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Full Discussion: Reading the file line by line in Perl
Top Forums Shell Programming and Scripting Reading the file line by line in Perl Post 302589073 by filter on Tuesday 10th of January 2012 05:31:18 PM
Old 01-10-2012
Thank you very much for your reply birei.

The data file contains the header information (example: names of the columns) and the footer contains the number of the data records, filestamp.

I have ran your script ...its avoiding the "out of memory" issue. But while extracting the header information, the good file doesn't include the string "START-OF-FILE" and "START-OF-DATA" ...

Code:
       ## Header.
        if ( $flipflop = ( $line =~ m/\A(?i)START-OF-FILE/ .. $line =~ m/\A(?i)START-OF-DATA/ ) ) {
                next if $flipflop == 1 || $flipflop =~ /E0\Z/;
                printf $good_fh qq[%s\n], $line;
                next;
        }

In the footer the file stamp could be the as it is, but since the number of records have been changes in the good file...I need to count the number of reords (excluding the header information) and the replace it to with the original i.e.

Code:
footer Information:
DATARECORDS=3530288   --> Need to count the number of records in goodfile and put it over here
TIMEFINISHED=Mon Jan  9 19:24:03 EST 2012
END-OF-FILE

If I was using arrays , then I was using the below logic for the above:
Code:
my $footer_len = 4;
my $datarec_line = 1;
do {
 $line = shift @whole;
 push @header, $line;
} while $line !~ /^START-OF-DATA/;

my $n = @goodlines;
$n -= grep {/^# PRODUCT/} @goodlines;
$footer[$datarec_line] =~ s/\d+/$n/;

Could you please advice any similar logic for the header and footer information to be included to the good file .

I would really appreciate your time on this.
 

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NAME

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