Variable: getConcur()

const getConcur: <Value>(concurIterable) => Promise<Value>

Defined in: optionals.d.ts:282

Returns a promise that resolves to the only value in concurIterable if it contains exactly one value. Otherwise, returns a promise that rejects.

The promise does not necessarily reject if the given concurIterable rejects. Instead this function excludes erroring values when counting the number of values in concurIterable.

Type Parameters

Value

Value

Parameters

concurIterable

ConcurIterable<Value>

Returns

Promise<Value>

Example

import { asConcur, findConcur, getConcur, pipe } from 'lfi'

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

const findWordWithPartOfSpeech = partOfSpeech =>
  pipe(
    asConcur([`sloth`, `lazy`, `sleep`]),
    findConcur(async word => {
      const response = await fetch(`${API_URL}/${word}`)
      const [{ meanings }] = await response.json()
      return meanings.some(meaning => meaning.partOfSpeech === partOfSpeech)
    }),
    getConcur,
  )

console.log(await findWordWithPartOfSpeech(`noun`))
// NOTE: This word may change between runs
//=> sloth
console.log(await findWordWithPartOfSpeech(`verb`))
// NOTE: This word may change between runs
//=> sloth
console.log(await findWordWithPartOfSpeech(`adjective`))
//=> lazy
try {
  console.log(await findWordWithPartOfSpeech(`adverb`))
} catch {
  console.log(`Oh no! It was empty...`)
}
//=> Oh no! It was empty...

Playground

Since

v0.0.2