Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Writing a Perl Script that processes multiple files
Top Forums Shell Programming and Scripting Writing a Perl Script that processes multiple files Post 302562045 by durden_tyler on Wednesday 5th of October 2011 07:28:19 PM
Old 10-05-2011
Quote:
Originally Posted by Corona688
I keep forgetting perl doesn't have continue. That's annoying, it has everything else you could think of...
Perl has "next" and "last" instead:

Code:
$
$
$ # "next" skips current iteration and goes on to the next iteration
$
$ perl -le 'for $i (1..10)
           {
             next if $i%4 == 0;
             print $i
           }'
1
2
3
5
6
7
9
10
$
$
$ # "last" skips current iteration and exits the loop altogether
$
$ perl -le 'for $i (1..10)
           {
             last if $i%4 == 0;
             print $i
           }'
1
2
3
$
$
$

tyler_durden
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Combining Multiple files in one in a perl script

All, I want to combine multiple files in one file. Something like what we do on the commad line as follows -> cat file1 file2 file3 > Main_File. Can something like this be done in a perl script very efficiently? Thanks, Rahul. (1 Reply)
Discussion started by: rahulrathod
1 Replies

2. Shell Programming and Scripting

Multiple processes writing on the same file simultaneously

Hi All, I have encountered a problem,please help me. I have a script in which multiple processes are writing on to the same file . How should I stop this , I mean lock mechanism can be implemented or we can write the at different files and then concatenate the files. What would be a better... (1 Reply)
Discussion started by: Sayantan
1 Replies

3. Shell Programming and Scripting

perl script on multiple files

I have a script that runs on one file (at a time). like this: $> perl myscript.pl filename > output How can I run it on >6000 files and have the output sent out into slightly modified file name $> perl myscript 6000files> output6000files.new extension Thanks in anticipation (4 Replies)
Discussion started by: aritakum
4 Replies

4. Shell Programming and Scripting

Run perl script on files in multiple directories

Hi, I want to run a Perl script on multiple files, with same name ("Data.txt") but in different directories (eg : 2010_06_09_A/Data.txt, 2010_06_09_B/Data.txt). I know how to run this perl script on files in the same directory like: for $i in *.txt do perl myscript.pl $i > $i.new... (8 Replies)
Discussion started by: ad23
8 Replies

5. UNIX for Dummies Questions & Answers

Writing a for loop that processes multiple input files

I would like to write a for loop that does the following: I have a file called X.txt and other files called 1.txt,2.txt, .....,1000.txt. I want to substitute the 6th column of the file X.txt with 1.txt and store the output as X.1. Then I want to do the same with X.txt and 2.txt and store the... (1 Reply)
Discussion started by: evelibertine
1 Replies

6. UNIX for Dummies Questions & Answers

Writing a loop to manipulate a script and store it in multiple output files

I have a script where the the 9th line looks like this: $filename=sprintf("250.1chr%d.ped", $N); I want to modify this script 1000 times, changing 250.1chr%d.ped to 250.2chr%d.ped, 250.3chr%.ped.......and so on all the way to 250.1000chr%d.ped and store each output in files called ... (4 Replies)
Discussion started by: evelibertine
4 Replies

7. UNIX for Dummies Questions & Answers

Writing a loop to process multiple input files by a shell script

I have multiple input files that I want to manipulate using a shell script. The files are called 250.1 through 250.1000 but I only want the script to manipulate 250.300 through 250.1000. Before I was using the following script to manipulate the text files: for i in 250.*; do || awk... (4 Replies)
Discussion started by: evelibertine
4 Replies

8. Shell Programming and Scripting

How can I do one liner import multiple custom .pm files in my perl script?

I am new for Perl I want to ask one question. I have around 50 custom packages which i am using in my Perl script. I want to import all .pm packages in my Perl script in an easy way. Right now i have to import each package individually. So Is there any way to do so?? Right Now i am doing like: ... (1 Reply)
Discussion started by: Navrattan Bansa
1 Replies

9. UNIX for Dummies Questions & Answers

Writing a script to print the number of lines in multiple files

Hi I have 1000 files labelled data1.txt through data1000.txt. I want to write a script that prints out the number of lines in each txt file and outputs it in the following format: Column 1: number of data file (1 through 1000) Column 2: number of lines in the text file Thanks! (2 Replies)
Discussion started by: evelibertine
2 Replies

10. Shell Programming and Scripting

How to run perl script on multiple files of two directories?

Hi I have 100 files under file A labled 1.txt 2.txt.....100.txt(made up name) I have 1 files under file B labled name.txt How can i run the same perl script on 100 files and file name.txt I want to run perl script.pl A/1.txt B/name.txt perl script.pl A/2.txt B/name.txt ....... perl... (3 Replies)
Discussion started by: grace_shen
3 Replies

LEARN ABOUT DEBIAN

seqdiag

SEQDIAG(1)						      General Commands Manual							SEQDIAG(1)

NAME

       seqdiag - generate sequence-diagram image file from spec-text file.

SYNOPSIS

       seqdiag [options] file

DESCRIPTION

       This manual page documents briefly the seqdiag commands.

       seqdiag is generate sequence-diagram image file from spec-text file.

OPTIONS

       These  programs	follow	the  usual  GNU  command  line	syntax, with long options starting with two dashes (`-').  A summary of options is
       included below.	For a complete description, see the Info files.

       --version
	      show program's version number and exit

       -h, --help
	      show this help message and exit

       -a, --antialias
	      Pass diagram image to anti-alias filter

       -c FILE, --config=FILE
	      read configurations from FILE

       -o FILE
	      write diagram to FILE

       -f FONT, --font=FONT
	      use FONT to draw diagram

       -T TYPE
	      Output diagram as TYPE format

SEE ALSO


       The programs are documented fully by
       http://tk0miya.bitbucket.org/seqdiag/build/html/index.html

AUTHOR

       seqdiag was written by Takeshi Komiya <i.tkomiya@gmail.com>

       This manual page was written by Kouhei Maeda <mkouhei@palmtb.net>, for the Debian project (and may be used by others).

								   May 21, 2011 							SEQDIAG(1)
All times are GMT -4. The time now is 09:25 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy