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Grep regex filter

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# 1  
Old 02-09-2014
Grep regex filter
Hi,

How can I run the grep search in a script to only include compute, not bigcomputer in following search input?

Code:
"   properties = local compute"
"   properties = local bigcompute"

Thank you.

-j
Last edited by Scrutinizer; 02-09-2014 at 02:38 AM.. Reason: code tags
# 2  
Old 02-09-2014
Quote:
Originally Posted by hce
Hi,

How can I run the grep search in a script to only include compute, not bigcomputer in following search input?

" properties = local compute"
" properties = local bigcompute"

Thank you.

-j
--edit--

Code:
$ cat <<test | grep  -w 'compute'
" properties = local compute"
" properties = local bigcompute"
test

" properties = local compute"

Last edited by Akshay Hegde; 02-09-2014 at 01:19 AM..
This User Gave Thanks to Akshay Hegde For This Post:
hce
# 3  
Old 02-09-2014
That's UUOC, could be simply <<test grep -w
This User Gave Thanks to MadeInGermany For This Post:
hce
# 4  
Old 02-09-2014
-w is an extension to POSIX grep and is not available on every platform. An alternative that should work in any POSIX grep would be:

Code:
grep -E '([^[:alnum:]_]|^)compute([^[:alnum:]_]|$)' file

This User Gave Thanks to Scrutinizer For This Post:
hce
# 5  
Old 02-09-2014
Quote:
Originally Posted by Scrutinizer
-w is an extension to POSIX grep and is not available on every platform. An alternative that should work in any POSIX grep would be:

Code:
grep -E '([^[:alnum:]_]|^)compute([^[:alnum:]_]|$)' file

Thanks for all response, that are all great, but it is a little bit complicated, I forgot to mention that the search string needs to include "properties = ......" for only the line of "properties =" as other lines could also contain "computer" or "bigcomputer" as well.

-j
Last edited by hce; 02-09-2014 at 07:47 PM..
# 6  
Old 02-09-2014
Then try this:
Code:
grep -E 'properties =.*[^[:alnum:]_]compute([^[:alnum:]_]|$)' file

If it does not need to be portable, on some platforms you can also try one of the following:
Code:
grep 'properties =.*[[:<:]]compute[[:>:]]' file
grep 'properties =.*\<compute\>' file
grep 'properties =.*\bcompute\b' file

Last edited by Scrutinizer; 02-10-2014 at 01:52 AM..
This User Gave Thanks to Scrutinizer For This Post:
hce
# 7  
Old 02-10-2014
Quote:
Originally Posted by Scrutinizer
Then try this:
Code:
grep -E 'properties =.*[^[:alnum:]_]compute([^[:alnum:]_]|$)' file

If it does not need to be portable, on some platforms you can also try one of the following:
Code:
grep 'properties =.*[[:<:]]compute[[:>:]]' file
grep 'properties =.*\<compute\>' file
grep 'properties =.*\bcompute\b' file

Terrific, thank you so much.
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