Mercurial > octave
annotate scripts/strings/strcat.m @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
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date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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27919
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update Octave Project Developers copyright for the new year
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1 ## Copyright (C) 1994-2020 The Octave Project Developers |
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2 ## |
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3 ## See the file COPYRIGHT.md in the top-level directory of this distribution |
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4 ## or <https://octave.org/COPYRIGHT.html/>. |
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5 ## |
2313 | 6 ## |
7 ## This file is part of Octave. | |
8 ## | |
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9 ## Octave is free software: you can redistribute it and/or modify it |
2313 | 10 ## under the terms of the GNU General Public License as published by |
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11 ## the Free Software Foundation, either version 3 of the License, or |
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12 ## (at your option) any later version. |
2313 | 13 ## |
14 ## Octave is distributed in the hope that it will be useful, but | |
15 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
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16 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 ## GNU General Public License for more details. |
2313 | 18 ## |
19 ## You should have received a copy of the GNU General Public License | |
7016 | 20 ## along with Octave; see the file COPYING. If not, see |
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21 ## <https://www.gnu.org/licenses/>. |
920 | 22 |
3361 | 23 ## -*- texinfo -*- |
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24 ## @deftypefn {} {} strcat (@var{s1}, @var{s2}, @dots{}) |
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25 ## Return a string containing all the arguments concatenated |
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26 ## horizontally. |
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27 ## |
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28 ## If the arguments are cell strings, @code{strcat} returns a cell string |
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29 ## with the individual cells concatenated. For numerical input, each element |
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30 ## is converted to the corresponding ASCII character. Trailing white space |
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31 ## for any character string input is eliminated before the strings are |
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32 ## concatenated. Note that cell string values do @strong{not} have |
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33 ## whitespace trimmed. |
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34 ## |
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35 ## For example: |
3426 | 36 ## |
3361 | 37 ## @example |
38 ## @group | |
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39 ## strcat ("|", " leading space is preserved", "|") |
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40 ## @result{} | leading space is preserved| |
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41 ## @end group |
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42 ## @end example |
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43 ## |
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44 ## @example |
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45 ## @group |
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46 ## strcat ("|", "trailing space is eliminated ", "|") |
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47 ## @result{} |trailing space is eliminated| |
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48 ## @end group |
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49 ## @end example |
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50 ## |
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51 ## @example |
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52 ## @group |
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53 ## strcat ("homogeneous space |", " ", "| is also eliminated") |
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54 ## @result{} homogeneous space || is also eliminated |
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55 ## @end group |
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56 ## @end example |
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57 ## |
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58 ## @example |
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59 ## @group |
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61 ## strcat (s, s, s) | |
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62 ## @result{} |
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63 ## "ababab " |
3361 | 64 ## "cdecdecde" |
65 ## @end group | |
66 ## @end example | |
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67 ## |
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68 ## @example |
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69 ## @group |
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70 ## s = @{ "ab"; "cd " @}; |
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71 ## strcat (s, s, s) |
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72 ## @result{} |
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73 ## @{ |
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74 ## [1,1] = ababab |
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75 ## [2,1] = cd cd cd |
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76 ## @} |
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77 ## @end group |
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78 ## @end example |
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79 ## |
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80 ## @seealso{cstrcat, char, strvcat} |
3361 | 81 ## @end deftypefn |
2697 | 82 |
6138 | 83 function st = strcat (varargin) |
920 | 84 |
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85 if (nargin == 0) |
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86 st = ""; |
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87 elseif (nargin == 1) |
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88 if (iscellstr (varargin{1})) |
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89 st = varargin{1}; |
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90 elseif (isreal (varargin{1}) || ischar (varargin{1})) |
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91 st = char (cellstr (varargin{1})); |
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92 else |
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93 error ("strcat: inputs must be strings or cells of strings"); |
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94 endif |
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95 else |
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96 ## Convert to cells of strings |
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97 uo = "uniformoutput"; |
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98 reals = cellfun ("isreal", varargin); |
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99 if (any (reals)) |
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100 varargin(reals) = cellfun ("char", varargin(reals), uo, false); |
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101 endif |
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102 chars = cellfun ("isclass", varargin, "char"); |
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103 allchar = all (chars); |
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104 varargin(chars) = cellfun ("cellstr", varargin(chars), uo, false); |
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105 if (! all (cellfun ("isclass", varargin, "cell"))) |
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106 error ("strcat: inputs must be strings or cells of strings"); |
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107 endif |
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108 |
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109 ## We don't actually need to bring all cells to common size, because |
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110 ## cellfun can now expand scalar cells. |
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111 err = common_size (varargin{:}); |
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112 |
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113 if (err) |
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114 error ("strcat: arguments must be the same size, or be scalars"); |
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115 endif |
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116 |
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117 ## Cellfun handles everything for us. |
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118 st = cellfun ("horzcat", varargin{:}, uo, false); |
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119 |
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120 if (allchar) |
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121 ## If all inputs were strings, return strings. |
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122 st = char (st); |
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123 endif |
920 | 124 endif |
125 | |
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126 endfunction |
920 | 127 |
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128 |
6138 | 129 ## test the dimensionality |
130 ## 1d | |
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131 %!assert (strcat ("ab ", "ab "), "abab") |
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132 %!assert (strcat ({"ab "}, "ab "), {"ab ab"}) |
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133 %!assert (strcat ("ab ", {"ab "}), {"abab "}) |
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134 %!assert (strcat ({"ab "}, {"ab "}), {"ab ab "}) |
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135 %!assert (strcat ("", "ab"), "ab") |
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136 %!assert (strcat ("", {"ab"}, {""}), {"ab"}) |
6138 | 137 ## 2d |
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138 %!assert (strcat (["ab ";"cde"], ["ab ";"cde"]), ["abab ";"cdecde"]) |
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140 ## test for deblanking implied trailing spaces of character input |
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141 %!assert (strcat ("foo", "bar"), "foobar") |
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142 %!assert (strcat (["a "; "bb"], ["foo"; "bar"]), ["afoo "; "bbbar"]) |
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143 |
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144 ## test for mixing character and cell inputs |
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145 %!assert (strcat ("a", {"bc", "de"}, "f"), {"abcf", "adef"}) |
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147 ## test for scalar strings with vector strings |
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148 %!assert (strcat (["a"; "b"], "c"), ["ac"; "bc"]) |
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149 |
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150 ## test with cells with strings of differing lengths |
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151 %!assert (all (strcmp (strcat ({"a", "bb"}, "ccc"), {"accc", "bbccc"}))) |
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152 %!assert (all (strcmp (strcat ("a", {"bb", "ccc"}), {"abb", "accc"}))) |
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154 ## test with a single string or cell input |
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155 %!assert <*49094> (strcat ("foo "), "foo") |
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156 %!assert <*49094> (strcat ({"foo"}), {"foo"}) |
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157 |
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158 %!assert (strcat (1), char (1)) |
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159 %!assert (strcat (1, 2), strcat (char (1), char (2))) |
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160 %!assert (strcat ("", 2), strcat ([], char (2))) |
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162 %!assert (strcat (), "") |