grep -P no longer works. How can I rewrite my searches?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty{ height:90px;width:728px;box-sizing:border-box;
}
64
It looks like the new version of OSX no longer supports grep -P and as such has made some of my scripts stop working.
var1=`grep -o -P '(?<=<st:italic>).*(?=</italic>)' file.txt`
I need to capture the grep to a variable and I need to use the zero width assertions, as well as K
var2=`grep -P -o '(property:)K.*d+(?=end)' file.txt`
Any alternatives would be greatly appreciated.
macos perl shell
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
|
show 5 more comments
64
It looks like the new version of OSX no longer supports grep -P and as such has made some of my scripts stop working.
var1=`grep -o -P '(?<=<st:italic>).*(?=</italic>)' file.txt`
I need to capture the grep to a variable and I need to use the zero width assertions, as well as K
var2=`grep -P -o '(property:)K.*d+(?=end)' file.txt`
Any alternatives would be greatly appreciated.
macos perl shell
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
7
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
Are you sure it's the-P? Mine has it.
– Kevin
May 20 '13 at 21:20
3
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
7
@AdrianFrühwirth OS X'sgrepactually changed fromgrep (GNU grep) 2.5.1in 10.7 togrep (BSD grep) 2.5.1-FreeBSDin 10.8. I guess it was because of GPL. The FreeBSDgrepis also based on GNUgrepand both versions ofgrepare from 2002.--labeland-u/--unix-byte-offetswere also removed in 10.8.-z/--decompress,-J/--bz2decompress,--exclude-dir,--include-dir,-S,-O, and-pwere added in 10.8.-Zchanged from--nullto--decompress.
– Lri
Apr 3 '14 at 13:41
2
The FreeBSDgrepthat comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah.time grep aa /usr/share/dict/words>/dev/nulltakes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.
– Lri
Apr 3 '14 at 17:17
|
show 5 more comments
64
64
64
26
It looks like the new version of OSX no longer supports grep -P and as such has made some of my scripts stop working.
var1=`grep -o -P '(?<=<st:italic>).*(?=</italic>)' file.txt`
I need to capture the grep to a variable and I need to use the zero width assertions, as well as K
var2=`grep -P -o '(property:)K.*d+(?=end)' file.txt`
Any alternatives would be greatly appreciated.
macos perl shell
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
It looks like the new version of OSX no longer supports grep -P and as such has made some of my scripts stop working.
var1=`grep -o -P '(?<=<st:italic>).*(?=</italic>)' file.txt`
I need to capture the grep to a variable and I need to use the zero width assertions, as well as K
var2=`grep -P -o '(property:)K.*d+(?=end)' file.txt`
Any alternatives would be greatly appreciated.
macos perl shell
macos perl shell
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
edited Feb 17 at 21:06
kugyousha
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
asked May 20 '13 at 20:59
kugyoushakugyousha
84621221
84621221
7
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
Are you sure it's the-P? Mine has it.
– Kevin
May 20 '13 at 21:20
3
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
7
@AdrianFrühwirth OS X'sgrepactually changed fromgrep (GNU grep) 2.5.1in 10.7 togrep (BSD grep) 2.5.1-FreeBSDin 10.8. I guess it was because of GPL. The FreeBSDgrepis also based on GNUgrepand both versions ofgrepare from 2002.--labeland-u/--unix-byte-offetswere also removed in 10.8.-z/--decompress,-J/--bz2decompress,--exclude-dir,--include-dir,-S,-O, and-pwere added in 10.8.-Zchanged from--nullto--decompress.
– Lri
Apr 3 '14 at 13:41
2
The FreeBSDgrepthat comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah.time grep aa /usr/share/dict/words>/dev/nulltakes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.
– Lri
Apr 3 '14 at 17:17
|
show 5 more comments
7
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
Are you sure it's the-P? Mine has it.
– Kevin
May 20 '13 at 21:20
3
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
7
@AdrianFrühwirth OS X'sgrepactually changed fromgrep (GNU grep) 2.5.1in 10.7 togrep (BSD grep) 2.5.1-FreeBSDin 10.8. I guess it was because of GPL. The FreeBSDgrepis also based on GNUgrepand both versions ofgrepare from 2002.--labeland-u/--unix-byte-offetswere also removed in 10.8.-z/--decompress,-J/--bz2decompress,--exclude-dir,--include-dir,-S,-O, and-pwere added in 10.8.-Zchanged from--nullto--decompress.
– Lri
Apr 3 '14 at 13:41
2
The FreeBSDgrepthat comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah.time grep aa /usr/share/dict/words>/dev/nulltakes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.
– Lri
Apr 3 '14 at 17:17
7
7
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
Are you sure it's the
-P? Mine has it.– Kevin
May 20 '13 at 21:20
Are you sure it's the
-P? Mine has it.– Kevin
May 20 '13 at 21:20
3
3
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
7
7
@AdrianFrühwirth OS X's
grep actually changed from grep (GNU grep) 2.5.1 in 10.7 to grep (BSD grep) 2.5.1-FreeBSD in 10.8. I guess it was because of GPL. The FreeBSD grep is also based on GNU grep and both versions of grep are from 2002. --label and -u / --unix-byte-offets were also removed in 10.8. -z / --decompress, -J / --bz2decompress, --exclude-dir, --include-dir, -S, -O, and -p were added in 10.8. -Z changed from --null to --decompress.– Lri
Apr 3 '14 at 13:41
@AdrianFrühwirth OS X's
grep actually changed from grep (GNU grep) 2.5.1 in 10.7 to grep (BSD grep) 2.5.1-FreeBSD in 10.8. I guess it was because of GPL. The FreeBSD grep is also based on GNU grep and both versions of grep are from 2002. --label and -u / --unix-byte-offets were also removed in 10.8. -z / --decompress, -J / --bz2decompress, --exclude-dir, --include-dir, -S, -O, and -p were added in 10.8. -Z changed from --null to --decompress.– Lri
Apr 3 '14 at 13:41
2
2
The FreeBSD
grep that comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah. time grep aa /usr/share/dict/words>/dev/null takes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.– Lri
Apr 3 '14 at 17:17
The FreeBSD
grep that comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah. time grep aa /usr/share/dict/words>/dev/null takes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.– Lri
Apr 3 '14 at 17:17
|
show 5 more comments
11 Answers
11
active
oldest
votes
54
If you want to do the minimal amount of work, change
grep -P 'PATTERN' file.txt
to
perl -nle'print if m{PATTERN}' file.txt
and change
grep -o -P 'PATTERN' file.txt
to
perl -nle'print $& while m{PATTERN}g' file.txt
So you get:
var1=`perl -nle'print $& while m{(?<=<st:italic>).*(?=</italic>)}g' file.txt`
var2=`perl -nle'print $& while m{(property:)K.*d+(?=end)}g' file.txt`
In your specific case, you can achieve simpler code with extra work.
var1=`perl -nle'print for m{<st:italic>(.*)</italic>}g' file.txt`
var2=`perl -nle'print for /property:(.*d+)end/g' file.txt`
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
@ironintention: add| tail -1to the end of the pipeline.
