Sponsored Content
Top Forums Shell Programming and Scripting remove blank lines and merge lines in shell Post 302502638 by dvah on Tuesday 8th of March 2011 01:22:37 PM
Old 03-08-2011
MySQL

Quote:
Originally Posted by Corona688
How about this:
Code:
awk  'BEGIN { RS="" ; FS="\n" ; OFS="," } { print $1, $2 }' < csvrec.csv > out.csv

That works by
  • Splitting records based on blank lines (RS="")
  • Using the newline as the field separator, so $1 is line 1 and $2 is line 2
  • Using "," as the output field separator, so it adds an "," between the two when you print a,b
---------- Post updated at 12:16 PM ---------- Previous update was at 12:07 PM ----------

If you need an extra "," on the end you can just do print $1, $2, ""
It works partially good.

1. i've to implement this shell for hundreds of csv's, so i'm not quite sure on the number of lines for each record in these files. so print $1, $2 works well for two lines of record followed by a blank line. But this has to be dynamic.

2. It doesn't seem to add a extra delimiter to the end of each record, i.e before each blank line

Thanks!
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Remove blank lines

¿How can i remove blank lines between all lines in a long text file? Example WrongFile.txt : Line 1 Line 2 Line 3 CorrectFile.txt : Line 1 Line 2 Line 3 Thanks in advance :confused: (4 Replies)
Discussion started by: osymad
4 Replies

2. UNIX for Dummies Questions & Answers

How to count lines - ignoring blank lines and commented lines

What is the command to count lines in a files, but ignore blank lines and commented lines? I have a file with 4 sections in it, and I want each section to be counted, not including the blank lines and comments... and then totalled at the end. Here is an example of what I would like my... (6 Replies)
Discussion started by: kthatch
6 Replies

3. Shell Programming and Scripting

Remove all blank lines in shell or awk.

Hi there, I want to trim space between lines in unix. I have a file named abc.txt with 2,00,000 lines.But useful are only a few. Please tell me how to delete the blank lines.:o (1 Reply)
Discussion started by: tushar_tus
1 Replies

4. Shell Programming and Scripting

Shell script: Remove blank lines

Hi gurus, I have this file with blank lines in it. How do i remove them in shell? I tried these commands but not working: sed '/^ *$/d' or sed '/^$/d' Anybody has a better idea pls? Also there are lines which starts with a single space, how do we remove the space in those lines?... (3 Replies)
Discussion started by: gholdbhurg
3 Replies

5. Shell Programming and Scripting

remove blank lines

I have joined 2 files. Join command worked fine. but the result showing extra blank lines. I tried to remove blank spaces by using awk (-- -42 RS= ORS="\n\n" file.txt) and sed (sed '/^ *$/d' file.txt)commands but didn't remove any Any suggestions plz:D 123 tab ....... ......tab .......234... (3 Replies)
Discussion started by: repinementer
3 Replies

6. Shell Programming and Scripting

Remove blank lines

I really hope someone can help me with this. I have several php files from a forum that I run, that now for some reason have blank lines after every line. Is there an easy way to make a script that does the following: * If there are consecutive blank lines, delete all of them except one. * If... (9 Replies)
Discussion started by: KidCactus
9 Replies

7. Shell Programming and Scripting

Delete blank lines, if blank lines are more than one using shell

Hi, Consider a file named "testfile" The contents of file are as below first line added for test second line added for test third line added for test fourth line added for test fifth line added for test (5 Replies)
Discussion started by: anil8103
5 Replies

8. Shell Programming and Scripting

How to remove blank lines

Hi, I am facing a problem related to removing blank lines from a text document. Input Error 17-05-2011 11:01:15 VisualSVN Server 2.1 1001 The following information was included with the event: line3 line4 Error 17-05-2011 11:00:25 VisualSVN Server 2.1 ... (13 Replies)
Discussion started by: mayursingru
13 Replies

