XML::DOM::NamedNodeMap - A hash table interface for XML::DOM
Objects implementing the NamedNodeMap interface are used to represent collections of nodes that can be accessed by name. Note that NamedNodeMap does not inherit from NodeList; NamedNodeMaps are not maintained in any particular order. Objects contained in an object implementing NamedNodeMap may also be accessed by an ordinal index, but this is simply to allow convenient enumeration of the contents of a NamedNodeMap, and does not imply that the DOM specifies an order to these Nodes.
Note that in this implementation, the objects added to a NamedNodeMap are kept in order.
Return Value: A Node (of any type) with the specified name, or undef if the specified name did not identify any node in the map.
As the nodeName attribute is used to derive the name which the node must be stored under, multiple nodes of certain types (those that have a "special" string value) cannot be stored as the names would clash. This is seen as preferable to allowing nodes to be aliased.
Parameters: arg A node to store in a named node map.
The node will later be accessible using the value of the nodeName attribute of the node. If a node with that name is already present in the map, it is replaced by the new one.
Return Value: If the new Node replaces an existing node with the same name the previously existing Node is returned, otherwise undef is returned.
Return Value: The node removed from the map or undef if no node with such a name exists.
Return Value: The node at the indexth position in the NamedNodeMap, or undef if that is not a valid index.
When this method is called in a list context, it returns a regular perl list containing the values. Note that this list is not "live". E.g.
@list = $map->getValues; # returns a perl list $nodelist = $map->getValues; # returns a NodeList (object ref.) for my $val ($map->getValues) # iterate over the values