– Peter
Dec 10 '13 at 21:34
grepalways returns all matching lines (unless you use one of the options where it prints none at all). Anyway,if (/.../) { print $1; last; }will cause it to only print the first match.
– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:say $_->textContent for $doc->findnodes('//loc');)
– ikegami
Dec 23 '13 at 23:32
|
show 2 more comments
68
If your scripts are for your use only, you can install grep from homebrew-core using brew:
brew install grep --with-default-names
When you specify --with-default-names, it replaces the system grep (actually, puts the installed grep before the system one on the PATH).
The version installed by brew includes the -P option, so you don't need to change your scripts.
If you install without --with-default-names, then it's available as ggrep (GNU grep).
edited Jul 25 '17 at 9:20
lukad
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
this did not work on my system
– pepper
May 5 '14 at 18:40
3
@pepper what didn't work? Likely the path isn't set properly - what's the output ofwhich grep? Should be/usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!
– drevicko
May 7 '14 at 2:28
1
probably better to add/usr/local/binto the front of your PATH. Brew is supposed to set that up I believe? Did you use--default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.
– drevicko
May 7 '14 at 4:23
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
an alternative to--with-default-namesis to addalias grep='ggrep'to your bash profile and let brew dupes keep their prefix
– rymo
Sep 1 '15 at 19:37
|
show 2 more comments
12
Install ack and use it instead. Ack is a grep replacement written in Perl. It has full support for Perl regular expressions.
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ackis designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update yourPATHif necessary, you are good to go.
– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:ack -o '(property:)K.*d+(?=end)' file.txt(-omeans the same thing, but you don't need the-Pwith ack)
– Michael Carman
Jun 24 '16 at 14:43
add a comment |
8
OS X tends to provide BSD rather than GNU tools. It does come with egrep however, which is probably all you need to perform regex searches.
example: egrep 'fo+b?r' foobarbaz.txt
A snippet from the OSX grep man page:
grep is used for simple patterns and basic regular expressions (BREs); egrep can handle extended regular expressions (EREs).
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
add a comment |
6
use perl;
perl -ne 'print if /regex/' files ...
If you need more grep options (I see you would like -o at least) there are various pgrep implementations floating around the net, many of them in Perl.
If "almost Perl" is good enough, PCRE ships with pcregrep.
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
add a comment |
5
There is another alternative: pcregrep.
Pcregrep is a grep with Perl-compatible regular expressions. It has the exactly same usage as grep -P. So it will be compatible with your scripts.
It can be installed with homebrew:
brew install pcre
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
Error: No available formula for pcregrep
– Aaron Brager
Sep 22 '15 at 14:17
1
The brew cammand is:brew install pcre
– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
add a comment |
3
How about using the '-E' option? It works fine for me,
for example, if I want to check for a php_zip, php_xml, php_gd2 extension from php -m I use:
php -m | grep -E '(zip|xml|gd2)'
edited Dec 8 '16 at 2:17
zx485
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
add a comment |
2
Equivalent of the accepted answer, but without the requirement of the -P switch, which was not present on both machines I had available.
find . -type f -exec perl -nle 'print $& if m{rn}' {} ';' -exec perl -pi -e 's/rn/n/g' {} '+'
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
add a comment |
2
This one worked for me:
awk -F":" '/PATTERN/' file.txt
answered Aug 15 '16 at 19:57
petegampetegam
211
add a comment |
0
Another Perl solution for -P
var1=$( perl -ne 'print $1 if m#<st:italic>([^<]+)</st:italic># ' file.txt)
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
add a comment |
0
use the perl one-liner regex by passing the find output with a pipe.
I used lookbehind (get src links in html) and lookahead for " and passed the output of curl (html) to it.
bash-3.2# curl stackoverflow.com | perl -0777 -ne '$a=1;while(m/(?<=src=")(.*)(?=")/g){print "Match #".$a." "."$&n";$a+=1;}'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 239k 100 239k 0 0 1911k 0 --:--:-- --:--:-- --:--:-- 1919k
Match #1 //ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
Match #2 //cdn.sstatic.net/Js/stub.en.js?v=fb6157e02696
Match #3 https://ssum-sec.casalemedia.com/usermatch?s=183712&cb=https%3A%2F%2Fengine.adzerk.net%2Fudb%2F22%2Fsync%2Fi.gif%3FpartnerId%3D1%26userId%3D
Match #4 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/elasticsearch-2.0" class="post-tag" title="show questions tagged 'elasticsearch-2.0'" rel="tag">elasticsearch-2.0</a> <a href="/questions/tagged/elasticsearch-dsl" class="post-tag" title="show questions tagged 'elasticsearch-dsl'" rel="tag
Match #5 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/sharding" class="post-tag" title="show questions tagged 'sharding'" rel="tag">sharding</a> <a href="/questions/tagged/master" class="post-tag" title="show questions tagged 'master'" rel="tag
Match #6 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/linux" class="post-tag" title="show questions tagged 'linux'" rel="tag">linux</a> <a href="/questions/tagged/camera" class="post-tag" title="show questions tagged 'camera'" rel="tag
Match #7 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/firebase" class="post-tag" title="show questions tagged 'firebase'" rel="tag"><img src="//i.stack.imgur.com/5d55j.png" height="16" width="18" alt="" class="sponsor-tag-img">firebase</a> <a href="/questions/tagged/firebase-authentication" class="post-tag" title="show questions tagged 'firebase-authentication'" rel="tag
Match #8 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged 'ios'" rel="tag">ios</a> <a href="/questions/tagged/in-app-purchase" class="post-tag" title="show questions tagged 'in-app-purchase'" rel="tag">in-app-purchase</a> <a href="/questions/tagged/piracy-protection" class="post-tag" title="show questions tagged 'piracy-protection'" rel="tag
Match #9 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/unity3d" class="post-tag" title="show questions tagged 'unity3d'" rel="tag">unity3d</a> <a href="/questions/tagged/vr" class="post-tag" title="show questions tagged 'vr'" rel="tag
Match #10 http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif" alt="" class="dno
bash-3.2# date
Mon Oct 24 20:57:11 EDT 2016
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
add a comment |
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11 Answers
11
active
oldest
votes
11 Answers
11
active
oldest
votes
active
oldest
votes
active
oldest
votes
54
If you want to do the minimal amount of work, change
grep -P 'PATTERN' file.txt
to
perl -nle'print if m{PATTERN}' file.txt
and change
grep -o -P 'PATTERN' file.txt
to
perl -nle'print $& while m{PATTERN}g' file.txt
So you get:
var1=`perl -nle'print $& while m{(?<=<st:italic>).*(?=</italic>)}g' file.txt`
var2=`perl -nle'print $& while m{(property:)K.*d+(?=end)}g' file.txt`
In your specific case, you can achieve simpler code with extra work.
