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

See Also

Reference

CRBMultiMap Class

CRBMultiMap::~CRBMultiMap

Other Resources

CRBMultiMap Members