add
Adds an association from the given key to the given value
Return
True because the multimap is always modified as the result of this operation
Parameters
key
The key to associate
value
The value to associate
Adds an association from the given key to the given value, inserting it at the given index in the list of values already associated with the key.
Parameters
key
The key to associate
index
The index at which to insert value in the list of associated values
value
The value to associate