9. UNIX and Linux Applications

remove all blank lines

When I 'vi' my test file I see some blank lines. However once I do :set list to display hidden characters, I see the empty lines literally like this: ^I$ How do I remove them? I cannot find a regex to match them. (3 Replies)
Discussion started by: alexsuv
3 Replies

10. Shell Programming and Scripting

Remove Blank lines in VI

Hi, Which option is used to remove blank lines in VI (AIX). ? Regards, Siva (6 Replies)
Discussion started by: ksgnathan
6 Replies
pilot-addresses(1)					      General Commands Manual						pilot-addresses(1)

NAME
pilot-addresses - read and write address book databases to and from a Palm handheld device, such as those made from Palm, Handspring, Han- dera, TRGPro, Sony or other Palm Compatible Handheld PDA device SYNOPSIS
pilot-addresses -p <port> [-c category ] [-d category ] [-r file | -w file ] (Note that some options are not shown above) DESCRIPTION
pilot-addresses allows the user to read all entries in the Palm address book database, write new entries into the database, and delete a category or delete all entries in the database. TARGET DEVICE
The default serial device used to communicate with a Palm is /dev/pilot. If the environment variable $PILOTPORT is set, its value will override the default. A serial device specified on the command-line will be used regardless of any $PILOTPORT setting. OPTIONS
Several options exist, including... -p --port <port>, Use device file port to communicate with the Palm handheld device. If this is not specified, will look for the $PILOTPORT environ- ment variable. If both are not found, will fall back to /dev/pilot. -h --help Display help synopsis for pilot-addresses -v --version Display version of pilot-addresses -a Augments fields in address book records with additional information. The augmented information is placed before and separated from the field with a semi-colon, (;). Augmented information includes: category_name - placed in front of each record or ["Work" | "Home" | "Fax" | "Other" | "E-mail" | "Main" | "Pager" | "Mobile" ] - placed in front of each phone number field. Empty fields are not augmented. -c category Install records to category category by default. Normally pilot-addresses uses Unfiled as the default category. This option is over- ridden by the category specified in the record with the -a option. -d category Delete all records in the specified category before installing new records. -D Delete all address book records in all categories. Obviously, be very careful with this one. -e Escape all special characters with a backslash. This enables you to read and write entries with newline characters in a field or note. -q Causes pilot-addresses to be quiet and not prompt you to press the HotSync button. -r file Reads records from file and install them to the Palm address book database. (Use the -w file to get a template file for input records.) -t delim Include category in each record, use the delimiter specified to separate all fields of a record. Delimiters are specified as fol- lows: 3=tab, 2=;, 1=,. This overrides the default delimiter of comma between fields and semi-colon between a field's augmented information. (Please note that this may generate confusing results when used with the -a option.) -T Write a header line with field titles as the first line of the data file. -w file Get all address book records from the Palm address book database and writes them into file USAGE
The program will connect to a target device and port, prompt the user to HotSync, and perform the requested read or write operation speci- fied by the user. EXAMPLES
To write all address records in a Palm to the file addrbook.csv: pilot-addresses -w addrbook.csv or pilot-addresses -p /dev/irnine -w addrbook.csv To read the address book records in the file addrbook.csv and install them on a Palm: pilot-addresses -r addrbook.csv To read the address book records in the file addrbook.csv and place them into the Palm address book database category Special after first deleting all current records in the Special category on the palm: pilot-addresses -c Special -d Special -r addrbook.csv SEE ALSO
pilot-link(7) KNOWN BUGS
pilot-addresses has no known bugs. REPORTING BUGS
Report bugs at http://bugs.pilot-link.org/ AUTHOR
pilot-addresses originally written by Kenneth Albanowski, manual page was written by Robert Wittig <bob.wittig@gt.org>. Free Software Foundation Palm Computing Device Tools pilot-addresses(1)
All times are GMT -4. The time now is 12:10 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy