Re: a simple question about grep
Thank you for all the great solutions! Because of my extremely limited *nix knowledge, I'd use the approach of two grep's in a pipeline, such as the one grep '^\*' yourFile | grep -v '^\*INDICATOR' suggested by Michael, as it's simple to understand and easy to memorize. Thank you again. Zhao ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
On 9/6/07, Kent Johnson [EMAIL PROTECTED] wrote: Tom Buskey wrote: On 9/6/07, *G.O.* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: egrep ^\*[^INDICATOR] filename.txt That excludes lines beginning with * and any of the characters INDCATOR, i.e. *N, *D, etc will all be excluded. That didn't work for me, but this did: egrep '^\*[^I][^N][^I][^D][^I][^C][^A][^T][^O][^R]' filename.txt That will exclude a line that matches INDICATOR at any character, for example *aN You're right. perhaps this: egrep -P ^\*(?!INDICATOR) filename.txt GNU egrep 2.5.1 doesn't work: $ cat z *INDICATOR name1 zip1 geoid gender location *INDICATOR name2 zip2 *geoid gender location INDICATOR name3 zip3 *district court $ egrep '^\*(?!INDICATOR)' z $ No output. ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
Bill Ricker wrote: Or, if you only have an old grep, but do have Perl, the following should work: The Andy and the ack project have built a better grep with perl. Cool. By default ack ignores plain text files, so you have to tell it to include them even when explicitly specifying the file. Here is an ack command that solves the OP's problem: ack --text '^\*(?!INDICATOR)' myfile.txt Kent ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
On 9/7/07, Tom Buskey [EMAIL PROTECTED] wrote: egrep -P ^\*(?!INDICATOR) filename.txt GNU egrep 2.5.1 doesn't work: $ egrep '^\*(?!INDICATOR)' z $ You need to specify -P (or --perl) to turn on support for Perl regular expression extensions.Otherwise it will interpret the (? as... hmmm, to tell the truth, I'm not sure what that'll do. I don't think that's valid traditional regexp syntax. In any event, it won't work. Hmmm, for that matter, it doesn't seem to like egrep -P. I guess that's because egrep is basically just the same thing as grep -E, and grep -E -P is invalid. So try grep -P. On a CentOS 5.0 box: $ grep '^\*(?!INDICATOR)' sample $ grep -P '^\*(?!INDICATOR)' sample *geoid gender location *district court $ rpm -q grep grep-2.5.1-54.2.el5 $ -- Ben ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
Will if you're going to go into 3-letter tools that start with 'a'
that can do the requested task, then I'm just going to have to tell
everyone how to do it with awk
awk '/^\*/ !/^\*INDICATOR/ { print $0 }' file
awk takes a pattern and then a set of things to do with lines that
match that pattern. So my pattern says line starts with '*' AND lines
does NOT start with '*INDICATOR'. Lines that match get processed by
the curly braces, which in this case prints out the entire line ($0 in
awk parlance)
-Shawn
On 9/7/07, Bill Ricker [EMAIL PROTECTED] wrote:
Or, if you only have an old grep, but do have Perl, the following should
work:
The Andy and the ack project have built a better grep with perl.
http://perladvent.pm.org/2006/5/
search.cpan.org/~petdance/ack/ack
petdance.com/ack/
ack is pure Perl, so consistent across all platforms. Command name is
25% shorter. :-) Heck, it's 50% shorter compared to grep -r.
use.perl.org/~petdance/journal/31763
http://www.youtube.com/watch?v=G1ynTV_E-5s [Andy petdance giving
ack Lighting talk at OSCON 2007, 9min]
http://www.perlfoundation.org/perl5/index.cgi?ack
Disclaimer - I have been known to contribute a patch to ack once in
a blue moon.
