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annotate scripts/strings/strcat.m @ 11523:fd0a3ac60b0e
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author | John W. Eaton <jwe@octave.org> |
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date | Fri, 14 Jan 2011 05:47:45 -0500 |
parents | 01ddaedd6ad5 |
children | cefd568ea073 |
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11523 | 1 ## Copyright (C) 1994-2011 John W. Eaton |
10032 | 2 ## Copyright (C) 2009 Jaroslav Hajek |
2313 | 3 ## |
4 ## This file is part of Octave. | |
5 ## | |
6 ## Octave is free software; you can redistribute it and/or modify it | |
7 ## under the terms of the GNU General Public License as published by | |
7016 | 8 ## the Free Software Foundation; either version 3 of the License, or (at |
9 ## your option) any later version. | |
2313 | 10 ## |
11 ## Octave is distributed in the hope that it will be useful, but | |
12 ## WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 ## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
14 ## General Public License for more details. | |
15 ## | |
16 ## You should have received a copy of the GNU General Public License | |
7016 | 17 ## along with Octave; see the file COPYING. If not, see |
18 ## <http://www.gnu.org/licenses/>. | |
920 | 19 |
3361 | 20 ## -*- texinfo -*- |
21 ## @deftypefn {Function File} {} strcat (@var{s1}, @var{s2}, @dots{}) | |
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22 ## Return a string containing all the arguments concatenated |
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23 ## horizontally. If the arguments are cells strings, @code{strcat} |
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24 ## returns a cell string with the individual cells concatenated. |
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25 ## For numerical input, each element is converted to the |
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26 ## corresponding ASCII character. Trailing white space is eliminated. |
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27 ## For example: |
3426 | 28 ## |
3361 | 29 ## @example |
30 ## @group | |
31 ## s = [ "ab"; "cde" ]; | |
32 ## strcat (s, s, s) | |
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33 ## @result{} ans = |
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34 ## "ab ab ab " |
3361 | 35 ## "cdecdecde" |
36 ## @end group | |
37 ## @end example | |
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38 ## |
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39 ## @example |
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40 ## @group |
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41 ## s = @{ "ab"; "cde" @}; |
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42 ## strcat (s, s, s) |
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43 ## @result{} ans = |
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44 ## @{ |
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45 ## [1,1] = ababab |
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46 ## [2,1] = cdecdecde |
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47 ## @} |
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48 ## @end group |
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49 ## @end example |
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50 ## |
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51 ## @seealso{cstrcat, char, strvcat} |
3361 | 52 ## @end deftypefn |
2697 | 53 |
2314 | 54 ## Author: jwe |
55 | |
6138 | 56 function st = strcat (varargin) |
920 | 57 |
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58 if (nargin > 0) |
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59 if (nargin == 1) |
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60 st = varargin{1}; |
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61 elseif (nargin > 1) |
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62 ## Convert to cells of strings |
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63 uo = "uniformoutput"; |
10032 | 64 reals = cellfun (@isreal, varargin); |
65 if (any (reals)) | |
66 varargin(reals) = cellfun (@char, varargin(reals), uo, false); | |
67 endif | |
68 chars = cellfun (@ischar, varargin); | |
69 allchar = all (chars); | |
70 varargin(chars) = cellfun (@cellstr, varargin(chars), uo, false); | |
71 if (! all (cellfun (@iscell, varargin))) | |
72 error ("strcat: inputs must be strings or cells of strings"); | |
73 endif | |
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74 |
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75 ## We don't actually need to bring all cells to common size, because |
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76 ## cellfun can now expand scalar cells. |
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77 err = common_size (varargin{:}); |
10032 | 78 |
79 if (err) | |
80 error ("strcat: arguments must be the same size, or be scalars"); | |
81 endif | |
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82 |
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83 ## Cellfun handles everything for us. |
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84 st = cellfun (@horzcat, varargin{:}, uo, false); |
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85 |
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86 if (allchar) |
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87 ## If all inputs were strings, return strings. |
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88 st = char (st); |
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89 endif |
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90 endif |
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91 else |
6046 | 92 print_usage (); |
920 | 93 endif |
94 | |
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95 endfunction |
920 | 96 |
6138 | 97 ## test the dimensionality |
98 ## 1d | |
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99 %!assert(strcat("ab ", "ab "), "abab") |
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100 %!assert(strcat({"ab "}, "ab "), {"ab ab"}) |
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101 %!assert(strcat("ab ", {"ab "}), {"abab "}) |
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102 %!assert(strcat({"ab "}, {"ab "}), {"ab ab "}) |
7813 | 103 %!assert(strcat("", "ab"), "ab") |
104 %!assert(strcat("", {"ab"}, {""}), {"ab"}) | |
6138 | 105 ## 2d |
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106 %!assert(strcat(["ab ";"cde"], ["ab ";"cde"]), ["abab ";"cdecde"]) |
7411 | 107 |
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108 ## test for deblanking implied trailing spaces of character input |
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109 %!assert((strcmp (strcat ("foo", "bar"), "foobar") |
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110 %! && strcmp (strcat (["a"; "bb"], ["foo"; "bar"]), ["afoo "; "bbbar"]))); |
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111 |
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112 ## test for mixing character and cell inputs |
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113 %!assert(all (strcmp (strcat ("a", {"bc", "de"}, "f"), {"abcf", "adef"}))) |
7411 | 114 |
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115 ## test for scalar strings with vector strings |
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116 %!assert(all (strcmp (strcat (["a"; "b"], "c"), ["ac"; "bc"]))) |
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117 |
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118 ## test with cells with strings of differing lengths |
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119 %!assert(all (strcmp (strcat ({"a", "bb"}, "ccc"), {"accc", "bbccc"}))) |
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120 %!assert(all (strcmp (strcat ("a", {"bb", "ccc"}), {"abb", "accc"}))) |
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121 |
7411 | 122 %!error strcat (); |
123 | |
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124 %!assert (strcat (1, 2), strcat (char(1), char(2))) |
7411 | 125 |
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126 %!assert (strcat ('', 2), strcat ([], char(2))) |
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127 |