Mercurial > octave
view scripts/strings/startsWith.m @ 31130:0c637fa9529a
build: Search for python executable with multiple names (bug #62372)
* m4/acinclude.m4 (OCTAVE_PROG_PYTHON): Switch to AC_CHECK_PROGS and search for
a range of possible names for python executable.
author | Rik <rik@octave.org> |
---|---|
date | Sat, 09 Jul 2022 09:58:02 -0700 |
parents | 796f54d4ddbf |
children | 597f3ee61a48 |
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######################################################################## ## ## Copyright (C) 2020-2022 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{retval} =} startsWith (@var{str}, @var{pattern}) ## @deftypefnx {} {@var{retval} =} startsWith (@var{str}, @var{pattern}, "IgnoreCase", @var{ignore_case}) ## Check whether string(s) start with pattern(s). ## ## Return an array of logical values that indicates which string(s) in the ## input @var{str} (a single string or cell array of strings) begin with ## the input @var{pattern} (a single string or cell array of strings). ## ## If the value of the parameter @qcode{"IgnoreCase"} is true, then the ## function will ignore the letter case of @var{str} and @var{pattern}. By ## default, the comparison is case sensitive. ## ## Examples: ## ## @example ## @group ## ## one string and one pattern while considering case ## startsWith ("hello", "he") ## @result{} 1 ## @end group ## ## @group ## ## one string and one pattern while ignoring case ## startsWith ("hello", "HE", "IgnoreCase", true) ## @result{} 1 ## @end group ## ## @group ## ## multiple strings and multiple patterns while considering case ## startsWith (@{"lab work.pptx", "data.txt", "foundations.ppt"@}, ## @{"lab", "data"@}) ## @result{} 1 1 0 ## @end group ## ## @group ## ## multiple strings and one pattern while considering case ## startsWith (@{"DATASHEET.ods", "data.txt", "foundations.ppt"@}, ## "data", "IgnoreCase", false) ## @result{} 0 1 0 ## @end group ## ## @group ## ## multiple strings and one pattern while ignoring case ## startsWith (@{"DATASHEET.ods", "data.txt", "foundations.ppt"@}, ## "data", "IgnoreCase", true) ## @result{} 1 1 0 ## @end group ## @end example ## ## @seealso{endsWith, regexp, strncmp, strncmpi} ## @end deftypefn function retval = startsWith (str, pattern, IgnoreCase, ignore_case) if (nargin != 2 && nargin != 4) print_usage (); endif ## Validate input str and pattern if (! (iscellstr (str) || ischar (str))) error ("startsWith: STR must be a string or cell array of strings"); endif if (! (iscellstr (pattern) || ischar (pattern))) error ("startsWith: PATTERN must be a string or cell array of strings"); endif str = cellstr (str); pattern = cellstr (pattern); if (nargin == 2) ignore_case = false; else ## For Matlab compatibility accept any abbreviation of 3rd argument if (! ischar (IgnoreCase) || isempty (IgnoreCase) || ! strncmpi (IgnoreCase, "IgnoreCase", length (IgnoreCase))) error ('startsWith: third input must be "IgnoreCase"'); endif if (! isscalar (ignore_case) || ! isreal (ignore_case)) error ('startsWith: "IgnoreCase" value must be a logical scalar'); endif ignore_case = logical (ignore_case); endif retval = false (size (str)); if (ignore_case) for j = 1:numel (pattern) retval |= strncmpi (str, pattern{j}, length (pattern{j})); endfor else for j = 1:numel (pattern) retval |= strncmp (str, pattern{j}, length (pattern{j})); endfor endif endfunction ## Test simple use with one string and one pattern %!assert (startsWith ("hello", "he")) %!assert (! startsWith ("hello", "HE")) %!assert (startsWith ("hello", "HE", "i", 5)) %!assert (! startsWith ("hello", "no")) ## Test multiple strings with a single pattern %!test %! str = {"data science", "dataSheet.ods", "myFunc.m"; "foundations.ppt", ... %! "results.txt", "myFile.odt"}; %! pattern = "data"; %! expected = [true, true, false; false, false, false]; %! assert (startsWith (str, pattern), expected); ## Test multiple strings with multiple patterns %!test %! str = {"lab work.pptx", "myFile.odt", "data.txt", "foundations.ppt"}; %! pattern = {"lab", "data"}; %! expected = [true, false, true, false]; %! assert (startsWith (str, pattern), expected); ## Test IgnoreCase %!test %! str = {"DATASHEET.ods", "myFile.odt", "data.txt", "foundations.ppt"}; %! pattern = "data"; %! expected_ignore = [true, false, true, false]; %! expected_wo_ignore = [false, false, true, false]; %! assert (startsWith (str, pattern, "IgnoreCase", true), expected_ignore); %! assert (startsWith (str, pattern, "IgnoreCase", false), expected_wo_ignore); %! assert (startsWith (str, pattern, "I", 500), expected_ignore); %! assert (startsWith (str, pattern, "iG", 0), expected_wo_ignore); ## Test input validation %!error <Invalid call> startsWith () %!error startsWith ("A") %!error startsWith ("A", "B", "C") %!error startsWith ("A", "B", "C", "D", "E") %!error <STR must be a string> startsWith (152, "hi") %!error <STR must be a .* cell array of strings> startsWith ({152}, "hi") %!error <PATTERN must be a string> startsWith ("hi", 152) %!error <PATTERN must be a .* cell array of strings> startsWith ("hi", {152}) %!error <third input must be "IgnoreCase"> startsWith ("hello", "he", 1, 1) %!error <third input must be "IgnoreCase"> startsWith ("hello", "he", "", 1) %!error <third input must be "IgnoreCase"> startsWith ("hello", "he", "foo", 1) %!error <"IgnoreCase" value must be a logical scalar> %! startsWith ("hello", "hi", "i", "true"); %!error <"IgnoreCase" value must be a logical scalar> %! startsWith ("hello", "hi", "i", {true});