Simple sed question

Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers Simple sed question
# 1  
Old 11-19-2002
Simple sed question

Is there an easier way to do the following:

echo "|||||||" | sed 's/||/|0|/g; s/||/|0|/g'
which would give the following

If it is not run twice it will not pick up the second occurance of the || and leave it empty as in
echo "|||||||" | sed 's/||/|0|/g'
which would give you

Very simple but the first solution is what I used. Any ideas or comments?

# 2  
Old 11-19-2002
Am I allowed to cheat? This will do precisely what you asked:
echo "|||||||" | sed 's/||/|0|0/g'

Smilie Smilie Smilie Smilie
# 3  
Old 11-19-2002
on the same lines...

echo "|||||||" | sed "s/|||/|0|0|0/g"

in a general case if you have n pipes in input,

you can use p pipes in the context address parts
and p "|0" pairs in the substitution string part...

p is such that n % p = 1

now excuse me for this trivia!! Smilie Smilie Smilie

# 4  
Old 11-20-2002
Perderabo & Vishnu

Thanks for the replies but my initial problem was that the number of bars "|" did vary in the data file so the pattern was not always the same.

Purely a question which was aked by another colluege after I gave him my solution and he said he is sure it could be done in a shorter command. However still awaiting his solution Smilie

Login or Register to Ask a Question

Previous Thread | Next Thread

10 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Simple SED Question

I don't understand this command behavior. echo "abc" |sed 's/a/&_&/' (4 Replies)
Discussion started by: Vartika18
4 Replies

2. Red Hat

Syslog.conf: looking for a simple answer on a simple question

Cheers! In /etc/syslog.conf, if an error type is not specified, is it logged anywhere (most preferable is it logged to /var/log/messages) or not? To be more precise I am interested in error and critical level messages. At default these errors are not specified in syslog.conf, and I need to... (6 Replies)
Discussion started by: dr1zzt3r
6 Replies

3. Shell Programming and Scripting

Simple sed script question

Script newbie, so I'm sure I'm missing something obvious here, but how come this simple script does not work? #!/bin/bash ... (3 Replies)
Discussion started by: KidCactus
3 Replies

4. Shell Programming and Scripting

simple sed question - replace from phrase to end of line

I have the following line an in input file I want to digest with sed and simple replace the bold part with a variable defined in my bash script. I can do this in several sed operations but I know there must be a way to do it in a single sed line. What is the syntax? Line in file:... (1 Reply)
Discussion started by: graysky
1 Replies

5. Shell Programming and Scripting

Simple sed question.

I have a log output with a format similar to this: a=1, b= 2 c=0, d= 45, e=100 ... and so on. I figure I can just use awk or something to pipe the file to sed, but I'm trying to replace all the values above with 0. I've tried: cat blah | sed 's/=\(.*\),/0/'but that didn't work. ... (6 Replies)
Discussion started by: throw_a_stick
6 Replies

6. Shell Programming and Scripting

simple sed question

How do I remove parentheses using sed? input ( output (4 Replies)
Discussion started by: streetfighter2
4 Replies

7. Shell Programming and Scripting

simple awk/sed/tr question

I have a file CREATE TABLE DDD_EXT --- 1000 ( val u1 val u1 ); CREATE TABLE dsdasd_EXT --- 1323 ( val u1 val u1 ); CREATE TABLE AAAAAA_EXT --- 1222 ( val u1 val u1 ); CREATE TABLE E_EXT --- 11 ( val u1 val u1 (2 Replies)
Discussion started by: jville
2 Replies

8. Shell Programming and Scripting

simple sed question

hi is it possible to cut this two semicolon separated sed commands echo "string2 string3 string1" | sed s'/string1//g;s/string2//g' output: " string3 " to just one sed command without semicolon? thanks in advance funksen (10 Replies)
Discussion started by: funksen
10 Replies

9. Shell Programming and Scripting

sed - simple question

Hello My file looks like that => 12.56 have then 7888778.2566 what 44454.54545 878787.66565 if else 4445.54545455 I want to change all '.' on ',' . I'm trying to do it with sed but I don't know chow to build regular expression to change 454.4466 on 454,4466 ? (13 Replies)
Discussion started by: scotty_123
13 Replies

10. UNIX for Dummies Questions & Answers

Ok simple question for simple knowledge...

Ok what is BSD exactly? I know its a type of open source but what is it exactly? (1 Reply)
Discussion started by: Corrail
1 Replies
Login or Register to Ask a Question