25 lines
661 B
Markdown
25 lines
661 B
Markdown
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# `flatMap()`
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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:
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```js
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const collection = collect([
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{
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name: 'Darwin Núñez',
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number: 27,
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},
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{
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name: 'Mohamed Salah',
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number: 11,
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},
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]);
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const flatMapped = collection.flatMap(value => value.name.toUpperCase());
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flatMapped.all();
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// ['DARWIN NÚÑEZ', 'MOHAMED SALAH']
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```
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[View source on GitHub](https://github.com/ecrmnn/collect.js/blob/master/src/methods/flatMap.js)
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