Sponsored Content
Top Forums Shell Programming and Scripting perl - how come this script works? Post 302136370 by cbkihong on Monday 17th of September 2007 10:27:45 AM
Old 09-17-2007
Quote:
Originally Posted by mjays
but in the code above @contents isn't defined.
It is implicitly created for you. In this case, it is an array with no elements inside. You can always put

@contents = ();

at the top of the script to make your intent specific (I usually do this), but it is not required.

To explicitly declare it as a lexical is in fact a better practice, so that becomes

my @contents = ();

As for your posted program, it is a very simple one (I think you have stated it yourself). If you have any specific queries, feel free to follow-up.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script works with bash 3.0 but not 3.2.

Hello, So my knowledge of bash scripting is not that great and I have been trying to solve this problem on my own for awhile to no avail. Here's the error I get when running it with an OS that uses bash 3.2.x: testagain.sh: line 10: *-1: syntax error: operand expected (error token is... (2 Replies)
Discussion started by: forkandspoon
2 Replies

2. Shell Programming and Scripting

perl oneliner not works .pl script

I am trying to take first 3 columns in a file which matches the word "abc", but i am getting the below error, <error> Global symbol "@F" requires explicit package name at ./new.pl </error> whereas when i give the below,grep abc /home/test/file.txt|perl -lane 'print \"$F $F $F\" in unix prompt... (4 Replies)
Discussion started by: anspks
4 Replies

3. Shell Programming and Scripting

perl/unix: script in command line works but not in perl

so in unix this command works works and shows me a list of directories find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt but when i try running a perl script to run this command my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';... (2 Replies)
Discussion started by: kpddong
2 Replies

4. Shell Programming and Scripting

Script works but doesn't?

Hi everyone I'm new here so and I'm just starting to learn a bit of Solaris and I'm working on repairing 10 year old scripts for our system here at work. When I execute the commands at my prompt everything go's through smooth. I'm using gedit to edit my code because I'm still getting used to the... (4 Replies)
Discussion started by: 82280zx
4 Replies

5. Shell Programming and Scripting

perl: Command works in terminal, but not in shell script

Hi, the following command works in the terminal no problem. samtools view -h rawlib.bam | perl -ne '{ @line = split( /\s+/ ); $match = 0; while( $line =~ /(\d+)M/g ) { $match = $match + $1 } if( $match >= 80 || $_ =~ /^\@/ ) { print $_ } }' | java -Xmx12G -jar... (8 Replies)
Discussion started by: jdilts
8 Replies

6. Shell Programming and Scripting

Script almost works... one error

Helo, i have written a bash script for running my calculations. anyway, according to shellcheck the error is somewhere in the while loop or in the if condition. so the idea of this script is: submit a job with a name. while it is in the queue it has a job ID number. after the job is done i... (2 Replies)
Discussion started by: carborane
2 Replies

7. Shell Programming and Scripting

Perl error in batch command but works one at a time

In the below perl executes if one file is processed perfect. However, when multiple files are processed in batch which is preferred I get the below error that I can not seem to fix it as the '' necessary for the command to execute, but seem to only work for one -arg option. Thank you :). ... (2 Replies)
Discussion started by: cmccabe
2 Replies

8. Shell Programming and Scripting

Need to understand how the line in perl program works as shell commend

I have a file with two line, one is header, the other actual value: TYPCD|ETID2|ETID|LEG ID|PTYP|PTYP SUB|TRD STATUS|CXL REASON|CACT|CACTNM|ENCD|ENC D NM|TRDR|ASDT|TRDT|MTDT|STDT|LS|SECID|SECID TYP|SECNM|PAR|STCC|MARKET PRICE|DIS MARKET PRICE|MARKET PRICE CURRENCY|SRC OF SETTLEMENT... (2 Replies)
Discussion started by: digioleg54
2 Replies

9. Shell Programming and Scripting

Shell script works fine as a standalone script but not as part of a bigger script

Hello all, I am facing a weird issue while executing a code below - #!/bin/bash cd /wload/baot/home/baotasa0/sandboxes_finance/ext_ukba_bde/pset sh UKBA_publish.sh UKBA 28082015 3 if then echo "Param file conversion for all the areas are completed, please check in your home directory"... (2 Replies)
Discussion started by: ektubbe
2 Replies

10. Shell Programming and Scripting

Script works, but I think it could be better and faster

Hi All, I'm new to the forum and to bash scripting. I did some stuff with VB.net, Batch, and VBScripting in the past, but because I shifted over to Linux, I am learning to script in Bash at this moment. So bear with me if I seem to script like a newbie, that's just because I am ;-) OK, I... (9 Replies)
Discussion started by: cornelvis
9 Replies
DROP FOREIGN DATA 
WRAPPER(7) SQL Commands DROP FOREIGN DATA WRAPPER(7) NAME
DROP FOREIGN DATA WRAPPER - remove a foreign-data wrapper SYNOPSIS
DROP FOREIGN DATA WRAPPER [ IF EXISTS ] name [ CASCADE | RESTRICT ] DESCRIPTION
DROP FOREIGN DATA WRAPPER removes an existing foreign-data wrapper. To execute this command, the current user must be the owner of the for- eign-data wrapper. PARAMETERS
IF EXISTS Do not throw an error if the foreign-data wrapper does not exist. A notice is issued in this case. name The name of an existing foreign-data wrapper. CASCADE Automatically drop objects that depend on the foreign-data wrapper (such as servers). RESTRICT Refuse to drop the foreign-data wrappers if any objects depend on it. This is the default. EXAMPLES
Drop the foreign-data wrapper dbi: DROP FOREIGN DATA WRAPPER dbi; COMPATIBILITY
DROP FOREIGN DATA WRAPPER conforms to ISO/IEC 9075-9 (SQL/MED). The IF EXISTS clause is a PostgreSQL extension. SEE ALSO
CREATE FOREIGN DATA WRAPPER [create_foreign_data_wrapper(7)], ALTER FOREIGN DATA WRAPPER [alter_foreign_data_wrapper(7)] SQL - Language Statements 2010-05-14 DROP FOREIGN DATA WRAPPER(7)
All times are GMT -4. The time now is 08:13 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy