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总结const_cast、static_cast、dynamic_cast、reinterpret_cast - C/C++ - ...
...至它即便不是一个CDerived你也可以这样做。
当然，这个问题只在如果你做了多继承时发生。在你将CDerived转换 到 CBaseX时static_cast<> 和 reinterpret_cast<>是没有区别的。
情况3：void*之间的向前和向后转换
因为任何指针可以被转...
Favorite (G)Vim plugins/scripts? [closed]
... Link to all his vim contributions: vim.org/account/profile.php?user_id=9012
– Benjamin Oakes
May 27 '10 at 0:11
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How to return value from an asynchronous callback function? [duplicate]
...lear, this won't let you "return" the value of that variable in a way that PHP returns it. We're basically passing result of one callback function to another call back function. There's still no outside var that actually holds the result...
– Robert Sinclair
Ju...
What is the difference between an Azure Web Site and an Azure Web Role
...mmand-line tools to set up a web site with popular languages such as .NET, PHP, Node.js, and Python. Supported frameworks are already deployed and do not require more installation steps. The Azure Web Sites gallery contains many third-party applications, such as Drupal and WordPress as well as devel...
MySQL “WITH” clause
... a feature request for MySQL since January 2006: http://bugs.mysql.com/bug.php?id=16244
Other RDBMS products that support common table expressions:
Oracle 9i release 2 and later:
http://www.oracle-base.com/articles/misc/with-clause.php
Microsoft SQL Server 2005 and later:
http://msdn.microsoft.com/...
“where 1=1” statement [duplicate]
... condition is generated dynamically.
for example lets see this code
<?php
//not that this is just example
//do not use it like that in real environment because it security issue.
$cond = $_REQUEST['cond'];
if ($cond == "age"){
$wherecond = " age > 18";
}
$query = "select * from som...
Can I store images in MySQL [duplicate]
...ation. I want it that for each image, there should be a thumb created with PHP (which is not that difficult). I want to save the thumbs (since they are very small) in the database and I use MySQL. (I don't want to save the thumbs as physical files on the drive.)
Does MySQL allow saving and retriev...
菜单的背景颜色 - C/C++ - 清泛网 - 专注C/C++及内核技术
...运行效果如下图：
（PS：不知道大家有没有碰到过这个问题,MENUINFO结构未定义，解决的方法是进入文件选项卡（FileView),在Source File文件下的StdAfx.cpp文件里的最前面部分添加这个语句：#define WINVER 0x0501）
设计弹出式菜单
CMen...
Can a CSS class inherit one or more other classes?
...et an already made, huge web software (in example, an e-commerce or a blog PHP famous software) and they employ PHP code that natively won't add multiple classes to the HTML elements they outuput. This forces you to go around and mess with source code (losing changes if you upgrade later) to make it...
How do I get a substring of a string in Python?
...
Substr() normally (i.e. PHP and Perl) works this way:
s = Substr(s, beginning, LENGTH)
So the parameters are beginning and LENGTH.
But Python's behaviour is different; it expects beginning and one after END (!). This is difficult to spot by beg...