Login or Register to Ask a Question and Join Our Community


UNIX for Dummies Questions & Answers

How to get the last line of a repeted feild

 
Thread Tools Search this Thread
Top Forums UNIX for Dummies Questions & Answers How to get the last line of a repeted feild
# 1  
Old 10-29-2009
How to get the last line of a repeted feild
i have a file having two feilds. the numbers in the first field may or may not having repition in the file . i want to make a file out of this file containg only the last repeted number and the non repeted number.
example is
111 2
222 5
333 7
111 1
777 9
222 8
999 1
333 3


and the requirement is
111 1
222 8
333 3
777 9
999 1
# 2  
Old 10-29-2009
use awk..
Code:
awk '{A[$1]=$2}END{for(i in A){print i" "A[i]}}' filename

# 3  
Old 10-29-2009
thanks a lot ..it works. thanks
 
Login or Register to Ask a Question

Previous Thread | Next Thread

9 More Discussions You Might Find Interesting

1. UNIX for Beginners Questions & Answers

Get an output of lines in pattern 1st line then 10th line then 11th line then 20th line and so on.

Input file: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 (6 Replies)
Discussion started by: Sagar Singh
6 Replies

2. Shell Programming and Scripting

How to read file line by line and compare subset of 1st line with 2nd?

Hi all, I have a log file say Test.log that gets updated continuously and it has data in pipe separated format. A sample log file would look like: <date1>|<data1>|<url1>|<result1> <date2>|<data2>|<url2>|<result2> <date3>|<data3>|<url3>|<result3> <date4>|<data4>|<url4>|<result4> What I... (3 Replies)
Discussion started by: pat_pramod
3 Replies

3. Shell Programming and Scripting

Need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line...

Hello, I need a program that read a file line by line and prints out lines 1, 2 & 3 after an empty line... An example of entries in the file would be: SRVXPAPI001 ERRO JUN24 07:28:34 1775 REASON= 0000, PROCID= #E506 #1065: TPCIPPR, INDEX= 003F ... (8 Replies)
Discussion started by: Ferocci
8 Replies

4. Shell Programming and Scripting

sed command to replace a line at a specific line number with some other line

my requirement is, consider a file output cat output blah sdjfhjkd jsdfhjksdh sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf hellow there this doesnt look good et cetc etc etcetera i want to replace a line of line number 4 ("this doesnt look good") with some other line ... (3 Replies)
Discussion started by: vivek d r
3 Replies

5. Shell Programming and Scripting

how to read the contents of two files line by line and compare the line by line?

Hi All, I'm trying to figure out which are the trusted-ips and which are not using a script file.. I have a file named 'ip-list.txt' which contains some ip addresses and another file named 'trusted-ip-list.txt' which also contains some ip addresses. I want to read a line from... (4 Replies)
Discussion started by: mjavalkar
4 Replies

6. Solaris

Line too long error Replace string with new line line character

I get a file which has all its content in a single row. The file contains xml data containing 3000 records, but all in a single row, making it difficult for Unix to Process the file. I decided to insert a new line character at all occurrences of a particular string in this file (say replacing... (4 Replies)
Discussion started by: ducati
4 Replies

7. Shell Programming and Scripting

[Solved] Problem in reading a file line by line till it reaches a white line

So, I want to read line-by-line a text file with unknown number of files.... So: a=1 b=1 while ; do b=`sed -n '$ap' test` a=`expr $a + 1` $here do something with b etc done the problem is that sed does not seem to recognise the $a, even when trying sed -n ' $a p' So, I cannot read... (3 Replies)
Discussion started by: hakermania
3 Replies

8. Shell Programming and Scripting

Awk reporting. Format the output with left justification for every feild

Fallowing is the input file that is pipe seperated. is it possible to generated the report that is alligned left justifed as that of sample output. I apprecitae your help on this. InputFile (temp.txt): 108005555|001|christina.lipski||Submitter... (3 Replies)
Discussion started by: ainuddin
3 Replies

9. Shell Programming and Scripting

printing 3rd or 4th feild from last in awk.

Whats up fellas... hope someone can help me with the following... I am parsing an file that is space delimited, however, in the middle, there is an ugly "Account Name" feild that in itself has multiple varying spaces, and commas which throws off my script. The 1st 3 feilds I am able to obtain... (8 Replies)
Discussion started by: djsal
8 Replies
Login or Register to Ask a Question