use $/=undef to slurp all the file into a string. Replace all \n with commas except for the 12th? 

$/=undef;    # Slurps all data in file.
$_=<DATA>;    # Put it in $_, convenient for regex.
my $lines=0;    # Line count $. might suffice and then the pre increme
+nt can be dropped.
my $records=11;    # Number of lines in a record.
s/\n/(',',"\n")[++$line%$records==0]/eg;# replaces all \n with commas 
+except the recordth.
print $_;

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--

Brother Frankus.

¤

In reply to Re: Parsing multi-line records by frankus
in thread Parsing multi-line records by chuntoon

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