Re: sed question!
On 12Feb2017 20:06, bruce wrote: Got a quick sed question now.. test file:: head -2 sed.dat 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883 I always say "sed 2q" instead of "head -2", myself. want to simply truncate/search/replace the end of each line starting with the "," to get 228d98f0_f16a_11e6_9544_1ad613f05f7b 22b93712_f16a_11e6_a6ad_1ad613f05f7b the following isn't working sed -i 's/\,+\$//' sed.dat sed -i 's/\,+$//' sed.dat sed 's/,.*//' 1: You're in single quotes (generally desirable), so "," and "$" are not shell special characters and need no backslashes. 2: I don't know what your intend with the "+" is. Firstly, by default sed uses Basic Regular Expressions, which do not include "+". Secondly, "+" is a regexp character meaning "1 or more or the preceeding item", so you're saying "delete the first instance of one or more commas". Except that with BREs you're saying "delete the first comma followed by a plus" because "+" is not special. I'd test without the "-i" until you have things working. Cheers, Cameron Simpson ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
Re: sed question!
On Sun, Feb 12, 2017 at 08:06:28PM -0500, bruce wrote: > Hey guys. > > Thanks for the delete replies.. > > Got a quick sed question now.. > > test file:: > head -2 sed.dat > 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882 > 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883 > > want to simply truncate/search/replace the end of each line starting > with the "," > to get > > 228d98f0_f16a_11e6_9544_1ad613f05f7b > 22b93712_f16a_11e6_a6ad_1ad613f05f7b > > the following isn't working > sed -i 's/\,+\$//' sed.dat > > sed -i 's/\,+$//' sed.dat > > I'm sure it's simple/trivial... > Several problems. The sed's I know don't use extended RE syntax and '+' is a repetition character of extended RE. Some sed's might allow its use with the '-r' option. And maybe there are some sed's that do use extended RE. Comma is not typically a special character, so no need to escape. In pattern matching by the shell, the '*' repetition character does not reference the preceeding character. RE repetition characters (* in basic and + and ? in extended) always refer to repetitions of the preceeding character. Thus your pattern (if and extended RE) would be looking for a string of commas, NOT one comma followed by a string of any char. Try something like "sed -r -i 's/,[0-9]+$//'". or "sed -i 's/,[0-9]*$//'" or if uncertain they will be digits, but certain they will not be commas (i.e. you want to delete the last comma onward) try "sed -i 's/,[^,]*$//' Jon -- Jon H. LaBadie jo...@jgcomp.com ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
Re: sed question!
On 02/12/2017 08:06 PM, bruce wrote: > Hey guys. > > Thanks for the delete replies.. > > Got a quick sed question now.. > > test file:: > head -2 sed.dat > 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882 > 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883 > > want to simply truncate/search/replace the end of each line starting > with the "," > to get > > 228d98f0_f16a_11e6_9544_1ad613f05f7b > 22b93712_f16a_11e6_a6ad_1ad613f05f7b > > the following isn't working > sed -i 's/\,+\$//' sed.dat > > sed -i 's/\,+$//' sed.dat > > I'm sure it's simple/trivial... > > thoughts... > ___ > users mailing list -- users@lists.fedoraproject.org > To unsubscribe send an email to users-le...@lists.fedoraproject.org > How about: sed 's/,[0-9]\+$//' < sed.dat 228d98f0_f16a_11e6_9544_1ad613f05f7b 22b93712_f16a_11e6_a6ad_1ad613f05f7b which removes a comma followed by 1 or more digits from the end of the line. Or if you don't care what comes after the comma, then sed 's/,.*$//' < sed.dat will remove the comma and anything after it. signature.asc Description: OpenPGP digital signature ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
Re: sed question!
I'm a awk user.
cat sed.dat | awk -F"," '{print $1}'
or
awk -F"," '{print $1}' sed.dat
On Sun, Feb 12, 2017 at 5:06 PM, bruce wrote:
> Hey guys.
