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run-parallel

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run-parallel

Run an array of functions in parallel

    1.2.0latest

Version published
Maintainers
1
Weekly downloads
22,783,314
decreased by-2.37%

Weekly downloads

Readme

Source

run-parallel travis npm downloads javascript style guide

Run an array of functions in parallel

parallel Sauce Test Status

install

npm install run-parallel

usage

parallel(tasks, [callback])

Run the tasks array of functions in parallel, without waiting until the previous function has completed. If any of the functions pass an error to its callback, the main callback is immediately called with the value of the error. Once the tasks have completed, the results are passed to the final callback as an array.

It is also possible to use an object instead of an array. Each property will be run as a function and the results will be passed to the final callback as an object instead of an array. This can be a more readable way of handling the results.

arguments
  • tasks - An array or object containing functions to run. Each function is passed a callback(err, result) which it must call on completion with an error err (which can be null) and an optional result value.
  • callback(err, results) - An optional callback to run once all the functions have completed. This function gets a results array (or object) containing all the result arguments passed to the task callbacks.
example
var parallel = require('run-parallel') parallel([ function (callback) { setTimeout(function () { callback(null, 'one') }, 200) }, function (callback) { setTimeout(function () { callback(null, 'two') }, 100) } ], // optional callback function (err, results) { // the results array will equal ['one','two'] even though // the second function had a shorter timeout. })

This module is basically equavalent to async.parallel, but it's handy to just have the one function you need instead of the kitchen sink. Modularity! Especially handy if you're serving to the browser and need to reduce your javascript bundle size.

Works great in the browser with browserify!

see also

license

MIT. Copyright (c) Feross Aboukhadijeh.

Keywords

FAQs

What is run-parallel?

Run an array of functions in parallel

Is run-parallel popular?

The npm package run-parallel receives a total of 18,576,523 weekly downloads. As such, run-parallel popularity was classified as popular.

Is run-parallel well maintained?

We found that run-parallel demonstrated a not healthy version release cadence and project activity because the last version was released a year ago.It has 1 open source maintainer collaborating on the project.

Last updated on 10 Feb 2021
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