I am new to C programming. I have been trying to display unique lines in a file from past two days. The problem is here,
I have a file whose contents are,
and i need to display all unique lines. And the output should be,
Please help me how to do it using C language.
Thanks in advance.
Last edited by Franklin52; 07-04-2011 at 09:23 AM..
Reason: Please use code tags for code and data samples, thank you
Hi,
how i can display all the unique number from my random number script below;
#!/usr/bin/perl
use strict;
my @alphanum = ( 'A' .. 'Z', 'a' .. 'z', 0 .. 9);
my $random = join('', map($alphanum,(1..5)));
print "$random\n";
Thank You. (1 Reply)
I have a file, test.txt with approx 12,000 lines. Each line is a single word that looks like a hex address. There are many repeats. Over half of the lines are the same. I want to count how many UNIQUE lines there are.
#>more test.txt
0x123456
0x56AF23
0x99ABC1
0x123456
0x123456
0x99ABC1... (3 Replies)
Hi all! Im wondering if its possible to remove all lines between two lines. Im working with a document like this:
data1
data2
<Remove>
data3
data4
</Remove>
data5
data6
I need it to end up like this if that possible:
data1
data2
data5
data6
There are multiple instances of... (2 Replies)
Use and complete the template provided. The entire template must be completed. If you don't, your post may be deleted!
1. The problem statement, all variables and given/known data:
The uniq command excludes consecutive duplicate lines. It has a -c option to display a count of the number... (1 Reply)
Hi All,
I have a very huge file (4GB) which has duplicate lines. I want to delete duplicate lines leaving unique lines. Sort, uniq, awk '!x++' are not working as its running out of buffer space.
I dont know if this works : I want to read each line of the File in a For Loop, and want to... (16 Replies)
I am having a file with duplicate words how can I eliminate them
ant,bat
bat,cat
cat a.txt | grep -bat | awk '{print $1}'
expecting o/p as ant,bat,cat
How can I display the output as ant,bat,cat in a single line and no duplicates exists. (2 Replies)
hi
i have used comm -13 <(sort 1.txt) <(sort 2.txt) option to get the unique lines that are present in file 2 but not in file 1. but some how i am getting the entire file 2. i would expect few but not all uncommon lines fro my dat. is there anything wrong with the way i used the command?
my... (1 Reply)
Hello to all, happy new year 2013!
May somebody could help me, is about a very similar problem to the problem I've posted here where the member rdrtx1 and bipinajith helped me a lot.
https://www.unix.com/shell-programming-scripting/211147-map-values-blocks-single-line-2.html
It is very... (3 Replies)
I would like to print unique lines without sort or unique. Unfortunately the server I am working on does not have sort or unique. I have not been able to contact the administrator of the server to ask him to add it for several weeks. (7 Replies)
When I use the below awk to count the unique lines in $4 for the input it seems to work. The answer is 3 because $4 is only unique 3 times in all the entries. However, when I use the same on actual data I get 56,536 and I know the answer should be 56,548. My question is there a better way to... (8 Replies)
Discussion started by: cmccabe
8 Replies
LEARN ABOUT SUSE
comm
COMM(1) User Commands COMM(1)NAME
comm - compare two sorted files line by line
SYNOPSIS
comm [OPTION]... FILE1 FILE2
DESCRIPTION
Compare sorted files FILE1 and FILE2 line by line.
With no options, produce three-column output. Column one contains lines unique to FILE1, column two contains lines unique to FILE2, and
column three contains lines common to both files.
-1 suppress lines unique to FILE1
-2 suppress lines unique to FILE2
-3 suppress lines that appear in both files
--check-order
check that the input is correctly sorted, even if all input lines are pairable
--nocheck-order
do not check that the input is correctly sorted
--output-delimiter=STR
separate columns with STR
--help display this help and exit
--version
output version information and exit
AUTHOR
Written by Richard M. Stallman and David MacKenzie.
REPORTING BUGS
Report comm bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The full documentation for comm is maintained as a Texinfo manual. If the info and comm programs are properly installed at your site, the
command
info coreutils 'comm invocation'
should give you access to the complete manual.
GNU coreutils 7.1 July 2010 COMM(1)