collection

Fungsi Collection Laravel11
===========================
1. pluck($column, $key = null)
📌Mengambil nilai dari satu kolom dalam Collection.

$users = collect([
    ['id' => 1, 'name' => 'Alice'],
    ['id' => 2, 'name' => 'Bob'],
]);

$names = $users->pluck('name');
// Hasil: ['Alice', 'Bob']

$namesWithKeys = $users->pluck('name', 'id');
// Hasil: [1 => 'Alice', 2 => 'Bob']



2. contains($value)
📌Memeriksa apakah Collection berisi nilai tertentu.
$collection = collect(['Laravel', 'PHP', 'Vue']);

$collection->contains('Laravel'); // true
$collection->contains('React');   // false


3. filter($callback)
 📌Menyaring Collection berdasarkan kondisi tertentu.
$users = collect([
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
    ['name' => 'Charlie', 'age' => 19],
]);

$adults = $users->filter(function ($user) {
    return $user['age'] >= 21;
});
// Hasil: Alice & Bob saja, karena umurnya >= 21


4. map($callback)
📌Mengubah setiap item dalam Collection dengan aturan tertentu.
$users = collect([
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
]);

$mappedUsers = $users->map(function ($user) {
    return [
        'name' => strtoupper($user['name']),
        'age' => $user['age'] + 1,
    ];
});
// Hasil: ['ALICE', 26], ['BOB', 31]

5. each($callback)
📌 Melakukan loop pada Collection seperti foreach(), tetapi tetap Collection.
$users = collect(['Alice', 'Bob', 'Charlie']);

$users->each(function ($user) {
    echo "Hello, $user!";
});
// Output: "Hello, Alice!", "Hello, Bob!", "Hello, Charlie!"

6. groupBy($column)
📌 Mengelompokkan Collection berdasarkan nilai tertentu.
$users = collect([
    ['name' => 'Alice', 'role' => 'admin'],
    ['name' => 'Bob', 'role' => 'editor'],
    ['name' => 'Charlie', 'role' => 'admin'],
]);

$grouped = $users->groupBy('role');
// Hasil: ['admin' => [Alice, Charlie], 'editor' => [Bob]]

7. sortBy($column) & sortByDesc($column)
📌 Mengurutkan Collection berdasarkan kolom tertentu.
$users = collect([
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
    ['name' => 'Charlie', 'age' => 22],
]);

$sorted = $users->sortBy('age');
// Hasil: Charlie (22), Alice (25), Bob (30)

$sortedDesc = $users->sortByDesc('age');
// Hasil: Bob (30), Alice (25), Charlie (22)

8. sum($column)
📌 Menjumlahkan nilai dalam Collection berdasarkan kolom tertentu.
$users = collect([
    ['name' => 'Alice', 'salary' => 5000],
    ['name' => 'Bob', 'salary' => 7000],
]);

$totalSalary = $users->sum('salary');
// Hasil: 12000

9. count()
📌 Menghitung jumlah elemen dalam Collection.
$users = collect(['Alice', 'Bob', 'Charlie']);

$count = $users->count();
// Hasil: 3

10. first() & last()
$users = collect(['Alice', 'Bob', 'Charlie']);

$first = $users->first(); // Alice
$last = $users->last();   // Charlie


11. where($column, $value)
📌 Menyaring Collection berdasarkan nilai tertentu seperti WHERE di SQL.
$users = collect([
    ['name' => 'Alice', 'role' => 'admin'],
    ['name' => 'Bob', 'role' => 'editor'],
    ['name' => 'Charlie', 'role' => 'admin'],
]);

$admins = $users->where('role', 'admin');
// Hasil: Alice dan Charlie

12. unique($column)
📌 Menghapus duplikasi dalam Collection berdasarkan kolom tertentu.
$users = collect([
    ['name' => 'Alice', 'role' => 'admin'],
    ['name' => 'Bob', 'role' => 'editor'],
    ['name' => 'Alice', 'role' => 'admin'],
]);

$uniqueUsers = $users->unique('name');
// Hasil: Alice & Bob saja, karena Alice duplikat

13. toArray() & toJson()
📌 Mengonversi Collection ke array atau JSON.
$users = collect([
    ['name' => 'Alice', 'age' => 25],
    ['name' => 'Bob', 'age' => 30],
]);

$array = $users->toArray();
$json = $users->toJson();