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perhaps I've missed something ... John Clements (20 Jan 2000 22:21 UTC)
Re: perhaps I've missed something ... Lars Thomas Hansen (20 Jan 2000 22:38 UTC)
Re: perhaps I've missed something ... Shriram Krishnamurthi (20 Jan 2000 22:52 UTC)
Re: perhaps I've missed something ... Lars Thomas Hansen (20 Jan 2000 23:02 UTC)
Re: perhaps I've missed something ... John Clements (20 Jan 2000 22:58 UTC)
Re: perhaps I've missed something ... Lars Thomas Hansen (20 Jan 2000 23:05 UTC)
Re: perhaps I've missed something ... John Clements (20 Jan 2000 23:12 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (21 Jan 2000 07:38 UTC)
Re: perhaps I've missed something ... Lars Thomas Hansen (20 Jan 2000 22:44 UTC)
Re: perhaps I've missed something ... John Clements (20 Jan 2000 23:09 UTC)
Re: perhaps I've missed something ... Per Bothner (20 Jan 2000 23:01 UTC)
Re: perhaps I've missed something ... Matthias Felleisen (20 Jan 2000 23:18 UTC)
Re: perhaps I've missed something ... Per Bothner (20 Jan 2000 23:55 UTC)
Re: perhaps I've missed something ... Matthias Felleisen (21 Jan 2000 01:04 UTC)
Re: perhaps I've missed something ... Per Bothner (21 Jan 2000 01:49 UTC)
Re: perhaps I've missed something ... Matthias Felleisen (21 Jan 2000 02:40 UTC)
Re: perhaps I've missed something ... thi (21 Jan 2000 09:58 UTC)
Re: perhaps I've missed something ... Per Bothner (21 Jan 2000 18:36 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (22 Jan 2000 10:32 UTC)
Re: perhaps I've missed something ... Per Bothner (23 Jan 2000 20:02 UTC)
Re: perhaps I've missed something ... Shriram Krishnamurthi (23 Jan 2000 20:50 UTC)
Re: perhaps I've missed something ... Per Bothner (23 Jan 2000 21:25 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (24 Jan 2000 07:30 UTC)
Re: perhaps I've missed something ... Michael Livshin (24 Jan 2000 16:55 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (25 Jan 2000 07:43 UTC)
Re: perhaps I've missed something ... Michael Livshin (25 Jan 2000 11:02 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (25 Jan 2000 11:31 UTC)
Re: perhaps I've missed something ... Matthias Felleisen (25 Jan 2000 13:47 UTC)
Re: perhaps I've missed something ... sperber@xxxxxx (24 Jan 2000 07:29 UTC)
Re: perhaps I've missed something ... John Clements (20 Jan 2000 23:59 UTC)
Re: perhaps I've missed something ... Per Bothner (21 Jan 2000 00:18 UTC)
Re: perhaps I've missed something ... Shriram Krishnamurthi (21 Jan 2000 00:03 UTC)
Re: perhaps I've missed something ... Per Bothner (21 Jan 2000 00:37 UTC)
Re: perhaps I've missed something ... Shriram Krishnamurthi (21 Jan 2000 08:39 UTC)

Re: perhaps I've missed something ... Michael Livshin 25 Jan 2000 10:58 UTC

xxxxxx@informatik.uni-tuebingen.de (Michael Sperber [Mr. Preprocessor]) writes:

> me> 1. what I, in my naivete about PL design, take "set!" to be?
>
> me> (set! <name> <value>) translates, in my mind, to: dear Scheme, please
> me> make it so that next time I say <name>, and <name> denotes the same
                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^
> me> thing as now, I get <value>.
      ^^^^^^^^^^^^
>
> But this intuition is wrong

I think you missed the now-underlined part.

> , because SET! has interaction with *place*
> (in the program source code) in addition to interaction with time.
>
> (define x 23)
>
> (let ((x 5))
>   (set! x 17))
>
> x => 23
>
> This is precisely the case students struggle with.

I really begin to wonder about your students...

> Cheers =8-} Mike

--mike

--
Tools that are no good require more skill.