>
> Thanks for the delete replies..
>
> Got a quick sed question now..
>
> test file::
> head -2 sed.dat
> 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882
> 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883
>
> want to simply truncate/search/replace the end of each line starting
> with the ","
> to get
>
> 228d98f0_f16a_11e6_9544_1ad613f05f7b
> 22b93712_f16a_11e6_a6ad_1ad613f05f7b
>
> the following isn't working
> sed -i 's/\,+\$//' sed.dat
>
> sed -i 's/\,+$//' sed.dat
>
> I'm sure it's simple/trivial...
>
> thoughts...
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Re: sed question!
On Sun, Feb 12, 2017 at 08:06:28PM -0500, bruce wrote: > Hey guys. > > Thanks for the delete replies.. > > Got a quick sed question now.. > > test file:: > head -2 sed.dat > 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882 > 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883 > > want to simply truncate/search/replace the end of each line starting > with the "," > to get > > 228d98f0_f16a_11e6_9544_1ad613f05f7b > 22b93712_f16a_11e6_a6ad_1ad613f05f7b > > the following isn't working > sed -i 's/\,+\$//' sed.dat > > sed -i 's/\,+$//' sed.dat > > I'm sure it's simple/trivial... I'm far from a sed expert, but were I doing that I'd start with this, and move on from there as required: 's/,.*$//' which is: comma followed by zero or more of anything, followed by end of line. I think your expression says: one or more commas, followed by end of line. Fred -- Fred Smith -- fre...@fcshome.stoneham.ma.us - The eyes of the Lord are everywhere, keeping watch on the wicked and the good. - Proverbs 15:3 (niv) - ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
Re: sed question!
On 02/12/2017 05:06 PM, bruce wrote: the following isn't working sed -i 's/\,+$//' sed.da That would remove one or more commas, if they immediately precede the end of the line. You mean: sed 's/,.*$//' or: cut -f1 -d, ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
sed question!
Hey guys. Thanks for the delete replies.. Got a quick sed question now.. test file:: head -2 sed.dat 228d98f0_f16a_11e6_9544_1ad613f05f7b,1486934882 22b93712_f16a_11e6_a6ad_1ad613f05f7b,1486934883 want to simply truncate/search/replace the end of each line starting with the "," to get 228d98f0_f16a_11e6_9544_1ad613f05f7b 22b93712_f16a_11e6_a6ad_1ad613f05f7b the following isn't working sed -i 's/\,+\$//' sed.dat sed -i 's/\,+$//' sed.dat I'm sure it's simple/trivial... thoughts... ___ users mailing list -- users@lists.fedoraproject.org To unsubscribe send an email to users-le...@lists.fedoraproject.org
Re: sed question
Date: Thu, 21 Jul 2016 08:00:44 -0400
From: bruce
Subject: sed question
Hey guys..
Sed question.. should be simple, but after stack/net searches, lots or
trials.. can't seem to get it..
I've got a case
any thoughts on how to handle the parens would be cool!
just irks me that I couldn't see what I missed.
You cannot 'escape' the parens since '\(' and '\)' are defined 'codes'
like ^ & and $.
\( marks the start of an internal variable to be recorded, and \) marks
the end, substitution in the output side uses \1 (or \2,\3, or as many
as needed)
So sed -i -e "s#('txt')#'(\/dir\/txt)'#g" foo
should work.
NOTE: 1) sed inplace replacement
2) using extended grep
3) for clarity, the usual use of '/' for the 's' replacement is changed
to '#'
4) the global replacement marker, usually ', is changed to "
sed gets confused when dealing with mixed ' and " markers, I suspect
that this is your problem. So use the opposite marker outside the sed
replacement, when you have one inside.
--
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Re: sed question
On Thu, Jul 21, 2016 at 08:00:44AM -0400, bruce wrote:
> Hey guys..
