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Co-Authored-By: Claude <noreply@anthropic.com>
2025-11-24 09:41:48 +00:00

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flatMap()

The flatMap method iterates through the collection and passes each value to the given callback. The callback is free to modify the item and return it, thus forming a new collection of modified items. Then, the array is flattened by a level:

const collection = collect([
  {
    name: 'Darwin Núñez',
    number: 27,
  },
  {
    name: 'Mohamed Salah',
    number: 11,
  },
]);

const flatMapped = collection.flatMap(value => value.name.toUpperCase());

flatMapped.all();

// ['DARWIN NÚÑEZ', 'MOHAMED SALAH']

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