Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: [Need help] perl script to find the occurance of string from a text file
Top Forums Shell Programming and Scripting [Need help] perl script to find the occurance of string from a text file Post 302932206 by balajesuri on Tuesday 20th of January 2015 02:09:22 AM
Old 01-20-2015
This is a crude form.. written quickly in 5 mins. It's not efficient and is a dirty job. If you see.. there are nested loops and if you have large input and keyword files, it might bring down the efficiency.
Code:
#! /usr/bin/perl -w
use strict;

my ( %keywords );
my ( $line, $key, $value );

open K, "< keyword.txt";
while ( $line = <K> ) {
    chomp ( $line );
    $keywords { $line } = 0;
}
close K;

open I, "< input.txt";
while ( $line = <I> ) {
    chomp ( $line );
    foreach $key ( keys %keywords ) {
        while ( $line =~ /$key/g ) {
            $keywords{ $key }++;
        }
    }
}
close I;

while ( ( $key, $value ) = each %keywords ) {
    print "$key has occured $value times.\n";
}

 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Looking for command(s)/ script to find a text string within a file

I need to search through all files with different file suffixes in a directory structure to locate any files containing a specific string (5 Replies)
Discussion started by: wrwelden
5 Replies

2. UNIX for Dummies Questions & Answers

count string occurance in a file hourly

Hi, I file that has all the status for one day (24hours). Now what I want to do is to count the occurence of a string in its output hourly like for example count occurance of successful or asynchronous clear destinon for every hour and redirect it to file. Please see sample file below. Please... (2 Replies)
Discussion started by: ayhanne
2 Replies

3. UNIX for Dummies Questions & Answers

String search - Command to find second occurance

Hi, I am new to Unix world. Is there any command which can directly return the second occurance of a particular string in a file? Basically, I want to read the contents of the file from the second occurance of a particualr string. Can be implemented using a loop, but am just wondering if there... (5 Replies)
Discussion started by: saurabhsinha23
5 Replies

4. Shell Programming and Scripting

PERL: Searching for a string in a text file problem

Looking for a bit of help. I need to search for a string of words, but unfortunately these words are located on separate lines. for example the text output is: United Chanmpions Ronaldo Liverpool Losers Torres and my script code is print("DEBUG - checking file message"); while... (15 Replies)
Discussion started by: meevagh
15 Replies

5. Shell Programming and Scripting

Find string in text file

Hello! Please, help me to write such script. I have some text file with name filename.txt I must check if this file contains string "test-string-first", I must cut from this file string which follows string "keyword-string:" and till first white-space and save it to some variable. For... (3 Replies)
Discussion started by: optik77
3 Replies

6. Shell Programming and Scripting

Removing last occurance of string in text

I have text file as follows and would like to remove the last occurance of "UNION ALL" string and replace @@ with single quote ('). Input text in file is with temp as ( ( select ----------- where OPERATION = @@B@@ and OBJECTTYPE = @@P@@ and start_time desc ) UNION ALL ( select... (9 Replies)
Discussion started by: Vaddadi
9 Replies

7. Shell Programming and Scripting

How to find repeated string in a text file

I have a text file where I need to find the string = ST*850* This string is repetaed several times in the file, so I need to know how many times it appears in the file, this is the text files: ISA*00* *00* *08*925485USNR *ZZ*IMSALADDERSP... (13 Replies)
Discussion started by: cucosss
13 Replies

8. Shell Programming and Scripting

Perl script to read string from file#1 and find/replace in file#2

Hello Forum. I have a file called abc.sed with the following commands; s/1/one/g s/2/two/g ... I also have a second file called abc.dat and would like to substitute all occurrences of "1 with one", "2 with two", etc and create a new file called abc_new.dat sed -f abc.sed abc.dat >... (10 Replies)
Discussion started by: pchang
10 Replies

9. UNIX for Beginners Questions & Answers

Find and replace a string in a text file

Dear all, I want to find all the "," in my text file and then replace the commas to a tab. I found a script online but I don't know how to modify the script for my case. Any one can help? Thank you. @echo off &setlocal set "search=%1" set "replace=%2" set "textfile=Input.txt" set... (2 Replies)
Discussion started by: forevertl
2 Replies

10. UNIX for Beginners Questions & Answers

Insert text after the first occurance of searched string entry in a file

My server xml file has huge data part of which i'm sharing below. I wish to add the below text held by variable "addthisline" after the closing braces i.e --> once the first </Connector> tag is found. addthisline="I need to be inserted after the comments" Thus my searchstring is... (3 Replies)
Discussion started by: mohtashims
3 Replies

LEARN ABOUT CENTOS

perl::critic::policy::miscellanea::requirercskeywords

Perl::Critic::Policy::Miscellanea::RequireRcsKeywords(3)User Contributed Perl DocumentatioPerl::Critic::Policy::Miscellanea::RequireRcsKeywords(3)

NAME

       Perl::Critic::Policy::Miscellanea::RequireRcsKeywords - Put source-control keywords in every file.

AFFILIATION

       This Policy is part of the core Perl::Critic distribution.

DESCRIPTION

       Every code file, no matter how small, should be kept in a source-control repository.  Adding the magical RCS keywords to your file helps
       the reader know where the file comes from, in case he or she needs to modify it.  This Policy scans your file for comments that look like
       this:

	   # $Revision: 4106 $
	   # $Source: /myproject/lib/foo.pm $

       A common practice is to use the "Revision" keyword to automatically define the $VERSION variable like this:

	   our ($VERSION) = '$Revision: 4106 $' =~ m{ $Revision: s+ (S+) }x;

CONFIGURATION

       By default, this policy only requires the "Revision", "Source", and "Date" keywords.  To specify alternate keywords, specify a value for
       "keywords" of a whitespace delimited series of keywords (without the dollar-signs).  This would look something like the following in a
       .perlcriticrc file:

	   [Miscellanea::RequireRcsKeywords]
	   keywords = Revision Source Date Author Id

       See the documentation on RCS for a list of supported keywords.  Many source control systems are descended from RCS, so the keywords
       supported by CVS and Subversion are probably the same.

AUTHOR

       Jeffrey Ryan Thalhammer <jeff@imaginative-software.com>

COPYRIGHT

       Copyright (c) 2005-2011 Imaginative Software Systems.  All rights reserved.

       This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.  The full text of this license
       can be found in the LICENSE file included with this module.

perl v5.16.3							    2014-06-10		  Perl::Critic::Policy::Miscellanea::RequireRcsKeywords(3)
All times are GMT -4. The time now is 09:24 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy