Login or Register to Ask a Question and Join Our Community


Shell Programming and Scripting

reduce the or conditions

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Shell Programming and Scripting reduce the or conditions
# 1  
Old 05-02-2007
reduce the or conditions
Hi ,

how can i reduce the or conditions:

if [[ -z $XXXX || -z $YYYYY || -z $TTTT || -z $NNNN || -z $QQQQ ]]; then

whatever

fi
# 2  
Old 05-02-2007
Do you want to speed it up? Consider putting the likeliest cases on the left hand side of the if statement, if this is POSIX shell.

Otherwise, what are you trying to do?
# 3  
Old 05-02-2007
How about?
Code:
case "+$XXXX+$YYYYY+$TTTT+$NNNN+$QQQQ+" in
 *++* ) whatever;;
esac

# 4  
Old 05-02-2007
Incorrect post, Moderators please delete this
# 5  
Old 05-02-2007
Quote:
Originally Posted by jim mcnamara
Do you want to speed it up? Consider putting the likeliest cases on the left hand side of the if statement, if this is POSIX shell.

Otherwise, what are you trying to do?
I am trying to check if all the variables has been initialized or not. there are too many 'or' (||) conditions which i want to reduce so that it looks better
# 6  
Old 05-02-2007
Quote:
Originally Posted by hitmansilentass
there are too many 'or' (||) conditions which i want to reduce so that it looks better
It's not clear what you mean by "looks better". Exactly what would "look better" look like? Assuming your variables do not contain whitespace, another alternative without || might be
Code:
if [[ `echo $XXXX $YYYYY $TTTT $NNNN $QQQQ |wc -w` -ne 5 ]]; then
whatever
fi

# 7  
Old 05-02-2007
Quote:
Originally Posted by hitmansilentass
Hi ,

how can i reduce the or conditions:

if [[ -z $XXXX || -z $YYYYY || -z $TTTT || -z $NNNN || -z $QQQQ ]]; then

whatever

fi

To exit the script if any var is empty or unset:

Code:
: ${XXXX:?} ${YYYYY:?} ${TTTT:?} ${NNNN:?} ${QQQQ:?}

To execute something if any parameter is empty or unset:

Code:
var=${XXXX:+A}${YYYYY:+A}${TTTT:+A}${NNNN:+A}${QQQQ:+A}
if [ ${#var} -ne 5 ]; then
Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Reduce the space every four hours

Hi Team, Please help me in shell script, I have a some file in Linux which I want to reduce the space every 4 hours in the form of ZIP move to other location with the help of Shell Script using with with current date. Can you please help me. Regards, Suhail (3 Replies)
Discussion started by: frsuhail001
3 Replies

2. Shell Programming and Scripting

Help to reduce time of archiving

hi all, i have written the following script that does this work: 1. copy large logs files from one server to another. 2. then unzip this files and extraxt from these large https logs only those fields that are neccesary. 3. then archive the extracted logs to new files. BUT the problem is... (7 Replies)
Discussion started by: arrals_vl
7 Replies

3. Shell Programming and Scripting

Errors in if conditions with to many OR conditions

Hi ALL I have a script where in i need to check for several values in if conditons but when i execute the script it throws error such as "TOO MANY ARGUMENTS" if then msg="BM VAR Issue :: bmaRequestVAR=$bmaRequestVAR , nltBMVAR=$nltBMVAR , bmaResponseVAR=$bmaResponseVAR ,... (10 Replies)
Discussion started by: nikhil jain
10 Replies

4. Shell Programming and Scripting

How to reduce code.....

Hi All, Could some one help me to reduce the code... if then ./plist -m "$queuename" |grep $2|awk '{print $3}' >unlock.log elif then ./plist -m "$queuename" |grep $2|awk '{print $4}' >unlock.log else ./plist -m "$queuename" |grep $2|awk '{print $5}' >unlock.log . . . . ... (1 Reply)
Discussion started by: harshakusam
1 Replies

5. Shell Programming and Scripting

Reduce

printf "\nClosing stats:\n" >> data.txt echo >> data.txt sed 's/^ \t*//;/^#/d;/^$/d' $stats | while read line do close=$(grep -w "^$line" $datafile | sed -e 's/\(.*\),\(.*\),\(.*\)/\2/') if ; then printf "%5d. %-s was not found in file\n"... (3 Replies)
Discussion started by: jafa401
3 Replies

6. AIX

reduce used paging space

Hi I have used gzip on AIX and the used paging space has jumped from 7% to 20%. The gzip process is finished since a long time. But the used paging space is still the same. How to release this space ? (1 Reply)
Discussion started by: bfarah
1 Replies

7. Shell Programming and Scripting

reduce a string

hi i have a string "hostname=lpdma520_dev_ipc_us_aexp_com" now i need only "newHostname=lpdma520" how to do this one please help soon (2 Replies)
Discussion started by: satish@123
2 Replies

8. Shell Programming and Scripting

To reduce execution time

Hi All, The below script I run daily and it consumes 2 hours approx. In this I am calling another script and executing the same twice. Is the loop below the cause for the slow process?Is it possible to finetune the program so that it runs in a much faster way? The first script: #!/bin/ksh... (4 Replies)
Discussion started by: Sreejith_VK
4 Replies

9. UNIX for Dummies Questions & Answers

Can I reduce sysdump?

Hi, I have a server which is running out of space on the rootvg. When trying to find some spare space I discovered there are 2 sysdump logical volumes, each of 5GB, yet if I get an estimate of the dump size it's only 0.5 GB. $ lsvg -l rootvg|grep sysdump hd71 sysdump 20 ... (1 Reply)
Discussion started by: m223464
1 Replies

10. AIX

reduce available ram

hello, we have a aix 5.2 server with 8GB of ram. is it possible, without actually removing the hardware, to have the O/S think it has only 4GB of ram? We would like to see how the handles and responds if it only had 4Gb instead of the 8GB. Any ideas or suggestions? Thanks Looks like i found... (6 Replies)
Discussion started by: zuessh
6 Replies
Login or Register to Ask a Question