CDWordArray Class

Article
04/28/2015

Supports arrays of 32-bit doublewords.

class CDWordArray : public CObject

Members

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

Name	Description
CObArray::CObArray	Constructs an empty array.

Public Methods

Name	Description
CObArray::Add	Adds an element to the end of the array; grows the array if necessary.
CObArray::Append	Appends another array to the array; grows the array if necessary.
CObArray::Copy	Copies another array to the array; grows the array if necessary.
CObArray::ElementAt	Returns a temporary reference to the byte within the array.
CObArray::FreeExtra	Frees all unused memory above the current upper bound.
CObArray::GetAt	Returns the value at a given index.
CObArray::GetCount	Gets the number of elements in this array.
CObArray::GetData	Allows access to elements in the array. Can be NULL.
CObArray::GetSize	Gets the number of elements in this array.
CObArray::GetUpperBound	Returns the largest valid index.
CObArray::InsertAt	Inserts an element (or all the elements in another array) at a specified index.
CObArray::IsEmpty	Determines if the array is empty.
CObArray::RemoveAll	Removes all the elements from this array.
CObArray::RemoveAt	Removes an element at a specific index.
CObArray::SetAt	Sets the value for a given index; array not allowed to grow.
CObArray::SetAtGrow	Sets the value for a given index; grows the array if necessary.
CObArray::SetSize	Sets the number of elements to be contained in this array.

Public Operators

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

Remarks

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.

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.

Requirements

Header: afxcoll.h

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