[PHP] opposite of array_unique()?
array_unique() removes duplicate values from an array. Is there an opposite function or way of keeping all values in a single dimentional array that are duplicates and removing all that are duplicates? for example if I have an array: array( [0] = 'dog', [1] = 'cat', [2] = 'rabbit', [3] = 'cat') how do I make it just have array ( [0] = 'cat' )? i want to drop the non-duplicates and trim the array to only have one of the duplicates? -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] opposite of array_unique()?
$animals = array('dog', 'cat', 'rabbit', 'cat');
$duplicates = array_count_values($animals);
foreach($duplicates as $key = $value)
if($value 1)
$new_array[] = $key;
print_r($new_array);
afan
At 02:20 PM 8/4/2004, Adam Williams wrote:
array_unique() removes duplicate values from an array.
Is there an opposite function or way of keeping all values in a single
dimentional array that are duplicates and removing all that are
duplicates?
for example if I have an array:
array( [0] = 'dog', [1] = 'cat', [2] = 'rabbit', [3] = 'cat')
how do I make it just have array ( [0] = 'cat' )? i want to drop the
non-duplicates and trim the array to only have one of the duplicates?
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Re: [PHP] opposite of array_unique()?
* Thus wrote Adam Williams: for example if I have an array: array( [0] = 'dog', [1] = 'cat', [2] = 'rabbit', [3] = 'cat') how do I make it just have array ( [0] = 'cat' )? i want to drop the non-duplicates and trim the array to only have one of the duplicates? If you're pulling this data from a sql table, then you're better off having the database server do this work for you. Curt -- First, let me assure you that this is not one of those shady pyramid schemes you've been hearing about. No, sir. Our model is the trapezoid! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
Re: [PHP] opposite of array_unique()?
you could loop thru the array, and using a nested loop, test each value against all other values.. and keep ones that match in a new array. But as mentioned, SQL would be easier. Jason Curt Zirzow [EMAIL PROTECTED] wrote: * Thus wrote Adam Williams: for example if I have an array: array( [0] = 'dog', [1] = 'cat', [2] = 'rabbit', [3] = 'cat') how do I make it just have array ( [0] = 'cat' )? i want to drop the non-duplicates and trim the array to only have one of the duplicates? If you're pulling this data from a sql table, then you're better off having the database server do this work for you. Curt -- First, let me assure you that this is not one of those shady pyramid schemes you've been hearing about. No, sir. Our model is the trapezoid! -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php -- PHP General Mailing List (http://www.php.net/) To unsubscribe, visit: http://www.php.net/unsub.php
