't looked at it yet. You should probably a...
Programmatically find the number of cores on a machine
...);
int numCPU = sysinfo.dwNumberOfProcessors;
Linux, Solaris, AIX and Mac OS X >=10.4 (i.e. Tiger onwards)
int numCPU = sysconf(_SC_NPROCESSORS_ONLN);
FreeBSD, MacOS X, NetBSD, OpenBSD, etc.
int mib[4];
int numCPU;
std::size_t len = sizeof(numCPU);
/* set the mib for hw.ncpu */
mib[0] = CTL...
提升速度：XP注册表与驱动优化 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...lete三个键，然后点击“Processes(进程)”选项卡，可以看到一个对话框，在这里可以看到目前正在运行的所有进程。如果要为一个程序分配更多的进程时间，如3D Studio Max，只需右键点击这个进程，再把鼠标指针向下移动到“Set Prio...
How to measure time in milliseconds using ANSI C?
...NSI C function that provides better than 1 second time resolution but the POSIX function gettimeofday provides microsecond resolution. The clock function only measures the amount of time that a process has spent executing and is not accurate on many systems.
You can use this function like this:
s...
Random strings in Python
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@BlairConrad: I'd say the question was too broad e.g., os.urandom(length) answers the original question and @sth had read OP's mind incorrectly.
– jfs
Jun 8 '16 at 11:19
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When I catch an exception, how do I get the type, file, and line number?
...
import sys, os
try:
raise NotImplementedError("No error")
except Exception as e:
exc_type, exc_obj, exc_tb = sys.exc_info()
fname = os.path.split(exc_tb.tb_frame.f_code.co_filename)[1]
print(exc_type, fname, exc_tb.tb_li...
How to get the parent dir location
...can only go as far as the root package, however. If this is a problem, use os.path.abspath: dirname(dirname(abspath(file))).
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