Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: finding first instance
Top Forums UNIX for Dummies Questions & Answers finding first instance Post 26147 by peter.herlihy on Monday 12th of August 2002 07:00:05 PM
Old 08-12-2002
Okay...so if I have this right, basically the same as the original question I asked. This will give you the entire row where col1 and col2 together are unique.

i.e.

a,3,xxx
a,3,yyy
a,4,ccc
a,5,ccc
a,5,fff

Will give you:

a,3,xxx
a,4,ccc
a,5,ccc

Code:
awk ' 
{ 
max=11; 
line=substr($0,0,max) ; 
firstcol=substr(line,0,3) ; 
secondcol=substr(line,5,2); 
thirdcol=substr(line,6,1) 
}
{
if ( firstcol != field1 || secondcol != field2 )
{ print firstcol secondcol thirdcol ; field1 = firstcol; field2 = secondcol }
' input_file > output_file

Basically field1 and field2 start empty get set with the first pariing of col1 and 2 - and prints the 3 cols. Then it compares with the next row and where either are different it prints the three cols.

I haven't tried this code but it hould be good.
 

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

Copy Db Instance

I need to copy my Live Db Instance to my Test Db Instance Can somebody please tell me the easiest way to go about this It is an Informix Database running on HP-UX Thanks (0 Replies)
Discussion started by: cobdeng
0 Replies

2. Linux

OTRS instance

hi frnds here i m trying to configure OTRS instance but i m getting the following error message while runnning through browser. I m writing the following http://192.168.1.55:8080/otrs2/index.pl " #!/usr/bin/perl -w... (7 Replies)
Discussion started by: naik_mit
7 Replies

3. Shell Programming and Scripting

Single Instance

Hi, I have a script. I want only one instance of the script to be running at any point of the time. How can I do it. what would be the exact format of the ps command for doing this. For example the name of my script is "Inst.sh" Thanx in advance (2 Replies)
Discussion started by: sendhil
2 Replies

4. Shell Programming and Scripting

finding duplicate files by size and finding pattern matching and its count

Hi, I have a challenging task,in which i have to find the duplicate files by its name and size,then i need to take anyone of the file.Then i need to open the file and find for more than one pattern and count of that pattern. Note:These are the samples of two files,but i can have more... (2 Replies)
Discussion started by: jerome Sukumar
2 Replies

5. Shell Programming and Scripting

replace first instance(not first instance in line)

Alright, I think I know what I am doing with sed(which probably means I don't). But I cant figure out how to replace just the first occurance of a string. I have tried sed, ed, and grep but can't seem to figure it out. If you have any suggestions I am open to anything! (3 Replies)
Discussion started by: IronHorse7
3 Replies

6. Shell Programming and Scripting

matching first instance of FS

Hi All, I have a property in a file as: property=value=a If I use FS="=" then I want only first = to be considered as field separator and remaining as value echo -e "property=value=a" | awk -F= '{print $2}' ie my $2 should be value=a Can anyone please help me with this. I need it in... (3 Replies)
Discussion started by: gurukottur
3 Replies

7. Shell Programming and Scripting

What does : do in this instance

Guys please see below functions to return a status depending on user input. Both seem to work the same. The second way has a : line which i can't understand or see in a ksh manual anywhere. Instead of doing the variable change if its empty on this line the first function simply does it on the... (7 Replies)
Discussion started by: lavascript
7 Replies

8. Red Hat

Apache instance

Hi , Maximum How many instances of apache can we run in one box? (2 Replies)
Discussion started by: krish4linux
2 Replies

9. Shell Programming and Scripting

Keep the last instance of the record

Hi All, I have a input file like 1| abc 1| abcd 1| abcde 2| abc 2| abcd 3| abcde I want the output like 1| abcde 2| abcde Any help would be highly appreciated. Thanks in advance. (9 Replies)
Discussion started by: lrkp
9 Replies

10. UNIX for Advanced & Expert Users

Grep the only instance name

Hi, I want to get the only application name from the server. Ex: if i give $ ps -ef | grep bw. It will show all BW process with entire path. It will little confuse to list out the process. Can anyone have syntax to get only the instance name. I need this for be, hawk,ems also. Please... (2 Replies)
Discussion started by: ckchelladurai
2 Replies

LEARN ABOUT DEBIAN

lp-grab-attachments

GRAB-ATTACHMENTS(1)					      General Commands Manual					       GRAB-ATTACHMENTS(1)

NAME

       grab-attachments - downloads attachments from a Launchpad bug

SYNOPSIS

       grab-attachments [options] bug-number...
       grab-attachments -h

DESCRIPTION

       grab-attachments  is  a	script	to  download  all attachments from a Launchpad bug report or bug reports with a source package task into a
       directory named after the bug e.g. bug-1.

OPTIONS

       Listed below are the command line options for grab-attachments:

       bug-number
	      Specifies the Launchpad bug number that the script should download attachments from.

       -h, --help
	      Display a help message and exit.

       -l INSTANCE, --lpinstance=INSTANCE
	      Use the specified instance of Launchpad (e.g. "staging"), instead of the default of "production".

       --no-conf
	      Do not read any configuration files, or configuration from environment variables.

       -d, --duplicates
	      Download attachments from duplicates too.

       -p SRCPACKAGE, --package=SRCPACKAGE
	      Download attachments from all bugs with a task for this source package.

AUTHOR

       lp-grab-attachments was written by Daniel Holbach and this manual page was written by Jonathan Patrick Davies.

       Both are released under the GNU General Public License, version 3.

lptools 							  10 August 2008					       GRAB-ATTACHMENTS(1)
All times are GMT -4. The time now is 08:46 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy