http://www.perlmonks.org?node_id=11113970


in reply to Re^4: Substitution with regex and memory consumption
in thread Substitution with regex and memory consumption

As always the devil is in the detail. Consider for example: 
{
    $s = ".....X.....";
    $s =~ s/X/Y/;
    $x = eval q{ "[ $`$& $' ]" };
}

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You can't rely on PL_sawampersand.

Dave.

In Section Seekers of Perl Wisdom