Recursion means writing a sub that calls itself.. Write a parser that parses one vCard, and if it encounters a vCard inside the vCard, calls itself with the start of the new card? Passing out the result as a hashref, which can be added to the hash in the calling function..

Eg: 

sub parsevcard
{
   my ($inputstr, $inputpos) = @_;
   my $currentcard = {};
   # Parse current vCard starting at $inputpos position in $inputstr s
+tring..
   # enter values in $currentcard hashref

   if($inputstr =~ /\GBEGIN:VCARD/)
   {
       # We found another vcard, set $pos to beginnnig of new card, an
+d call ourselves again..
       $currentcard->{AGENT} = parsevcard($inputstr, $pos);
   }
   return $currentcard;
}

[download]
Untested!

C.

In reply to Re: recursive parsing techniques by castaway
in thread recursive parsing techniques by blahblah

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