Feature request: Please add more "Control Flow" utilities

[boustanihani]

Could you possibly add more "Control Flow" utilities like the ones provided by Async.js:

https://caolan.github.io/async/v3/docs.html#controlflow

Control Flow:

• applyEach
• applyEachSeries
• auto
• autoInject
• cargo
• cargoQueue
• compose
• doUntil
• doWhilst
• forever
• parallel
• parallelLimit
• priorityQueue
• queue
• race
• retry
• retryable
• seq
• series
• times
• timesLimit
• timesSeries
• tryEach
• until
• waterfall
• whilst

[SandipGyawali]

#476

[boustanihani]

Some "Control Flow" utilities like the queue for example are more complex to implement.
The queue could always be reused, so tasks can always be added, even when the queue is running.
And we can also attach two callback functions, drain & error. Here is an example how Async solves this:
https://caolan.github.io/async/v3/docs.html#queue

// create a queue object with concurrency 2
var q = async.queue(function(task, callback) {
    console.log('hello ' + task.name);
    callback();
}, 2);

// assign a callback
q.drain(function() {
    console.log('all items have been processed');
});
// or await the end
await q.drain()

// assign an error callback
q.error(function(err, task) {
    console.error('task experienced an error');
});

// add some items to the queue
q.push({name: 'foo'}, function(err) {
    console.log('finished processing foo');
});
// callback is optional
q.push({name: 'bar'});

// add some items to the queue (batch-wise)
q.push([{name: 'baz'},{name: 'bay'},{name: 'bax'}], function(err) {
    console.log('finished processing item');
});

// add some items to the front of the queue
q.unshift({name: 'bar'}, function (err) {
    console.log('finished processing bar');
});

I wish we could get similar functionality with radashi :)

[SandipGyawali]

I'll add it, just give me some time.