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Re: Perl Programming guidlines/rules

by Abigail-II (Bishop)
on Nov 21, 2002 at 18:14 UTC ( #214848=note: print w/replies, xml ) Need Help??

in reply to Re: Re: Perl Programming guidlines/rules
in thread Perl Programming guidelines/rules

Well, I would make coding standards for good programmers, and from a good programmer, I would assume he/she knows the language. Non-perl programmers shouldn't program Perl. And as a manager, or tech-lead, I wouldn't allow non-Perl programmers to touch Perl code.

Perhaps rule 0 should be: "People who can't program in Perl are not allowed to touch the code".

$_ is one of the most basic things in Perl. If you have problems with the readability of $_, you shouldn't call yourself a Perl programmer.


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Re: Re: Perl Programming guidlines/rules
by BUU (Prior) on Nov 21, 2002 at 23:48 UTC
    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.
      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/; }


        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.

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