Async-Array-Utils #

A collection of array-related async utilities.

tl;dr #

• Install by executing npm install @wojtekmaj/async-array-utils or yarn add @wojtekmaj/async-array-utils.
• Import by adding import * as asyncArrayUtils from '@wojtekmaj/async-array-utils'.
• Do stuff with it!

  const asyncMappedArr = await asyncMap([1, 2, 3], async (x) => x * 2);
  

User guide #

General utils #

asyncEvery() #

Tests whether all elements in the array pass the test implemented by the provided asynchronous function. It returns a Boolean value.

Sample usage #

import { asyncEvery } from '@wojtekmaj/async-array-utils';

const largerThanZero = await asyncEvery([1, 2, 3], async (el, index) => el > 0); // true

asyncForEach() #

Executes a provided asynchronous function once for each array element.

Note: For optimization purposes, all iterations are ran concurrently. If you rely on any side effects, consider asyncForEachStrict() instead.

Sample usage #

import { asyncForEach } from '@wojtekmaj/async-array-utils';

await asyncForEach(
  [1, 2, 3],
  async (el) => { console.log(el * 2); }
); // undefined; 3 console.logs

asyncForEachStrict() #

Like asyncForEach(), but runs iterations non-concurrently.

Sample usage #

import { asyncForEachStrict } from '@wojtekmaj/async-array-utils';

const indexes = [];
await asyncForEachStrict(
  [1, 2, 3],
  async (el) => { indexes.push(index); console.log(el * 2); }
); // undefined; 3 console.logs
console.log(indexes); // [0, 1, 2]

asyncMap() #

Creates a new array populated with the results of calling a provided asynchronous function on every element in the calling array.

Note: For optimization purposes, all iterations are ran concurrently. If you rely on any side effects, consider asyncMapStrict() instead.

Sample usage #

import { asyncMap } from '@wojtekmaj/async-array-utils';

const asyncMappedArr = await asyncMap([1, 2, 3], async (el, index) => el * 2); // [2, 4, 6]

asyncMapStrict() #

Like asyncMap(), but runs iterations non-concurrently.

Sample usage #

import { asyncMapStrict } from '@wojtekmaj/async-array-utils';

const indexes = [];
await asyncMapStrict([1, 2, 3], async (el, index) => { indexes.push(index); return el * 2; }); // [2, 4, 6]
console.log(indexes); // [0, 1, 2]

asyncReduce() #

Executes a reducer asynchronous function (that you provide) on each element of the array, resulting in a single output value.

Sample usage #

import { asyncReduce } from '@wojtekmaj/async-array-utils';

const result = await asyncReduce(
  [1, 2, 3],
  async (tmp, cur, idx) => { return tmp + cur },
  0
); // 6

asyncSome() #

Tests whether at least one element in the array pass the test implemented by the provided asynchronous function. It returns a Boolean value.

Note: For optimization purposes, all iterations are ran concurrently. If you rely on any side effects or execution order, consider asyncMapStrict() instead.

Sample usage #

import { asyncSome } from '@wojtekmaj/async-array-utils';

const largerThanZero = await asyncSome([1, 2, 3], async (el, index) => el > 0); // true

asyncSomeStrict() #

Like asyncSome(), but runs iterations non-concurrently.

Sample usage #

import { asyncSomeStrict } from '@wojtekmaj/async-array-utils';

const largerThanZero = await asyncSomeStrict([1, 2, 3], async (el, index) => el > 0); // true

License #

The MIT License.

Author #

Wojciech Maj kontakt@wojtekmaj.pl http://wojtekmaj.pl