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Function: findLastConcur()

Returns a concur iterable containing the last value of concurIterable for which fn returns a value awaitable to a truthy value. Otherwise, returns an empty concur iterable.

Example​

import { asConcur, findLastConcur, orConcur, pipe } from 'lfi'

const API_URL = `https://api.dictionaryapi.dev/api/v2/entries/en`
const getPartsOfSpeech = async word => {
  const response = await fetch(`${API_URL}/${word}`)
  const [{ meanings }] = await response.json()
  return meanings.map(meaning => meaning.partOfSpeech)
}

console.log(
  await pipe(
    asConcur([`sloth`, `lazy`, `sleep`]),
    findLastConcur(async word => (await getPartsOfSpeech(word)).includes(`verb`)),
    orConcur(() => `not found!`),
  ),
)
// NOTE: This word may change between runs
//=> sleep

console.log(
  await pipe(
    asConcur([`sloth`, `lazy`, `sleep`]),
    findLastConcur(async word => (await getPartsOfSpeech(word)).includes(`adverb`)),
    orConcur(() => `not found!`),
  ),
)
//=> not found!
Playground

Since​

v0.0.2

Call Signature​

findLastConcur<Value>(fn): (concurIterable) => ConcurOptional<Value>

Type Parameters​

• Value

Parameters​

fn​

(value) => unknown

Returns​

Function

Parameters​

concurIterable​

ConcurIterable<Value>

Returns​

ConcurOptional<Value>

Defined in​

filters.d.ts:877

Call Signature​

findLastConcur<Value>(fn, concurIterable): ConcurOptional<Value>

Type Parameters​

• Value

Parameters​

fn​

(value) => unknown

concurIterable​

ConcurIterable<Value>

Returns​

ConcurOptional<Value>

Defined in​

filters.d.ts:877