大约有 1,550 项符合查询结果（耗时：0.0262秒） [XML]
When does invoking a member function on a null instance result in undefined behavior?
...ber that succeeding falls within the universe of "undefined"!
Microsoft's MFC function GetSafeHwnd actually relies on this behavior. I don't know what they were smoking.
If you're calling a virtual function, the pointer must be dereferenced to get to the vtable, and for sure you're going to get UB...
Why Qt is misusing model/view terminology?
...at they call "View". Over the years I have worked with these frameworks:
MFC
Qt
Swing
SWT
WPF with MVVM
If you compare how the terms "Model" and "View" are used in these frameworks, and what responsibilities the classes in the "View", the "Model", and the "Controller" (if there is one) have, you...
boost多索引容器multi_index_container实战 - C/C++ - 清泛网 - 专注C/C++及内核技术
...重载，先说说两个参数的用例吧，还是用上面的代码作为示例，我们修改一下找到以后的代码
// 修改部分带索引的资料
Student stuTemp = *it;
stuTemp.stu_age = 20;
stuTemp.stu_num = 1; // 改了这个后会导致replace失败
/...
Framework vs. Toolkit vs. Library [duplicate]
...r towards a specific output; an application for a specific OS for example (MFC for MS Windows for example), or for more general purpose work (Spring framework for example).
SDK: "Software Development Kit"
An SDK is a collection of tools to assist the programmer to create and deploy code/content wh...
分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...节，我在这里就不再多说了。对于Paxos算法中的一些异常示例，大家可以自己推导一下。你会发现基本上来说只要保证有半数以上的结点存活，就没有什么问题。
多说一下，自从Lamport在1998年发表Paxos算法后，对Paxos的各种改进...
Multiple INSERT statements vs. single INSERT with multiple VALUES
...ation trying to convert a table with several 100k rows with a C++ program (MFC/ODBC).
Since this operation took a very long time, I figured bundling multiple inserts into one (up to 1000 due to MSSQL limitations). My guess that a lot of single insert statements would create an overhead similar to w...
How to generate a random number in C++?
...
@ChristofferHjärtström: It's for random number generator.
– Cornstalks
Oct 3 '18 at 5:21
...
正则表达式 30 分钟入门教程 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...的文本。例如，\1代表分组1匹配的文本。难以理解？请看示例：
\b(\w+)\b\s+\1\b可以用来匹配重复的单词，像go go, 或者kitty kitty。这个表达式首先是一个单词，也就是单词开始处和结束处之间的多于一个的字母或数字(\b(\w+)\b)，这...
Best practice multi language website
..."Добро пожаловать!",
"Dutch"=>"Welkom!",
"Swedish"=>"Välkommen!",
"Basque"=>"Ongietorri!",
"Spanish"=>"Bienvenito!"
"Welsh"=>"Croeso!");
Now, if your website uses a cookie, you have this for example:
$_COOKIE['language'];
To make it easy let's transform it in a co...
Schema for a multilanguage database
...PROD_Id, PROD_i18n_Cust_Lang_Id, PROD_i18n_Cust_Text) VALUES (1, 2, N'Orangäsaft'); -- Swiss German, if you wonder
And then query the data:
DECLARE @__in_lang_id int
SET @__in_lang_id = (
SELECT Lang_ID
FROM T_Languages
WHERE Lang_ISO_TwoLetterName = 'DE'
)
SELECT
PROD_Id
...