Mercurial > hg > octave-lyh

annotate scripts/strings/rindex.m @ 17535:c12c688a35ed default tip lyh

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Fix warnings
author LYH <lyh.kernel@gmail.com>
date Fri, 27 Sep 2013 17:43:27 +0800
parents bc924baa2c4e
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
14138
72c96de7a403 maint: update copyright notices for 2012
John W. Eaton <jwe@octave.org>
parents: 13289
diff changeset
1 ## Copyright (C) 1996-2012 Kurt Hornik
2325
b5568c31ee2c [project @ 1996-07-15 22:20:21 by jwe]
jwe
parents: 2314
diff changeset
2 ##
2313
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
3 ## This file is part of Octave.
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
4 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
5 ## Octave is free software; you can redistribute it and/or modify it
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
6 ## under the terms of the GNU General Public License as published by
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6139
diff changeset
7 ## the Free Software Foundation; either version 3 of the License, or (at
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6139
diff changeset
8 ## your option) any later version.
2313
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
9 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
10 ## Octave is distributed in the hope that it will be useful, but
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
11 ## WITHOUT ANY WARRANTY; without even the implied warranty of
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
12 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
13 ## General Public License for more details.
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
14 ##
5ca126254d15 [project @ 1996-07-11 21:25:22 by jwe]
jwe
parents: 2311
diff changeset
15 ## You should have received a copy of the GNU General Public License
7016
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6139
diff changeset
16 ## along with Octave; see the file COPYING. If not, see
93c65f2a5668 [project @ 2007-10-12 06:40:56 by jwe]
jwe
parents: 6139
diff changeset
17 ## <http://www.gnu.org/licenses/>.
2271
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
18
3361
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
19 ## -*- texinfo -*-
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
20 ## @deftypefn {Function File} {} rindex (@var{s}, @var{t})
6139
4da9f63d5237 [project @ 2006-11-03 18:39:06 by jwe]
jwe
parents: 6046
diff changeset
21 ## Return the position of the last occurrence of the character string
4da9f63d5237 [project @ 2006-11-03 18:39:06 by jwe]
jwe
parents: 6046
diff changeset
22 ## @var{t} in the character string @var{s}, or 0 if no occurrence is
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
23 ## found. @var{s} may also be a string array or cell array of strings.
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
24 ##
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
25 ## For example:
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3361
diff changeset
26 ##
3361
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
27 ## @example
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
28 ## @group
3361
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
29 ## rindex ("Teststring", "t")
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
30 ## @result{} 6
9051
1bf0ce0930be Grammar check TexInfo in all .m files
Rik <rdrider0-list@yahoo.com>
parents: 8920
diff changeset
31 ## @end group
3361
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
32 ## @end example
3426
f8dde1807dee [project @ 2000-01-13 08:40:00 by jwe]
jwe
parents: 3361
diff changeset
33 ##
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
34 ## The @code{rindex} function is equivalent to @code{index} with
17289
bc924baa2c4e doc: Add new @qcode macro for code samples which are quoted.
Rik <rik@octave.org>
parents: 14363
diff changeset
35 ## @var{direction} set to @qcode{"last"}.
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
36 ##
6139
4da9f63d5237 [project @ 2006-11-03 18:39:06 by jwe]
jwe
parents: 6046
diff changeset
37 ## @seealso{find, index}
3361
4f40efa995c1 [project @ 1999-11-19 21:19:37 by jwe]
jwe
parents: 2355
diff changeset
38 ## @end deftypefn
2271
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
39
5428
2a16423e4aa0 [project @ 2005-08-23 18:38:27 by jwe]
jwe
parents: 5307
diff changeset
40 ## Author: Kurt Hornik <Kurt.Hornik@wu-wien.ac.at>
2355
c9f70d39255f [project @ 1996-08-20 23:30:54 by jwe]
jwe
parents: 2325
diff changeset
41 ## Adapted-By: jwe
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
42 ## This is patterned after the AWK function of the same name.
2314
949ab8eba8bc [project @ 1996-07-12 03:58:02 by jwe]
jwe
parents: 2313
diff changeset
43
2311
2b5788792cad [project @ 1996-07-11 20:18:38 by jwe]
jwe
parents: 2303
diff changeset
44 function n = rindex (s, t)
2271
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
45
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
46 if (nargin != 2)
6046
34f96dd5441b [project @ 2006-10-10 16:10:25 by jwe]
jwe
parents: 5443
diff changeset
47 print_usage ();
2271
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
48 endif
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
49
6139
4da9f63d5237 [project @ 2006-11-03 18:39:06 by jwe]
jwe
parents: 6046
diff changeset
50 n = index (s, t, "last");
3911
8389e78e67d4 [project @ 2002-04-28 02:15:38 by jwe]
jwe
parents: 3426
diff changeset
51
2271
707b9396ad2c [project @ 1996-05-24 02:22:01 by jwe]
jwe
parents:
diff changeset
52 endfunction
7411
83a8781b529d [project @ 2008-01-22 21:52:25 by jwe]
jwe
parents: 7017
diff changeset
53
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
54
14363
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
55 %!assert (rindex ("foobarbaz", "b"), 7)
f3d52523cde1 Use Octave coding conventions in all m-file %!test blocks
Rik <octave@nomad.inbox5.com>
parents: 14138
diff changeset
56 %!assert (rindex ("foobarbaz", "o"), 3)
7411
83a8781b529d [project @ 2008-01-22 21:52:25 by jwe]
jwe
parents: 7017
diff changeset
57
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
58 %!test
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
59 %! str = char ("Hello", "World", "Goodbye", "World");
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
60 %! assert (rindex (str, "o"), [5; 2; 3; 2]);
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
61 %! str = cellstr (str);
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
62 %! assert (rindex (str, "o"), [5; 2; 3; 2]);
7411
83a8781b529d [project @ 2008-01-22 21:52:25 by jwe]
jwe
parents: 7017
diff changeset
63
13289
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
64 %% Test input validation
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
65 %!error rindex ()
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
66 %!error rindex ("foo")
1a6537dbce7b Expand index,rindex functions to accept char array inputs
Rik <octave@nomad.inbox5.com>
parents: 11523
diff changeset
67 %!error rindex ("foo", "bar", "last")
7411
83a8781b529d [project @ 2008-01-22 21:52:25 by jwe]
jwe
parents: 7017
diff changeset
68