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Async concurrent iterator (async forEach)
JavaScript
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each-async Build Status

Async concurrent iterator (async forEach)

Like async.each(), but tiny.

I often use async.each() for doing async operations when iterating, but I almost never use the other gadzillion methods in async.

Async iteration is one of the most used async control flow patterns.

Install

$ npm install --save each-async

Usage

var eachAsync = require('each-async');

eachAsync(['foo','bar','baz'], function (item, index, done) {
    console.log(item, index);
    done();
}, function (error) {
    console.log('finished');
});
//=> foo 0
//=> bar 1
//=> baz 2
//=> finished

API

eachAsync(array, callback, finishedCallback)

array

The array you want to iterate.

callback(item, index, done)

A function which is called for each item in the array with the following arguments:

  • item: the current item in the array
  • index: the current index
  • done([error]): call this when you're done with an optional error. Supplying anything other than undefined/null will stop the iteration.

Note that order is not guaranteed since each item is handled concurrently.

finishedCallback(error)

A function which is called when the iteration is finished or on the first error. First argument is the error passed from done() in the callback.

License

MIT © Sindre Sorhus

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