컬렉션 ( 거부 - 고유 ) - Laravel

$collection = collect([1, 2, 3, 4]);

$filtered = $collection->reject(function ($value, $key) {
    return $value > 2;
});

$filtered->all();

// [1, 2]

use Illuminate\Support\Collection;
use Illuminate\Support\Str;

// Create a new collection instance.
$collection = new Collection([
    'Alice', 'Anna', 'Bob', 'Bev'
]);

// Only keep names that begin with the letter 'a'.
$names = $collection->reject(function($item), {
    return !Str::startsWith(Str::lower($item), 'a');
});

/* 
object(Illuminate\Support\Collection)
  protected 'items' =>
    array
      0 => string 'Alice'
      1 => string 'Anna'
*/

$names = $users->reject(function ($user) {
            return $user->active === false;
         })->map(function ($user) {
            return $user->name;
         });

$data = [1,2,4,5,3,2,2,4,5,6,8,9]; 
$data  = collect($data)->unique();  
dd($data);

/*
Array
(
    [0] => 1
    [1] => 2
    [2] => 4
    [3] => 5
    [4] => 3
    [9] => 6
    [10] => 8
    [11] => 9
)
*/

$data = collect( [
            [
                [ "id" => 1, "name" => "Hardik"],
                [ "id" => 1, "name" => "Hardik"],
                [ "id" => 2, "name" => "Mahesh"],
                [ "id" => 3, "name" => "Rakesh"],
            ],
            [
                [ "id" => 1, "name" => "Hardik"],
                [ "id" => 3, "name" => "Kiran"],
            ]
        ] );

$data = $data->map(function ($array) {
       return collect($array)->unique('id')->all();
});   
dd($data);

/*
Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [name] => Hardik
                )
            [2] => Array
                (
                    [id] => 2
                    [name] => Mahesh
                )
            [3] => Array
                (
                    [id] => 3
                    [name] => Rakesh
                )
        )
    [1] => Array
        (
            [0] => Array
                (
                    [id] => 1
                    [name] => Hardik
                )
            [1] => Array
                (
                    [id] => 3
                    [name] => Kiran
                )
        )
)
*/