Matrix transposition: Difference between revisions
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(→{{header|Go}}: improve transpose in place to working program, add library solution.) |
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=={{header|PHP}}== |
=={{header|PHP}}== |
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<lang php>function transpose($m) { |
<lang php>function transpose($m) { |
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if (count($m) == 0) // special case: empty matrix |
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return array(); |
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else if (count($m) == 1) // special case: row matrix |
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return array_chunk($m[0], 1); |
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// array_map(NULL, m[0], m[1], ..) |
// array_map(NULL, m[0], m[1], ..) |
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array_unshift($m, NULL); // the original matrix is not modified because it was passed by value |
array_unshift($m, NULL); // the original matrix is not modified because it was passed by value |
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return call_user_func_array('array_map', $m); |
return call_user_func_array('array_map', $m); |
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}</lang> |
}</lang> |
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Caveat: this will not work correctly for a row matrix (matrix with only 1 row); it should return a column matrix (matrix where each row has length 1), but simply returns the row itself, which is a 1-dimensional array, not a matrix. |
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=={{header|PicoLisp}}== |
=={{header|PicoLisp}}== |
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