Node.js - Using the async lib - async.foreach with object

Question

Node.js - Using the async lib - async.foreach with object

I am using the node async lib - https://github.com/caolan/async#forEach and would like to iterate through an object and print out its index key. Once complete I would like execute a callback.

Here is what I have so far but the 'iterating done' is never seen:

    async.forEach(Object.keys(dataObj), function (err, callback){ 
        console.log('*****');

    }, function() {
        console.log('iterating done');
    });

Why does the final function not get called?
How can I print the object index key?

node.js
loops
object
asynchronous
node-async

Answer 1

The final function does not get called because you don't call the callback inside the iterator function to tell async that this iterator has completed.

Use something like this:

async.forEach(Object.keys(dataObj), function (item, callback){ 
    console.log(item); // print the key
    callback(); // tell async that the iterator has completed

}, function(err) {
    console.log('iterating done');
});