1 (* Copyright (C) 2000, HELM Team.
3 * This file is part of HELM, an Hypertextual, Electronic
4 * Library of Mathematics, developed at the Computer Science
5 * Department, University of Bologna, Italy.
7 * HELM is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU General Public License
9 * as published by the Free Software Foundation; either version 2
10 * of the License, or (at your option) any later version.
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13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
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18 * along with HELM; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place - Suite 330, Boston,
22 * For details, see the HELM World-Wide-Web page,
23 * http://www.cs.unibo.it/helm/.
27 * implementazione del comando SORTEDBY
35 * implementazione del comando SORTEDBY
37 let sortedby_ex alist order afunc =
38 let before = Sys.time () in
40 let module S = Mathql_semantics in
42 (fun {S.extra = e1} {S.extra = e2} ->
48 (fun {S.uri = u ; S.attributes = attr} -> {S.uri = u ; S.attributes = attr ; S.extra = (apply_func afunc u)})
53 let after = Sys.time ()
54 and ll1 = string_of_int (List.length alist) in
55 let diff = string_of_float (after -. before) in
57 ("SORTEDBY(" ^ ll1 ^ ") = " ^ string_of_int (List.length res) ^