If I remember correctly, grep (and all its associated versions) accept -v
as an option which reports the entries in the list that don't match. Using
gref (which is given the name[s] of files) uses those files as a list of the
patterns to match.
From owner-freebsd-questi...@freebsd.org Thu Aug 12 05:36:27 2010
Date: Wed, 11 Aug 2010 18:00:22 -0500
To: freebsd-questions@freebsd.org
From: Jack L. Stone ja...@sage-american.com
Subject: Grepping a list of words
Kindly appreciate help with how to grep (or similar) a list of words
At 10:56 AM 8.12.2010 -0700, Chip Camden wrote:
Quoth Anonymous on Thursday, 12 August 2010:
Oliver Fromme o...@lurza.secnetix.de writes:
John Levine jo...@iecc.com wrote:
% egrep 'word1|word2|word3|...|wordn' filename.txt
Thanks for the replies. This suggestion won't do the
On Friday 13 August 2010 15:47:38 Jack L. Stone wrote:
The only thing it didn't do for me was the next step. My final objective
was to really determine the words in the word.file that were not in the
main.file. I figured finding matches would be easy and then could then
run a sort|uniq
At 04:01 PM 8.13.2010 +0200, Jonathan McKeown wrote:
On Friday 13 August 2010 15:47:38 Jack L. Stone wrote:
The only thing it didn't do for me was the next step. My final objective
was to really determine the words in the word.file that were not in the
main.file. I figured finding matches
Since I will have a need to run this check frequently, any suggestions for
a better approach are welcome.
sort -u and comm(1)?
sort is O(N log N) while grep is O(N)
Which is faster depends on the constant factors in each, but as the
data sets get bigger, the log N term will dominate. That
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
Thanks for any suggestions...
All the best,
Jack
(^_^)
Happy trails,
Jack L. Stone
System Admin
Sage-american
On Wed, Aug 11, 2010 at 06:00:22PM -0500, Jack L. Stone wrote:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
Something like this should do the trick:
egrep (word1|word2|word3) file
Dan
On Wed, Aug 11, 2010 at 06:00:22PM -0500, Jack L. Stone wrote:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
put the list in a file, and use grep -f
better, use the \ and \ markers on the
Jack L. Stone ja...@sage-american.com writes:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
Perhaps, `-e' option?
$ printf 'foo\nbar\n' | fgrep -e foo -e bar
foo
bar
On Wed, 11 Aug 2010 18:00:22 -0500
Jack L. Stone ja...@sage-american.com wrote:
Kindly appreciate help with how to grep (or similar) a list of words
to determine if any of them are in a file rather than grepping one
word at a time.
Use egrep
egrep (word1|word2) file
signature.asc
On 08/12/10 00:00, Jack L. Stone wrote:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
fgrep, aka grep -F
A snippet from man grep:
-F, --fixed-strings
Interpret
Jack L Stone writes:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
#v+
% egrep 'word1|word2|word3|...|wordn' filename.txt
#v-
'word1|word2|word3|...|wordn' is the regular expression, so
At 05:14 PM 8.12.2010 +0530, Ashish SHUKLA wrote:
Jack L Stone writes:
Kindly appreciate help with how to grep (or similar) a list of words to
determine if any of them are in a file rather than grepping one word at a
time.
#v+
% egrep 'word1|word2|word3|...|wordn' filename.txt
#v-
% egrep 'word1|word2|word3|...|wordn' filename.txt
Thanks for the replies. This suggestion won't do the job as the list of
words is very long, maybe 50-60. This is why I asked how to place them all
in a file. One reply dealt with using a file with egrep. I'll try that.
Gee, 50 words, that's
John Levine jo...@iecc.com wrote:
% egrep 'word1|word2|word3|...|wordn' filename.txt
Thanks for the replies. This suggestion won't do the job as the list of
words is very long, maybe 50-60. This is why I asked how to place them all
in a file. One reply dealt with using a file with
Oliver Fromme o...@lurza.secnetix.de writes:
John Levine jo...@iecc.com wrote:
% egrep 'word1|word2|word3|...|wordn' filename.txt
Thanks for the replies. This suggestion won't do the job as the list of
words is very long, maybe 50-60. This is why I asked how to place them
all
Quoth Anonymous on Thursday, 12 August 2010:
Oliver Fromme o...@lurza.secnetix.de writes:
John Levine jo...@iecc.com wrote:
% egrep 'word1|word2|word3|...|wordn' filename.txt
Thanks for the replies. This suggestion won't do the job as the list of
words is very long, maybe
Gee, 50 words, that's about a 300 character pattern, that's not a problem
for any shell or version of grep I know.
But reading the words from a file is equivalent and as you note most
likely easier to do.
The question is what is more efficient. This might be
important if that kind of grep
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