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Variable: flattenAsync()

const flattenAsync: <Value>(asyncIterable) => AsyncIterable<Value>

Defined in: transforms.d.ts:380

Returns an async iterable that contains the values of each iterable in asyncIterable in iteration order.

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

Type Parameters​

Value​

Value

Parameters​

asyncIterable​

AsyncIterable<Iterable<Value> | AsyncIterable<Value>>

Returns​

AsyncIterable<Value>

Example​

import { asAsync, flattenAsync, map, 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}`)
      const [{ meanings }] = await response.json()
      return map(meaning => meaning.partOfSpeech, meanings)
    }),
    flattenAsync,
    reduceAsync(toArray()),
  ),
)
//=> [
//=>   'noun',
//=>   'verb',
//=>   'noun',
//=>   'verb',
//=>   'adjective',
//=>   'verb'
//=> ]
Playground

Since​

v0.0.1