Hello William, Monday, September 30, 2002, 5:36:41 PM, you wrote: WDT> Hi Bulat, WDT> Do you mean just because we need to story only "len" instead of "len" and WDT> "capa" for each array/tuple? I think it is only a saving of 4 bytes per WDT> array. .... but Array_Of_Tuples is better candidate for realization. but in some cases we need Hash of tuples or some more complex structure -- Best regards, Bulat mailto:bulatz / integ.ru