Add/Remove element in reference array from a given array

add_remove_elements.md

Scenario:

1. Item is shared to groups [6,5]
2. I want to edit item to share to groups [5,4]
   • in result, 6 will be remove and 4 will be added while 5 is as is

<?php

    $shared_groups = [6,5];
    $group_ids = [5,4];

    $new_groups = array_diff($group_ids, $shared_groups);
    $as_is_groups = array_intersect($shared_groups, $group_ids);
    $to_delete_groups = array_diff($shared_groups, $as_is_groups);
    dd(
        'inputs', array($shared_groups, $group_ids),
        'new groups', $new_groups,
        'existing', $as_is_groups,
        'remove', $to_delete_groups
    );