array-unique

This refers to one of my previous questions: array_unique vs array_flip - This states that array_flip(array_flip()) is much quicker than array_unique() when dealing with simple strings and integers. What I would like to know is why array_unique() creates a copy of the array, sorts it then removed the duplicates The source for both functions is available here . Thanks in advance! If you think about it algorithmically, the way to remove duplicates is to go through a list, keep track of items you find, and get rid of things that are already in that "found this" list. One easy way to accomplish

Not sure if this is possible but im trying to run array_unique over a collection of items i have, to remove duplicates. Although i cannot get it working. my controller logic: // init models $jobs = Job::search(); $countries = $jobs->get()->map(function( $job ) { return $job->country; }); $countries = array_unique( $countries->toArray() ); although this gets a "Array to string conversion" error You can have unique values in your DB results using distinct or group by in your select clause. But, if you really need to have unique values over an array of object you can do the following: $uniques =

This question already has an answer here: case-insensitive array_unique 5 answers I found a few solutions but I can't decide which one to use. What is the most compact and effective solution to use php's array_unique() function on a case-insensitive array? Example: $input = array('green', 'Green', 'blue', 'yellow', 'blue'); $result = array_unique($input); print_r($result); Result: Array ( [0] => green [1] => Green [2] => blue [3] => yellow ) How do we remove the duplicate green ? As far as which one to remove, we assume that duplicates with uppercase characters are correct. e.g. keep PHP

Is there an array function in PHP that somehow does array_merge, comparing the values , ignoring the keys? I think that array_unique(array_merge($a, $b)) works, however I believe there must be a nicer way to do this. eg. $a = array(0 => 0, 1 => 1, 2 => 2); $b = array(0 => 2, 1 => 3, 2 => 4); resulting in: $ab = array(0 => 0, 1 => 1, 2 => 2, 3 => 3, 4 => 4); Please note that I don't care about the keys in $ab , however it would be nice if they were ascending, starting at 0 to count($ab)-1 . The most elegant, simple, and efficient solution is the one mentioned in the original question... $ab =

I have the following variable $rows: Array ( [0] => stdClass Object ( [product_sku] => PCH20 ) [1] => stdClass Object ( [product_sku] => PCH20 ) [2] => stdClass Object ( [product_sku] => PCH19 ) [3] => stdClass Object ( [product_sku] => PCH19 ) ) I need to create second array $second containing only unique values: Array ( [0] => stdClass Object ( [product_sku] => PCH20 ) [1] => stdClass Object ( [product_sku] => PCH19 ) ) But when i run array_unique on $rows, i receive: Catchable fatal error : Object of class stdClass could not be converted to string on line 191 $uniques = array(); foreach (