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Re: NEVER do this. Ever. Not even once.

by bikeNomad (Priest)
on Jul 30, 2001 at 20:59 UTC ( #100901=note: print w/replies, xml ) Need Help??

in reply to NEVER do this. Ever. Not even once.
in thread Variable Scope

Interesting suggestion. What's wrong with this usage (which I find myself using frequently)? :
use strict; package MyClass; @MyClass::ISA = 'Whatever';

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Re: Re: NEVER do this. Ever. Not even once.
by dragonchild (Archbishop) on Jul 31, 2001 at 16:29 UTC
    Nothing's intrinsically wrong with it, so far as that goes. However, what ends up happening is that you have a global variable in one place. This could lead to a slippery slope. I'm not saying that someone of your experience will do so, but it could very well happen.

    Instead of that syntax, I would recommend one of the following:

    package MyClass; @ISA = qw(Whatever); use strict; ----- use strict; use vars '@ISA'; package MyClass; @ISA = qw(Whatever); ----- use strict; use 5.6.0; package MyClass; our @ISA = qw(Whatever);
    The first two still use globals, and are for pre-5.6.0 or before. If you require that 5.6.0 or higher be used, there's absolutely not reason not to use our. None.

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