it-vecherka/jnoid — pull request #24 by dmitriy-kiriyenko (2013-11-20 15:28:55+00:00)
Title: Tap and activate

`tap` works like `map`, but keeps stream values.
`activate` triggers event listening by adding one more listener. That listener can only be unsubscribed from inside - by returning `Reply.stop`. Default function for that listener is `nop`, which obviously never unsubscribes.