php - algorithm to find places in sorted array -



php - algorithm to find places in sorted array -

i have sorted array of keys , value like

array ( [1] => array ( [value] => 65 ...... ) [0] => array ( [value] => 65 ) [5] => array ( [value] => 35 ) [4] => array ( [value] => 3 ) [2] => array ( [value] => 0 ) [3] => array ( [value] => 0 ) )

i search simple algorithm run on array , homecoming array of places :

places['1'] = keys => array(1,0), value => 65 places['2'] = keys => array(5), value => 35 places['3'] = keys => array(4), value => 3 places['4'] = keys => array(2,3), value => 0

so in first place have key 1 + 0, , value 65 , on.......

i seek loop foreach , add together lot of if conditions, search simple

thanks

i assume mean places['4'] in lastly line. if so, should (otherwise have explain why there 2 ;)):

$placeindex = 0; $lastvalue = null; $places = array(); foreach($array $key => $value) { if($value['value'] === $lastvalue) { $places[$placeindex]['keys'][] = $key; } else { $placeindex++; $lastvalue = $value['value']; $places[$placeindex] = array( 'keys' => array($key), 'value' => $lastvalue ); } }

php arrays

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