helper functions, maybe based on Q.js?

[coryroloff]

Hi again!

I'm not sure if you've used this before, but there's a really great Node.js library based on promises and I was thinking it would be cool to see some of them in Cocoa.

https://github.com/kriskowal/q

I think the big ones that would stand out are:

• Q.all - returns a promise that doesn't resolve until all promises in the array have resolved
• Q.spread - alternate to "then" for when you have an array as a resolved value (i.e., multiple values)
• Callback wrappers. This might be tough to implement as there's not a standard convention in Cocoa for callbacks, but would still be handy. For an example, I've been working with the Spotify framework (libspotify), which is all based on callbacks. It would be so much easier to work with if we had something like Q.nfcall() in Cocoa!

Just wanted to share some ideas. Love the framework you've started (especially your use of blocks!)!

[KptainO]

Some of those functionalities would indeed be useful. Some suggestions though:

• I feel like spread should be more implemented like a boolean method which would allow to spread (or not) arguments on the success method. This way user is always using the same method to implement its success callback. What do you think about that ?
• Callback wrappers is something that should definitely be added to Rebelle to ease promise creation. But I don't see anyway to do smthg as short as Q.nfcall. I think we'll have to go with something a little heavier to support all Objective-C APIs.

BTW, thanks for your support and suggestions :)