Apa iku Laravel Collections?

Question

Accepted Answer

**Collections** minangka wrapper sing kuat lan fluent mengelilingi array, nyediyakake puluhan metode sing bisa dirantai kanggo gawe data kanthi elegan (`map`, `filter`, `reduce`, `groupBy`, lan sapanunggale). Hasil query Eloquent bali minangka Collections, mula sampeyan nggunaake iku terus-terusan.

## Collections mbungkus array kanthi metode fluent

```php
$collection = collect([1, 2, 3, 4, 5]);

$result = $collection
    ->filter(fn($n) => $n % 2 === 0)     // [2, 4]
    ->map(fn($n) => $n * 10)              // [20, 40]
    ->values();                           // re-index

$collection->sum();        // 15
$collection->avg();         // 3
$collection->max();         // 5
```

Sawijining Collection mbungkus array lan nawakake API fluent sing bisa dirantai — luwih ekspresif tinimbang fungsi array manual, lan bisa dirantai kanggo gawe data pipeline sing resik.

## Hasil Eloquent YAiku Collections

```php
$users = User::all();          // returns a Collection of User models

$users->where('active', true)              // filter
      ->sortBy('name')
      ->map(fn($u) => $u->name)
      ->take(10);

$users->pluck('email');                     // extract one field → a collection of emails
$users->groupBy('role');                    // group by a field → role => [users]
$users->keyBy('id');                         // index by id
```

Amarga Eloquent bali Collections, sampeyan bisa kanthi elegan ngganti-ganti hasil query ing PHP — nanging kanggo dataset gedhe, luwih apik preferring database query tinimbang ngetem kabeh lan saring ing PHP.

## Set metode sing sugih

```text
map, filter, reduce, each          transform/iterate
pluck, keyBy, groupBy, partition   restructure
sum, avg, min, max, count          aggregate
sort, sortBy, reverse, unique      order/dedup
first, last, take, skip, chunk     slice
contains, every, some, where       query
implode, flatten, collapse, merge  combine
```

## Mengapa iki penting

Collections minangka fitur Laravel sing penting lan serbaguna — padha gawe gawe array lan data dadi elegan lan ekspresif, lan amarga **hasil query Eloquent iku Collections**, sampeyan nggunaake iku terus-terusan nalika nangani database data, gawe padha paham penting lan sakagangé.

Nilai inti minangka API fluent sing bisa dirantai: tinimbang array manipulation verbose lan imperatif, Collections ngidini sampeyan ngekspresikan data transformation (saring, map, grouping, agregasi, sorting) minangka chainable metode sing bisa dibaca lan digabung — manfaat produktivitas lan readability gedhe sing gawe Laravel gaya elegan.

Ngerteni set metode sing sugih (`map`/`filter`/`reduce` kanggo transformasi, `pluck`/`groupBy`/`keyBy` kanggo restruktur, agregasi lan metode sorting) ngidini sampeyan gawe proses data kanthi resik lan perlu kanggo gawe karo Eloquent hasil (sing bali Collections sampeyan banjur ngganti).

Ngerteni Collections — API fluent padha, jangkauan metode sing ana, lan yen Eloquent nggunaake padha — minangka dhasar kanggo pengembangan Laravel produktif, amarga manipulasi data iku konstan lan Collections minangka carane Laravel gawe elegan. (Satunggal peringatan praktis penting: kanggo saring/sorting dataset gedhe, preferring gawe karya ing **database query** tinimbang ngetem kabeh rekaman menyang Collection lan proses ing PHP — Collections kanggo manipulasi data ing memori, dudu gantian kanggo query efisien.) Kelancaran karo Collections minangka tanda idiomatic, productive Laravel code.