[parenscript-devel] Loops that return a value

Boris Smilga boris.smilga at gmail.com
Tue Jan 15 15:29:44 UTC 2013

On Tue, Jan 15, 2013 at 2:17 PM, David Sargeant <david at dsargeant.com> wrote:

> It seems that the looping constructs don't currently return a value.  In
> other words, they don't return an array of the results.  CoffeeScript
> allows for both scenarios, that is, looping for side-effects and looping
> that returns an array of results.  I'm thinking it would be very useful to
> have dotimes*, dolist*, for-in*, etc. that return an array of results.
> Below is an example from coffeescript.org.  Let me know what you think.
> David
> countdown = (num for num in [10..1])
In Common Lisp—and Parenscript—that would be

  (loop for num :from 10 :to 1
    collect num)

Which expands to roughly the same JS code.

 — B. Smilga.
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