Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Comparing Variables in Perl
Top Forums Shell Programming and Scripting Comparing Variables in Perl Post 302237797 by avronius on Thursday 18th of September 2008 11:26:24 AM
Old 09-18-2008
If you wanted to loop through each element in an array to do a one-to-one evaluation for each element pair in an array, you can:

Code:
$elementCount = @a;
$count = 0;

while ( $count < $elementCount )
{
   if ( $a[$count] == $b[$count] )
   {
      print "\$a[$count]: $a[$count] = \$b[$count]: $b[$count]\n";
   }
   $count++;
}

(remember to use eq instead of == if you are working with text)

EDIT: changed line in red
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

comparing variables

I have searched and found a few threads that have dealt with this, but the examples I've tried haven't seemed to help. I am monitoring our database log for high checkpoints. I can parse out the checkpoint value which can be anywhere from zero into a 3 digit number. I set a variable to be the... (3 Replies)
Discussion started by: MizzGail
3 Replies

2. Shell Programming and Scripting

Comparing two variables

Script #!/bin/sh hardware=PC os=WindowsNET for i in `cat newservers` do x=`sudo /opt/openv/netbackup/bin/admincmd/bpplclients |grep $i |head -40 |grep $i|awk '{print $3;exit}'` if then echo "$i is already added" else echo "Need to add" fi done O/p in debug mode bash-2.05$... (3 Replies)
Discussion started by: rajip23
3 Replies

3. UNIX for Dummies Questions & Answers

comparing variables

im trying to compare ipaddresses. i loop through an array to see if the ip is already is in the array and if it is it should set a flag and then i wont add it to the array. but its just adding all the ipaddresses to the array if ] then ... (3 Replies)
Discussion started by: magnia
3 Replies

4. Shell Programming and Scripting

Comparing variables in awk

I'm writing a shellscript that monitors the price of a watch. If the prices changes, it should email me. The body of the email will show the old price and the new price. However when I compare the two awk variables(oldprice and newprice) it always says they're not the same. The shellscript goes out... (2 Replies)
Discussion started by: Shinsuio
2 Replies

5. Shell Programming and Scripting

Comparing multiple variables

Hi! I've come up with a ksh-script that produces one or more lists of hosts. At the and of the script, I would like to print only those hosts that exists in all the lists. Ex. HOSTS="host1 host2 host3 host11" HOSTS="host1 host2 host4" HOSTS="host2 host11" HOSTS="host2 host5 host6 host7... (1 Reply)
Discussion started by: Bugenhagen
1 Replies

6. Shell Programming and Scripting

comparing multiple variables by 'if then'

Hi, I am a noob at shell scripting. basically I am trying to compare row counts from 8 tables in different databases. I have managed to get the row counts using awk from the spool files for both databases. now I have 16 variables with me for database 1 : $A $B $C $D $E $F $G... (3 Replies)
Discussion started by: smallville
3 Replies

7. UNIX for Dummies Questions & Answers

Comparing the characters of 2 variables

hi i am writing a hangman script and am having trouble checking the correct letters against the word i need the script to compare the word against the letters guessed that are correct so once all the letters within the word have been guessed it will alow me to create a wining senario eg ... (13 Replies)
Discussion started by: lsecer
13 Replies

8. Shell Programming and Scripting

comparing variables in an if statement

#!/bin/bash #timetest TIMENOW="$(date)" T1=12:00:00 echo $TIMENOW >timenow cat timenow |cut -f4 -d' ' >time1 T2=$(sed -n "${1}p" time1) echo "T1 = " $T1 echo "T2 = " $T2 if then echo $T1 else echo $T2 fi I thought scripting was simple! So why does this script result in: T1 =... (4 Replies)
Discussion started by: habuchas
4 Replies

9. Shell Programming and Scripting

awk comparing variables

Is there a way to compare variables in a 'awk'? I've been trying for a while and can't figure it out. I'm guessing its not possible :/ VAR=Bob awk '$3 == $VAR { print $1 }' file.txt Regards Jikuu (4 Replies)
Discussion started by: Jikuu
4 Replies

10. Shell Programming and Scripting

Comparing two variables

I have a script like this. Just couldn't get the comparison part work. Any thought? thanks, #!/usr/bin/ksh -x STEP=`echo $(basename $0 .ksh) | tr "" ""` log=/skip.log while read LINE do if then echo `date`: STEP $STEP skipped by user >> $log exit 0 fi done < $1 echo... (0 Replies)
Discussion started by: ghostmic
0 Replies

LEARN ABOUT OPENSOLARIS

_lwp_sema_init

_lwp_sema_wait(2)						   System Calls 						 _lwp_sema_wait(2)

NAME

       _lwp_sema_wait, _lwp_sema_trywait, _lwp_sema_init, _lwp_sema_post - semaphore operations

SYNOPSIS

       #include <sys/lwp.h>

       int _lwp_sema_wait(lwp_sema_t *sema);

       int _lwp_sema_trywait(lwp_sema_t *sema);

       int _lwp_sema_init(lwp_sema_t *sema, int count);

       int _lwp_sema_post(lwp_sema_t *sema);

DESCRIPTION

       Conceptually,  a  semaphore  is an non-negative integer count that is atomically incremented and decremented. Typically this represents the
       number of resources available. The _lwp_sema_init() function initializes the count, _lwp_sema_post() atomically increments the  count,  and
       _lwp_sema_wait() waits for the count to become greater than 0 and then atomically decrements it.

       LWP  semaphores	must  be  initialized  before  use.  The _lwp_sema_init() function initializes the count associated with the LWP semaphore
       pointed to by sema to count.

       The _lwp_sema_wait() function blocks the calling LWP until the semaphore count becomes greater than 0 and then atomically decrements it.

       The _lwp_sema_trywait() function atomically decrements the count if it is greater than zero. Otherwise it returns an error.

       The _lwp_sema_post() function atomically increments the semaphore count. If there are any LWPs blocked on the semaphore, one is unblocked.

RETURN VALUES

       Upon successful completion, 0 is returned. A non-zero value indicates an error.

ERRORS

       The _lwp_sema_init(), _lwp_sema_trywait(), _lwp_sema_wait(), and _lwp_sema_post() functions will fail if:

       EINVAL	 The sema argument points to an invalid semaphore.

       EFAULT	 The sema argument points to an illegal address.

       The  _lwp_sema_wait() function will fail if:

       EINTR	The function execution was interrupted by a signal or fork(2).

       The  _lwp_sema_trywait() function will fail if:

       EBUSY	The function was called on a semaphore with a zero count.

       The  _lwp_sema_post() function will fail if:

       EOVERFLOW    The value of the sema argument exceeds SEM_VALUE_MAX.

SEE ALSO

       fork(2)

SunOS 5.11							    8 May 1998							 _lwp_sema_wait(2)
All times are GMT -4. The time now is 02:36 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy