CDWordArray Class

 

The new home for Visual Studio documentation is Visual Studio 2017 Documentation on docs.microsoft.com.

The latest version of this topic can be found at CDWordArray Class.

Supports arrays of 32-bit doublewords.

class CDWordArray : public CObject  

The member functions of CDWordArray are similar to the member functions of class CObArray. Because of this similarity, you can use the CObArray reference documentation for member function specifics. Wherever you see a CObject pointer as a function parameter or return value, substitute a DWORD.

CObject* CObArray::GetAt( int <nIndex> ) const;

for example, translates to

DWORD CDWordArray::GetAt( int <nIndex> ) const;

Public Constructors

NameDescription
CObArray::CObArrayConstructs an empty array.

Public Methods

NameDescription
CObArray::AddAdds an element to the end of the array; grows the array if necessary.
CObArray::AppendAppends another array to the array; grows the array if necessary.
CObArray::CopyCopies another array to the array; grows the array if necessary.
CObArray::ElementAtReturns a temporary reference to the byte within the array.
CObArray::FreeExtraFrees all unused memory above the current upper bound.
CObArray::GetAtReturns the value at a given index.
CObArray::GetCountGets the number of elements in this array.
CObArray::GetDataAllows access to elements in the array. Can be NULL.
CObArray::GetSizeGets the number of elements in this array.
CObArray::GetUpperBoundReturns the largest valid index.
CObArray::InsertAtInserts an element (or all the elements in another array) at a specified index.
CObArray::IsEmptyDetermines if the array is empty.
CObArray::RemoveAllRemoves all the elements from this array.
CObArray::RemoveAtRemoves an element at a specific index.
CObArray::SetAtSets the value for a given index; array not allowed to grow.
CObArray::SetAtGrowSets the value for a given index; grows the array if necessary.
CObArray::SetSizeSets the number of elements to be contained in this array.

Public Operators

NameDescription
CObArray::operator [ ]Sets or gets the element at the specified index.

CDWordArray incorporates the IMPLEMENT_SERIAL macro to support serialization and dumping of its elements. If an array of doublewords is stored to an archive, either with the overloaded insertion ( <<) operator or with the Serialize member function, each element is, in turn, serialized.

System_CAPS_ICON_note.jpg Note

Before using an array, use SetSize to establish its size and allocate memory for it. If you do not use SetSize, adding elements to your array causes it to be frequently reallocated and copied. Frequent reallocation and copying are inefficient and can fragment memory.

If you need debug output from individual elements in the array, you must set the depth of the CDumpContext object to 1 or greater.

For more information on using CDWordArray, see the article Collections.

Header: afxcoll.h

CObject Class
Hierarchy Chart
CObArray Class

Show: