On Sunday 10 October 2010 03:09:21 Ron Bergin wrote:
> On Oct 7, 3:07 pm, shlo...@iglu.org.il (Shlomi Fish) wrote:
> > Hi all,
> >
> > after being tired of telling Perl newcomers about the same problems with
> > their code times and times again, I've decided to create this page
> > detailing "Perl Elements to avoid":
> >
> > http://perl-begin.org/tutorials/bad-elements/
>
> [quote]
> C-style for loops
>
> Some beginners to Perl tend to use C-style-for-loops to loop over an
> array's elements:
> [/quote]
>
> Have you considered including an example were it would be appropriate
> to use the C-style for loop, such as when the iterator needs to change
> by some value other than 1?
Well, in this case, PBP recommends to use a while/continue loop:
[code]
for (my $i = 0; $i < $n ; $i += 2)
{
print "$i\n";
}
[/code]
into:
[code]
{
my $i = 0;
while ($i < $n)
{
print "$i\n";
}
continue
{
$i += 2;
}
}
[/code]
But it's a good idea to show both versions. Thanks!
Regards,
Shlomi Fish
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