When I run (go (while true (prn (<! channel)))shouldn't it stop, when the channel is empty? In my case its repeats printing nil until i kill the process. I use core.async under cljs.

@danielgrosse You need to make the loop condition depend on whether the channel is closed (i.e. whether a take returned nil)

Like (go (while (not (nil?)) (foo)))?

Yeah but while is not a good fit here, better go with loop/`recur`

Like (go (loop [] (when-some [x (<! channel)] (prn x) (recur)))), for example

Or use the go-loop shorthand if you like

With while you couldn't use the value read from the channel in case it isn't yet closed and exhausted

Thank you, when-some was the clue.

YW!

@danielgrosse I use this

(defmacro while-let
  [test-binding & body]
  `(loop []
     (when-let ~test-binding
       ~@body
       (recur))))

for exactly that sort of scenario