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annotate scripts/strings/endsWith.m @ 28212:d052c11d47c6

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Add new functions startsWith and endsWith (bug #57041). * scripts/strings: Add startsWith.m and endsWith.m. * scripts/strings/module.mk: Add references to new files. * doc/interpreter/strings.txi: Add docstrings to manual. * NEWS: Add to list of new functions. * scripts/help/__unimplemented__.m: Remove the two functions.
author Abdallah Elshamy <abdallah.k.elshamy@gmail.com>
date Sun, 29 Mar 2020 22:15:32 +0200
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children 49384057fb03
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28212
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1 ########################################################################
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2 ##
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3 ## Copyright (C) 2020 The Octave Project Developers
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4 ##
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5 ## See the file COPYRIGHT.md in the top-level directory of this
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6 ## distribution or <https://octave.org/copyright/>.
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7 ##
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8 ## This file is part of Octave.
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9 ##
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10 ## Octave is free software: you can redistribute it and/or modify it
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11 ## under the terms of the GNU General Public License as published by
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12 ## the Free Software Foundation, either version 3 of the License, or
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13 ## (at your option) any later version.
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14 ##
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15 ## Octave is distributed in the hope that it will be useful, but
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16 ## WITHOUT ANY WARRANTY; without even the implied warranty of
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17 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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18 ## GNU General Public License for more details.
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19 ##
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20 ## You should have received a copy of the GNU General Public License
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21 ## along with Octave; see the file COPYING. If not, see
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22 ## <https://www.gnu.org/licenses/>.
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23 ##
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24 ########################################################################
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25
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26 ## -*- texinfo -*-
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27 ## @deftypefn {} {@var{retval} =} endsWith (@var{str}, @var{pattern})
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28 ## @deftypefnx {} {@var{retval} =} endsWith (@var{str}, @var{pattern}, "IgnoreCase", @var{confirm_ignore})
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29 ## Checks that a cell array of strings ends with a pattern
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30 ##
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31 ## Return an array of logical values that indicates which strings in the cell
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32 ## array of strings --- or the string --- @var{str} ends with a string in the
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33 ## cell array of strings --- or the string --- @var{pattern}.
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34 ##
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35 ## If the parameter @qcode{"IgnoreCase"} is set to true, then the function
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36 ## will ignore the letter case of @var{str} and @var{pattern}. By default, the
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37 ## comparison is case sensitive.
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38 ##
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39 ## Examples:
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40 ##
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41 ## @example
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42 ## ## one string and one pattern while considering case
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43 ## endsWith ("hello", "lo")
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44 ## @result{} 1
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45 ##
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46 ## ## one string and one pattern while ignoring case
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47 ## endsWith ("hello", "LO", "IgnoreCase", true)
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48 ## @result{} 1
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49 ##
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50 ## ## multiple strings and multiple patterns while considering case
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51 ## endsWith (@{"tests.txt", "mydoc.odt", "myFunc.m", "results.pptx"@},
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52 ## @{".docx", ".odt", ".txt"@})
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53 ## @result{} 1 1 0 0
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54 ##
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55 ## ## multiple strings and one pattern while considering case
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56 ## endsWith (@{"TESTS.TXT", "mydoc.odt", "result.txt", "myFunc.m"@},
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57 ## ".txt", "IgnoreCase", false)
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58 ## @result{} 0 0 1 0
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59 ##
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60 ## ## multiple strings and one pattern while ignoring case
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61 ## endsWith (@{"TESTS.TXT", "mydoc.odt", "result.txt", "myFunc.m"@},
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62 ## ".txt", "IgnoreCase", true)
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63 ## @result{} 1 0 1 0
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64 ## @end example
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65 ##
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66 ## @seealso{startsWith, strcmp, strcmpi}
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67 ## @end deftypefn
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68
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69 function retval = endsWith (str, pattern, ignore_case, confirm_ignore)
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70 if (! (nargin == 2 || nargin == 4))
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71 print_usage ();
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72 endif
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73
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74 ## check input str and pattern
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75 if (! (iscellstr (str) || ischar (str))
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76 || ! (iscellstr (pattern) || ischar (pattern)))
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77 error ("endsWith: arguments must be strings or cell arrays of strings");
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78 else
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79 str = cellstr (str);
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80 pattern = cellstr (pattern);
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81 endif
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82
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83 retval = zeros (size (str));
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84
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85 ## reverse str and pattern
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86 for j = 1:numel (str)
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87 str{j} = flip (str{j});
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88 endfor
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89 for j = 1:numel (pattern)
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90 pattern{j} = flip (pattern{j});
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91 endfor
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92
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93 if (nargin == 2)
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94 IgnoreFlag = false;
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95 endif
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96
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97 if (nargin == 4)
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98 ## checks third input argument
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99 if (! ischar (ignore_case) || isempty (ignore_case))
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100 error ('endsWith: third input must be "IgnoreCase"');
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101 endif
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102
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103 ## to be compatible with MATLAB
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104 ## (MATLAB accepts the command with "I", "i", "Ig", "IG" ..etc )
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105 if (! strncmpi (ignore_case, "IgnoreCase", length (ignore_case)))
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106 error (['endsWith: invalid argument "%s"; ', ...