var1=`perl -nle'print for m{<st:italic>(.*)</italic>}g' file.txt`
var2=`perl -nle'print for /property:(.*d+)end/g' file.txt`
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
@ironintention: add| tail -1to the end of the pipeline.
– Peter
Dec 10 '13 at 21:34
grepalways returns all matching lines (unless you use one of the options where it prints none at all). Anyway,if (/.../) { print $1; last; }will cause it to only print the first match.
– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:say $_->textContent for $doc->findnodes('//loc');)
– ikegami
Dec 23 '13 at 23:32
|
show 2 more comments
54
If you want to do the minimal amount of work, change
grep -P 'PATTERN' file.txt
to
perl -nle'print if m{PATTERN}' file.txt
and change
grep -o -P 'PATTERN' file.txt
to
perl -nle'print $& while m{PATTERN}g' file.txt
So you get:
var1=`perl -nle'print $& while m{(?<=<st:italic>).*(?=</italic>)}g' file.txt`
var2=`perl -nle'print $& while m{(property:)K.*d+(?=end)}g' file.txt`
In your specific case, you can achieve simpler code with extra work.
var1=`perl -nle'print for m{<st:italic>(.*)</italic>}g' file.txt`
var2=`perl -nle'print for /property:(.*d+)end/g' file.txt`
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
@ironintention: add| tail -1to the end of the pipeline.
– Peter
Dec 10 '13 at 21:34
grepalways returns all matching lines (unless you use one of the options where it prints none at all). Anyway,if (/.../) { print $1; last; }will cause it to only print the first match.
– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:say $_->textContent for $doc->findnodes('//loc');)
– ikegami
Dec 23 '13 at 23:32
|
show 2 more comments
54
54
54
If you want to do the minimal amount of work, change
grep -P 'PATTERN' file.txt
to
perl -nle'print if m{PATTERN}' file.txt
and change
grep -o -P 'PATTERN' file.txt
to
perl -nle'print $& while m{PATTERN}g' file.txt
So you get:
var1=`perl -nle'print $& while m{(?<=<st:italic>).*(?=</italic>)}g' file.txt`
var2=`perl -nle'print $& while m{(property:)K.*d+(?=end)}g' file.txt`
In your specific case, you can achieve simpler code with extra work.
var1=`perl -nle'print for m{<st:italic>(.*)</italic>}g' file.txt`
var2=`perl -nle'print for /property:(.*d+)end/g' file.txt`
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
If you want to do the minimal amount of work, change
grep -P 'PATTERN' file.txt
to
perl -nle'print if m{PATTERN}' file.txt
and change
grep -o -P 'PATTERN' file.txt
to
perl -nle'print $& while m{PATTERN}g' file.txt
So you get:
var1=`perl -nle'print $& while m{(?<=<st:italic>).*(?=</italic>)}g' file.txt`
var2=`perl -nle'print $& while m{(property:)K.*d+(?=end)}g' file.txt`
In your specific case, you can achieve simpler code with extra work.
var1=`perl -nle'print for m{<st:italic>(.*)</italic>}g' file.txt`
var2=`perl -nle'print for /property:(.*d+)end/g' file.txt`
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
edited Dec 24 '18 at 23:54
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
answered May 20 '13 at 21:27
ikegamiikegami
268k11179406
268k11179406
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
@ironintention: add| tail -1to the end of the pipeline.
– Peter
Dec 10 '13 at 21:34
grepalways returns all matching lines (unless you use one of the options where it prints none at all). Anyway,if (/.../) { print $1; last; }will cause it to only print the first match.
– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:say $_->textContent for $doc->findnodes('//loc');)
– ikegami
Dec 23 '13 at 23:32
|
show 2 more comments
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
@ironintention: add| tail -1to the end of the pipeline.
– Peter
Dec 10 '13 at 21:34
grepalways returns all matching lines (unless you use one of the options where it prints none at all). Anyway,if (/.../) { print $1; last; }will cause it to only print the first match.
– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:say $_->textContent for $doc->findnodes('//loc');)
– ikegami
Dec 23 '13 at 23:32
1
1
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
This works great but it returns all matches as where the grep I used only returned the first match. any idea about how to return just the first match?
