<INTERFACE> The <CD/ArrayQSortFn/ functor <SEEALSO> <PP> The functor <FCTREF NOLINK/ArrayQSortFn/ implements functions for the in-place sorting of monomorphic arrays. The algorithm used is based on the a tuned version of quicksort due to J. Bentley and D. McIlroy described in ``Engineering a Sort Function,'' <EM/Software-Practice and Experience/, 23(11), 1993, pp. 1249-1265. <PP> The functor argument should be thinned to the minimum needed by the algorithm, which requires only an array type, plus the functions <CD/sub/, <CD/length/ and <CD/update/. <PP> Not that the sorting algorithm is not stable. <ID/A/MONO_ARRAY <ID/MONO_ARRAY_SORT/ </INTERFACE>