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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | 9x 9x 9x 16x 35x | import { flatten } from './flatten';
import { purry } from './purry';
/**
* Map each element of an array using a defined callback function and flatten the mapped result.
* @param array The array to map.
* @param fn The function mapper.
* @signature
* P.flatMap(array, fn)
* @example
* P.flatMap([1, 2, 3], x => [x, x * 10]) // => [1, 10, 2, 20, 3, 30]
* @data_first
* @pipeable
* @category Array
*/
export function flatMap<T, K>(
array: readonly T[],
fn: (input: T) => K | readonly K[]
): K[];
/**
* Map each element of an array using a defined callback function and flatten the mapped result.
* @param array The array to map.
* @param fn The function mapper.
* @signature
* P.flatMap(fn)(array)
* @example
* P.pipe([1, 2, 3], P.flatMap(x => [x, x * 10])) // => [1, 10, 2, 20, 3, 30]
* @data_last
* @pipeable
* @category Array
*/
export function flatMap<T, K>(
fn: (input: T) => K | K[]
): (array: readonly T[]) => readonly K[];
export function flatMap() {
return purry(_flatMap, arguments);
}
function _flatMap<T, K>(
array: readonly T[],
fn: (input: T, index: number, arr: readonly T[]) => K[]
): readonly K[] {
return flatten(array.map((item, index, array) => fn(item, index, array)));
}
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