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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 | 04bc9d2f42c7 |
children | 308d34e9f07d |
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/* Lwlib site configuration template file. -*- C -*- Copyright (C) 1997 Sun Microsystems, Inc. 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. */ /* Not in FSF. */ #ifndef _LWLIB_CONFIG_H_ #define _LWLIB_CONFIG_H_ #include "../src/config.h" #include "../src/compiler.h" #undef NEED_MOTIF #undef NEED_ATHENA #undef NEED_LUCID /* The exact path to the Athena header files depends on which `flavor' of Athena is being used - hence configure defines them for us. */ #undef ATHENA_Scrollbar_h_ #undef ATHENA_Dialog_h_ #undef ATHENA_Form_h_ #undef ATHENA_Command_h_ #undef ATHENA_Label_h_ #undef ATHENA_LabelP_h_ #undef ATHENA_Toggle_h_ #undef ATHENA_ToggleP_h_ #undef ATHENA_AsciiText_h_ #undef ATHENA_XawInit_h_ #endif /* _LWLIB_CONFIG_H_ */