I want to be able to spot double spaces in code and then also replace it with a single space. Double spaces sometimes occur accidentally in code, but most often they are indents or seperate code from comments ("//"). In summary: I want to replace double spaces with single spaces where they do not appear at the beginning of the line and do not appear prior to "//".
How do I do this in for instance sed?
Thank you for your answer. Your code also replaces double spaces prior to the comment delimiter ("//"). So that the following:
Code:
this is some code // code comment
turns into the following
Code:
this is some code // code comment
In brief there are the following cases:
Code:
this is code line 1
this is code line 2 // code comment
this is code line 3 // there may be good reasons to keep the double space in the comment
this is code line 4 // triple spaces should turn into one space as well
and should turn into the following:
Code:
this is code line 1
this is code line 2 // code comment
this is code line 3 // there may be good reasons to keep the double space in the comment
this is code line 4 // triple spaces should turn into one space as well
[user@host ~]# cat input
this is code line 1
this is code line 1 // code comment
this is code line 2 // code comment
this is code line 3 // there may be good reasons to keep the double space in the comment
this is code line 4 // triple spaces should turn into one space as well
[user@host ~]#
[user@host ~]# perl -lne 'chomp; if (/^(\s*?)(\S[^\/]*?)$/ || /^(\s*?)(\S.*?)(\s*\/\/.*)$/) { $x=$1;$y=$2;$z=$3; $y=~s/ +/ /g; print "$x$y$z" }' input
this is code line 1
this is code line 1 // code comment
this is code line 2 // code comment
this is code line 3 // there may be good reasons to keep the double space in the comment
this is code line 4 // triple spaces should turn into one space as well
[user@host ~]#
This User Gave Thanks to balajesuri For This Post:
---------- Post updated at 17:34 ---------- Previous update was at 10:13 ----------
This problem is still vexing me. I believe there should be a simpler solution. In essence we are dealing with the following pattern:
Code:
[ ].*
a series of spaces
Code:
{code}
some code, with or without double / triple / etc spaces
Code:
[ ].*
(optionally) a series of spaces
Code:
// {comment}
(optionally) some comment with or without double / triple / etc spaces
The operation should be to leave 1, 3 and 4 alone and only replace the double spaces with single spaces from sub-pattern 2, the code. It should be possible to do this in a single sed statement.
Something like:
Code:
sed -e 's#\([ ].*\)\([a-z]*\)\([ ].*\)\(// .*\)#\1(s/ +/ /g \2)\3\4#' inputfile
I have pipe separated file with lots of blank spaces.
After using sed -e 's/ *| */|/g' this command ,its giving me output as
TT0000013101640|
HCAMBLAMCNB010|Jul 3 2012 11:14AM|
HARYANA|
Bangali Mohalla |
TCL-UBR|9368040005|9355264655|9218509220|NULL
... (5 Replies)
Hi ,
I want to go out of vi editor temporarily and execute a command in command prompt and again going back to the editor . Is it possible . Any help on this is really helpful.
1. Need to open vi
2. Temporarily come out and execute a command and go back to vi editor (6 Replies)
Consider my input string as "abc|b f g|bj gy"
I am expecting the output as "abc|bfg|bj gy".
Please let me know how to achieve this in unix?
Thanks (8 Replies)
I have a problem mounting images because of the spaces in the filenames. Does anyone know how to rename files by removing the spaces with the find command?
find Desktop/$dir -name "*.dmg" -print -exec ??? (4 Replies)
Hello All,
I am trying to remove all tabspaces and all blankspaces from my file using sed & awk, but not getting proper code. Please help me out.
My file is like this (<b> means one blank space, <t> means one tab space)-
$ cat file
NARESH<b><b><b>KUMAR<t><t>PRADHAN... (3 Replies)
I want a user to be able to paste in a string like "01 3F 20 1F" and have the script reformat it to "013F201F" to pass it on to the next step.
I was trying to figure it out with awk but wasnt working well.
Never mind, found answer. did not know about tr :) (7 Replies)
Hey,
I'm using the command from this thread https://www.unix.com/unix-dummies-questions-answers/590-converting-list-into-line.html
to convert vertical lines to horzontal lines. But I need to remove the spaces that is created. Unfortunately I can't figure out where the space is in the code..
I... (2 Replies)
Hi
I have a shell script that looks for running processes in order to kill them. The script (ksh) gets the PID of these processes using the following:
PROCS=`ps -fu ${USERID} | egrep "MONITOR" | grep -v grep | cut -d" " -f4`
However, I spotted an issue where PID's of different lengths... (3 Replies)
hey..
i had a problem with the unix command when i want to remove the white spaces in a string..i guess i cud do it with a sed command but i get an error when i give space in the square brackets..
string="nh hjh llk"
p=`echo $string | sed 's/ //g'`
i donno how to give space charater and... (2 Replies)
Hi I have an XML file. Which has spaces between different records....
current file( Has many lines, like this... I want to delete all the spaces between > and <, if there are only spaces between them)
input file
<xyzr> <abc>1234</xyzr> <aaa> <bbb> ayz mnz</bbb> <sen>KEA... (6 Replies)
06-08-2012
