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c++ 代码调用nsis安装包实现静默安装 - 脚本技术 - 清泛IT社区，为创新赋能！
...sp; sei.nShow = SW_SHOWNORMAL;
if (!ShellExecuteEx(&sei)) {
DWORD dwStatus = GetLastError();
if (dwStatus == ERROR_CANC...
Python: try statement in a single line
...safer way (and the prevailing style) is to set all variables to something. If they might not get set, set them to None first (or 0 or '' or something if it is more applicable.)
If you do assign all the names you are interested in first, you do have options.
The best option is an if statement.
...
VS2005中SetUnhandledExceptionFilter函数应用 - C/C++ - 清泛网 - 专注C/C++及内核技术
...r函数，使之无效。在X86平台下，可以使用以下代码。
#ifndef _M_IX86
#error "The following code only works for x86!"
#endif
void DisableSetUnhandledExceptionFilter()
{
void *addr = (void*)GetProcAddress(LoadLibrary(_T("kernel32.dll")),
...
C++ SpinLock 自旋锁的代码实现（全网最简略的方式） - C/C++ - 清泛网 - ...
...short spinCount = 0;
while(f_.test_and_set(memory_order_acquire)) {
if ( (spinCount++) == 0 ) {
#ifdef _WIN32
SwitchToThread();
#else
sched_yield();
#endif
}
}
}
void unlock() { f_.clear(memory_order_release); }
};
3、测试代码如下：
SpinLock lck;
thre...
How can I manually generate a .pyc file from a .py file
...mething about meta files in Python. This compileall also build some cache? If not, what is the command for that?? Since the end-users doesn't have write permission to the lib directory. And I want to speed up things here... PS. also take a look at the -O flag, for bytecode (.pyo file iso .pyc) compi...
Check if an image is loaded (no errors) with jQuery
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The .load() and .error() methods are confusing and now deprecated, use .on() and use the load and error as events.
– Firsh - LetsWP.io
Mar 8 '14 at 20:12
...
Getting the location from an IP address [duplicate]
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I have been using hostip.info for a year now and I'm NOT impressed. It usually return unknown 9/10 checks
– aron
Jun 30 '10 at 14:32
...
Rails Observer Alternatives for 4.0
...
They are in a plugin now.
Can I also recommend an alternative which will give you controllers like:
class PostsController < ApplicationController
def create
@post = Post.new(params[:post])
@post.subscribe(PusherListener.new)
@...
How does Google's Page Speed lossless image compression work?
...e files that can be stripped away if filesize is your primary concern. I know that info is out there on the web, I just wanted to have a nice place to collate it here on SO.
– Drew Noakes
Mar 27 '11 at 19:10
...
Which SQL query is faster? Filter on Join criteria or Where clause?
...same plans)
Logically, you should make the operation that still has sense if you replace INNER JOIN with a LEFT JOIN.
In your very case this will look like this:
SELECT *
FROM TableA a
LEFT JOIN
TableXRef x
ON x.TableAID = a.ID
AND a.ID = 1
LEFT JOIN
TableB b
ON ...