Laravel Collection Duplicates Method Example

Today, i will let you know example of laravel collection duplicates example. i explained simply about laravel collection duplicates count. This article goes in detailed on laravel collection count duplicates. This article goes in detailed on duplicate collection laravel example.

I will give you simple example of duplicates colletion in laravel. so you can easily use it with your laravel 5, laravel 6, laravel 7, laravel 8, laravel 9 and laravel 10 application. so let's see bellow example that will helps you lot.

Syntax:

$collecton->duplicates(
    Key As Optional
);

Laravel Collection duplicates() Example

public function index()
{
    $collection = collect([1, 2, 3, 3, 4, 4, 4, 5]);
  
    $collection = $collection->duplicates();
        
    dd($collection);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [3] => 3
            [5] => 4
            [6] => 4
        )
)

Laravel Collection duplicates() with Argument Example

public function index()
{
    $collection = collect([
            ["id"=>1, "name"=>"Hardik", "role"=>"Admin"],
            ["id"=>2, "name"=>"Paresh", "role"=>"Admin"],
            ["id"=>3, "name"=>"Rakesh", "role"=>"User"],
        ]);
  
    $collection = $collection->duplicates('role');
        
    dd($collection);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [1] => Admin
        )
)

Laravel Collection duplicates Count Example

public function index()
{
    $collection = collect([
            ['id'=>1, 'name'=>'Hardik', 'city' => 'Mumbai', 'country' => 'India'],
            ['id'=>2, 'name'=>'Vimal', 'city' => 'New York', 'country' => 'US'],
            ['id'=>3, 'name'=>'Harshad', 'city' => 'Gujarat', 'country' => 'India'],
            ['id'=>4, 'name'=>'Harsukh', 'city' => 'New York', 'country' => 'US'],
        ]);
  
    $grouped = $collection->groupBy('country')->map(function ($row) {
                    return $row->count();
                });
        
    dd($grouped);
}

Output:

Illuminate\Support\Collection Object
(
    [items:protected] => Array
        (
            [India] => 2
            [US] => 2
        )
)

I hope it can help you...