problems with duplicate values

[yoki]

Hi,

I wonder if there is another simpler solution to my problem. Ok I'm trying to pass the following array:

Array ( [0] => Cadence Healthcare, Montreal, Canada [1] => Cadence Healthcare, Montreal, Canada [2] => Pfizer, Montreal, Canada [3] => Pfizer, Montreal, Canada )

to these two functions:

This function checks $array for duplicate values and returns an array containing the keys of duplicates

function unique_events($array){

$count= array_key_intersect($array, array_flip(array_count_values($array)));

foreach($array as $key=>$value)
{
if (in_array($value,$count))
{
$return[$value][]=$key;
}
}

return $return;
}

function array_key_intersect(&$a, &$b) {
$array = array();
while (list($key,$value) = each($a)) {
if (isset($b[$key]))
$array[$key] = $value;
}
return $array;
}

Here is the result of what function unique_events returns:

Array ( [Pfizer, Montreal, Canada] => Array ( [0] => 2 [1] => 3 ) )

What I'm trying to obtain is:

Array ( [Cadence Healthcare, Montreal, Canada] => Array ( [0] => 0 [1] => 1)[Pfizer, Montreal, Canada] => Array ( [0] => 2 [1] => 3 ) )

If also I try a different combination in my array, say for example this:

Array ( [0] => Cadence Healthcare, Montreal, Canada [1] => Merck, Montreal, Canada [2] => Pfizer, Montreal, Canada )

I get the following:

Array ( [Merck, Montreal, Canada] => Array ( [0] => 1 ) )

What I'm trying to obtain is:

Array ( [Cadence Healthcare, Montreal, Canada] => Array ( [0] => 0 ) [Merck, Montreal, Canada] => Array ( [0] => 1 [Pfizer, Montreal, Canada] => Array ( [0] => 2 )) )

Something is probably duplicated or skipped and i'm not sure why is that...There has to be a workaround to this? Anyone? 🙁

[gammaster]

You can use this function:

// Get duplicated values from an array.
function getDuplicated($arr)
{
	$retur = array();

foreach($arr as $key => $elem) {
	$found  = array_keys($retur);
	if(!in_array($elem, $found)) {
		$search = array_keys($arr, $elem);
		if(sizeof($search) > 1)
			$retur[$elem] = $search;
		}
	}

return $retur;
}

Here is a test script:

// Get duplicated values from an array.
function getDuplicated($arr)
{
	$retur = array();

foreach($arr as $key => $elem) {
	$found  = array_keys($retur);
	if(!in_array($elem, $found)) {
		$search = array_keys($arr, $elem);
		if(sizeof($search) > 1)
			$retur[$elem] = $search;
		}
	}

return $retur;
}

$testArray = array(
				'Cadence Healthcare, Montreal, Canada',
				'Cadence Healthcare, Montreal, Canada',
				'Pfizer, Montreal, Canada',
				'Pfizer, Montreal, Canada'
				);

$dublicated = getDuplicated($testArray);

echo '<pre>';
print_r(getDuplicated($testArray));
echo '</pre>';

The output:

Array
(
[Cadence Healthcare, Montreal, Canada] => Array
(
[0] => 0
[1] => 1
)

[Pfizer, Montreal, Canada] => Array
    (
        [0] => 2
        [1] => 3
    )

)

[gammaster]

Better version of the function:

// Get duplicated values from an array.
function getDuplicated($arr)
{
	$retur = array();

foreach($arr as $key => $elem) {
	if(!array_key_exists($elem, $retur)) {
		$search = array_keys($arr, $elem);
		if(sizeof($search) > 1)
			$retur[$elem] = $search;
		}
	}

return $retur;
}