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

by bikeNomad (Priest)
on Jul 30, 2001 at 20:59 UTC ( [id://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';

[download]

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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);

    [download]
    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.
[reply]
[d/l]

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