Package Exports
- p-filter
- p-filter/index
This package does not declare an exports field, so the exports above have been automatically detected and optimized by JSPM instead. If any package subpath is missing, it is recommended to post an issue to the original package (p-filter) to support the "exports" field. If that is not possible, create a JSPM override to customize the exports field for this package.
Readme
p-filter 
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.
Install
$ npm install --save p-filterUsage
const pFilter = require('p-filter');
const getWeather = require('get-weather'); // not a real module
const places = [
getCapital('Norway').then(info => info.name),
'Bangkok, Thailand',
'Berlin, Germany',
'Tokyo, Japan'
];
const filterer = el => getWeather(el).then(place => place.temperature > 30);
pFilter(places, filterer).then(result => {
console.log(result);
//=> [{name: 'Bangkok, Thailand', temperature: 36}]
});API
pFilter(input, filterer, [options])
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.
input
Type: Iterable<Promise|any>
Iterated over concurrently in the filterer function.
filterer(element, index)
Type: Function
Expected to return a boolean or a Promise for a boolean.
options
Type: Object
concurrency
Type: number
Default: Infinity
Number of concurrently pending promises returned by filterer. Minimum 1.
Related
License
MIT © Sindre Sorhus