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Why are preprocessor macros evil and what are the alternatives?
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Another example is "if else" in macros, say we have this:
#define safe_divide(res, x, y) if (y != 0) res = x/y;
and then
if (something) safe_divide(b, a, x);
else printf("Something is not set...");
It actually becomes completely the wrong thing....
Replacement: real functions.
3) Ma...
Python Image Library fails with message “decoder JPEG not available” - PIL
...esn't work, try one of the below, depending on whether you are on 64bit or 32bit Ubuntu.
For Ubuntu x64:
sudo ln -s /usr/lib/x86_64-linux-gnu/libjpeg.so /usr/lib
sudo ln -s /usr/lib/x86_64-linux-gnu/libfreetype.so /usr/lib
sudo ln -s /usr/lib/x86_64-linux-gnu/libz.so /usr/lib
Or for Ubuntu 32bit...
How would one write object-oriented code in C? [closed]
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32 Answers
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Get URL query string parameters
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edited Jun 10 '19 at 19:32
tbc
10311 silver badge1212 bronze badges
answered Dec 12 '11 at 3:57
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How do I Search/Find and Replace in a standard string?
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answered Feb 4 '13 at 0:32
Czarek TomczakCzarek Tomczak
16.8k55 gold badges4343 silver badges5454 bronze badges
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How to implement a ConfigurationSection with a ConfigurationElementCollection
...ypeof(CustomApplicationConfigSection));
public const string SECTION_NAME = "CustomApplicationConfig";
[ConfigurationProperty("Credentials")]
public CredentialsConfigElement Credentials
{
get
{
return base["Credentials"] as Cred...
Why does !{}[true] evaluate to true in JavaScript?
...PI && inspectedWindow.console) {
inspectedWindow.console._commandLineAPI = new CommandLineAPI(this._commandLineAPIImpl, isEvalOnCallFrame ? object : null);
expression = "with ((window && window.console && window.console._commandLineAPI) || {}) {\n" + expre...
CreateWindow()动态创建一个EditBox - C/C++ - 清泛IT论坛，有思想、有深度
本帖最后由 zqp2013 于 2015-1-4 16:21 编辑
在Win32代码或MFC代码中动态创建一个EditBox：
在OnInitDialog()函数中：
// 创建EditBox
HWND m_wndEdit = CreateWindow(_T("EDIT"), 0, WS_C...
Initializing a static std::map in C++
...namespace std;
using namespace boost::assign;
map<int, char> m = map_list_of (1, 'a') (3, 'b') (5, 'c') (7, 'd');
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Where does gcc look for C and C++ header files?
.../Library/Frameworks (framework directory)
End of search list.
[..]
t.c:1:32: error: bogus.h: No such file or directory
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