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: "Sadio Mané",
number: 10
},
{
name: "Mohamed Salah",
number: 11
}
]);
const flatMapped = collection.flatMap(value => value.name.toUpperCase());
flatMapped.all();
//=> ['SADIO MANÉ', 'MOHAMED SALAH']