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How to implement "not in" logic in UNIX script?

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# 1  
Old 01-27-2014
How to implement "not in" logic in UNIX script?
Hi Gurus,

I need use "not in " logic in my script, like below

Code:
if $name not in exception_file_list, then do something.

anyone can help out this?

Thanks in advance.
Last edited by ken6503; 01-27-2014 at 12:22 PM..
# 2  
Old 01-27-2014
Hello,

Kindly use the code tags while posting as per forum rules.

Here is an exmaple which may help you.


Code:
cat check_specific_txt.ksh
 
value=`cat make_test.ksh | grep XYZ"`
if [[ -z ${value} ]]
then
echo "Not match"
else
echo "Match found"
fi
Not match



Thanks,
R. Singh
This User Gave Thanks to RavinderSingh13 For This Post:
ken6503
# 3  
Old 01-27-2014
Quote:
Originally Posted by RavinderSingh13
Hello,

Kindly use the coee tags whiule posting as per forum rules.

Here is an exmaple which may help you.


Code:
cat check_specific_txt.ksh
 
value=`cat make_test.ksh | grep XYZ"`
if [[ -z ${value} ]]
then
echo "Not match"
else
echo "Match found"
fi
Not match

Thanks for your quick response, Sorry I didn't put code tag in my initial posting.



Thanks,
R. Singh
# 4  
Old 01-27-2014
Hai Ken Here is an example might help you

Code:
$ cat Jan.txt
10  Jan 100
30  Jan 300
50  Jan 500

$ if ! grep Feb Jan.txt >/dev/null; then echo "yes"; else echo "No"; fi
yes

This User Gave Thanks to Akshay Hegde For This Post:
ken6503
# 5  
Old 01-27-2014
Quote:
Originally Posted by Akshay Hegde
Code:
$ if ! grep Feb Jan.txt >/dev/null; then echo "yes"; else echo "No"; fi
yes

Instead of redirecting to /dev/null, consider using grep -q. -q tells grep that you are only interested in the exit status, so if a match is found grep can exit immediately, avoiding unnecessary i/o.

Regards,
Alister
# 6  
Old 01-27-2014
Hi Akshay & R. Singh
Both ways work perfect.

Thank you very much.

Have a nice day.
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