php - How to select multiple columns and filter duplicate values in Laravel?

I'm trying to select multiple columns and avoid duplicate values in these columns with Laravel. Here is my data:

id, name, job, department
[1, "Jane Doe", "worker", "departmentA"]
[2, "Adam Smith", "manager", "departmentB"]
[3, "Machiavelli", "worker", "departmentA"]
[4, "Rousseau", "worker", "departmentC"]

I want to get job and department without duplicate data. So I want this result:

[["worker", "manager"], ["departmentA", "departmentB", "departmentC"]]

I'm trying to get it with model like that:

$users = Users::all();
$user_fields = $users->pluck("job", "department")->toArray();
return $user_fields;

But it's not working. How can I do it?

Solution:

I dont think you can do it with one function.

But with two plucks it is simple:

$user_fields = 
    [
        $users->pluck("job")->unique()->values()->toArray(),
        $users->pluck("department")->unique()->values()->toArray()
    ];

Solution:

When you pluck 2 values, you're creating an associative array.

You can split them into separate arrays using array_keys and array_values. I would use array_unique to remove duplicates.

$users = Users::all();

$jobs_despartments = $users->pluck("job", "department")->all();

$jobs = array_unique(array_keys($jobs_despartments));
// ["worker", "manager"]

$departments = array_unique(array_values($jobs_despartments));
// ["departmentA", "departmentB", "departmentC"]