Mercurial > octave-libtiff
view scripts/strings/erase.m @ 30564:796f54d4ddbf stable
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2021.
In all .txi and .texi files except gpl.txi and gpl.texi in the
doc/liboctave and doc/interpreter directories, change the copyright
to "Octave Project Developers", the same as used for other source
files. Update copyright notices for 2022 (not done since 2019). For
gpl.txi and gpl.texi, change the copyright notice to be "Free Software
Foundation, Inc." and leave the date at 2007 only because this file
only contains the text of the GPL, not anything created by the Octave
Project Developers.
Add Paul Thomas to contributors.in.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 28 Dec 2021 18:22:40 -0500 |
parents | 7854d5752dd2 |
children |
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######################################################################## ## ## Copyright (C) 2017-2022 The Octave Project Developers ## ## See the file COPYRIGHT.md in the top-level directory of this ## distribution or <https://octave.org/copyright/>. ## ## This file is part of Octave. ## ## Octave 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 3 of the License, or ## (at your option) any later version. ## ## Octave 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 Octave; see the file COPYING. If not, see ## <https://www.gnu.org/licenses/>. ## ######################################################################## ## -*- texinfo -*- ## @deftypefn {} {@var{newstr} =} erase (@var{str}, @var{ptn}) ## Delete all occurrences of @var{ptn} within @var{str}. ## ## @var{str} and @var{ptn} can be ordinary strings, cell array of strings, or ## character arrays. ## ## Examples ## ## @example ## @group ## ## string, single pattern ## erase ("Hello World!", " World") ## @result{} "Hello!" ## ## ## cellstr, single pattern ## erase (@{"Hello", "World!"@}, "World") ## @result{} @{"Hello", "!"@} ## ## ## string, multiple patterns ## erase ("The Octave interpreter is fabulous", ... ## @{"interpreter ", "The "@}) ## @result{} "Octave is fabulous" ## ## ## cellstr, multiple patterns ## erase (@{"The ", "Octave interpreter ", "is fabulous"@}, ... ## @{"interpreter ", "The "@}) ## @result{} @{"", "Octave ", "is fabulous"@} ## @end group ## @end example ## ## Programming Note: @code{erase} deletes the first instance of a pattern in a ## string when there are overlapping occurrences. For example: ## ## @example ## @group ## erase ("abababa", "aba") ## @result{} "b" ## @end group ## @end example ## ## For processing overlaps, @pxref{XREFstrrep,,@code{strrep}}. ## ## @seealso{strrep, regexprep} ## @end deftypefn function newstr = erase (str, ptn) if (nargin != 2) print_usage (); endif ischarmatrix = false; if (ischar (str)) if (rows (str) > 1) ## Convert to cell. Can't use cellstr which trims spaces. str = mat2cell (str, ones (1, rows (str))); ischarmatrix = true; endif elseif (! iscellstr (str)) error ("erase: STR must be a string or cell array of strings"); endif if (ischar (ptn)) if (rows (ptn) > 1) warning ("Octave:erase:chararray", "erase: using character array for PTN is not recommended, consider cell array of strings instead"); ## Convert to cell. Can't use cellstr which trims spaces. ptn = mat2cell (ptn, ones (1, rows (ptn))); endif elseif (! iscellstr (ptn)) error ("erase: PTN must be a string or cell array of strings"); endif nptn = ifelse (ischar (ptn), 1, numel (ptn)); if (nptn == 1) newstr = strrep (str, ptn, "", "overlaps", false); else ptn = regexptranslate ("escape", ptn(:).'); ptn = strjoin (ptn, '|'); newstr = regexprep (str, ptn, ""); endif if (ischarmatrix) newstr = char (newstr); endif endfunction %!assert (erase ("Hello World!", " World"), "Hello!") %!assert (erase ({"Hello World!"}, " World"), {"Hello!"}) %!assert (erase (char ("Hello", "World!"), "World"), char ("Hello ", "!")) %!assert (erase ({"Hello", "World!"}, "World"), {"Hello", "!"}) %!assert (erase ("Hello World!", {"o"; "World"; " "}), "Hell!") ## Test overlaps ## from https://savannah.gnu.org/bugs/?52647#comment5 %!assert (erase ('ababa', 'aba'), 'ba') %!assert (erase ('abababa', 'aba'), 'b') %!assert (erase ('ababababa', 'aba'), 'bba') %!assert (erase ('ababababa', {'aba', 'bba'}), 'bba') %!assert (erase ('ababababa ', {'aba', 'bba'}), 'bba ') %!assert (erase ({' ababababa '}, {'aba', 'bba'}), {' bba '}) %!assert (erase (' ababa ', {'aba', 'baba'}), ' ba ') %!assert (erase (' Hello World t ', {'t';'llo'}), ' He World ') %!assert (erase ({' Hello World t '}, [ 'o ']), {' HellWorld t '}) %!assert (erase ( 'Hello World t ', {'ld '; 'o '}), 'HellWort ') %!assert (erase ('aba', 'aba'), '') %!assert (erase ({'aba'}, 'aba'), ({""})) %!assert (erase ('', 'aba'), '') %!assert (erase ({'abbabbabba'},{'abba'}), {'bb'}) %!assert (erase ({'ababababa';'abbabbabba'}, 'aba'), {'bba';'abbabbabba'}) %!assert (erase ({''}, {''}), {''}) %!assert (erase ({'pppppppp'}, 'p'), {''}) %!assert (erase ('Hello World t ', {'ld '; 'o '}), 'HellWort ') %!assert (erase ({'Hello World t '}, {'ld '; 'o '}), {'HellWort '}) ## Test input validation %!error <Invalid call> erase () %!error erase ("a") %!error erase ("a", "b", "c") %!error <STR must be a string> erase ([1], "foo") %!error <PTN must be a string> erase ("foo", [1]) %!warning <using character array for PTN is not recommended> %! erase ("a", ["a";"b"]);