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Variable: mapAsync()

const mapAsync: {<From, To>(fn): (asyncIterable) => AsyncIterable<To>; <From, To>(fn, asyncIterable): AsyncIterable<To>; <From, To>(fn): (asyncIterable) => AsyncIterable<To>; <From, To>(fn, asyncIterable): AsyncIterable<To>; }

Defined in: transforms.d.ts:71

Returns an async iterable containing the values of asyncIterable transformed by fn in iteration order.

Like Array.prototype.map, but for async iterables.

Call Signature​

<From, To>(fn): (asyncIterable) => AsyncIterable<To>

Type Parameters​

From​

From

To​

To extends unknown[] | []

Parameters​

fn​

(value) => MaybePromiseLike<To>

Returns​

(asyncIterable): AsyncIterable<To>

Parameters​

asyncIterable​

AsyncIterable<From>

Returns​

AsyncIterable<To>

Call Signature​

<From, To>(fn, asyncIterable): AsyncIterable<To>

Type Parameters​

From​

From

To​

To extends unknown[] | []

Parameters​

fn​

(value) => MaybePromiseLike<To>

asyncIterable​

AsyncIterable<From>

Returns​

AsyncIterable<To>

Call Signature​

<From, To>(fn): (asyncIterable) => AsyncIterable<To>

Type Parameters​

From​

From

To​

To

Parameters​

fn​

(value) => MaybePromiseLike<To>

Returns​

(asyncIterable): AsyncIterable<To>

Parameters​

asyncIterable​

AsyncIterable<From>

Returns​

AsyncIterable<To>

Call Signature​

<From, To>(fn, asyncIterable): AsyncIterable<To>

Type Parameters​

From​

From

To​

To

Parameters​

fn​

(value) => MaybePromiseLike<To>

asyncIterable​

AsyncIterable<From>

Returns​

AsyncIterable<To>

Example​

import { asAsync, mapAsync, pipe, reduceAsync, toArray } from 'lfi'

const API_URL = `https://api.dictionaryapi.dev/api/v2/entries/en`

console.log(
  await pipe(
    asAsync([`sloth`, `lazy`, `sleep`]),
    mapAsync(async word => {
      const response = await fetch(`${API_URL}/${word}`)
      return (await response.json())[0].phonetic
    }),
    reduceAsync(toArray()),
  ),
)
//=> [ '/slɑθ/', '/ˈleɪzi/', '/sliːp/' ]
Playground

Since​

v0.0.1