Show HN: Bond – A Swift binding framework

This looks quite cool. Kind of like a lighterweight less invasive ReactiveCocoa. Obviously less powerful but with a lot less complexity and need to make it core to your app.

One thing I've found frustrating with Swift, and that we've had to deal with in libs we've built, is that there is an unavoidable boilerplate of placing an `[unowned self]` at the top of your callbacks (e.g. `map` in the linked framework), or else you introduce a reference cycle.

If you forget this `[unowned self]`, which is very easy to do, everything compiles fine and now you have a subtle memory issue to track down. I wish there was a language construct to allow you to define closures that have every captured variable unowned (or weak) by default.

I would, at the very least, emphasize somewhere in your docs with big bold letters how important it is to add the boilerplate, or users of Bond will definitely get bitten by this.

With all the binding frameworks for iOS I wonder why Apple haven't reinstated native Cocoa bindings that exist on OS X.

This looks really amazing. Probably the most simple implementation of FRP I've ever seen, nonetheless in Swift.

This looks really great - especially the simplicity of all of it - great work!