>
> Sed question.. should be simple, but after stack/net searches, lots or
> trials.. can't seem to get it..
>
> I've got a case
>
> foo('txt')
> foo("txt")
>
> I'd like to have
>
> foo('/dir1/txt')
> foo("/dir1/txt")
>
> Now. I do a simple sed search/replace if it just focuses on the txt, but
> crafting a sed that uses the entire input as a search due to the parens
> '()' is a bit painful! Doing the sed using the \( for the ( wasn't quite
> successful!
>
> for just the txt..
>
> sed -i 's/'txt'/'dir1/txt'/' *files.dat
> sed -i 's/"txt"/"dir1/txt"/' *files.dat
>
> these work...
>
> any thoughts on how to handle the parens would be cool!
>
> just irks me that I couldn't see what I missed.
>
Two more possibilities (the short output lines were unchanged):
# search for entire string, replace only txt
$ sed '/foo(.txt.)/s,txt,/dir/txt,' tst.txt
foo('/dir/txt')
bar('txt')
foo('bar')
foo("/dir/txt")
bar("txt")
foo("bar")
# capture unchanging parts as \1 and \2 using grouping \( & \)
$ sed 's,\(foo(.\)txt\(.)\),\1/dir/txt\2,' tst.txt
foo('/dir/txt')
bar('txt')
foo('bar')
foo("/dir/txt")
bar("txt")
foo("bar")
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Re: sed question
thanks.. guys..
just a brain screwup.. should be ok now.. thanks for the eyeballs..
owe you guys oj!
On Thu, Jul 21, 2016 at 11:01 AM, Tethys wrote:
> On Thu, Jul 21, 2016 at 1:00 PM, bruce wrote:
>
> > Now. I do a simple sed search/replace if it just focuses on the txt, but
> > crafting a sed that uses the entire input as a search due to the parens
> '()'
> > is a bit painful! Doing the sed using the \( for the ( wasn't quite
> > successful!
>
> localhost:~% sed 's,^foo(\(.\)txt\(.\))$,foo(\1/dir1/txt\2),' << EOF
> foo('txt')
> foo("txt")
> EOF
> foo('/dir1/txt')
> foo("/dir1/txt")
>
> Tet
>
> --
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> right there. — Steve Gonedes
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Re: sed question
On Thu, Jul 21, 2016 at 1:00 PM, bruce wrote:
> Now. I do a simple sed search/replace if it just focuses on the txt, but
> crafting a sed that uses the entire input as a search due to the parens '()'
> is a bit painful! Doing the sed using the \( for the ( wasn't quite
> successful!
localhost:~% sed 's,^foo(\(.\)txt\(.\))$,foo(\1/dir1/txt\2),' << EOF
foo('txt')
foo("txt")
EOF
foo('/dir1/txt')
foo("/dir1/txt")
Tet
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right there. — Steve Gonedes
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Re: sed question
On 7/21/2016 8:26 AM, bruce wrote:
Hey Tudor, and others..
The test sed I posted works for doing a search/replace of the text
inside the parens...
> foo('txt')
> foo("txt")
however.. if i wanted to craft a sed that uses the entire
>>foo('txt')<< as the search.. then I run into the need to handle the
parens.. and that's the issue..
this doesn't work
sed -i 's/foo('txt')/foo('/dir1/txt') /' *files.dat
sed -i 's/foo\('txt'\)/foo\('/dir1/txt'\)/' *files.dat
If you swap out the apostrophes with quotation marks it should work -
Bash is what I think is getting in your way. On Fedora 23 I have the
following in a text file called test.txt:
The 'test' case for changing foo('txt') to foo("txt") without changing
bar('txt') to bar("txt") example.
I used the following sed command:
sed -e "s/foo('txt')/foo(\"txt\")/g" test.txt
This is the output:
The 'test' case for changing foo("txt") to foo("txt") without changing
bar('txt') to bar("txt") example.