– kugyousha
May 22 '13 at 14:21
1
1
@ironintention: add
| tail -1 to the end of the pipeline.– Peter
Dec 10 '13 at 21:34
@ironintention: add
| tail -1 to the end of the pipeline.– Peter
Dec 10 '13 at 21:34
grep always returns all matching lines (unless you use one of the options where it prints none at all). Anyway, if (/.../) { print $1; last; } will cause it to only print the first match.– ikegami
Dec 11 '13 at 1:40
grep always returns all matching lines (unless you use one of the options where it prints none at all). Anyway, if (/.../) { print $1; last; } will cause it to only print the first match.– ikegami
Dec 11 '13 at 1:40
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
I used this to get out the urls of a sitemap - thanks mate, would not have made it without your post! perl -nle'print $1 if m{<loc>(.*)</loc>}' sitemap.xml
– Christian
Dec 23 '13 at 21:08
1
1
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:
say $_->textContent for $doc->findnodes('//loc');)– ikegami
Dec 23 '13 at 23:32
@Christian, Would only take 3 lines to do it with a proper XML parser such as XML::LibXML. (Key line:
say $_->textContent for $doc->findnodes('//loc');)– ikegami
Dec 23 '13 at 23:32
|
show 2 more comments
68
If your scripts are for your use only, you can install grep from homebrew-core using brew:
brew install grep --with-default-names
When you specify --with-default-names, it replaces the system grep (actually, puts the installed grep before the system one on the PATH).
The version installed by brew includes the -P option, so you don't need to change your scripts.
If you install without --with-default-names, then it's available as ggrep (GNU grep).
edited Jul 25 '17 at 9:20
lukad
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
this did not work on my system
– pepper
May 5 '14 at 18:40
3
@pepper what didn't work? Likely the path isn't set properly - what's the output ofwhich grep? Should be/usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!
– drevicko
May 7 '14 at 2:28
1
probably better to add/usr/local/binto the front of your PATH. Brew is supposed to set that up I believe? Did you use--default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.
– drevicko
May 7 '14 at 4:23
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
an alternative to--with-default-namesis to addalias grep='ggrep'to your bash profile and let brew dupes keep their prefix
– rymo
Sep 1 '15 at 19:37
|
show 2 more comments
68
If your scripts are for your use only, you can install grep from homebrew-core using brew:
brew install grep --with-default-names
When you specify --with-default-names, it replaces the system grep (actually, puts the installed grep before the system one on the PATH).
The version installed by brew includes the -P option, so you don't need to change your scripts.
If you install without --with-default-names, then it's available as ggrep (GNU grep).
edited Jul 25 '17 at 9:20
lukad
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
this did not work on my system
– pepper
May 5 '14 at 18:40
3
@pepper what didn't work? Likely the path isn't set properly - what's the output ofwhich grep? Should be/usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!
– drevicko
May 7 '14 at 2:28
1
probably better to add/usr/local/binto the front of your PATH. Brew is supposed to set that up I believe? Did you use--default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.
– drevicko
May 7 '14 at 4:23
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
an alternative to--with-default-namesis to addalias grep='ggrep'to your bash profile and let brew dupes keep their prefix
– rymo
Sep 1 '15 at 19:37
|
show 2 more comments
68
68
68
If your scripts are for your use only, you can install grep from homebrew-core using brew:
brew install grep --with-default-names
When you specify --with-default-names, it replaces the system grep (actually, puts the installed grep before the system one on the PATH).
The version installed by brew includes the -P option, so you don't need to change your scripts.
If you install without --with-default-names, then it's available as ggrep (GNU grep).
edited Jul 25 '17 at 9:20
lukad
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
If your scripts are for your use only, you can install grep from homebrew-core using brew:
brew install grep --with-default-names
When you specify --with-default-names, it replaces the system grep (actually, puts the installed grep before the system one on the PATH).
The version installed by brew includes the -P option, so you don't need to change your scripts.
If you install without --with-default-names, then it's available as ggrep (GNU grep).
edited Jul 25 '17 at 9:20
lukad
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
edited Jul 25 '17 at 9:20
lukad
10.7k33146
edited Jul 25 '17 at 9:20
lukad
10.7k33146
edited Jul 25 '17 at 9:20
lukad
10.7k33146
10.7k33146
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
answered Mar 28 '14 at 4:44
drevickodrevicko
8,57094877
8,57094877
this did not work on my system
– pepper
May 5 '14 at 18:40
3
@pepper what didn't work? Likely the path isn't set properly - what's the output ofwhich grep? Should be/usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!
– drevicko
May 7 '14 at 2:28
1
probably better to add/usr/local/binto the front of your PATH. Brew is supposed to set that up I believe? Did you use--default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.
– drevicko
May 7 '14 at 4:23
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
an alternative to--with-default-namesis to addalias grep='ggrep'to your bash profile and let brew dupes keep their prefix
– rymo
Sep 1 '15 at 19:37
|
show 2 more comments
this did not work on my system
– pepper
May 5 '14 at 18:40
3
@pepper what didn't work? Likely the path isn't set properly - what's the output ofwhich grep? Should be/usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!
– drevicko
May 7 '14 at 2:28
1
probably better to add/usr/local/binto the front of your PATH. Brew is supposed to set that up I believe? Did you use--default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.
– drevicko
May 7 '14 at 4:23
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
an alternative to--with-default-namesis to addalias grep='ggrep'to your bash profile and let brew dupes keep their prefix
– rymo
Sep 1 '15 at 19:37
this did not work on my system
– pepper
May 5 '14 at 18:40
this did not work on my system
– pepper
May 5 '14 at 18:40
3
3
@pepper what didn't work? Likely the path isn't set properly - what's the output of
which grep? Should be /usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!– drevicko
May 7 '14 at 2:28
@pepper what didn't work? Likely the path isn't set properly - what's the output of
which grep? Should be /usr/local/bin/grep. It;s a bit mean to downvote before you've checked carefully that there is a problem!– drevicko
May 7 '14 at 2:28
1
1
probably better to add
/usr/local/bin to the front of your PATH. Brew is supposed to set that up I believe? Did you use --default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.– drevicko
May 7 '14 at 4:23
probably better to add
/usr/local/bin to the front of your PATH. Brew is supposed to set that up I believe? Did you use --default-names? Anyway, glad it works (: Not sure about hacking around it, but I think the point system is one of the reasons this site is such a good resource.– drevicko
May 7 '14 at 4:23
1
1
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
yes I did use --default-names and brew. Not sure if putting /usr/local/bin in the front of your path is better than an alias, just an alternative
– pepper
May 7 '14 at 17:01
2
2
an alternative to
--with-default-names is to add alias grep='ggrep' to your bash profile and let brew dupes keep their prefix– rymo
Sep 1 '15 at 19:37
an alternative to
--with-default-names is to add alias grep='ggrep' to your bash profile and let brew dupes keep their prefix– rymo
Sep 1 '15 at 19:37
|
show 2 more comments
12
Install ack and use it instead. Ack is a grep replacement written in Perl. It has full support for Perl regular expressions.
