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Re: (nearly) readonly globals

by BrowserUk (Pope)
on Jan 19, 2009 at 20:18 UTC ( #737394=note: print w/ replies, xml ) Need Help??


in reply to (nearly) readonly globals

Is there a bug? Are the docs ambiguous?

No. And No. Using local creates a temporary instance of the named variable, and you can do what you like with it.

That WAD (Working As Designed)


Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.


Comment on Re: (nearly) readonly globals
Re^2: (nearly) readonly globals
by haoess (Curate) on Jan 19, 2009 at 20:32 UTC
    Using local creates a temporary instance of the named variable, and you can do what you like with it.

    But this does not apply to all special globals, i.e.:

    % perl -e 'local $1 = 1' Modification of a read-only value attempted at -e line 1. % perl -e 'local $^S = 1' Modification of a read-only value attempted at -e line 1.

    -- Frank

        I don't give up:

        % bleadperl -Mstrict -wE 'for $1 ( 10..13 ) { say $1 }' 10 11 12 13

        And now, these globals loose their magic:

        % bleadperl -Mstrict -wE 'for $1 ( 10..13 ) { $1 =~ /^(\d)/; say $1 }' 10 11 12 13

        -- Frank

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