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Re^2: sub that sets $_

by holli (Monsignor)
on Jun 28, 2005 at 12:29 UTC ( #470599=note: print w/replies, xml ) Need Help??


in reply to Re: sub that sets $_
in thread sub that sets $_

Thanks Damian for telling me about that possibility. I have taken your advice and updated Re: Handling A File In Human-Compatible Chunks with a new version of the module, that now supports $_.

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Re^3: sub that sets $_
by Animator (Hermit) on Jun 28, 2005 at 12:54 UTC

    First of all congratulations with the excelent idea to use DESTROY to set $_.

    Second, it still has a little bug though... it will set the value of $_ when the object gets destroyed... which is why it works and why it is bugged. Example:

    $_ = "abc"; { my $line = $reader->chunk(); } print $_;
    $_ won't have the value "abc"...

    Update: since I'm not that familiar with overloading I re-looked at the overload pod... (to see if there is a function that is always called, so that the DESTROY could be made conditional/optional). In it I found an intresting overload option.

    You can overload <>. This would mean that you can overload it in your main module and use <$reader>. Which will set the appropriate variable. (Using < $reader->chunk > is not possible since it is a syntax error. You could ofcourse assign it to a temp var and use that but what would be wrong with using <$reader>?)

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