Re: Re: Perl Programming guidlines/rules

[BUU]

I support using $_, but you should perhaps implement a standard/guideline in the form of 'Localize $_ in all user created subs', as something like the following:

sub foo{my $blah=shift; $_=substr $blah,0,1; /foo/;}

Which looks fairly innocuous in the use of $_ to avoid more temporary vars (It's not an extremely good example, but it serves), but then you do something likemap{foo($_->[0]);$_;} which can return wildly different results then you expected, and lead to many.. interesting.. bugs.

[belden]

Wow, that really localizes $_ ? To me, it looks more like a straight assignment to $_. I would've expected something like:

sub foo { local $_ = shift; /foo/; }

blyman
:wq

[Aristotle]

No, it doesn't localize, and I'm fairly certain that BUU was pointing out that failing to do so is dangerous.

Makeshifts last the longest.

[belden]

Aha, thanks.

blyman