--
Bill
[EMAIL PROTECTED] [EMAIL PROTECTED]
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Re: a simple question about grep
grep '^\*' yourFile | grep -v '^\*INDICATOR' ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
egrep '^\*' FILE | egrep -v '^\*INDICATOR' I'm not sure how you'd combine them into one REGXP. I'm sure there's a better way in perl (GNU egrep will do perl with -P) On 9/6/07, Jerry [EMAIL PROTECTED] wrote: Hi, I have a text file whose content looks like below: *INDICATOR name1 zip1 geoid gender location *INDICATOR name2 zip2 *geoid gender location INDICATOR name3 zip3 *district court I want to pick up all lines starting with * but no INDICATOR followed. So for the example above, I want to pick up the following 2 lines: (the 3rd line) *geoid gender location (the last line) *district court How to construct regular expression with grep as a one-line command to achieve this goal? Or any other simple solutions? Thank you! Zhao ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
I want to pick up all lines starting with * but no INDICATOR followed. I'd double-grep it, but i'm not infront of a *nix box to check grep -i * | grep -v *INDICATOR filename or something to that effect. -- ~ * ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
egrep ^\*[^INDICATOR] filename.txt gurhan On 9/6/07, Jerry [EMAIL PROTECTED] wrote: Hi, I have a text file whose content looks like below: *INDICATOR name1 zip1 geoid gender location *INDICATOR name2 zip2 *geoid gender location INDICATOR name3 zip3 *district court I want to pick up all lines starting with * but no INDICATOR followed. So for the example above, I want to pick up the following 2 lines: (the 3rd line) *geoid gender location (the last line) *district court How to construct regular expression with grep as a one-line command to achieve this goal? Or any other simple solutions? Thank you! Zhao ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
On 9/6/07, G.O. [EMAIL PROTECTED] wrote: egrep ^\*[^INDICATOR] filename.txt gurhan That didn't work for me, but this did: egrep '^\*[^I][^N][^I][^D][^I][^C][^A][^T][^O][^R]' filename.txt On 9/6/07, Jerry [EMAIL PROTECTED] wrote: Hi, I have a text file whose content looks like below: *INDICATOR name1 zip1 geoid gender location *INDICATOR name2 zip2 *geoid gender location INDICATOR name3 zip3 *district court I want to pick up all lines starting with * but no INDICATOR followed. So for the example above, I want to pick up the following 2 lines: (the 3rd line) *geoid gender location (the last line) *district court How to construct regular expression with grep as a one-line command to achieve this goal? Or any other simple solutions? Thank you! Zhao ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/ ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
Tom Buskey wrote: On 9/6/07, *G.O.* [EMAIL PROTECTED] mailto:[EMAIL PROTECTED] wrote: egrep ^\*[^INDICATOR] filename.txt That excludes lines beginning with * and any of the characters INDCATOR, i.e. *N, *D, etc will all be excluded. That didn't work for me, but this did: egrep '^\*[^I][^N][^I][^D][^I][^C][^A][^T][^O][^R]' filename.txt That will exclude a line that matches INDICATOR at any character, for example *aN perhaps this: egrep -P ^\*(?!INDICATOR) filename.txt Kent ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
On 9/6/07, Kent Johnson [EMAIL PROTECTED] wrote: perhaps this: egrep -P ^\*(?!INDICATOR) filename.txt Assuming your grep supports the Perl regular expression extensions (a useful thing to have), that should work. Or, if you only have an old grep, but do have Perl, the following should work: perl -pe '/^\*(?!INDICATOR)/ and print' filename.txt Otherwise, I agree with what other suggested, using two grep's in a pipeline. -- Ben ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
Re: a simple question about grep
Or, if you only have an old grep, but do have Perl, the following should work: The Andy and the ack project have built a better grep with perl. http://perladvent.pm.org/2006/5/ search.cpan.org/~petdance/ack/ack petdance.com/ack/ ack is pure Perl, so consistent across all platforms. Command name is 25% shorter. :-) Heck, it's 50% shorter compared to grep -r. use.perl.org/~petdance/journal/31763 http://www.youtube.com/watch?v=G1ynTV_E-5s [Andy petdance giving ack Lighting talk at OSCON 2007, 9min] http://www.perlfoundation.org/perl5/index.cgi?ack Disclaimer - I have been known to contribute a patch to ack once in a blue moon. -- Bill [EMAIL PROTECTED] [EMAIL PROTECTED] ___ gnhlug-discuss mailing list gnhlug-discuss@mail.gnhlug.org http://mail.gnhlug.org/mailman/listinfo/gnhlug-discuss/
