Login or Register to Ask a Question and Join Our Community

Sponsored Content
Full Discussion: Print last occurrence if first field match
Top Forums Shell Programming and Scripting Print last occurrence if first field match Post 302145820 by vgersh99 on Thursday 15th of November 2007 09:50:23 AM
Old 11-15-2007
assuming your input is sorted based on the first column...

nawk -f ray.awk myInputFile

ray.awk:
Code:
# if the value in the first column ($1) does not equal the value stored in "prevIDX"
# and we are not at the FIRST record (FNR != 1) [FNR = RecordNumber in the current File]- print the value of "prev"
$1 != prevIDX && FNR != 1 { print prev}

# assign the value of the FIRST field ($1) to a variable "prevIDX"
# assign the entire record/line to the variable "prev"
{ prevIDX=$1; prev=$0 }

# after ALL the records/lines were processed - print the value of the variable "prev" 
# the last/dangling record/line
END { print prev }

Last edited by vgersh99; 11-15-2007 at 11:17 AM..
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Script to Match first field of two Files and print

Hi, I want to get script or command in Sun Unix which matches first fields of both the files and print the feilds of one files, example may make it more clear. InputFile1 ================== Alex,1,fgh Menthos,45454,toto Gothica,855,ee Zenie4,77,gg Salvatore,66,oo Dhin,1234,papapa... (3 Replies)
Discussion started by: indian.ace
3 Replies

2. Shell Programming and Scripting

last occurrence of a match through multiple files

Hi all, I have a lot of files with extension ".o" and I would like to extract the 10th line after (last) occurrence of a given string in each of the files. I tried: $ grep "string_to_look_for" *.o -A 10 | tail -1 but it gives the occurrence in the last file with extension .o ... (1 Reply)
Discussion started by: f_o_555
1 Replies

3. Shell Programming and Scripting

sed print from last occurrence match until the end of file

Hi, i have file f1.txt with data like: CHECK a b CHECK c d CHECK e f JOB_START .... I want to match the last occurrence of 'CHECK' until the end of the file. I can use awk: awk '/^CHECK/ { buf = "" } { buf = buf "\n" $0 } END { print buf }' f1.txt | tail +2Is there a cleaner way of... (2 Replies)
Discussion started by: ysrini
2 Replies

4. UNIX for Dummies Questions & Answers

Match pattern in a field, print pattern only instead of the entire field

Hi ! I have a tab-delimited file, file.tab: Column1 Column2 Column3 aaaaaaaaaa bbtomatoesbbbbbb cccccccccc ddddddddd eeeeappleseeeeeeeee ffffffffffffff ggggggggg hhhhhhtomatoeshhh iiiiiiiiiiiiiiii ... (18 Replies)
Discussion started by: lucasvs
18 Replies

5. UNIX for Dummies Questions & Answers

[Solved] Replace first occurrence after match

hey guys, i have been trying to work this thing out with sed with no luck :confused: i m looking for a way to replace only the first occurrence after a match for example : Cat Realized what you gotta do Dog Realized what you gotta do Sheep Realized what you gotta do Wolf Realized... (6 Replies)
Discussion started by: boaz733
6 Replies

6. Shell Programming and Scripting

Egrep - Only Match First Occurrence

echo 'String#1 and String#2' | egrep -o -m 1 'String#.{1}' String#1 String#2 I'm trying to just match the first occurrence of 'String#' + 1 character. I thought the "-m 1" switch would do that for me. Instead I get both occurrences. Can somebody provide some insight? Thanks! (5 Replies)
Discussion started by: sudo
5 Replies

7. Shell Programming and Scripting

Match columns and print specific field

Hello, I have data in following format. ... (6 Replies)
Discussion started by: Pushpraj
6 Replies

8. Shell Programming and Scripting

Command/script to match a field and print the next field of each line in a file.

Hello, I have a text file in the below format: Source Destination State Lag Status CQA02W2K12pl:D:\CAQA ... (10 Replies)
Discussion started by: pocodot
10 Replies

9. Shell Programming and Scripting

sed print from last occurrence match until the end of last occurrence match

Hi, i have file file.txt with data like: START 03:11:30 a 03:11:40 b END START 03:13:30 eee 03:13:35 fff END jjjjjjjjjjjjjjjjjjjjj START 03:14:30 eee 03:15:30 fff END ggggggggggg iiiiiiiiiiiiiiiiiiiiiiiii I want the below output START (13 Replies)
Discussion started by: Jyotshna
13 Replies

10. Shell Programming and Scripting

awk to print text in field if match and range is met

In the awk below I am trying to match the value in $4 of file1 with the split value from $4 in file2. I store the value of $4 in file1 in A and the split value (using the _ for the split) in array. I then strore the value in $2 as min, the value in $3 as max, and the value in $1 as chr. If A is... (6 Replies)
Discussion started by: cmccabe
6 Replies

LEARN ABOUT CENTOS

grub-render-label

GRUB-RENDER-LABEL(1)                                               User Commands                                              GRUB-RENDER-LABEL(1)

NAME

       grub-render-label - generate a .disk_label for Apple Macs.

SYNOPSIS

       grub-render-label [OPTION...] [OPTIONS]

DESCRIPTION

       Render Apple .disk_label.

       -b, --bgcolor=COLOR
              use COLOR for background

       -c, --color=COLOR
              use COLOR for text

       -f, --font=FILE
              use FILE as font (PF2).

       -i, --input=FILE
              read text from FILE.

       -o, --output=FILE
              set output filename. Default is STDOUT

       -t, --text=STRING
              set the label to render

       -v, --verbose
              print verbose messages.

       -?, --help
              give this help list

       --usage
              give a short usage message

       -V, --version
              print program version

       Mandatory or optional arguments to long options are also mandatory or optional for any corresponding short options.

REPORTING BUGS

       Report bugs to <bug-grub@gnu.org>.

SEE ALSO

       The  full  documentation  for grub-render-label is maintained as a Texinfo manual.  If the info and grub-render-label programs are properly
       installed at your site, the command

              info grub-render-label

       should give you access to the complete manual.

grub-render-label (GRUB) 2.02-2ubuntu8.3                             July 2018                                                GRUB-RENDER-LABEL(1)
All times are GMT -4. The time now is 09:45 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy