Data::StackedMap

Data::StackedMap is a Perl object that stores key/value pairs in a stacked fashion. This class implements a simple key/value map where each key can exist multiple times in different layers in a stack.

It is easy to use, thanks to its simple syntax. After creating a new object, users can easily store and retrieve key/value pairs using the set() and get() methods.

For example, the following code sets the value of "foo" to 10 and retrieves it:
$data->set("foo" => 10);
print $data->get("foo"); # prints '10'

Users can also push new layers onto the stack, allowing them to modify values without affecting previous layers. For instance, the following code sets a new layer and modifies the value of "foo":
$data->push();
$data->set("foo" => 20);
print $data->get("foo"); # now prints '20'

Finally, users can pop layers off the stack to return to previous versions of the data. For example:
$data->pop();
print $data->get("foo"); # prints '10' again

Overall, Data::StackedMap is a useful tool for managing complex data structures in Perl. Its stack-based approach allows for easy modification and retrieval of values across multiple layers.