support for async callback about bacon.js HOT 5 CLOSED

You'll need to wrap your async callback as Bacon EventStream and then you can use flatMap to achieve this. FlatMap maps an event to a EventStream and merges the created streams to result stream.

$(".ss").asEventStream("click").flatMap(function(e) {
  return Bacon.later(1000, 5000);
});

There isn't a direct method to wrap callbacks, but if you're dealing with AJAX, Bacon.fromPromise can be used. If nothing else, you can always use a Bus.

stream.flatMap(function(e) {
  var bus = new Bacon.Bus()
  setTimeout(function() {
    bus.push(5000);
    bus.end()
  },1000);
  return bus;
});

from bacon.js.

@lautis thanks! Nice solution.

An even simpler solution to this particular problem would be

$(".ss").asEventStream("click").map(5000).delay(1000)

The flatMap solution is more flexible though. (Have a look at the implementation to delay to find out it actually just wraps your solution)

Would it make sense to include an easy callback wrapper API? If it existed, how would you like your client code to look like?

from bacon.js.

In fact, there is Bacon.fromCallback().

$(".ss").asEventStream("click").flatMap(function(v) {
  return Bacon.fromCallback(function(callback) {
    setTimeout(function() {
      callback(5000)
    }, 1000)
  })
})

Looks clumsy, of course, compared to the specific solution using delay.

from bacon.js.

Oh, cool. That's what I imagined the API for fromCallback to be. It's handy if you need to wrap a third party library to a Bacon stream (e.g. Zepto.js AJAX, which doesn't use promises).

from bacon.js.

thanks it really work like i want

from bacon.js.