Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: PERL: how to tell if variable is NULL
Top Forums Shell Programming and Scripting PERL: how to tell if variable is NULL Post 34867 by dangral on Tuesday 18th of March 2003 02:18:17 PM
Old 03-18-2003
Works like a charm...thanks.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

How to filter a null variable.

I have the necessity to use this command: cat file1 | grep $A | grep $B where sometime A and, or, B are not set. For example: I set A=@ never defined or set B The above command send a cat error. Any idea? Thanks. Giovanni (1 Reply)
Discussion started by: gio123bg
1 Replies

2. Shell Programming and Scripting

check for NULL variable

Hello I want to check for NULL variable.. but this is not working..please help thanks in advance esham (2 Replies)
Discussion started by: esham
2 Replies

3. Shell Programming and Scripting

test Null variable

hi forum i beginning with script and i want test un null variable in a schell i just don t know the syntax here is a litle example y=test echo $y unset y echo $y (so here Y = Null) if Y=Null then echo "y is null" exit fi (1 Reply)
Discussion started by: kykyboss
1 Replies

4. Shell Programming and Scripting

not null cheking of an argument in perl

Hi, I have to check whether an argument say $ARGV is not null in an if operator. Please let me know the operator. It would be great if you write a psuedo code. Thanks in advance Ammu (4 Replies)
Discussion started by: ammu
4 Replies

5. Shell Programming and Scripting

how to check null variable

korn shell If then update_smartcare_user_password "$u_id" else echo "Not a database user" fi i get this error Syntax error at line *** : `then' is not expected. what should i do. I want to check whether $a is null or not. (2 Replies)
Discussion started by: sachin.gangadha
2 Replies

6. Shell Programming and Scripting

Question on NULL and zero value of variable

Hi all, I have a stupid question on NULL and zero(0). In a script I've been working with, one of the lines is: if && then The problem I seem to have is when $Current_csm2 is null, this if block is not triggered, and I don't get why because I was under the impression that NULL!=0 Can... (7 Replies)
Discussion started by: spynappels
7 Replies

7. Shell Programming and Scripting

Value of variable is NULL, but test doesn't seem to recognize

Hello, Unix-forums! My problem: read -p "Enter any number, please" number sleep 1 echo $number | tr -d 0-9 test -z $number && echo "Thank you" || echo "This is not a number"Test always displays "This is not a number". It doesn't matter if I entered a or 1. But if I order echo... (2 Replies)
Discussion started by: intelinside
2 Replies

8. Shell Programming and Scripting

Checking for null condition in a UNIX variable

i have this code for i in `cat sql_output.txt` do -- some script commands done sql_output.txt has 1 column with employee_ids If the sql_output.txt is null then the do loop should not execute. How can i implement this. for i in `cat sql_output.txt` If i is null or empty then ... (5 Replies)
Discussion started by: rafa_fed2
5 Replies

9. Shell Programming and Scripting

If condition to check null variable

Guys, Please help me on the below sample.cfg var=NULL sample.sh #!/bin/sh . /sample.cfg if ;then 1 st command here else 2 nd command here fi (3 Replies)
Discussion started by: AraR87
3 Replies

10. Shell Programming and Scripting

If grep value is null then assign 0 to variable

DELETE=`cat $logfile1 | egrep -i "Delete" | sed 's/ */ /g' | cut -d" " -f2` INSERT=`cat $logfile1 | egrep -i "Insert" | sed 's/ */ /g' | cut -d" " -f2` UPDATE=`cat $logfile1 | egrep -i "Update" | sed 's/ */ /g' | cut -d" " -f2` I need soming like below: if value is null... (8 Replies)
Discussion started by: Veera_V
8 Replies

LEARN ABOUT DEBIAN

asp-perl

ASP-PERL(1p)						User Contributed Perl Documentation					      ASP-PERL(1p)

NAME

       asp-perl - Apache::ASP CGI and command line script processor

SYNOPSIS

       asp-perl [-hsdb] [-f asp.conf] [-o directory] file1 @arguments file2 @arguments ...

	   -h  Help you are getting now!
	   -f  Specify an alternate configuration file other than ./asp.conf
	   -s  Setup $Session and $Application state for script.
	   -d  Set to debug code upon errors.
	   -b  Only return body of document, no headers.
	   -o  Output directory, writes to files there instead of STDOUT
	   -p  GlobalPackage config, what perl package are the scripts compiled in.

DESCRIPTION

       This program will run Apache::ASP scripts from the command line.  Each file that is specified will be run, and the $Request->QueryString()
       and $Request->Form() data will be initialized by the @arguments following the script file name.

       The @arguments will be written as space separated words, and will be initialized as an associate array where %arguments = @arguments.  As
       an example:

	asp-perl file.asp key1 value1 key2 value2

       would be similar to calling the file.asp in a web environment like

	/file.asp?key1=value1&key2=value2

       The asp.conf script will be read from the current directory for parameters that would be set with PerlSetVar normally under mod_perl.  For
       more information on how to configure the asp.conf file, please see < http://www.apache-asp.org/cgi.html >

SEE ALSO

       perldoc Apache::ASP, and also http://www.apache-asp.org

COPYRIGHT

       Copyright 1998-2004 Joshua Chamas, Chamas Enterprises Inc.

       This program is distributed under the GPL.  Please see the LICENSE file in the Apache::ASP distribution for more information.

perl v5.14.2							    2011-08-15							      ASP-PERL(1p)
All times are GMT -4. The time now is 01:56 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy