run-parallel
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npm install run-parallel
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.
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.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!
MIT. Copyright (c) Feross Aboukhadijeh.
FAQs
Run an array of functions in parallel
The npm package run-parallel receives a total of 26,188,790 weekly downloads. As such, run-parallel popularity was classified as popular.
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.
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