unsubscribe and closures about eventbus HOT 2 OPEN

Some ideas for fixing it:

• Have clients pass in an explicit id to Subscribe/Unsubscribe along with the func

  bus.Subscribe("foo", "handler2", handler2)
  bus.Unsubscribe("foo", "handler2")
  

• Subscribe could return a handle that could be used for Unsubscribe

  h1 := bus.Subscribe("foo", handler2)
  bus.Unsubscribe(h1)
  

• Have clients pass in a struct that wraps the function, guaranteeing a unique pointer

  h1 := Handler{ Func: handler1 }
  bus.Subscribe("foo", &h1)
  bus.Unsubscribe("foo", &h1)
  

from eventbus.

I've just hit this bug. As I show in this playground, you can just use plain == to compare reflect.Values containing lambdas and it seems to work correcly.

from eventbus.