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Full Discussion: Problem in perl program in printing all the entries
Top Forums Shell Programming and Scripting Problem in perl program in printing all the entries Post 302646387 by kaav06 on Friday 25th of May 2012 04:18:45 AM
Old 05-25-2012
Problem in perl program in printing all the entries
Hi all,

I have a perl program where it checks for the presence of a particular line and prints the record if that line is present. But in the output file, all the entries are not being printed even if the entry has that line. The line to be matched is *FIELD* AV. The program which I wrote is given below. I have no idea where I might be wrong. Any suggestions are welcome. Thanks in advance.

Code:
#!/usr/bin/perl
$/="\n\n";
open(DATA,'mutationsonly.txt');
# or die("Could not open mutationsonly file.");
open(MYOUTPUT, ">newmutations.txt");
# or die ("could not open newmutations file.");
my @records= <DATA>;
close(MYOUTPUT);
close(DATA);
foreach my $record (@records)
{
chomp;
my $find=/^\*FIELD\*\sAV$/;
if ($record=~m/ $find /) 
{
print "$record";
}
}

 

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LEARN ABOUT DEBIAN

devel::trace

Trace(3pm)						User Contributed Perl Documentation						Trace(3pm)

NAME

       Devel::Trace - Print out each line before it is executed (like "sh -x")

SYNOPSIS

	 perl -d:Trace program

DESCRIPTION

       If you run your program with "perl -d:Trace program", this module will print a message to standard error just before each line is executed.
       For example, if your program looks like this:

	       #!/usr/bin/perl

	       print "Statement 1 at line 4
";
	       print "Statement 2 at line 5
";
	       print "Call to sub x returns ", &x(), " at line 6.
";

	       exit 0;

	       sub x {
		 print "In sub x at line 12.
";
		 return 13;
	       }

       Then  the "Trace" output will look like this:

	       >> ./test:4: print "Statement 1 at line 4
";
	       >> ./test:5: print "Statement 2 at line 5
";
	       >> ./test:6: print "Call to sub x returns ", &x(), " at line 6.
";
	       >> ./test:12:   print "In sub x at line 12.
";
	       >> ./test:13:   return 13;
	       >> ./test:8: exit 0;

       This is something like the shell's "-x" option.

DETAILS

       Inside your program, you can enable and disable tracing by doing

	   $Devel::Trace::TRACE = 1;   # Enable
	   $Devel::Trace::TRACE = 0;   # Disable

       or

	   Devel::Trace::trace('on');  # Enable
	   Devel::Trace::trace('off'); # Disable

       "Devel::Trace" exports the "trace" function if you ask it to:

	   import Devel::Trace 'trace';

       Then if you want you just say

	   trace 'on';		       # Enable
	   trace 'off'; 	       # Disable

TODO

       o   You should be able to  send the trace output to the filehandle of your choice.

       o   You should be able to specify the format of the output.

       o   You should be able to get the output into a string.

       We'll see.

LICENSE

       Devel::Trace 0.11 and its source code are hereby placed in the public domain.

Author
       Mark-Jason Dominus (C<mjd-perl-trace@plover.com>), Plover Systems co.  See the C<Devel::Trace.pm> Page at
       http://www.plover.com/~mjd/perl/Trace for news and upgrades.

perl v5.14.2							    2012-02-16								Trace(3pm)
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