Tom
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Re: sed question
hey todor..
I'll give it a try.. I was thinking it's the parens.. overlooked the fact
that i introduced '/' in the replace.. which might have caused issue.. but
the '/' was successful in the test with just the text inside the ()..
On Thu, Jul 21, 2016 at 8:59 AM, Todor Petkov
wrote:
> On Thu, Jul 21, 2016 at 3:26 PM, bruce wrote:
> > Hey Tudor, and others..
> >
> > The test sed I posted works for doing a search/replace of the text inside
> > the parens...
> >
> >> foo('txt')
> >> foo("txt")
> >
> > however.. if i wanted to craft a sed that uses the entire >>foo('txt')<<
> as
> > the search.. then I run into the need to handle the parens.. and that's
> the
> > issue..
> >
> > this doesn't work
> >
> > sed -i 's/foo('txt')/foo('/dir1/txt') /' *files.dat
> > sed -i 's/foo\('txt'\)/foo\('/dir1/txt'\)/' *files.dat
>
>
> cat /tmp/1.txt ; echo; sed -e
> "s#foo('txt')#foo('/dir1/txt')#;s#foo(\"txt\")#foo('/dir1/txt')#"
> /tmp/1.txt
> foo('txt')
> foo("txt")
>
> foo('/dir1/txt')
> foo('/dir1/txt')
>
>
> This?
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Re: sed question
On Thu, Jul 21, 2016 at 3:26 PM, bruce wrote:
> Hey Tudor, and others..
>
> The test sed I posted works for doing a search/replace of the text inside
> the parens...
>
>> foo('txt')
>> foo("txt")
>
> however.. if i wanted to craft a sed that uses the entire >>foo('txt')<< as
> the search.. then I run into the need to handle the parens.. and that's the
> issue..
>
> this doesn't work
>
> sed -i 's/foo('txt')/foo('/dir1/txt') /' *files.dat
> sed -i 's/foo\('txt'\)/foo\('/dir1/txt'\)/' *files.dat
cat /tmp/1.txt ; echo; sed -e
"s#foo('txt')#foo('/dir1/txt')#;s#foo(\"txt\")#foo('/dir1/txt')#"
/tmp/1.txt
foo('txt')
foo("txt")
foo('/dir1/txt')
foo('/dir1/txt')
This?
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Re: sed question
Hey Tudor, and others..
The test sed I posted works for doing a search/replace of the text inside
the parens...
> foo('txt')
> foo("txt")
however.. if i wanted to craft a sed that uses the entire >>foo('txt')<< as
the search.. then I run into the need to handle the parens.. and that's the
issue..
this doesn't work
sed -i 's/foo('txt')/foo('/dir1/txt') /' *files.dat
sed -i 's/foo\('txt'\)/foo\('/dir1/txt'\)/' *files.dat
thanks
On Thu, Jul 21, 2016 at 8:14 AM, Todor Petkov
wrote:
> On Thu, Jul 21, 2016 at 3:00 PM, bruce wrote:
> > Hey guys..
> >
> > Sed question.. should be simple, but after stack/net searches, lots or
> > trials.. can't seem to get it..
> >
> > I've got a case
> >
> > foo('txt')
> > foo("txt")
> >
> > I'd like to have
> >
> > foo('/dir1/txt')
> > foo("/dir1/txt")
> >
> > Now. I do a simple sed search/replace if it just focuses on the txt, but
> > crafting a sed that uses the entire input as a search due to the parens
> '()'
> > is a bit painful! Doing the sed using the \( for the ( wasn't quite
> > successful!
> >
> > for just the txt..
> >
> > sed -i 's/'txt'/'dir1/txt'/' *files.dat
> > sed -i 's/"txt"/"dir1/txt"/' *files.dat
> >
> > these work...
> >
> > any thoughts on how to handle the parens would be cool!
> >
> > just irks me that I couldn't see what I missed.
> >
> > thanks!
