Login or Register to Ask a Question and Join Our Community

Sponsored Content
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 302651843 by pludi on Wednesday 6th of June 2012 08:59:10 AM
Old 06-06-2012
For readability, here's a formatted and numbered version:
Code:
  1 #!/usr/bin/perl
  2 $/ = "\n\n";
  3 open( DATA, 'mutationsonly.txt' );
  4
  5 # or die("Could not open mutationsonly file.");
  6 open( MYOUTPUT, ">newmutations.txt" );
  7
  8 # or die ("could not open newmutations file.");
  9 my @records = <DATA>;
 10 close(MYOUTPUT);
 11 close(DATA);
 12 foreach my $record (@records) {
 13     chomp;
 14     my $find = /^\*FIELD\*\sAV$/;
 15     if ( $record =~ m/ $find / ) {
 16         print "$record";
 17     }
 18 }

My guess is that in line 14 you're trying to assign a regular expression to a variable, and use that in the match below. To do that, you'd have to use the qr// construct, and it would be much more efficient to do that outside the loop, instead of each time again.

Other than that, you can probably do the same thing with a simple grep {}, eg
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);
print grep { /^\*FIELD\*\sAV$/ } @records;

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl printing error

Hi Scripting Gurus, I am new bee in perl, and trying to write a script which must print the free disk space availability of C and E drives. Please advice. Here is the script snippet and expected output: #!/usr/bin/perl use CGI qw/:html3 :standard/; $spaceuselog =... (4 Replies)
Discussion started by: ccsaviour
4 Replies

2. Shell Programming and Scripting

Problem using mailx instead of mail in perl program

I have a perl program that uses the mail program to send emails. It works fine but because I want to change the return address on the emails to be different I need to use mailx with the "-r" option. the problem is when I change this line to use mailx I no longer recieve "any" emails. This works... (1 Reply)
Discussion started by: kieranfoley
1 Replies

3. Shell Programming and Scripting

[Perl] Printing - Scalars

Hey Guys, I have some weird problem with printing scalars ... When I'm executing script both are printing in terminal ... But only one is printed to the file ? I don't know whats going on .. :) Btw .. I'm noobie :) took me lots of time to put this simple script together :) Thank you... (3 Replies)
Discussion started by: NDxiak
3 Replies

4. Shell Programming and Scripting

Printing between 2 matches with Perl

Can we please modify this perl one-liner to print lines between pattern1 and pattern2 in a file? Currently it prints lines till pattern2. (4 Replies)
Discussion started by: anand_bh
4 Replies

5. Homework & Coursework Questions

Calling compiled C program with Perl program

Long story short: I'm working inside of a Unix SSH under a bash shell. I have to code a C program that generates a random number. Then I have to call the compiled C program with a Perl program to run the C program 20 times and put all the generated random #s into a text file, then print that text... (1 Reply)
Discussion started by: jdkirby
1 Replies

6. Shell Programming and Scripting

help with perl database printing

Hey guys i am using perl and trying to pull a list of books from a database and then populate the list in a separate TT2 file. When the list is generated there should be 39 book names. When I do the foreach statement in my tt2 below, the first statement gives me 39 Array(random number) and the... (1 Reply)
Discussion started by: Joey12
1 Replies

7. Shell Programming and Scripting

Need help in Perl Script for printing next line

I got multiple of documents in which i have to extract a line coming after a ID..The scenario is Customer ID: none VT : 002/89 Customer ID: Yes VT: 001/89 Customer ID: none VT: 006/85 Customer ID: Yes VT: 003/56 I have to extract the id which is coming after YES..The output... (7 Replies)
Discussion started by: rajkrishna89
7 Replies

8. Shell Programming and Scripting

Creating Printing Program in bash

HI I am trying to create a bash script to print whatever i type in It has to have these below to define the size of the label and what size to print the text N q609 A100,10,0,5,2,2,N," " P1 It has to be sent to below > /dev/usblp0 So what it has to be is Written... (12 Replies)
Discussion started by: bganse
12 Replies

9. Shell Programming and Scripting

count number of entries perl program or Unix script

Hi I have a file with number of entries name 1 123 name 1 345 name 1 65346 name2 3243 name2 24234 name 2 234234 so on ......... how to count total number of entries for name 1 and name2...and so on Please guide. (1 Reply)
Discussion started by: manigrover
1 Replies

10. Shell Programming and Scripting

Perl program get a response before the program quits

I created a program, so a kid can practice there math on it. It dispenses varies math problems and the kid must input an answer. I also want it to grade the work they have done, but I can't find the best place for it to print out the grade. I have: if ( $response =~ m/^/ ) { $user_wants_to_quit... (1 Reply)
Discussion started by: germany1517
1 Replies

LEARN ABOUT DEBIAN

vm

VM(1)								      mgetty								     VM(1)

NAME

       vm - VoiceModem is the program for handling the voice modem functionality from shell scripts

ACTIONS

       beep options [<frequency [<length in 0.001sec>]]>
       diagnostics options device name (e.g. ttyS2
       dial options phone number
       help
       play options [<file names]+>
       record options file name
       shell options [<shell script [shell options]]>
       wait  options [<time in seconds]>
       devicetest

OPTIONS

       -c n use compression type n
       -d n set i/o device
       -t, -m, -i, -e, -s, -H equals to -d <2,3,4,5,6,7>
       -l s set device string (e.g. -l ttyS2:ttyC0)
       -v verbose output
       -w use off / on hook signal from local handset to start and stop recording
       -x n set debug level
       -L n set maximum recording length in sec
       -P print first DTMF tone on stdout and exit
       -R read and print DTMF string on stdout and exit
       -S s set default shell for shell scripts (e.g. -S /bin/sh)
       -T n set silence timeout in 0.1sec
       -V n set silence threshold to <n> (0-100%%)

SEE ALSO

       vgetty(1)

POD ERRORS

       Hey! The above document had some coding errors, which are explained below:

       Around line 30:
	   You forgot a '=back' before '=head1'

       Around line 32:
	   '=item' outside of any '=over'

       Around line 71:
	   You forgot a '=back' before '=head1'

perl v5.10.1							    2010-04-04								     VM(1)
All times are GMT -4. The time now is 12:46 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy