Re: 8sync tutorial part 1

[Marko Rauhamaa]

Christopher Allan Webber <address@hidden>:

>   http://dustycloud.org/tmp/8sync-tutorial-part1.html
>
> It gets into the basics of the agenda, using delays to keep things
> simple.

Comments:

 * A typo: The text talks about "run-at" but the example has
   "run-delay".

 * I'm guessing "run-delay" is a macro. In my opinion you should use
   macros very sparingly. Here, the only point of the macro seems to be
   to avoid a "lambda". I would prefer:

     (run-delay (lambda (hello-snore)) 1)

   or -- in this particular case --

     (run-delay hello-snore 1)

 * I'm guessing the "run-delay" macro as well as "start-agenda" operate
   on a singleton, global context. I'd advice making that context
   visible and explicit:

     (define 8sync (make-8sync))

     (define (hello-snore)
        ...
        (run-delay 8sync hello-snore 1))

     (start-agenda 8sync (make-agenda ...))

> IO / ports stuff is coming in the next chapter.

That's when things will get interesting. Looking forward to the
installment.

Warning: I actually *like* the callback hell, which you have said you
want to avoid. On the other hand, the first chapter of the tutorial
seems to consist of nothing but callbacks!


Marko