This is a very interesting problem. Perhaps the best (=simpliest) solution is the one from Scrutinizer and it is quite idle musing to try something in one tool (sed) which could be done a lot easier in another. Still, just to satisfy my curiosity:
Several posters here have suggested variants of the following algorithm: replace every three characters with these characters plus an appended comma. Reverse before and after this:
This may work but it is interesting to try to solve it in sed alone. It is possible to set up a loop appending the rightmost character to holdspace until the pattern space is empty. This would effectively do the same as the rev utility.
But there is a much simplier way to achieve our goal. Let us first apply our algorithm without using the rev utility. The outcome, depending on the length of the number, would be one of the following three forms:
We can correct the first one by moving all the commata 2 places leftwards. The second variant can be corrected by moving the commata 1 place leftwards and the last line just has one superfluous comma in the end. Therefore:
Which will do the trick in sed alone. My curiosity is satisfied indeed.
bakunin
These 2 Users Gave Thanks to bakunin For This Post:
Hi,
I remember once seeing a way to get the left most string in a word.
Let's say: a="First.Second.Third" (separated by dot)
echo ${a#*.} shows --> Second.Third
echo ${a##*.} shows --> Third
How do I get the the left most string "First" Or "First.Second" ???
Tried to replace #... (2 Replies)
Hi guys,
I am not very experienced in writing ksh scripts and I am trying to write a piece of code that indicates if a given string contains only digits and no alphabet (upper or lower case). If i write it my way it would turn out to have a lot of comparisons.. :eek:
Thanks a lot in... (3 Replies)
Hi Experts,
I have called some.txt with the following content.
oracle HYRDSRVIHUB01 pts/0 TESTIHUB 07-JUN-10 CREATE TABLE
TESTIHUB PHONE ... (12 Replies)
I would like to search between two a string. I thought this would be easy. The is always at the beginning of a line.
The code:
gawk '/^/{d=$1},/searchstring/,/^(d+1)/'
or
gawk '/^/,/searchstring/,/^/'
did not return the desired result.
inputfile.txt
999 some text searchstring some... (6 Replies)
I have a awk file which consists of the follwoing code in file select.awk :
/xxx/ {
time = gensub(/xxx \*\*\*(.*)/, "\\1", "g")
printf("%s\n",time)
next
}
and an input file with the following file file.txt :-
xxx ***Wed May 2 18:00:00 CDT 2012
AAA AAAA AAAA xxx... (4 Replies)
Hi Guys,
I want to search for a specific file in a directory which have a "b" letter as the 3rd character in the name of the file.
For Example :
/abc/efg/ldbjfblkj.sh
/abc/efg/erublkd.sh
/abc/efg/eibueora.sh
/abc/efg/kfvnmnb.sh
Since we have 2 files with "b" as a 3rd character in... (5 Replies)
hello
i have file with 100k records and each one has certain value that starts at 28th column and certain value that starts at 88th column
e.g. 1st file
<25>1234567 ..... <88> 8573785485
i have aditional file with values which are related to value that starts at 88th column of the... (1 Reply)
Hello,
I have a log file with logs such as
01/05/2017 10:23:41 : file.log.38: database error, MODE=SINGLE, LEVEL=critical, STATE: 01170255 (mode main
how can i use perl to extract the 8-digit number below from the string
01170255
Thanks (7 Replies)
Discussion started by: james2009
7 Replies
LEARN ABOUT CENTOS
git-name-rev
GIT-NAME-REV(1) Git Manual GIT-NAME-REV(1)NAME
git-name-rev - Find symbolic names for given revs
SYNOPSIS
git name-rev [--tags] [--refs=<pattern>]
( --all | --stdin | <committish>... )
DESCRIPTION
Finds symbolic names suitable for human digestion for revisions given in any format parsable by git rev-parse.
OPTIONS --tags
Do not use branch names, but only tags to name the commits
--refs=<pattern>
Only use refs whose names match a given shell pattern.
--all
List all commits reachable from all refs
--stdin
Read from stdin, append "(<rev_name>)" to all sha1's of nameable commits, and pass to stdout
--name-only
Instead of printing both the SHA-1 and the name, print only the name. If given with --tags the usual tag prefix of "tags/" is also
omitted from the name, matching the output of git-describe more closely.
--no-undefined
Die with error code != 0 when a reference is undefined, instead of printing undefined.
--always
Show uniquely abbreviated commit object as fallback.
EXAMPLE
Given a commit, find out where it is relative to the local refs. Say somebody wrote you about that fantastic commit
33db5f4d9027a10e477ccf054b2c1ab94f74c85a. Of course, you look into the commit, but that only tells you what happened, but not the context.
Enter git name-rev:
% git name-rev 33db5f4d9027a10e477ccf054b2c1ab94f74c85a
33db5f4d9027a10e477ccf054b2c1ab94f74c85a tags/v0.99~940
Now you are wiser, because you know that it happened 940 revisions before v0.99.
Another nice thing you can do is:
% git log | git name-rev --stdin
GIT
Part of the git(1) suite
Git 1.8.3.1 06/10/2014 GIT-NAME-REV(1)