How about while?

(while not-finished
  (do stuff ...))

On Wed, Sep 28, 2011 at 4:23 AM, Nathan Sorenson <n...@sfu.ca> wrote:

> Quite often I convince myself I need state or some effectful trigger, but
> further thought reveals a simpler stateless approach.
>
> That being said--if you absolutely need to be doing something based on
> effects, something that absolutely can't be tracked via values in a purely
> functional way--like polling a queue once per second (functional-reactive
> programming notwithstanding), I personally prefer straight loop/recur to the
> list processing functions. In my mind, usings seq/filter/map suggests you
> are doing something lazy, referentially transparent, and composable. If you
> are not doing that, a loop recur signals to me you are manipulating the
> execution flow in a precise way.
>
> But again, I always try to find a way to avoid dealing with the messy
> stateful world until the last possible moment. Lots of application logic can
> be completely pure with one small "write to file"-type operation at the end.
>
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