CRBMultiMap::CRBMultiMap
The constructor.
explicit CRBMultiMap(
size_t nBlockSize = 10
) throw( );
Parameters
- nBlockSize
The block size.
Remarks
The nBlockSize parameter is a measure of the amount of memory allocated when a new element is required. Larger block sizes reduce calls to memory allocation routines, but use more resources. The default will allocate space for 10 elements at a time.
See the documentation for the base class CRBTree for information on the other methods available.
Example
// Define a multimap object which has an integer
// key, a double value, and a block size of 5
CRBMultiMap<int, double> myMap(5);
// Add some key/values. Notice how three
// different values are associated with
// one key. In a CRBMap object, the values
// would simply overwrite each other.
myMap.Insert(0, 1.1);
myMap.Insert(0, 1.2);
myMap.Insert(0, 1.3);
myMap.Insert(1, 2.1);
// Look up a key and iterate through
// all associated values
double v;
POSITION myPos = myMap.FindFirstWithKey(0);
while (myPos != NULL)
{
v = myMap.GetNextValueWithKey(myPos,0);
// As the loop iterates, v
// contains the values 1.3, 1.2, 1.1
}
// Remove all of the values associated with that key
size_t i = myMap.RemoveKey(0);
// Confirm all three values were deleted
ATLASSERT(i == 3);
Requirements
Header: atlcoll.h