modern-javascript-patterns

النتيجة المتوقعة:

Nested object destructuring allows you to extract values from deeply nested objects:

```javascript
const user = {
id: 1,
name: 'Alice',
address: {
city: 'Boston',
country: 'USA'
}
};

// Nested destructuring
const {
name,
address: { city, country }
} = user;

console.log(city); // 'Boston'
console.log(country); // 'USA'

// With default values
const {
address: {
city = 'Unknown',
zipCode = '00000'
} = {}
} = user;
```

النتيجة المتوقعة:

Promise.all fails fast - if any promise rejects, the entire operation fails. Promise.allSettled waits for all promises to settle regardless of outcome:

```javascript
// Promise.all - fails on first rejection
const users = await Promise.all([
fetchUser(1),
fetchUser(2)
]); // Throws if either fails

// Promise.allSettled - waits for all
const results = await Promise.allSettled([
fetchUser(1),
fetchUser(2)
]);

results.forEach(result => {
if (result.status === 'fulfilled') {
console.log('Success:', result.value);
} else {
console.log('Failed:', result.reason);
}
});
```