Function flatMapDeep

Alias

flatMapDeep<T, U>(arr, iteratee): ExtractNestedArrayType<U>[]
Recursively maps each element in an array using a provided iteratee function and then deeply flattens the resulting array.
Type Parameters
- T
  The type of elements within the array.
- U
  The type of elements within the returned array from the iteratee function.
Parameters
- arr: readonly T[]
  The array to flatten.
- iteratee: ((item: T) => U)
  The function that produces the new array elements.
  - - (item): U
    - Parameters
      item: T
      Returns U
Returns ExtractNestedArrayType<U>[]
A new array that has been flattened.
Example
```
const result = flatMapDeep([1, 2, 3], n => [[n, n]]);
// [1, 1, 2, 2, 3, 3]
```
- Defined in src/array.ts:80