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ackis designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update yourPATHif necessary, you are good to go.
– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:ack -o '(property:)K.*d+(?=end)' file.txt(-omeans the same thing, but you don't need the-Pwith ack)
– Michael Carman
Jun 24 '16 at 14:43
add a comment |
12
Install ack and use it instead. Ack is a grep replacement written in Perl. It has full support for Perl regular expressions.
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ackis designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update yourPATHif necessary, you are good to go.
– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:ack -o '(property:)K.*d+(?=end)' file.txt(-omeans the same thing, but you don't need the-Pwith ack)
– Michael Carman
Jun 24 '16 at 14:43
add a comment |
12
12
12
Install ack and use it instead. Ack is a grep replacement written in Perl. It has full support for Perl regular expressions.
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
Install ack and use it instead. Ack is a grep replacement written in Perl. It has full support for Perl regular expressions.
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
answered May 20 '13 at 21:27
Michael CarmanMichael Carman
28.3k865114
28.3k865114
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ackis designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update yourPATHif necessary, you are good to go.
– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:ack -o '(property:)K.*d+(?=end)' file.txt(-omeans the same thing, but you don't need the-Pwith ack)
– Michael Carman
Jun 24 '16 at 14:43
add a comment |
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ackis designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update yourPATHif necessary, you are good to go.
– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:ack -o '(property:)K.*d+(?=end)' file.txt(-omeans the same thing, but you don't need the-Pwith ack)
– Michael Carman
Jun 24 '16 at 14:43
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
I'd like to check this out but this is for work computers so we cannot install anything
– kugyousha
May 22 '13 at 14:23
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
@ironintention: If you can install Perl modules, you're good. Even if you can't add to the local Perl installation you can always use local::lib.
– Michael Carman
May 22 '13 at 18:58
ack is designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update your PATH if necessary, you are good to go.– tripleee
Mar 2 '14 at 8:23
ack is designed to be self-contained; you don't need to actually install it. If you can save a file, mark it as exectutable, and update your PATH if necessary, you are good to go.– tripleee
Mar 2 '14 at 8:23
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
Can you please the ack syntax that replaces the above
– William Entriken
Jun 23 '16 at 14:24
@FullDecent: It's almost identical:
ack -o '(property:)K.*d+(?=end)' file.txt (-o means the same thing, but you don't need the -P with ack)– Michael Carman
Jun 24 '16 at 14:43
@FullDecent: It's almost identical:
ack -o '(property:)K.*d+(?=end)' file.txt (-o means the same thing, but you don't need the -P with ack)– Michael Carman
Jun 24 '16 at 14:43
add a comment |
8
OS X tends to provide BSD rather than GNU tools. It does come with egrep however, which is probably all you need to perform regex searches.
example: egrep 'fo+b?r' foobarbaz.txt
A snippet from the OSX grep man page:
grep is used for simple patterns and basic regular expressions (BREs); egrep can handle extended regular expressions (EREs).
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
add a comment |
8
OS X tends to provide BSD rather than GNU tools. It does come with egrep however, which is probably all you need to perform regex searches.
example: egrep 'fo+b?r' foobarbaz.txt
A snippet from the OSX grep man page:
grep is used for simple patterns and basic regular expressions (BREs); egrep can handle extended regular expressions (EREs).
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
add a comment |
8
8
8
OS X tends to provide BSD rather than GNU tools. It does come with egrep however, which is probably all you need to perform regex searches.
example: egrep 'fo+b?r' foobarbaz.txt
A snippet from the OSX grep man page:
grep is used for simple patterns and basic regular expressions (BREs); egrep can handle extended regular expressions (EREs).
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
OS X tends to provide BSD rather than GNU tools. It does come with egrep however, which is probably all you need to perform regex searches.
example: egrep 'fo+b?r' foobarbaz.txt
A snippet from the OSX grep man page:
grep is used for simple patterns and basic regular expressions (BREs); egrep can handle extended regular expressions (EREs).
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
answered Mar 30 '16 at 13:36
nebulousnebulous
483513
483513
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
add a comment |
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
2
2
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
Direct invocation as egrep is deprecated. The same ability is also available as grep -E. It's... a sad shadow of Perl, lacking lookaround assertions, most of the backslash escapes, options, conditionals, etc :( Power users will hate it, but it does at least do the job.
– Dewi Morgan
Oct 11 '16 at 16:59
add a comment |
6
use perl;
perl -ne 'print if /regex/' files ...
If you need more grep options (I see you would like -o at least) there are various pgrep implementations floating around the net, many of them in Perl.
If "almost Perl" is good enough, PCRE ships with pcregrep.
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
add a comment |
6
use perl;
perl -ne 'print if /regex/' files ...
If you need more grep options (I see you would like -o at least) there are various pgrep implementations floating around the net, many of them in Perl.
If "almost Perl" is good enough, PCRE ships with pcregrep.
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
add a comment |
6
6
6
use perl;
perl -ne 'print if /regex/' files ...
If you need more grep options (I see you would like -o at least) there are various pgrep implementations floating around the net, many of them in Perl.
If "almost Perl" is good enough, PCRE ships with pcregrep.
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
use perl;
perl -ne 'print if /regex/' files ...
If you need more grep options (I see you would like -o at least) there are various pgrep implementations floating around the net, many of them in Perl.
If "almost Perl" is good enough, PCRE ships with pcregrep.
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
answered May 20 '13 at 21:03
tripleeetripleee
96.1k13133190
96.1k13133190
add a comment |
add a comment |
5
There is another alternative: pcregrep.
Pcregrep is a grep with Perl-compatible regular expressions. It has the exactly same usage as grep -P. So it will be compatible with your scripts.
It can be installed with homebrew:
brew install pcre
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
Error: No available formula for pcregrep
– Aaron Brager
Sep 22 '15 at 14:17
1
The brew cammand is:brew install pcre
– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
add a comment |
5
There is another alternative: pcregrep.
