Enumerate about the carrier set members

Ruby is written in C, so carrier set members (which is, individual symbols) are implemented as fixed-size arrays of characters (which is how C represents strings) inside Symbol class. Empty symbol is an array of length 0, symbols of length one are arrays with a single element, symbols of length two are arrays with two elements, and so forth. Symbol class operations are either written to use these arrays directly, or to generate a String instance, do operation on string, and convert the result back into a Symbol instance.