Filter promises concurrently
Useful when you need to run promise-returning & async functions multiple times with different inputs concurrently and get a filtered down result.
$ npm install p-filter
import pFilter from 'p-filter';
import getWeather from 'get-weather'; // Not a real module
const places = [
getCapital('Norway').then(info => info.name),
'Bangkok, Thailand',
'Berlin, Germany',
'Tokyo, Japan',
];
const filterer = async place => {
const weather = await getWeather(place);
return weather.temperature > 30;
};
const result = await pFilter(places, filterer);
console.log(result);
//=> ['Bangkok, Thailand']
Returns a Promise
that is fulfilled when all promises in input
and ones returned from filterer
are fulfilled, or rejects if any of the promises reject. The fulfilled value is an Array
of the fulfilled values returned from filterer
in input
order.
Type: Iterable<Promise|any>
Iterated over concurrently in the filterer
function.
Type: Function
The filterer function that decides whether an element should be included into result. Expected to return boolean | Promise<boolean>
.
Type: object
concurrency
Type: number
Default: Infinity
Minimum: 1
The number of concurrently pending promises returned by filterer
.
Author: Sindresorhus
Source Code: https://github.com/sindresorhus/p-filter
License: MIT license