CObArray::SetAt
Sets the array element at the specified index.
void SetAt(
INT_PTR nIndex,
CObject* newElement
);
Parameters
nIndex
An integer index that is greater than or equal to 0 and less than or equal to the value returned by GetUpperBound.newElement
The object pointer to be inserted in this array. A NULL value is allowed.
Remarks
SetAt will not cause the array to grow. Use SetAtGrow if you want the array to grow automatically.
You must ensure that your index value represents a valid position in the array. If it is out of bounds, then the Debug version of the library asserts.
The following table shows other member functions that are similar to CObArray::SetAt.
Class |
Member Function |
|---|---|
void SetAt( INT_PTRnIndex, BYTE newElement ); |
|
void SetAt( INT_PTRnIndex, DWORD newElement ); |
|
void SetAt( INT_PTRnIndex, void* newElement ); |
|
void SetAt( INT_PTRnIndex, LPCTSTR newElement ); |
|
void SetAt( INT_PTRnIndex, UINT newElement ); |
|
void SetAt( INT_PTRnIndex, WORD newElement ); |
Example
See CObList::CObList for a listing of the CAge class used in all collection examples.
CObArray arr;
CObject* pa;
arr.Add(new CAge(21)); // Element 0
arr.Add(new CAge(40)); // Element 1
if ((pa = arr.GetAt(0)) != NULL)
{
arr.SetAt(0, new CAge(30)); // Replace element 0.
delete pa; // Delete the original element at 0.
}
#ifdef _DEBUG
afxDump.SetDepth(1);
afxDump << _T("SetAt example: ") << &arr << _T("\n");
#endif
The results from this program are as follows:
SetAt example: A CObArray with 2 elements
[0] = a CAge at $47E0 30
[1] = a CAge at $47A0 40
Requirements
Header: afxcoll.h