Pcregrep is a grep with Perl-compatible regular expressions. It has the exactly same usage as grep -P. So it will be compatible with your scripts.
It can be installed with homebrew:
brew install pcre
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
Error: No available formula for pcregrep
– Aaron Brager
Sep 22 '15 at 14:17
1
The brew cammand is:brew install pcre
– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
add a comment |
5
5
5
There is another alternative: pcregrep.
Pcregrep is a grep with Perl-compatible regular expressions. It has the exactly same usage as grep -P. So it will be compatible with your scripts.
It can be installed with homebrew:
brew install pcre
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
There is another alternative: pcregrep.
Pcregrep is a grep with Perl-compatible regular expressions. It has the exactly same usage as grep -P. So it will be compatible with your scripts.
It can be installed with homebrew:
brew install pcre
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
edited Mar 29 '16 at 2:38
Daniel Baird
1,7051217
1,7051217
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
answered Jul 27 '14 at 11:37
Gabor MartonGabor Marton
1,08721426
1,08721426
Error: No available formula for pcregrep
– Aaron Brager
Sep 22 '15 at 14:17
1
The brew cammand is:brew install pcre
– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
add a comment |
Error: No available formula for pcregrep
– Aaron Brager
Sep 22 '15 at 14:17
1
The brew cammand is:brew install pcre
– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
Error: No available formula for pcregrep– Aaron Brager
Sep 22 '15 at 14:17
Error: No available formula for pcregrep– Aaron Brager
Sep 22 '15 at 14:17
1
1
The brew cammand is:
brew install pcre– Martin
Feb 29 '16 at 9:12
The brew cammand is:
brew install pcre– Martin
Feb 29 '16 at 9:12
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
GaborMarton, I edited your answer to include @Martin 's correcting comment, and had to move the formatting around a bit to get over the minimum changes.
– Daniel Baird
Mar 29 '16 at 1:50
add a comment |
3
How about using the '-E' option? It works fine for me,
for example, if I want to check for a php_zip, php_xml, php_gd2 extension from php -m I use:
php -m | grep -E '(zip|xml|gd2)'
edited Dec 8 '16 at 2:17
zx485
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
add a comment |
3
How about using the '-E' option? It works fine for me,
for example, if I want to check for a php_zip, php_xml, php_gd2 extension from php -m I use:
php -m | grep -E '(zip|xml|gd2)'
edited Dec 8 '16 at 2:17
zx485
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
add a comment |
3
3
3
How about using the '-E' option? It works fine for me,
for example, if I want to check for a php_zip, php_xml, php_gd2 extension from php -m I use:
php -m | grep -E '(zip|xml|gd2)'
edited Dec 8 '16 at 2:17
zx485
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
How about using the '-E' option? It works fine for me,
for example, if I want to check for a php_zip, php_xml, php_gd2 extension from php -m I use:
php -m | grep -E '(zip|xml|gd2)'
edited Dec 8 '16 at 2:17
zx485
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
edited Dec 8 '16 at 2:17
zx485
15.3k133248
edited Dec 8 '16 at 2:17
zx485
15.3k133248
edited Dec 8 '16 at 2:17
zx485
15.3k133248
15.3k133248
answered Dec 8 '16 at 1:52
ZenCZenC
312
answered Dec 8 '16 at 1:52
ZenCZenC
312
answered Dec 8 '16 at 1:52
ZenCZenC
312
312
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
add a comment |
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
1
1
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
this works. Mac uses FreeBSD grep and Linux uses GNU grep...so this fix worked on my macOS sierra
– jimh
Jun 21 '17 at 19:15
add a comment |
2
Equivalent of the accepted answer, but without the requirement of the -P switch, which was not present on both machines I had available.
find . -type f -exec perl -nle 'print $& if m{rn}' {} ';' -exec perl -pi -e 's/rn/n/g' {} '+'
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
add a comment |
2
Equivalent of the accepted answer, but without the requirement of the -P switch, which was not present on both machines I had available.
find . -type f -exec perl -nle 'print $& if m{rn}' {} ';' -exec perl -pi -e 's/rn/n/g' {} '+'
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
add a comment |
2
2
2
Equivalent of the accepted answer, but without the requirement of the -P switch, which was not present on both machines I had available.
find . -type f -exec perl -nle 'print $& if m{rn}' {} ';' -exec perl -pi -e 's/rn/n/g' {} '+'
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
Equivalent of the accepted answer, but without the requirement of the -P switch, which was not present on both machines I had available.
find . -type f -exec perl -nle 'print $& if m{rn}' {} ';' -exec perl -pi -e 's/rn/n/g' {} '+'
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
answered May 18 '16 at 8:17
nuzzolilonuzzolilo
1,54811925
1,54811925
add a comment |
add a comment |
2
This one worked for me:
awk -F":" '/PATTERN/' file.txt
answered Aug 15 '16 at 19:57
petegampetegam
211
add a comment |
2
This one worked for me:
awk -F":" '/PATTERN/' file.txt
answered Aug 15 '16 at 19:57
petegampetegam
211
add a comment |
2
2
2
This one worked for me:
awk -F":" '/PATTERN/' file.txt
answered Aug 15 '16 at 19:57
petegampetegam
211
This one worked for me:
awk -F":" '/PATTERN/' file.txt
answered Aug 15 '16 at 19:57
petegampetegam
211
answered Aug 15 '16 at 19:57
petegampetegam
211
answered Aug 15 '16 at 19:57
petegampetegam
211
answered Aug 15 '16 at 19:57
petegampetegam
211
211
add a comment |
add a comment |
0
Another Perl solution for -P
var1=$( perl -ne 'print $1 if m#<st:italic>([^<]+)</st:italic># ' file.txt)
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
add a comment |
0
Another Perl solution for -P
var1=$( perl -ne 'print $1 if m#<st:italic>([^<]+)</st:italic># ' file.txt)
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
add a comment |
0
0
0
Another Perl solution for -P
var1=$( perl -ne 'print $1 if m#<st:italic>([^<]+)</st:italic># ' file.txt)
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
Another Perl solution for -P
var1=$( perl -ne 'print $1 if m#<st:italic>([^<]+)</st:italic># ' file.txt)
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
answered May 20 '13 at 21:09
Rory HunterRory Hunter
2,8271014
2,8271014
add a comment |
add a comment |
0
use the perl one-liner regex by passing the find output with a pipe.
