random technical notes

AJAX API Playground – это более 170 примеров использования API восьми сервисов от Google.

команда разработчиков свободного движка блогов WordPress запустила новый ресурс – wordpress.tv, сайт с видеоуроками по WordPress.
На сайте доступны для просмотра видеоуроки по установке и настройке как автономного движка, так и на сервисе WordPress.com. Там же доступны различные презентации/слайдшоу скрытых возможностей WordPress, интервью с блоггерами из разных стран.

Компания GuiMags, выпускает наборы магнитов-контролов, а так же – специальные магнитные доски, позволяющие создавать физические прототипы экранов под различные разрешения (800х600, 1920×1080 и другие).

Во время компиляции отладочная информация складывается в .obj:

CPP_PROJ_RELEASE=/MT /O2 /Z7
CPP_PROJ_DEBUG=/MTd /Od /Z7

При линковке /debug включает генерацию PDB:

CPP_PROJ=$(CPP_PROJ_COMMON) $(CPP_PROJ_RELEASE) $(CPP_ADD_32) /Zp4
LINK32_FLAGS=$(LINK_COMMON) /debug /incremental:no /machine:i386

lpClass [in, optional]
The user-defined class type of this key.
This parameter may be ignored.
This parameter can be NULL.

Этот параметр позволяет при создании ключа задать строку, которая будет храниться с этим ключом, пока тот не будет удалён. После создания ключа, параметр не может быть изменён. Эта строка может быть прочитана с помощью функции RegQueryInfoKey.

The Qt SCXML engine is a state-machine engine using Qt. It’s based on W3C’s SCXML standard. It allows for:

• Bullet-proof business logic
• Decoupling application flow from graphics/data/engine
• Dealing with complex asynchronous systems.

Example uses:

• Implementing system rules. e.g. ‘stop the media-player when an incoming call comes in’
• Eliminating modal dialogs with a well-defined state flow
• “Go Back” functionality for easy menu navigation.

Link

Artistic Style is a source code indenter, formatter, and beautifier for the C, C++, C# and Java programming languages.

When indenting source code, we as programmers have a tendency to use both spaces and tab characters to create the wanted indentation. Moreover, some editors by default insert spaces instead of tabs when pressing the tab key, and other editors (Emacs for example) have the ability to “pretty up” lines by automatically setting up the white space before the code on the line, possibly inserting spaces in a code that up to now used only tabs for indentation.

Since the NUMBER of space characters showed on screen for each tab character in the source code changes between editors (unless the user sets up the number to his liking…), one of the standard problems programmers are facing when moving from one editor to another is that code containing both spaces and tabs that was up to now perfectly indented, suddenly becomes a mess to look at when changing to another editor. Even if you as a programmer take care to ONLY use spaces or tabs, looking at other people’s source code can still be problematic.

To address this problem, Artistic Style was created – a filter written in C++ that automatically re-indents and re-formats C / C++ / C# / Java source files. It can be used from a command line, or it can be incorporated as classes in another C++ program.

Link

// Example 1
// Allocation
T* pv = (T*)malloc( sizeof(T) );
// Construction
::new( pv ) T( /*arg-list*/ );
...
// Destruction
pv->T::~T();
// Deallocation
free( pv );

// Example 2
class Blanks
{
public:
  Blanks(){}
  void* operator new( size_t stAllocateBlock, int chInit )
  {
    void* pvTemp = malloc( stAllocateBlock );
    if( pvTemp != 0 )
    {
      memset( pvTemp, chInit, stAllocateBlock );
    }
    return pvTemp;
  }
};
// For discrete objects of type Blanks, the global operator new function
// is hidden. Therefore, the following code allocates an object of type
// Blanks and initializes it to 0xa5
Blanks *a5 = new(0xa5) Blanks;
bool b = a5 != 0;

std::map<wstring, wstring> map1;
std::map<wstring, wstring> map2(map1);
std::map<wstring, wstring> map3(map2.begin(), map2.end());

map1.insert(map3.begin(), map3.end());
map2 = map3;
std::copy(map2.begin(), map2.end(), inserter(map1, map1.end()));

Structured Storage provides file and data persistence in COM by handling a single file as a structured collection of objects known as storages and streams.

The purpose of Structured Storage is to reduce the performance penalties and overhead associated with storing separate objects in a single file. Structured Storage provides a solution by defining how to handle a single file entity as a structured collection of two types of objects—storages and streams—through a standard implementation called Compound Files. This enables the user to interact with, and manage, a compound file as if it were a single file rather than a nested hierarchy of separate objects.

Read more…