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Struct like objects in Java
...ects. Besides, sometimes it's better to return a copy of field's object or transform it somehow etc. You can mock such methods in your tests. If you create a new class you might not see all possible actions. It's like defensive programming - someday getters and setters may be helpful, and it doesn't...
What are some better ways to avoid the do-while(0); hack in C++?
...de to add early return statements.
You throw whenever you cannot continue, transforming all the if(error_ok != ... into straight-forward calls.
Equivalent C++ code:
result_type cpp_code()
{
raii_resource1 r1 = computation1();
raii_resource2 r2 = computation2();
// ...
return compu...
Equals(=) vs. LIKE
...is collation can process multiple bytes at a time and it can apply various transforms (such as case insensitive comparison). The = operator is completely abstracted from the vagaries of the collation.
How Does LIKE Work?
The SQL Standard § 8.5 describes how LIKE compares strings:
The <pred...
boost自定义composite_key_compare比较函数 - C/C++ - 清泛网 - 专注C/C++及内核技术
...site_key_compare比较函数composite_key_compare指定boost多容器元素的比较方法,当然我们也可以自定义比较函数。另外,如果调试过程中遇到很奇怪的问题,可以在自定义比较函数中下断点进行调试。
// boost_demo.cpp : 定义控制台应用程...
PHP报错:Only variables should be passed by reference - C/C++ - 清泛网 - 专注C/C++及内核技术
...l = array_shift(explode(' ', $tag));
解决办法 1 :
5.3以上版本的问题,应该也和配置有关 只要406行把这一句拆成两句就没有问题了
$tag_sel = array_shift(explode(' ', $tag));
改成:
$tag_arr = explode(' ', $tag);
$tag_sel = array_shift($tag_arr);
(...
mfc从CImageList中获取CBitmap位图对象 - C/C++ - 清泛网 - 专注C/C++及内核技术
mfc从CImageList中获取CBitmap位图对象通过图像的索引号从CImageList中获取CBitmap位图对象的函数如下: CImageList中获取CBitmap位图对象void GetListImage(CImageList &Imag...通过位图的索引号从CImageList中获取CBitmap位图对象的函数如下:
//CImageL...
warning C4996 - C/C++ - 清泛网 - 专注C/C++及内核技术
...unsafe. ......
warning C4996: strcpy was declared deprecated
出现这样的警告,是因为VC2005之后的版本中认为CRT中的一组函数如果使用不当,可能会产生诸如内存泄露、缓冲区溢出、非法访问等安全问题。这些函数如:strcpy、strcat等。
对于...
Linux将一个程序变成后台进程转入后台运行 - C/C++ - 清泛网 - 专注C/C++及内核技术
...程转入后台运行问题现象:Linux下写了一个无限循环处理的程序(类似Linux守护进程),不过当我们. xxx运行程序时,由于程序没有退出,终端被阻塞无法继续...问题现象:
Linux下写了一个无限循环处理的程序(类似Linux守护进程...
AfxIsValidAddress 测试内存地址 - C/C++ - 清泛网 - 专注C/C++及内核技术
...ory space.
测试任何内存地址,以确保它是完全包含在程序的内存空间。
BOOL AfxIsValidAddress(
const void* lp,
UINT nBytes,
BOOL bReadWrite = TRUE
);
Parameters
lp
Points to the memory address to be tested.
指向被测试...
error C2804:binary \'operator +\' has too many parameters - C/C++ - 清泛网 - 专注C/C++及内核技术
...操作数,应该重载为普通非成员函数。
注意重载操作符的形参数目(包括成员函数的隐式 this 指针)与操作符的操作数数目相同。对称的操作符,如算术操作符、相等操作符、关系操作符和位操作符,最好定义为普通非成员函...
