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How to disable GCC warnings for a few lines of code
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Another pattern is to just do a cast of the variable to void. In fact, I have seen in a project the following macro: #define UNUSED(x) ((void)x) used to silence warnings. I think it was in ReactOS?
– Paul Stelian
Apr 1...
What is a method group in C#?
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You can cast a method group into a delegate.
The delegate signature selects 1 method out of the group.
This example picks the ToString() overload which takes a string parameter:
Func<string,string> fn = 123.ToString;
Console...
C++对象布局及多态探索之菱形结构虚继承 - C/C++ - 清泛网 - 专注C/C++及内核技术
...们做个指针的动态转型再调用一次：
C141 * pt1 = dynamic_cast (pt);
pt1-> foo();
第1行代码对应的汇编指令如下：
01 00423FBD cmp dword ptr [ebp+FFFFF73Ch],0
02 00423FC4 je 00423FD7
03 00423FC6 mov eax,dword ptr [ebp+FFFFF73Ch]
04 00423FCC add eax,5
0...
What does the M stand for in C# Decimal literal notation?
... not lose/garble any information. The same is not true of decimal numbers. Casting the double value 0.42 to decimal can give you a different value than 0.42M (and the same for using a double literal in place of a float literal - float val = 423.3 also fails). So you're choosing between a subtly wron...
Office在线预览及PDF在线预览的实现方式大集合 - 更多技术 - 清泛网 - 专注...
...用适合中文排版的纯Html、CSS技术。
2、接口简单，适合PHP、JSP、ASP.net等所有的对接，省心省力。
3、费用低廉，节省投入。
4、不用关心客户端是否安装了Office软件，不用在客户端部署。
5、手机在线预览2页Word文档只有3K大小...
Convert a series of parent-child relationships into a hierarchical tree?
...ay data has been encapsulated into TreeNode.
The full code example:
<?php
namespace My;
$tree = array('H' => 'G', 'F' => 'G', 'G' => 'D', 'E' => 'D', 'A' => 'E', 'B' => 'C', 'C' => 'E', 'D' => null);
// add children to parents
$flat = array(); # temporary array
foreach...
浅谈HTML5 & CSS3的新交互特性 - 更多技术 - 清泛网 - 专注C/C++及内核技术
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2. 更好的表格体系
现在，你可以抛弃JavaScript或者是PHP，只通过HTML5来定义表格。你可以定义每个表格单元的输入格式，也可以定义这个单元是否是必填的等等。
3. 音频、视频API
HTML5不但允许你在网页中直接整合视频、...
MySQL Like multiple values
...GEXP 'sports|pub'
Found this solution here: http://forums.mysql.com/read.php?10,392332,392950#msg-392950
More about REGEXP here: http://www.tutorialspoint.com/mysql/mysql-regexps.htm
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impr...
Best way to store time (hh:mm) in a database
..., while also making conversion to a DATETIME simple.
For example:
SELECT CAST(0.5 AS DATETIME)
--1900-01-01 12:00:00.000
Storing the value as a DECIMAL(9,9) would consume 5 bytes. However, if precision to not of utmost importance, a REAL would consume only 4 bytes. In either case, aggregate calc...
When NOT to use yield (return) [duplicate]
...the collection itself would allow the end user to modify it (with a proper cast), whereas the first method would not.
– Grx70
Jul 19 '15 at 9:04
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