>
> Try like this:
>
> cat /tmp/1.txt
> foo('/dir1/txt')
>
> sed -e 's#'txt'#'dir1/txt'#' /tmp/1.txt
> foo('/dir1/dir1/txt')
>
> Or:
> sed -e 's/'txt'/'dir1\\/txt'/' /tmp/1.txt
>
> You need to escape the / in the replacement string.
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Re: sed question
On Thu, Jul 21, 2016 at 3:00 PM, bruce wrote:
> Hey guys..
>
> Sed question.. should be simple, but after stack/net searches, lots or
> trials.. can't seem to get it..
>
> I've got a case
>
> foo('txt')
> foo("txt")
>
> I'd like to have
>
> foo('/dir1/txt')
> foo("/dir1/txt")
>
> Now. I do a simple sed search/replace if it just focuses on the txt, but
> crafting a sed that uses the entire input as a search due to the parens '()'
> is a bit painful! Doing the sed using the \( for the ( wasn't quite
> successful!
>
> for just the txt..
>
> sed -i 's/'txt'/'dir1/txt'/' *files.dat
> sed -i 's/"txt"/"dir1/txt"/' *files.dat
>
> these work...
>
> any thoughts on how to handle the parens would be cool!
>
> just irks me that I couldn't see what I missed.
>
> thanks!
Try like this:
cat /tmp/1.txt
foo('/dir1/txt')
sed -e 's#'txt'#'dir1/txt'#' /tmp/1.txt
foo('/dir1/dir1/txt')
Or:
sed -e 's/'txt'/'dir1\\/txt'/' /tmp/1.txt
You need to escape the / in the replacement string.
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sed question
Hey guys..
Sed question.. should be simple, but after stack/net searches, lots or
trials.. can't seem to get it..
I've got a case
foo('txt')
foo("txt")
I'd like to have
foo('/dir1/txt')
foo("/dir1/txt")
Now. I do a simple sed search/replace if it just focuses on the txt, but
crafting a sed that uses the entire input as a search due to the parens
'()' is a bit painful! Doing the sed using the \( for the ( wasn't quite
successful!
for just the txt..
sed -i 's/'txt'/'dir1/txt'/' *files.dat
sed -i 's/"txt"/"dir1/txt"/' *files.dat
these work...
any thoughts on how to handle the parens would be cool!
just irks me that I couldn't see what I missed.
thanks!
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Re: sed question??
On 06Jun2015 21:53, bruce wrote: Evening.. Morning... As a test, the following is an attempt to replace "text" from a test file with "text" from an external file. aa=$(cat www1.txt) BTW, this can be written: aa=$(< www1.txt) sed -i "s*#\tISSUES/NOTES::*$aa*g" foo.py1 When I check the foo.py1 file, I get "$aa" in the file, instead of the replacement text. Are you sure you used the exact command above? If you have used single quote I would have expected such a result, but not with double quotes. The test is using replacement delimeters for the sed, as the replacement text has slashes... I'm fond of ^G for this purpose:-) thanks for any pointers. When debugging sed scripts and other fiddly shell commands it is often useful to trace the actual executed command, thus: ( set -x; sed -i "s*#\tISSUES/NOTES::*$aa*g" foo.py1 ) which will should the issued sed command, after the shell has done its mangling. Cheers, Cameron Simpson -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
sed question??
Evening.. As a test, the following is an attempt to replace "text" from a test file with "text" from an external file. aa=$(cat www1.txt) sed -i "s*#\tISSUES/NOTES::*$aa*g" foo.py1 When I check the foo.py1 file, I get "$aa" in the file, instead of the replacement text. The test is using replacement delimeters for the sed, as the replacement text has slashes... thanks for any pointers. -- users mailing list users@lists.fedoraproject.org To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Fedora Code of Conduct: http://fedoraproject.org/code-of-conduct Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines Have a question? Ask away: http://ask.fedoraproject.org
