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Full Discussion: Sorting
Top Forums Shell Programming and Scripting Sorting Post 302422580 by durden_tyler on Tuesday 18th of May 2010 11:48:13 PM
Old 05-19-2010
Quote:
Originally Posted by Ernst
... Basically what I am trying to do is to the following:
The output data for all the groups has 6 entries.But while most of the groups has only three entries filled, some groups have all 6 entries filled. What I want to do is Whenever the script reads the file and sees a group with only 3 entries filled, it needs to print the three rows that have data but strip the other three empty rows; for the groups with 6 entries filled, it just needs to print them out. ...

For your info, my input file format was as follows:
554.3=432
554.2=264
554.1=96
555.3=452
555.2=284
555.1=116
556.3=488
556.2=320
556.1=152
557.3=340
557.2=172
557.1=4
558.3=356
558.2=188
558.1=20
559.3=108
559.2=276
559.1=444

...
Firstly, the Perl one-liner posted earlier will *not* work for groups of 6 lines. It works *only* for groups of 3 lines.

Secondly, it may be beneficial if you could post some test data for groups of 3 lines as well as 6 lines. And post the output as well that shows what exactly is to be done for each group.

The input you've posted above is difficult to comprehend because it does not have the blank line that separates one group from the other.

tyler_durden
 
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groups(1)						      General Commands Manual							 groups(1)

NAME
groups - Displays your group membership SYNOPSIS
groups [user] DESCRIPTION
The groups command writes to standard output the groups to which you or the specified user belong. The Tru64 UNIX operating system allows a user to belong to many different groups at the same time. Your primary group is specified in the /etc/passwd file. Once you are logged in, you can change your active group with the newgrp shell command (see sh). When you create a file, its group ID is that of your active group. Other groups that you belong to are specified in the /etc/group file. If you belong to more than one group, you can access files belonging to any of those groups without changing your primary group ID. These are called your concurrent groups. NOTES
The /etc/passwd and /etc/group files must be on the same node. EXAMPLES
To determine your group membership, enter: groups The groups to which you belong will be displayed. For example: devel prod FILES
Contains group information. Contains user information. SEE ALSO
Commands: csh(1), ksh(1), sh(1) Functions: initgroups(3), setgroups(2) groups(1)

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