4.17.11
3.10.1
2.4.2
1.3.1

_.flatMap(collection, [iteratee=_.identity])

sourcenpm package

Creates a flattened array of values by running each element in collection thru iteratee and flattening the mapped results. The iteratee is invoked with three arguments: (value, index|key, collection).

Since

4.0.0

Arguments

argument
collection
[iteratee=_.identity]
type
(Array|Object)
Function
description
The collection to iterate over.
The function invoked per iteration.

Returns

(array)

Example

function duplicate(n) {
  return [n, n];
}

_.flatMap([1, 2], duplicate);
// => [1, 1, 2, 2]

function duplicate(n) {
  return [n, n];
}

_.flatMap([1, 2], duplicate);
// => [1, 1, 2, 2]