laravel collection wherein

1// The array we're going to return
2    $data = [];    
3// Query the users table
4$query = users::where('id', 1)->get();
5
6// Let's Map the results from [$query]
7$map = $query->map(
8    function($items){
9          $data['user_firstName'] = $items->firstName;
10          $data['user_lastName'] = $items->lastName;
11          return $data;
12        }
13    );
14
15return $map;

1$collection = collect([
2    ['product' => 'Desk', 'price' => 200],
3    ['product' => 'Chair', 'price' => 100],
4    ['product' => 'Bookcase', 'price' => 150],
5    ['product' => 'Door', 'price' => 100],
6]);
7
8$filtered = $collection->whereIn('price', [150, 200]);
9
10$filtered->all();
11
12/*
13    [
14        ['product' => 'Bookcase', 'price' => 150],
15        ['product' => 'Desk', 'price' => 200],
16    ]
17*/

1$collection = collect([
2    ['product' => 'Desk', 'price' => 200],
3    ['product' => 'Chair', 'price' => 100],
4    ['product' => 'Bookcase', 'price' => 150],
5    ['product' => 'Door', 'price' => 100],
6]);
7
8$filtered = $collection->where('price', 100);
9
10$filtered->all();
11
12/*
13    [
14        ['product' => 'Chair', 'price' => 100],
15        ['product' => 'Door', 'price' => 100],
16    ]
17*/