[plt-scheme] How to insert an element in empty list?

I wish I could mistakenly *use* one for the other as rarely as I  
mistakenly *assign* one to the other.  :)

rac


On Aug 17, 2007, at 9:54 PM, Jos Koot wrote:

> (require mzscheme)
> (set! sin cos)
> set!: cannot mutate module-required variable in: sin
>
> or:
>
> (module top-safe mzscheme (set! sin cos))
> set!: cannot mutate module-required variable in: sin
> Jos Koot
>
> ----- Original Message ----- From: "Majorinc, Kazimir"  
> <kazimir at chem.pmf.hr>
> To: "Jos Koot" <jos.koot at telefonica.net>
> Cc: <jerzy.karczmarczuk at info.unicaen.fr>; <plt- 
> scheme at list.cs.brown.edu>
> Sent: Saturday, August 18, 2007 3:45 AM
> Subject: Re: [plt-scheme] How to insert an element in empty list?
>
>
>> Jos Koot wrote:
>>>> All this, and Matthias pedagogical answer in particular, remind  
>>>> me times
>>>> when I used Fortran; I remember one implementation on a CDC  
>>>> mainframe,
>>>> where the user *could* corrupt numerical constants, for example  
>>>> making that
>>>> a constant 1 (stored in memory, not an assembly-level  
>>>> literal...) became
>>>> equal to 2. What a mess it could produce, you can hardly imagine...
>>> As far as I can remember most FORTRAN (older than Fortran)  
>>> compilers allowed this and many other evils (some decennia ago)
>>> Jos koot
>> Perhaps (set! sin cos) and (set! call/cc "Hello world") are not  
>> that far.
>> Kazimir Majorinc
>>
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