[MacPerl] Regular Expression Problem... (5.005 related)

["Andrew O. Mellinger" <andrew@criticalpath.com>]

>At 8:58 -0700 2000.09.08, Andrew O. Mellinger wrote:
>  >Does anyone have any info on when the 5.005 update will be released?
>
>For MacPerl?  Never.  MacPerl 5.6 is in development.

   Hmm.  Okay, I've got a script that does

   $value =~ s+(?<!<)(http://[\S]*)+<a href=\"$1\">$1</a>+g;

   but it doesn't compile under 5.004 it gets a:

   Sequence (?<...) not recognized.

   I was told that the "It's zero-width look-behind sequence."   I 
seem to be having trouble finding info in my Regular Expressions book 
or Perl books.  What does this mean?

-Andrew

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