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Function: uniqueAsync()

uniqueAsync<Value>(asyncIterable): AsyncIterable<Value, any, any>

Returns an async iterable containing the values of asyncIterable in iteration order, except values are deduplicated if they are equal using Object.is.

Type Parameters​

• Value

Parameters​

asyncIterable​

AsyncIterable<Value, any, any>

Returns​

AsyncIterable<Value, any, any>

Example​

import { asAsync, flatMapAsync, map, pipe, reduceAsync, toArray, uniqueAsync } from 'lfi'

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

console.log(
  await pipe(
    asAsync([`sloth`, `lazy`, `sleep`]),
    flatMapAsync(async word => {
      const response = await fetch(`${API_URL}/${word}`)
      const [{ meanings }] = await response.json()
      return map(meaning => meaning.partOfSpeech, meanings)
    }),
    uniqueAsync,
    reduceAsync(toArray()),
  ),
)
//=> [ 'noun', 'verb', 'adjective' ]
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Since​

v0.0.2

Defined in​

filters.d.ts:576