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Re (tilly) 2: using 'my'

by tilly (Archbishop)
on Jun 21, 2001 at 21:39 UTC ( #90471=note: print w/ replies, xml ) Need Help??


in reply to Re: using 'my'
in thread using 'my'

Actually there are a number of truly global variables in Perl. For instance no matter what package you are in, $ENV, $^W, $_, etc are always the same.


Comment on Re (tilly) 2: using 'my'
Re: Re (tilly) 2: using 'my'
by sierrathedog04 (Hermit) on Jun 22, 2001 at 02:07 UTC
    You are correct. Camel III's glossary says:
    In Perl, only certain special variables are truly global—most variables (and all subroutines) exist only in the current package.
Re: Re (tilly) 2: using 'my'
by chip (Curate) on Jun 23, 2001 at 01:14 UTC
    FWIW, those truly global variables are really all in the main package. The language parser acts as if those global variable names were prefixed with main:: if no package is specified, no matter what package directive is in scope at the time.

        -- Chip Salzenberg, Free-Floating Agent of Chaos

      I know that. An amusing side-effect is that if someone mistakenly tries to throw an our on, say, $_ and they are in any package other than main::, it will not work as they expect.

      This might be considered a bug.

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