Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Insert a newline in XML
Top Forums Shell Programming and Scripting Insert a newline in XML Post 302829679 by alister on Friday 5th of July 2013 02:24:41 PM
Old 07-05-2013
Quote:
Originally Posted by anbu23
Code:
$ sed "s/^<Message>/\\
&/" file

Since the shell does not need to expand anything with them, there's no reason to use double quotes.

Habitually using double quotes when shell expansion isn't intended will eventually lead to a problematic unintentional expansion (usually at some future time when you're stressed and making a quick edit).

Single quotes are also a bit more efficient, because the shell only needs to check if the current character is a single quote. Whereas when parsing a double quoted string, besides having to check if the current character is a double quote, the shell must watch for the beginning of an $-expansion (parameter substitution, command substitution, and arithmetic substitution), backtick command substitution, and backslashes which depending on what follows them may or may not be special. In some shells, you can add history expansion to the list.

Even in the case of your simple code, it has led to the unnecessary doubling of a backslash.
Code:
sed 's/^<Message>/\
&/' file

Regards,
Alister
This User Gave Thanks to alister For This Post:
anbu23
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

use regexp to insert newline within a line

I have successfully used regexp and sed to insert a newline before or after a line containing a matched pattern /WORD/. However, I want to insert a newline immediately following /WORD/ and not after the -line- containing the pattern matched. I can match a pattern, but it is matched via a wild card... (2 Replies)
Discussion started by: kpeirce
2 Replies

2. Shell Programming and Scripting

Insert two newline after some pattern

Hi, I need to insert two newline characters after matching of a pattern in each line of a file. Eg. If i have a file with contents as follows:- Now, i want output as follows :- i.e., I need to insert two newline characters after the occurance of pattern "</Message>>". Thnx... (1 Reply)
Discussion started by: DTechBuddy
1 Replies

3. Shell Programming and Scripting

How to enter a newline after every XML tag end?

Hi Guyz, I have an XML message in following format: I want my contents to be formatted in following order: i.e. I want a newline after every XML tag end. How to do this? Thnx in advance. (5 Replies)
Discussion started by: DTechBuddy
5 Replies

4. Shell Programming and Scripting

AWK Script Issue insert newline for a regular expression match

Hi , I am having an issue with the Awk script to insert newline for a regular expression match Having a file like this FILE1 #################### RXOER , RXERA , RXERC , RXERD .RXEA(RXBSN), RXERD , REXCD input RXEGT buffer RXETRY ####################### Want to match the RXE... (38 Replies)
Discussion started by: jaita
38 Replies

5. Shell Programming and Scripting

sed insert text without newline

Hi, I use sed to insert text at beginning of a file. But sed inserts a newline after my text that I do not need. For example, I want to insert "foo" at the beginning of my file: > cat myfile This is first line. > sed -i '1i\foo' myfile > cat myfile foo This is first line. ... (5 Replies)
Discussion started by: tdw
5 Replies

6. Shell Programming and Scripting

Script using Sed :Search all patterns & after the last Patter, insert a newLine with Comma Sep Value

I am trying to search the pattern "ARS (11)" and after the LAST pattern, i am trying to open new line and enter text using sed. My Existing Text file is Users.txtpaul, Paul Smith, Stevn Smiley, REQ000001, ARS (11) sam, Sam Martin, Stevn Smiley, REQ000001, ARS (11) mike, Mike Conway, Stevn... (8 Replies)
Discussion started by: evrurs
8 Replies

7. Shell Programming and Scripting

Insert new pattern in newline after the nth occurrence of a line pattern - Bash in Ubuntu 12.04

Hi, I am getting crazy after days on looking at it: Bash in Ubuntu 12.04.1 I want to do this: pattern="system /path1/file1 file1" new_pattern=" data /path2/file2 file2" file to edit: data.db - I need to search in the file data.db for the nth occurrence of pattern - pattern must... (14 Replies)
Discussion started by: Phil3759
14 Replies

8. Shell Programming and Scripting

How to insert new line in xml?

I have an xml like below and wanted to insert a new line between end of the tag and start of the new tag. <partyaddress><addressline1>gandhi stree</addressline1><city>hyderbad</city><state>AP</state><addressline1>xyz stree</addressline1><city>bangalore</city><state>Karnataka</state>... (6 Replies)
Discussion started by: D_Sethi
6 Replies

9. Shell Programming and Scripting

Insert newline when grep result is empty

Given a csv file with 40 columns with name, address, hometown etc. I use a bash command in 1 line which: 1. gets the address column and pipes that to 2. grep the first digit and everything that follows Command: awk -F ";" '{print $19}' /Users/jb/Desktop/ReorderTempTotal.csv | grep -o "\d.*"... (7 Replies)
Discussion started by: JBVeenstra
7 Replies

10. Shell Programming and Scripting

Insert a newline after match in files of specific name under some subdirectories?

Hi I'd like to add the newline: \tuser: nobody", or "<TAB>user: nobody to all files named: docker-compose.ymlin subfolders of pwd with names beginning with 10-20. Within these files, I'd like to find the line (there'll only be one) containing: command: celery workerNOTE: As far as... (2 Replies)
Discussion started by: duncanbetts
2 Replies

LEARN ABOUT REDHAT

ppmtosixel

ppmtosixel(1)						      General Commands Manual						     ppmtosixel(1)

NAME

       ppmtosixel - convert a portable pixmap into DEC sixel format

SYNOPSIS

       ppmtosixel [-raw] [-margin] [ppmfile]

DESCRIPTION

       Reads  a  portable  pixmap  as input.  Produces sixel commands (SIX) as output.	The output is formatted for color printing, e.g. for a DEC
       LJ250 color inkjet printer.

       If RGB values from the PPM file do not have maxval=100, the RGB values are rescaled.  A printer control header and a color assignment table
       begin the SIX file.  Image data is written in a compressed format by default.  A printer control footer ends the image file.

OPTIONS

       -raw   If  specified,  each  pixel  will  be explicitly described in the image file.  If -raw is not specified, output will default to com-
	      pressed format in which identical adjacent pixels are replaced by "repeat pixel" commands.  A raw file is often an order	of  magni-
	      tude larger than a compressed file and prints much slower.

       -margin
	      If  -margin  is not specified, the image will be start at the left margin (of the window, paper, or whatever).  If -margin is speci-
	      fied, a 1.5 inch left margin will offset the image.

PRINTING

       Generally, sixel files must reach the printer unfiltered.  Use the lpr -x option or cat filename > /dev/tty0?.

BUGS

       Upon rescaling, truncation of the least significant bits of RGB values may result in poor color conversion.  If the original PPM maxval was
       greater	than  100,  rescaling  also reduces the image depth.  While the actual RGB values from the ppm file are more or less retained, the
       color palette of the LJ250 may not match the colors on your screen.  This seems to be a printer limitation.

SEE ALSO

       ppm(5)

AUTHOR

       Copyright (C) 1991 by Rick Vinci.

								   26 April 1991						     ppmtosixel(1)
All times are GMT -4. The time now is 08:07 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy