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Re^4: will you explain what's going on?

by maard (Pilgrim)
on Oct 27, 2004 at 10:29 UTC ( [id://402945]=note: print w/replies, xml ) Need Help??


in reply to Re^3: will you explain what's going on?
in thread will you explain what's going on?

Oh, thank you very much!++
Now everything is on it's place.
Final question: how can one find out the answer to the question like this one? Looking through perl source code? Because I'd like to find the answer myself but sometimes stuck into not knowing even where to look into...

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Re^5: will you explain what's going on?
by ysth (Canon) on Oct 27, 2004 at 12:06 UTC
    Since this effect depends on how a lot of different pieces work, you won't find it easily in the source code. But the last paragraph of the section of perlsyn on statement modifiers says (beginning in 5.8.1, anyway):
    NOTE: The behaviour of a my statement modified with a statement modifier conditional or loop construct (e.g. my $x if ...) is undefined. The value of the my variable may be undef, any previously assigned value, or possibly anything else. Don't rely on it. Future versions of perl might do something different from the version of perl you try it out on. Here be dragons.

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