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107 'third input must be "IgnoreCase"'], ignore_case);
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108 endif
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109
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110 if (numel (confirm_ignore) != 1)
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111 error ("endsWith: 'IgnoreCase' value must be a logical scalar");
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112 endif
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113
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114 ## to be compatible with MATLAB
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115 ## (MATLAB accepts the command with true, 5, 1 ..etc )
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116 try
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117 IgnoreFlag = logical (confirm_ignore);
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118 catch
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119 error ("endsWith: 'IgnoreCase' value must be a logical scalar");
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120 end_try_catch
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121 endif
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122
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123 if (IgnoreFlag)
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124 for j = 1:numel (pattern)
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125 retval |= strncmpi (str, pattern{j}, length (pattern{j}));
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126 endfor
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127 else
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128 for j = 1:numel (pattern)
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129 retval |= strncmp (str, pattern{j}, length (pattern{j}));
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130 endfor
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131 endif
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132
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133 endfunction
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134
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135
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136 ## Test simple use with one string and one pattern
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137 %!assert (endsWith ("hello", "lo"))
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138 %!assert (! endsWith ("hello", "LO"))
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139 %!assert (endsWith ("hello", "LO", "i", 5)) # check compatibility with MATLAB
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140 %!assert (! endsWith ("hello", "no"))
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141
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142 ## Test multiple strings with a single pattern
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143 %!test
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144 %! str = {"myFile.odt", "results.ppt", "myCode.m"; ...
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145 %! "data-analysis.ppt", "foundations.txt", "data.odt"};
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146 %! pattern = ".odt";
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147 %! correct_ans = [true, false, false; false, false, true];
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148 %! assert (endsWith (str, pattern), correct_ans)
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149
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150 ## Test multiple strings with multiple patterns
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151 %!test
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152 %! str = {"tests.txt", "mydoc.odt", "myFunc.m", "results.pptx"};
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153 %! pattern = {".docx", ".odt", ".txt"};
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154 %! correct_ans = [true, true, false, false];
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155 %! assert (endsWith (str, pattern), correct_ans)
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156
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157 ## Test IgnoreCase
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158 %!test
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159 %! str = {"TESTS.TXT", "mydoc.odt", "result.txt", "myFunc.m"};
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160 %! pattern = ".txt";
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161 %! correct_ans_with_ignore = [true, false, true, false];
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162 %! correct_ans_without_ignore = [false, false, true, false];
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163 %! assert (endsWith (str, pattern, "IgnoreCase", true), ...
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164 %! correct_ans_with_ignore)
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165 %! assert (endsWith (str, pattern, "IgnoreCase", false), ...
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166 %! correct_ans_without_ignore)
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167 %! assert (endsWith (str, pattern, "I", 500), ...
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168 %! correct_ans_with_ignore) # check compatibility with MATLAB
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169 %! assert (endsWith (str, pattern, "iG", 0), ...
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170 %! correct_ans_without_ignore) # check compatibility with MATLAB
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171
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172 ## Test error detection
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173 %!error <must be strings or cell arrays of strings> endsWith (152, "hi")
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174
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175 %!error <must be strings or cell arrays of strings> endsWith ("hello", 152)
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176
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177 %!error <'IgnoreCase' value must be a logical scalar> ...
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178 %! endsWith ("hello", "hi", "i", "true")
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179
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180 %!error <'IgnoreCase' value must be a logical scalar> ...
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181 %! endsWith ("hello", "hi", "i", [1, 2])
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182
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183 %!error <invalid argument "ignire"; third input must be> ...
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184 %! endsWith ("hello", "he", "ignire", 1)
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185
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186 %!error <invalid argument "IgnoreCasefd"; third input must be> ...
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187 %! endsWith ("hello", "he", "IgnoreCasefd", 1)
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188
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189 %!error <third input must be "IgnoreCase"> endsWith ("hello", "he", "", 1)
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190
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191 %!error <third input must be "IgnoreCase"> endsWith ("hello", "he", 5, 1)