Sponsored Content
Top Forums Shell Programming and Scripting remove duplicate lines using awk Post 302492336 by sudvishw on Monday 31st of January 2011 03:59:58 AM
Old 01-31-2011
Hi,
Thanks for your explanation. If I understand it right, suppose we have a file as shown below:
Code:
hi
hi
hii
hi

Here hi comes 3 times.

First time when hi comes, x[hi] will be initialized to 0, which is negated and so it becomes 1 and the line is printed. Second time, x[hi] will be 1, which gets negated and so it becomes 0 and the line is not printed.

If I am not wrong, third time, x[hi] will be 0, which gets negated to 1 and the line should be printed. I think there is something I am missing here. Please clarify.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Remove Duplicate Lines in File

I am doing KSH script to remove duplicate lines in a file. Let say the file has format below. FileA 1253-6856 3101-4011 1827-1356 1822-1157 1822-1157 1000-1410 1000-1410 1822-1231 1822-1231 3101-4011 1822-1157 1822-1231 and I want to simply it with no duplicate line as file... (5 Replies)
Discussion started by: Teh Tiack Ein
5 Replies

2. Shell Programming and Scripting

how to remove duplicate lines

I have following file content (3 fields each line): 23 888 10.0.0.1 dfh 787 10.0.0.2 dssf dgfas 10.0.0.3 dsgas dg 10.0.0.4 df dasa 10.0.0.5 df dag 10.0.0.5 dfd dfdas 10.0.0.5 dfd dfd 10.0.0.6 daf nfd 10.0.0.6 ... as can be seen, that the third field is ip address and sorted. but... (3 Replies)
Discussion started by: fredao
3 Replies

3. UNIX for Dummies Questions & Answers

Remove Duplicate lines from File

I have a log file "logreport" that contains several lines as seen below: 04:20:00 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping 06:38:08 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but responded to ping 07:11:05 /usr/lib/snmp/snmpdx: Agent snmpd appeared dead but... (18 Replies)
Discussion started by: Nysif Steve
18 Replies

4. Shell Programming and Scripting

Command to remove duplicate lines with perl,sed,awk

Input: hello hello hello hello monkey donkey hello hello drink dance drink Output should be: hello hello monkey donkey drink dance (9 Replies)
Discussion started by: cola
9 Replies

5. Shell Programming and Scripting

Remove duplicate lines

Hi, I have a huge file which is about 50GB. There are many lines. The file format likes 21 rs885550 0 9887804 C C T C C C C C C C 21 rs210498 0 9928860 0 0 C C 0 0 0 0 0 0 21 rs303304 0 9941889 A A A A A A A A A A 22 rs303304 0 9941890 0 A A A A A A A A A The question is that there are a few... (4 Replies)
Discussion started by: zhshqzyc
4 Replies

6. Shell Programming and Scripting

[uniq + awk?] How to remove duplicate blocks of lines in files?

Hello again, I am wanting to remove all duplicate blocks of XML code in a file. This is an example: input: <string-array name="threeItems"> <item>item1</item> <item>item2</item> <item>item3</item> </string-array> <string-array name="twoItems"> <item>item1</item> <item>item2</item>... (19 Replies)
Discussion started by: raidzero
19 Replies

7. Shell Programming and Scripting

Cant get awk 1liner to remove duplicate lines from Delimited file, get "event not found" error..help

Hi, I am on a Solaris8 machine If someone can help me with adjusting this awk 1 liner (turning it into a real awkscript) to get by this "event not found error" ...or Present Perl solution code that works for Perl5.8 in the csh shell ...that would be great. ****************** ... (3 Replies)
Discussion started by: andy b
3 Replies

8. UNIX for Dummies Questions & Answers

Remove Duplicate Lines

Hi I need this output. Thanks. Input: TAZ YET FOO FOO VAK TAZ BAR Output: YET VAK BAR (10 Replies)
Discussion started by: tara123
10 Replies

9. Shell Programming and Scripting

How to remove duplicate lines?

Hi All, I am storing the result in the variable result_text using the below code. result_text=$(printf "$result_text\t\n$name") The result_text is having the below text. Which is having duplicate lines. file and time for the interval 03:30 - 03:45 file and time for the interval 03:30 - 03:45 ... (4 Replies)
Discussion started by: nalu
4 Replies

10. Shell Programming and Scripting

How to put the command to remove duplicate lines in my awk script?

I create a CGI in bash/html. My awk script looks like : echo "<table>" for fn in /var/www/cgi-bin/LPAR_MAP/*; do echo "<td>" echo "<PRE>" awk -F',|;' -v test="$test" ' NR==1 { split(FILENAME ,a,""); } $0 ~ test { if(!header++){ ... (12 Replies)
Discussion started by: Tim2424
12 Replies
FILE2C(1)						    BSD General Commands Manual 						 FILE2C(1)

NAME
file2c -- convert file to c-source SYNOPSIS
file2c [-sx] [-n count] [prefix [suffix]] DESCRIPTION
The file2c utility reads a file from stdin and writes it to stdout, converting each byte to its decimal or hexadecimal representation on the fly. The byte values are separated by a comma. This also means that the last byte value is not followed by a comma. By default the byte values are printed in decimal, but when the -x option is given, the values will be printed in hexadecimal. When -s option is given, each line is printed with a leading tab and each comma is followed by a space except for the last one on the line. If more than 70 characters are printed on the same line, that line is ended and the output continues on the next line. With the -n option this can be made to happen after the specified number of byte values have been printed. The length of the line will not be considered any- more. To have all the byte values printed on the same line, give the -n option a negative number. A prefix and suffix strings can be printed before and after the byte values (resp.) If a suffix is to be printed, a prefix must also be specified. The first non-option word is the prefix, which may optionally be followed by a word that is to be used as the suffix. This program is typically used to embed binary files into C source files. The prefix is used to define an array type and the suffix is used to end the C statement. The -n, -s and -x options are useful when the binary data represents a bitmap and the output needs to remain read- able and/or editable. Fonts, for example, are a good example of this. EXAMPLES
The command: date | file2c 'const char date[] = {' ',0};' will produce: const char date[] = { 83,97,116,32,74,97,110,32,50,56,32,49,54,58,50,56,58,48,53, 32,80,83,84,32,49,57,57,53,10 ,0}; BSD
March 22, 2007 BSD
All times are GMT -4. The time now is 04:24 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy