Subscribe to multiple pubs with the same function

[iangilman]

Sometimes I'd like to handle a number of similar topics with the same function. I'm imagining something like this:

amplify.subscribe(["foo", "bar", "baz"], function(data, topic) {
    alert("got a " + topic + " with " + data); 
});

For that matter, a handy feature for debugging and logging would be subscribeAll().

[ifandelse]

amplify.subscribe() can take a space-delimited list of topics currently, and will subscribe the callback for each topic. For example:

amplify.subscribe("foo bar baz", function(data) {
    alert("got some data " + data); 
});

[iangilman]

Perfect! Looks like it's a documentation issue then; thanks for adding the label.

[iangilman]

oh, wait... can you find out which topic you're receiving? Without that, it's a good deal less useful.

[ifandelse]

You probably noticed I revised my reply's code sample, since I, too, thought the callback args included topic - sorry about that. I'm chatting with the appendTo team to see about opening an issue for adding topic to the callback args....

[iangilman]

Awesome, thanks!

[mgiulio]

Yes, maybe the documentation should mention this. My code wasn't working because I assumed that I could use event names with spaces.

[ifandelse]

@mgiulio - I have a pull request pending that will update the documentation once it's merged.

[ifandelse]

@iangilman The pull request I've opened will update the documentation (the amplify.core README) with examples on how you could capture topic inside the subscription callback.

[iangilman]

@ifandelse Excellent!