English binary logic operators
brunodomedeiros+spam at com.gmail
Tue Nov 14 08:02:51 PST 2006
Sean Kelly wrote:
> Bill Baxter wrote:
>> Bill Baxter wrote:
>>> David Qualls wrote:
>>> After 20 years of C/C++ my use of && and || was pretty instinctual,
>>> but after just a few months of working with Python on the side I
>>> found I started typing 'and' and 'or' without thinking about it.
>> I think my meaning wasn't so clear so let me rephrase.
>> It took no time to get used to 'and/or' when learning python. I don't
>> recall ever mistakenly using '&&' in my first few python attempts.
>> But what happened after a few months (and continues to today) is that
>> I sometimes type 'and/or' in *C++* code (and now *D* too) when I mean
>> I think it's just because in my head I'm *thinking* 'if this and that'
>> as I type. My brain recognizes 'and' as a legal keyword from
>> somewhere and so my fingers type it.
>> Unfortunately, if && and || are to be eliminated wholesale, the
>> benefit will be seen as too small to be worth the pain of fixing all
>> old code. Furthermore Walter believes that C/C++ syntax must be good
>> enough or it wouldn't have survived so long (or something like that).
>> And he believes that D should look and behave like C/C++ as much as
>> possible to ease the transition for C/C++ refugees (hence the decision
>> to not fix how switch works). He also believes that symbols
>> (!@#$%^&*) should be used wherever possible instead of new keywords
>> (hence we have ':' showing up everywhere for all kinds of different
>> purposes, and "static" with even more meanings than in C++).
>> It could be possible to add 'and' and 'or' as _synonyms_, but that
>> smacks as too many ways to do the same thing, and adds two keywords
>> for something for which there is already another way to do it. It
>> doesn't let you do or express anything you couldn't before.
> For what it's worth, 'and' and 'or' as synonyms for '&&' and '||'
> already exists in C/C++. Trigraphs are a largely unknown feature that
> many appear to dislike, but I have read a reasonable argument that they
> are useful for teaching new programmers.
What do C trigraphs have to do with 'and' and 'or' as synonyms for '&&'
Bruno Medeiros - MSc in CS/E student
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