I used lookbehind (get src links in html) and lookahead for " and passed the output of curl (html) to it.
bash-3.2# curl stackoverflow.com | perl -0777 -ne '$a=1;while(m/(?<=src=")(.*)(?=")/g){print "Match #".$a." "."$&n";$a+=1;}'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 239k 100 239k 0 0 1911k 0 --:--:-- --:--:-- --:--:-- 1919k
Match #1 //ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
Match #2 //cdn.sstatic.net/Js/stub.en.js?v=fb6157e02696
Match #3 https://ssum-sec.casalemedia.com/usermatch?s=183712&cb=https%3A%2F%2Fengine.adzerk.net%2Fudb%2F22%2Fsync%2Fi.gif%3FpartnerId%3D1%26userId%3D
Match #4 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/elasticsearch-2.0" class="post-tag" title="show questions tagged 'elasticsearch-2.0'" rel="tag">elasticsearch-2.0</a> <a href="/questions/tagged/elasticsearch-dsl" class="post-tag" title="show questions tagged 'elasticsearch-dsl'" rel="tag
Match #5 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/sharding" class="post-tag" title="show questions tagged 'sharding'" rel="tag">sharding</a> <a href="/questions/tagged/master" class="post-tag" title="show questions tagged 'master'" rel="tag
Match #6 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/linux" class="post-tag" title="show questions tagged 'linux'" rel="tag">linux</a> <a href="/questions/tagged/camera" class="post-tag" title="show questions tagged 'camera'" rel="tag
Match #7 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/firebase" class="post-tag" title="show questions tagged 'firebase'" rel="tag"><img src="//i.stack.imgur.com/5d55j.png" height="16" width="18" alt="" class="sponsor-tag-img">firebase</a> <a href="/questions/tagged/firebase-authentication" class="post-tag" title="show questions tagged 'firebase-authentication'" rel="tag
Match #8 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged 'ios'" rel="tag">ios</a> <a href="/questions/tagged/in-app-purchase" class="post-tag" title="show questions tagged 'in-app-purchase'" rel="tag">in-app-purchase</a> <a href="/questions/tagged/piracy-protection" class="post-tag" title="show questions tagged 'piracy-protection'" rel="tag
Match #9 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/unity3d" class="post-tag" title="show questions tagged 'unity3d'" rel="tag">unity3d</a> <a href="/questions/tagged/vr" class="post-tag" title="show questions tagged 'vr'" rel="tag
Match #10 http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif" alt="" class="dno
bash-3.2# date
Mon Oct 24 20:57:11 EDT 2016
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
add a comment |
0
use the perl one-liner regex by passing the find output with a pipe.
I used lookbehind (get src links in html) and lookahead for " and passed the output of curl (html) to it.
bash-3.2# curl stackoverflow.com | perl -0777 -ne '$a=1;while(m/(?<=src=")(.*)(?=")/g){print "Match #".$a." "."$&n";$a+=1;}'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 239k 100 239k 0 0 1911k 0 --:--:-- --:--:-- --:--:-- 1919k
Match #1 //ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
Match #2 //cdn.sstatic.net/Js/stub.en.js?v=fb6157e02696
Match #3 https://ssum-sec.casalemedia.com/usermatch?s=183712&cb=https%3A%2F%2Fengine.adzerk.net%2Fudb%2F22%2Fsync%2Fi.gif%3FpartnerId%3D1%26userId%3D
Match #4 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/elasticsearch-2.0" class="post-tag" title="show questions tagged 'elasticsearch-2.0'" rel="tag">elasticsearch-2.0</a> <a href="/questions/tagged/elasticsearch-dsl" class="post-tag" title="show questions tagged 'elasticsearch-dsl'" rel="tag
Match #5 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/sharding" class="post-tag" title="show questions tagged 'sharding'" rel="tag">sharding</a> <a href="/questions/tagged/master" class="post-tag" title="show questions tagged 'master'" rel="tag
Match #6 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/linux" class="post-tag" title="show questions tagged 'linux'" rel="tag">linux</a> <a href="/questions/tagged/camera" class="post-tag" title="show questions tagged 'camera'" rel="tag
Match #7 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/firebase" class="post-tag" title="show questions tagged 'firebase'" rel="tag"><img src="//i.stack.imgur.com/5d55j.png" height="16" width="18" alt="" class="sponsor-tag-img">firebase</a> <a href="/questions/tagged/firebase-authentication" class="post-tag" title="show questions tagged 'firebase-authentication'" rel="tag
Match #8 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged 'ios'" rel="tag">ios</a> <a href="/questions/tagged/in-app-purchase" class="post-tag" title="show questions tagged 'in-app-purchase'" rel="tag">in-app-purchase</a> <a href="/questions/tagged/piracy-protection" class="post-tag" title="show questions tagged 'piracy-protection'" rel="tag
Match #9 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/unity3d" class="post-tag" title="show questions tagged 'unity3d'" rel="tag">unity3d</a> <a href="/questions/tagged/vr" class="post-tag" title="show questions tagged 'vr'" rel="tag
Match #10 http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif" alt="" class="dno
bash-3.2# date
Mon Oct 24 20:57:11 EDT 2016
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
add a comment |
0
0
0
use the perl one-liner regex by passing the find output with a pipe.
