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add functions `stable-union' and `stable-intersection' to do stable set operations -------------------- ChangeLog entries follow: -------------------- lisp/ChangeLog addition: 2010-02-22 Ben Wing <ben@xemacs.org> * cl-seq.el: * cl-seq.el (stable-union): New. * cl-seq.el (stable-intersection): New. New functions to do stable set operations, i.e. preserve the order of the elements in the argument lists, and prefer LIST1 over LIST2 when ordering the combined result. The result looks as much like LIST1 as possible, followed (in the case of `stable-union') by any necessary elements from LIST2, in order. This is contrary to `union' and `intersection', which are not required to be order- preserving and are not -- they prefer LIST2 and output results in backwards order.
author Ben Wing <ben@xemacs.org>
date Mon, 22 Feb 2010 21:23:02 -0600
parents 189fb67ca31a
children 0f66906b6e37
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;; Copyright (C) 1998 Free Software Foundation, Inc.

;; Author: Martin Buchholz <martin@xemacs.org>
;; Maintainer: Martin Buchholz <martin@xemacs.org>
;; Created: 1998
;; Keywords: tests, database

;; This file is part of XEmacs.

;; XEmacs is free software; you can redistribute it and/or modify it
;; under the terms of the GNU General Public License as published by
;; the Free Software Foundation; either version 2, or (at your option)
;; any later version.

;; XEmacs is distributed in the hope that it will be useful, but
;; WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
;; General Public License for more details.

;; You should have received a copy of the GNU General Public License
;; along with XEmacs; see the file COPYING.  If not, write to the Free
;; Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
;; 02111-1307, USA.

;;; Synched up with: Not in FSF.

;;; Commentary:

;;; Test database functionality
;;; See test-harness.el

(condition-case nil
    (require 'test-harness)
  (file-error
   (when (and (boundp 'load-file-name) (stringp load-file-name))
     (push (file-name-directory load-file-name) load-path)
     (require 'test-harness))))

(flet ((delete-database-files (filename)
	(dolist (fn (list filename
			  (concat filename ".db")
			  (concat filename ".pag")
			  (concat filename ".dir")))
	  (ignore-file-errors (delete-file fn))))

       (test-database (db)
	(Assert (databasep db))
	(put-database "key1" "val1" db)
	(Assert-equal "val1" (get-database "key1" db))
	(remove-database "key1" db)
	(Assert-equal nil (get-database "key1" db))
	(close-database db)
	(Assert (not (database-live-p db)))
	(Assert (databasep db))))

  (let ((filename (expand-file-name "test-harness" (temp-directory))))

    (dolist (db-type '(dbm berkeley-db))
      (when (featurep db-type)
	(princ "\n")
	(delete-database-files filename)
	(test-database (open-database filename db-type))
	(delete-database-files filename)))))