Apa iku destructuring lan apa sing bisa gawe?

Question

Accepted Answer

**Destructuring** mbukak nilai saka array utawa properti saka obyek menyang variabel sing beda-beda ing siji pernyataan sing jelas lan mudah dibaca.

```js
// array destructuring (by position)
const [first, second] = [10, 20];      // first=10, second=20
const [a, , c] = [1, 2, 3];            // skip the middle → a=1, c=3

// object destructuring (by name)
const { name, age } = user;
const { name: userName } = user;        // rename → userName
const { city = "Unknown" } = address;   // default if missing
```

## Pola sing Kuwat

```js
// nested
const { address: { city } } = user;

// rest — grab the leftovers
const { id, ...rest } = obj;

// function parameters with defaults (very common)
function createUser({ name, role = "user" } = {}) { ... }

// swap variables without a temp
[x, y] = [y, x];
```

## Endi sampeyan ndeleng iku terus-terus

```js
// React
const [count, setCount] = useState(0);
function Card({ title, children }) { ... }

// imports, API responses
const { data, error } = await api.get("/users");
```

## Mengapa Iku Penting

Destructuring ngilangi boilerplate (`const name = user.name; const age = user.age;` dadi siji baris), nggawe tanda tangan fungsi cetha dhéwé (sampeyan ndeleng persis prop endi sing digunakake), lan iku idiomatic ing JS modern, React, lan Node.

Fitur default-value lan rest uga nggawe nangani data pilihan/parsial dadi resik.