I used lookbehind (get src links in html) and lookahead for " and passed the output of curl (html) to it.
bash-3.2# curl stackoverflow.com | perl -0777 -ne '$a=1;while(m/(?<=src=")(.*)(?=")/g){print "Match #".$a." "."$&n";$a+=1;}'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 239k 100 239k 0 0 1911k 0 --:--:-- --:--:-- --:--:-- 1919k
Match #1 //ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
Match #2 //cdn.sstatic.net/Js/stub.en.js?v=fb6157e02696
Match #3 https://ssum-sec.casalemedia.com/usermatch?s=183712&cb=https%3A%2F%2Fengine.adzerk.net%2Fudb%2F22%2Fsync%2Fi.gif%3FpartnerId%3D1%26userId%3D
Match #4 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/elasticsearch-2.0" class="post-tag" title="show questions tagged 'elasticsearch-2.0'" rel="tag">elasticsearch-2.0</a> <a href="/questions/tagged/elasticsearch-dsl" class="post-tag" title="show questions tagged 'elasticsearch-dsl'" rel="tag
Match #5 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/sharding" class="post-tag" title="show questions tagged 'sharding'" rel="tag">sharding</a> <a href="/questions/tagged/master" class="post-tag" title="show questions tagged 'master'" rel="tag
Match #6 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/linux" class="post-tag" title="show questions tagged 'linux'" rel="tag">linux</a> <a href="/questions/tagged/camera" class="post-tag" title="show questions tagged 'camera'" rel="tag
Match #7 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/firebase" class="post-tag" title="show questions tagged 'firebase'" rel="tag"><img src="//i.stack.imgur.com/5d55j.png" height="16" width="18" alt="" class="sponsor-tag-img">firebase</a> <a href="/questions/tagged/firebase-authentication" class="post-tag" title="show questions tagged 'firebase-authentication'" rel="tag
Match #8 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged 'ios'" rel="tag">ios</a> <a href="/questions/tagged/in-app-purchase" class="post-tag" title="show questions tagged 'in-app-purchase'" rel="tag">in-app-purchase</a> <a href="/questions/tagged/piracy-protection" class="post-tag" title="show questions tagged 'piracy-protection'" rel="tag
Match #9 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/unity3d" class="post-tag" title="show questions tagged 'unity3d'" rel="tag">unity3d</a> <a href="/questions/tagged/vr" class="post-tag" title="show questions tagged 'vr'" rel="tag
Match #10 http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif" alt="" class="dno
bash-3.2# date
Mon Oct 24 20:57:11 EDT 2016
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
use the perl one-liner regex by passing the find output with a pipe.
I used lookbehind (get src links in html) and lookahead for " and passed the output of curl (html) to it.
bash-3.2# curl stackoverflow.com | perl -0777 -ne '$a=1;while(m/(?<=src=")(.*)(?=")/g){print "Match #".$a." "."$&n";$a+=1;}'
% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
100 239k 100 239k 0 0 1911k 0 --:--:-- --:--:-- --:--:-- 1919k
Match #1 //ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js
Match #2 //cdn.sstatic.net/Js/stub.en.js?v=fb6157e02696
Match #3 https://ssum-sec.casalemedia.com/usermatch?s=183712&cb=https%3A%2F%2Fengine.adzerk.net%2Fudb%2F22%2Fsync%2Fi.gif%3FpartnerId%3D1%26userId%3D
Match #4 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/elasticsearch-2.0" class="post-tag" title="show questions tagged 'elasticsearch-2.0'" rel="tag">elasticsearch-2.0</a> <a href="/questions/tagged/elasticsearch-dsl" class="post-tag" title="show questions tagged 'elasticsearch-dsl'" rel="tag
Match #5 //i.stack.imgur.com/817gJ.png" height="16" width="18" alt="" class="sponsor-tag-img">elasticsearch</a> <a href="/questions/tagged/sharding" class="post-tag" title="show questions tagged 'sharding'" rel="tag">sharding</a> <a href="/questions/tagged/master" class="post-tag" title="show questions tagged 'master'" rel="tag
Match #6 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/linux" class="post-tag" title="show questions tagged 'linux'" rel="tag">linux</a> <a href="/questions/tagged/camera" class="post-tag" title="show questions tagged 'camera'" rel="tag
Match #7 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/firebase" class="post-tag" title="show questions tagged 'firebase'" rel="tag"><img src="//i.stack.imgur.com/5d55j.png" height="16" width="18" alt="" class="sponsor-tag-img">firebase</a> <a href="/questions/tagged/firebase-authentication" class="post-tag" title="show questions tagged 'firebase-authentication'" rel="tag
Match #8 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/ios" class="post-tag" title="show questions tagged 'ios'" rel="tag">ios</a> <a href="/questions/tagged/in-app-purchase" class="post-tag" title="show questions tagged 'in-app-purchase'" rel="tag">in-app-purchase</a> <a href="/questions/tagged/piracy-protection" class="post-tag" title="show questions tagged 'piracy-protection'" rel="tag
Match #9 //i.stack.imgur.com/tKsDb.png" height="16" width="18" alt="" class="sponsor-tag-img">android</a> <a href="/questions/tagged/unity3d" class="post-tag" title="show questions tagged 'unity3d'" rel="tag">unity3d</a> <a href="/questions/tagged/vr" class="post-tag" title="show questions tagged 'vr'" rel="tag
Match #10 http://pixel.quantserve.com/pixel/p-c1rF4kxgLUzNc.gif" alt="" class="dno
bash-3.2# date
Mon Oct 24 20:57:11 EDT 2016
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
answered Oct 25 '16 at 1:13
Rohit MalgaonkarRohit Malgaonkar
18314
18314
add a comment |
add a comment |
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7
how about installing gnu grep?
– Kent
May 20 '13 at 21:06
Are you sure it's the
-P? Mine has it.– Kevin
May 20 '13 at 21:20
3
@Kevin It was removed in 10.8.
– Lri
May 21 '13 at 17:08
7
@AdrianFrühwirth OS X's
grepactually changed fromgrep (GNU grep) 2.5.1in 10.7 togrep (BSD grep) 2.5.1-FreeBSDin 10.8. I guess it was because of GPL. The FreeBSDgrepis also based on GNUgrepand both versions ofgrepare from 2002.--labeland-u/--unix-byte-offetswere also removed in 10.8.-z/--decompress,-J/--bz2decompress,--exclude-dir,--include-dir,-S,-O, and-pwere added in 10.8.-Zchanged from--nullto--decompress.– Lri
Apr 3 '14 at 13:41
2
The FreeBSD
grepthat comes with OS X is from 2002, and wiki.freebsd.org/BSDgrep still says that "the only TODO item is improving performance", so yeah.time grep aa /usr/share/dict/words>/dev/nulltakes about 0.09 seconds with OS X's grep and about 0.01 seconds with a new GNU grep on repeated runs on my iMac.– Lri
Apr 3 '14 at 17:17