The official version of this package is pure ESM, which our build system does not support. See sindresorhus/p-map#44 (comment).
Here we just fork it and to use commonjs.
Ideally we'd convert to ESM, but that's not realistic for us right now, and there are some rough edges we're hoping get sanded off before we do so.
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-filterimport 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<unknown> | unknown>
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
See the p-map options.
Type: number
Default: Infinity
Minimum: 1
The number of concurrently pending promises returned by filterer.
Returns an async iterable that iterates over the promises in iterable and ones returned from filterer concurrently, calling filterer for each element.
import {pFilterIterable} from 'p-filter';
import getWeather from 'get-weather'; // Not a real module
async function * getPlaces() {
const name = await getCapital('Norway');
yield name;
yield 'Bangkok, Thailand';
yield 'Berlin, Germany';
yield 'Tokyo, Japan';
}
const places = getPlaces();
const filterer = async place => {
const weather = await getWeather(place);
return weather.temperature > 30;
};
for await (const element of pFilterIterable(places, filterer)) {
console.log(element);
}
//=> ['Bangkok, Thailand']Type: Iterable<Promise<unknown> | unknown>
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
See the p-map options.
Type: number
Default: Infinity
Minimum: 1
The number of concurrently pending promises returned by filterer.