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Variable: flatMap()

const flatMap: {<From, To>(fn): (iterable) => Iterable<To>; <From, To>(fn, iterable): Iterable<To>; <From, To>(fn): (iterable) => Iterable<To>; <From, To>(fn, iterable): Iterable<To>; }

Defined in: transforms.d.ts:168

Returns an iterable containing the values of the iterables returned from applying fn to each value of iterable in iteration order.

Like Array.prototype.flatMap, but for iterables.

Call Signature​

<From, To>(fn): (iterable) => Iterable<To>

Type Parameters​

From​

From

To​

To extends [] | unknown[]

Parameters​

fn​

(value) => Iterable<To>

Returns​

(iterable): Iterable<To>

Parameters​

iterable​

Iterable<From>

Returns​

Iterable<To>

Call Signature​

<From, To>(fn, iterable): Iterable<To>

Type Parameters​

From​

From

To​

To extends [] | unknown[]

Parameters​

fn​

(value) => Iterable<To>

iterable​

Iterable<From>

Returns​

Iterable<To>

Call Signature​

<From, To>(fn): (iterable) => Iterable<To>

Type Parameters​

From​

From

To​

To

Parameters​

fn​

(value) => Iterable<To>

Returns​

(iterable): Iterable<To>

Parameters​

iterable​

Iterable<From>

Returns​

Iterable<To>

Call Signature​

<From, To>(fn, iterable): Iterable<To>

Type Parameters​

From​

From

To​

To

Parameters​

fn​

(value) => Iterable<To>

iterable​

Iterable<From>

Returns​

Iterable<To>

Example​

import { flatMap, pipe, reduce, toArray } from 'lfi'

console.log(
  pipe(
    [`sloth`, `lazy`, `sleep`],
    flatMap(word => [word, `much ${word}`]),
    reduce(toArray()),
  ),
)
//=> [
//=>   'sloth',
//=>   'much sloth',
//=>   'lazy',
//=>   'much lazy',
//=>   'sleep',
//=>   'much sleep'
//=> ]
Playground

Since​

v0.0.1