Squeak-dev Digest, Vol 24, Issue 7
blake at kingdomrpg.com
Thu Dec 2 21:17:50 UTC 2004
On Thu, 2 Dec 2004 14:57:09 -0600, Robert Pratte <csrpp at eiu.edu> wrote:
>> D = C++; //or is it D = ++C; ?
> Actually, the two are not the same. In the first example, you aren't
> setting D to C as you do in the latter, you are instead using the value
> of C. In a simple integer evaluation, it doesn't (always) make a
> difference, but when applying the concept to more complicated
> structures/objects/etc., it can be a problem. (BTW, the ++ operator
> changes the value of C, not just what it would be currently evaluated
> at. That is D = C++; versus D = C + 1; causes C to have a different
> value whereas that of D is the same).
Yeah, I know. It's subtle. I hate subtle. (In programming, anyway.<s>)
> Anyway, one thing that I find really interesting about this conversation
> is that it illustrates the confusion that can arise over syntactical
> conventions and how this confusion can lead to errors, etc. I think
> that this is particularly important given the history of smalltalk and
> its aversion to such complexity. In other words, while implementation
> can devolve into splitting hairs, smalltalk is supposed to be (somewhat)
> intuitive and straightforward to grasp (note that this does not mean
> "simple" in terms of capability). The initial question is important
> because one method seems intuitive to (at least one) programmer, but the
> result may be unexpected. Therefore, why is this method intuitive and
> how do we prevent the language from following grammatical trends that
> would obscure the "best" way of writing something?
Exactly why I brought it up. I've been wondering if there isn't an even
simpler, clearer way to express things.
>> I always fall back on plain code but get more comfortable with the
>> for better (Smalltalk) or worse (C)<s>.
> And when one is changing code, the result may be unexpected. Again,
> there is a certain danger in this process.
> A bit of a ramble - sorry
I appreciate the input.
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