Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: perl- read search and replace string from the file
Top Forums Shell Programming and Scripting perl- read search and replace string from the file Post 302670855 by sasharma on Thursday 12th of July 2012 02:08:11 PM
Old 07-12-2012
perl- read search and replace string from the file
Dear all,
I have a number of files and each file has two sections separated by a blank line. At the top section, I have lines which describes the values of the alphabetical characters,

Code:
# s #; 0.123
# p #; 12.3
# d #; -2.33
# f #; 5.68
<blank line>
sssssss
spfdffff
sdfffffff

Now I want "s" should be replaced by 0.123 in last three lines, "d" by -2.33 etc. Number of alphabetical characters vary in each file and also the number of lines below the blank line may vary.
I am seeking for a perl program preferably, to automate text processing.
-regards and thanks,
satti
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Perl: Search for string on line then search and replace text

Hi All, I have a file that I need to be able to find a pattern match on a line, search that line for a text pattern, and replace that text. An example of 4 lines in my file is: 1. MatchText_randomNumberOfText moreData ReplaceMe moreData 2. MatchText_randomNumberOfText moreData moreData... (4 Replies)
Discussion started by: Crypto
4 Replies

2. Shell Programming and Scripting

How to search a date format from a file an replace with a string in PERL

I am very new to Perl. I am struggling so hard to search a date (such as 10/09/2009, 10-09-2009) from a text file and replace with a string (say DATE) using Perl. Please help me out. Thanks in advance. Regds Doren (4 Replies)
Discussion started by: my_Perl
4 Replies

3. UNIX for Dummies Questions & Answers

Search a string in the file and then replace another string after that position

Hi I am looking for a particular string in a file.If the string exists, then I want to replace another string with some other text.Once replaced, search for the same text after that character position in the file. :wall: E.g: Actual File content: Hello Name: Nitin Raj Welcome to Unix... (4 Replies)
Discussion started by: dashing201
4 Replies

4. Shell Programming and Scripting

Search for a string in a file and replace

I have file t1.log Contents of t1.log file Number of records processed: Number of records rejected: Error : xyz .......... abc .......... aaa _] start time : end time : Please let me know how i can remove the contents highlighted in red in the t1.log file. Thanks Sam (3 Replies)
Discussion started by: sam777
3 Replies

5. Programming

C program to read a binary file and search for a string?

Hi, I am not a C programmer. The only C exposure I have is reading and completing the exercises from the C (ANSI C ) Programming Language book:o At the moment, I am using the UNIX strings command to extract information for a binary file and grepping for a particular string and the value... (3 Replies)
Discussion started by: newbie_01
3 Replies

6. Shell Programming and Scripting

How to read file, and replace certain string with another string?

Hi all, the value in the following file is just an example. It could be a different value/network addresses. Here is my example of initial output in a file name net.txt Initial Output, net.txt The goal is to produce the following format which is to convert from CIDR to Netmask... (6 Replies)
Discussion started by: type8code0
6 Replies

7. Shell Programming and Scripting

Read in search strings from text file, search for string in second text file and output to CSV

Hi guys, I have a text file named file1.txt that is formatted like this: 001 , ID , 20000 002 , Name , Brandon 003 , Phone_Number , 616-234-1999 004 , SSNumber , 234-23-234 005 , Model , Toyota 007 , Engine ,V8 008 , GPS , OFF and I have file2.txt formatted like this: ... (2 Replies)
Discussion started by: An0mander
2 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 Dummies Questions & Answers

Search for a string,delete the line and replace with new string in a file

Hi Everyone, I have a requirement in ksh where i have a set of files in a directory. I need to search each and every file if a particular string is present in the file, delete that line and replace that line with another string expression in the same file. I am very new to unix. Kindly help... (10 Replies)
Discussion started by: Pradhikshan
10 Replies

10. UNIX for Beginners Questions & Answers

Search partial string in a file and replace the string - UNIX

I have the below string which i need to compare with a file and replace this string in the file which matches closely. Can anyone help me on this. string(Scenario 1)- user::r--,user::ourfrd:r-- String(Scenario 2)- user::r-- File **** # file: /local/Desktop/myfile # owner: me # group:... (6 Replies)
Discussion started by: sarathy_a35
6 Replies

LEARN ABOUT LINUX

anacrontab

ANACRONTAB(5)						       Anacron Users' Manual						     ANACRONTAB(5)

NAME

       /etc/anacrontab - configuration file for anacron

DESCRIPTION

       The file /etc/anacrontab describes the jobs controlled by anacron(8).  Its lines can be of three kinds:	job-description lines, environment
       assignments, or empty lines.

       Job-description lines are of one of these two forms:

	  period  delay  job-identifier  command

	  @period_name delay job-identify command

       The period is specified in days, the delay in minutes.  The job-identifier can contain any non-blank character, except slashes.	It is used
       to  identify  the  job in Anacron messages, and as the name for the job's timestamp file.  The command can be any shell command. The fields
       can be separated by blank spaces or tabs.  The period_name can only be set to monthly at the present time. This will ensure jobs  are  only
       run once a month, no matter the number of days in this month, or the previous month.

       Environment assignment lines are of the form:

	  VAR = VALUE

       Spaces  around  VAR  are removed.  No spaces around VALUE are allowed (unless you want them to be part of the value).  The assignment takes
       effect from the next line to the end of the file, or to the next assignment of the same variable.

       Empty lines are either blank lines, line containing white-space only, or lines with white-space followed by a '#' followed by an  arbitrary
       comment.

       You can continue a line onto the next line by ending it with a ''.

SEE ALSO

       anacron(8)

       The Anacron README file.

AUTHOR

       Itai Tzur <itzur@actcom.co.il>

       Currently maintained by Pascal Hakim <pasc@(debian.org|redellipse.net)>.

Pascal Hakim							    2004-07-11							     ANACRONTAB(5)
All times are GMT -4. The time now is 09:40 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy