Hi. Having a standard (go-loop [] (let [v (<! ch)] ...processing the value...)), is it possible to "cancel" body of the loop in a way not unlike cancelling AJAX request in the Web?

as in while ...processing the value....?

yes

not unless you build in an explicit point where you can listen for an external signal (using a cancellation channel)

I should add: "when a new data arrives" (to the channel)

I see. Yes. Launch/dispatch the processing elsewhere using a function that returns a channel with the result value... then use alts! to wait for either that channel or the original input channel

hand-wavey, but that's the general approach

Thanks! I wonder if some standard feature would help me with this. I'll check out alts! func and it's siblings then