laravel mapwithkeys

1$collection = collect([1, 2, 3, 4]);
2
3$filtered = $collection->filter(function ($value, $key) {
4    return $value > 2;
5});
6
7$filtered->all();
8
9// [3, 4]

1$collection = collect([
2    [
3        'name' => 'John',
4        'department' => 'Sales',
5        'email' => 'john@example.com',
6    ],
7    [
8        'name' => 'Jane',
9        'department' => 'Marketing',
10        'email' => 'jane@example.com',
11    ]
12]);
13
14$keyed = $collection->mapWithKeys(function ($item) {
15    return [$item['email'] => $item['name']];
16});
17
18$keyed->all();
19
20/*
21    [
22        'john@example.com' => 'John',
23        'jane@example.com' => 'Jane',
24    ]
25*/

1$collection = collect([
2    [
3        'name' => 'John',
4        'department' => 'Sales',
5        'email' => 'john@example.com'
6    ],
7    [
8        'name' => 'Jane',
9        'department' => 'Marketing',
10        'email' => 'jane@example.com'
11    ]
12]);
13
14$keyed = $collection->mapWithKeys(function ($item) {
15    return [$item['email'] => $item['name']];
16});
17
18$keyed->all();
19
20/*
21    [
22        'john@example.com' => 'John',
23        'jane@example.com' => 'Jane',
24    ]
25*/