Created
February 22, 2012 10:40
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PHPGangsta: Doppelte Array-Einträge entfernen
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<?php | |
if (extension_loaded('xdebug')) { | |
echo "WARNING: xdebug is enabled\n"; | |
} | |
function _count() | |
{ | |
$array = array(1, 5, 8, 'Michael', 5, 4, 9, 'Martin', 18, 12, 'Michael', 4, 12); | |
$counts = array_count_values($array); | |
foreach ($counts as $value => $counter) { | |
if ($counter > 1) { | |
unset($counts[$value]); | |
} | |
} | |
$v = array_keys($counts); | |
} | |
function _diff() | |
{ | |
$array = array(1, 5, 8, 'Michael', 5, 4, 9, 'Martin', 18, 12, 'Michael', 4, 12); | |
$v = array_diff($array, array_diff_assoc($array, array_unique($array))); | |
} | |
function _foreach() | |
{ | |
$array = array(1, 5, 8, 'Michael', 5, 4, 9, 'Martin', 18, 12, 'Michael', 4, 12); | |
$index = array(); | |
$duplicate = array(); | |
foreach ($array as $i => $a) { | |
if (isset($index[$a])) { | |
unset($array[$index[$a]]); | |
unset($array[$i]); | |
unset($index[$a]); | |
$duplicate[$a] = true; | |
continue; | |
} | |
if (isset($duplicate[$a])) { | |
unset($array[$i]); | |
continue; | |
} | |
$index[$a] = $i; | |
} | |
$v = $array; | |
} | |
$data = array(); | |
$functions = array( | |
'_count', | |
'_diff', | |
'_foreach', | |
); | |
$res = array(); | |
$mem = array(); | |
foreach( $functions as $k ) | |
{ | |
$iterations = 3; | |
$rest = array(); | |
$t = memory_get_usage(); | |
//ob_start(); | |
$start = microtime(true); | |
while (--$iterations) { | |
$k(); | |
} | |
$end = microtime(true); | |
//ob_get_clean(); | |
$res[$k] = $end - $start; | |
$mem[$k] = (memory_get_usage() - $t) / 1024; | |
} | |
echo "results, fastest first:\n"; | |
asort($res); | |
foreach ($res as $k => $d) { | |
printf("%-20s %0.10f %0.4f\n", $k, $d, $mem[$k]); | |
} |
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