*  another C++ class tidbit:

this - a keyword that, within a method,
       is a pointer to the calling object

*   you'll see this in string_list in the
    overloaded assignment operator

STL - standard template library
*   a collection of C++ container classes

*   walked through the implementation of dynamic-array-based
    class string_list in string_list.cpp

    *   ...this class is tested in string_list_test.cpp

*   talked about the linked-list-implementation of
    the same kind of list of strings, in
    string_list2.h and string_list2.cpp, tested in
    string_list2_test.cpp

    *   string_list2 uses a class string_node, a little
        class with two data fields: 
        *   a value field containing a string, and 
        *   a next field containing a pointer to
	    the next string_node in a linked list;

        *   the last node has a next field whose value
	    is NULL (to indicate it isn't pointing
	    to a next node...)	

    *   note that string_list and string_list2 look
        THE SAME to the *user* -- the same methods --
	only the name (string_list, string_list2)
	differs;

        *   one demonstration of this: string_list_test.cpp
	    and string_list2_test.cpp differ only
	    in the name of the class!

    *   and another -- string_list.h and string_list2.h
        differ only in their private data fields!

    *   how those methods are implemented in string_list.cpp
        and string_list2.cpp are quite different, of
	course -- one using an underlying dynamically-allocated
	array, and the other using a pointer to the first
	of a linked "chain" of string_nodes;