Function flatMap

flatMap<T, U>(xs: readonly T[], fn: (x: T, i: number) => readonly U[]): U[]
Map each element to an array and flatten one level.

Dual API — works data-first or curried for use in pipe.
Type Parameters
- T
- U
Parameters
- xs: readonly T[]
- fn: (x: T, i: number) => readonly U[]
Returns U[]
Example
```
pipe(
    orders,
    Arrays.flatMap((o) => o.items),
  )
```
- Defined in arrays/transform.ts:61
flatMap<T, U>(fn: (x: T, i: number) => readonly U[]): (xs: readonly T[]) => U[]
Map each element to an array and flatten one level.

Dual API — works data-first or curried for use in pipe.
Type Parameters
- T
- U
Parameters
- fn: (x: T, i: number) => readonly U[]
Returns (xs: readonly T[]) => U[]
Example
```
pipe(
    orders,
    Arrays.flatMap((o) => o.items),
  )
```
- Defined in arrays/transform.ts:62