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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.
$ npm install --save each-async
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
The array you want to iterate.
A function which is called for each item in the array with the following arguments:
item
: the current item in the arrayindex
: the current indexdone([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.
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
.
MIT © Sindre Sorhus