03-06-2008
hmmm, I better go look closer at the ISO, but I think set<> is always sorted.
See
set - C++ Reference
GCC seems to think the set is sorted.
If the NULL is listed in the data as the character string "NULL", and that needs to be interpreted as 0, then maybe create a string derivative and specialize it's comparison method, then use a set of your specialized strings.
Last edited by WebKruncher; 03-06-2008 at 05:09 PM..
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LEARN ABOUT PHP
natcasesort
NATCASESORT(3) 1 NATCASESORT(3)
natcasesort - Sort an array using a case insensitive "natural order" algorithm
SYNOPSIS
bool natcasesort (array &$array)
DESCRIPTION
natcasesort(3) is a case insensitive version of natsort(3).
This function implements a sort algorithm that orders alphanumeric strings in the way a human being would while maintaining key/value
associations. This is described as a "natural ordering".
PARAMETERS
o $array
- The input array.
RETURN VALUES
Returns TRUE on success or FALSE on failure.
EXAMPLES
Example #1
natcasesort(3) example
<?php
$array1 = $array2 = array('IMG0.png', 'img12.png', 'img10.png', 'img2.png', 'img1.png', 'IMG3.png');
sort($array1);
echo "Standard sorting
";
print_r($array1);
natcasesort($array2);
echo "
Natural order sorting (case-insensitive)
";
print_r($array2);
?>
The above example will output:
Standard sorting
Array
(
[0] => IMG0.png
[1] => IMG3.png
[2] => img1.png
[3] => img10.png
[4] => img12.png
[5] => img2.png
)
Natural order sorting (case-insensitive)
Array
(
[0] => IMG0.png
[4] => img1.png
[3] => img2.png
[5] => IMG3.png
[2] => img10.png
[1] => img12.png
)
For more information see: Martin Pool's Natural Order String Comparison page.
SEE ALSO
natsort(3), The comparison of array sorting functions, strnatcmp(3), strnatcasecmp(3).
PHP Documentation Group NATCASESORT(3)