On Mon, 2005-03-07 at 10:57, David wrote:
> > - A rather nasty problem I sometimes pose is to print the answer
> > to:
> > $> perl -e '$x=1; $y=$x+++1; print "x=$x, y=$y\n"'
> ...
> > [Correct answer: x=2, y=2]
>
> I'd posit that the correct answer is: "rewrite it."
>
> And adding a space between $x++ and +1 is nowhere near enough.
Why not?
$y = $x++ + 1;
is quite readable, and very clear in its intent if you know know what
"postfix:++" and "infix:+" do (and you'd better). You don't even have to
know precedence, as it is implied by the (now correct) use of
whitespace.
Granted, if I ever saw:
$x+++1
in someone's code, I would assume that they were the kind of knucklehead
who sacrifices clarity for (their idea of) coolness. But, that doesn't,
IMHO, taint the combination of ++ and +, just the improper use of
whitespace.
This is also not a Perl-specific issue:
python
>>> x = 1
>>> y = x+++1
>>> print y
2
Personally, I think the Python way of doing things demands that that be
invalid, but I'm not enough of a Python head to be sure.
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